Merge branch 'main' into users/meinersbur/flang_runtime_split-headersusers/meinersbur/flang_runtime_split-headers

65 files changed, 7424 insertions, 127 deletions

diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
index 6fdaa6c03c0c..eb407183c99f 100644
--- a/libc/include/CMakeLists.txt
+++ b/libc/include/CMakeLists.txt
@@ -32,7 +32,7 @@ endmacro()
 
 add_header_macro(
   ctype
-  ../libc/hdrgen/yaml/ctype.yaml
+  ../libc/include/ctype.yaml
   ctype.h.def
   ctype.h
   DEPENDS
@@ -42,7 +42,7 @@ add_header_macro(
 
 add_header_macro(
   dirent
-  ../libc/hdrgen/yaml/dirent.yaml
+  ../libc/include/dirent.yaml
   dirent.h.def
   dirent.h
   DEPENDS
@@ -54,7 +54,7 @@ add_header_macro(
 
 add_header_macro(
   fcntl
-  ../libc/hdrgen/yaml/fcntl.yaml
+  ../libc/include/fcntl.yaml
   fcntl.h.def
   fcntl.h
   DEPENDS
@@ -70,7 +70,7 @@ add_header_macro(
 
 add_header_macro(
   dlfcn
-  ../libc/hdrgen/yaml/dlfcn.yaml
+  ../libc/include/dlfcn.yaml
   dlfcn.h.def
   dlfcn.h
   DEPENDS
@@ -80,7 +80,7 @@ add_header_macro(
 
 add_header_macro(
   features
-  ../libc/hdrgen/yaml/features.yaml
+  ../libc/include/features.yaml
   features.h.def
   features.h
   DEPENDS
@@ -90,7 +90,7 @@ add_header_macro(
 
 add_header_macro(
   fenv
-  ../libc/hdrgen/yaml/fenv.yaml
+  ../libc/include/fenv.yaml
   fenv.h.def
   fenv.h
   DEPENDS
@@ -102,7 +102,7 @@ add_header_macro(
 
 add_header_macro(
   inttypes
-  ../libc/hdrgen/yaml/inttypes.yaml
+  ../libc/include/inttypes.yaml
   inttypes.h.def
   inttypes.h
   DEPENDS
@@ -113,7 +113,7 @@ add_header_macro(
 
 add_header_macro(
   float
-  ../libc/hdrgen/yaml/float.yaml
+  ../libc/include/float.yaml
   float.h.def
   float.h
   DEPENDS
@@ -122,7 +122,7 @@ add_header_macro(
 
 add_header_macro(
   stdint
-  ../libc/hdrgen/yaml/stdint.yaml
+  ../libc/include/stdint.yaml
   stdint.h.def
   stdint.h
   DEPENDS
@@ -131,7 +131,7 @@ add_header_macro(
 
 add_header_macro(
   limits
-  ../libc/hdrgen/yaml/limits.yaml
+  ../libc/include/limits.yaml
   limits.h.def
   limits.h
   DEPENDS
@@ -140,7 +140,7 @@ add_header_macro(
 
 add_header_macro(
   malloc
-  ../libc/hdrgen/yaml/malloc.yaml
+  ../libc/include/malloc.yaml
   malloc.h.def
   malloc.h
   DEPENDS
@@ -150,7 +150,7 @@ add_header_macro(
 
 add_header_macro(
   math
-  ../libc/hdrgen/yaml/math.yaml
+  ../libc/include/math.yaml
   math.h.def
   math.h
   DEPENDS
@@ -165,7 +165,7 @@ add_header_macro(
 
 add_header_macro(
   stdfix
-  ../libc/hdrgen/yaml/stdfix.yaml
+  ../libc/include/stdfix.yaml
   stdfix.h.def
   stdfix.h
   DEPENDS
@@ -178,7 +178,7 @@ file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/arpa)
 
 add_header_macro(
   arpa_inet
-  ../libc/hdrgen/yaml/arpa/inet.yaml
+  ../libc/include/arpa/inet.yaml
   arpa/inet.h.def
   arpa/inet.h
   DEPENDS
@@ -187,7 +187,7 @@ add_header_macro(
 
 add_header_macro(
   assert
-  ../libc/hdrgen/yaml/assert.yaml
+  ../libc/include/assert.yaml
   assert.h.def
   assert.h
   DEPENDS
@@ -197,7 +197,7 @@ add_header_macro(
 
 add_header_macro(
   complex
-  ../libc/hdrgen/yaml/complex.yaml
+  ../libc/include/complex.yaml
   complex.h.def
   complex.h
   DEPENDS
@@ -207,7 +207,7 @@ add_header_macro(
 
 add_header_macro(
   setjmp
-  ../libc/hdrgen/yaml/setjmp.yaml
+  ../libc/include/setjmp.yaml
   setjmp.h.def
   setjmp.h
   DEPENDS
@@ -217,7 +217,7 @@ add_header_macro(
 
 add_header_macro(
   string
-  ../libc/hdrgen/yaml/string.yaml
+  ../libc/include/string.yaml
   string.h.def
   string.h
   DEPENDS
@@ -228,7 +228,7 @@ add_header_macro(
 
 add_header_macro(
   strings
-  ../libc/hdrgen/yaml/strings.yaml
+  ../libc/include/strings.yaml
   strings.h.def
   strings.h
   DEPENDS
@@ -238,7 +238,7 @@ add_header_macro(
 
 add_header_macro(
   search
-  ../libc/hdrgen/yaml/search.yaml
+  ../libc/include/search.yaml
   search.h.def
   search.h
   DEPENDS
@@ -252,7 +252,7 @@ add_header_macro(
 
 add_header_macro(
   time
-  ../libc/hdrgen/yaml/time.yaml
+  ../libc/include/time.yaml
   time.h.def
   time.h
   DEPENDS
@@ -268,7 +268,7 @@ add_header_macro(
 
 add_header_macro(
   threads
-  ../libc/hdrgen/yaml/threads.yaml
+  ../libc/include/threads.yaml
   threads.h.def
   threads.h
   DEPENDS
@@ -285,7 +285,7 @@ add_header_macro(
 
 add_header_macro(
   errno
-  ../libc/hdrgen/yaml/errno.yaml
+  ../libc/include/errno.yaml
   errno.h.def
   errno.h
   DEPENDS
@@ -295,7 +295,7 @@ add_header_macro(
 
 add_header_macro(
   signal
-  ../libc/hdrgen/yaml/signal.yaml
+  ../libc/include/signal.yaml
   signal.h.def
   signal.h
   DEPENDS
@@ -311,7 +311,7 @@ add_header_macro(
 
 add_header_macro(
   stdbit
-  ../libc/hdrgen/yaml/stdbit.yaml
+  ../libc/include/stdbit.yaml
   stdbit.h.def
   stdbit.h
   DEPENDS
@@ -321,7 +321,7 @@ add_header_macro(
 
 add_header_macro(
   stdckdint
-  ../libc/hdrgen/yaml/stdckdint.yaml
+  ../libc/include/stdckdint.yaml
   stdckdint.h.def
   stdckdint.h
   DEPENDS
@@ -331,7 +331,7 @@ add_header_macro(
 
 add_header_macro(
   stdio
-  ../libc/hdrgen/yaml/stdio.yaml
+  ../libc/include/stdio.yaml
   stdio.h.def
   stdio.h
   DEPENDS
@@ -347,7 +347,7 @@ add_header_macro(
 
 add_header_macro(
   stdlib
-  ../libc/hdrgen/yaml/stdlib.yaml
+  ../libc/include/stdlib.yaml
   stdlib.h.def
   stdlib.h
   DEPENDS
@@ -366,7 +366,7 @@ add_header_macro(
 
 add_header_macro(
   unistd
-  ../libc/hdrgen/yaml/unistd.yaml
+  ../libc/include/unistd.yaml
   unistd.h.def
   unistd.h
   DEPENDS
@@ -385,11 +385,11 @@ add_header_macro(
 
 add_header_macro(
   pthread
-  ../libc/hdrgen/yaml/pthread.yaml
+  ../libc/include/pthread.yaml
   pthread.h.def
   pthread.h
   DEPENDS
-    .llvm_libc_common_h
+    .llvm-libc-macros.pthread_macros
     .llvm-libc-types.__atfork_callback_t
     .llvm-libc-types.__pthread_once_func_t
     .llvm-libc-types.__pthread_start_t
@@ -404,11 +404,12 @@ add_header_macro(
     .llvm-libc-types.pthread_rwlockattr_t
     .llvm-libc-types.pthread_spinlock_t
     .llvm-libc-types.pthread_t
+    .llvm_libc_common_h
 )
 
 add_header_macro(
   sched
-  ../libc/hdrgen/yaml/sched.yaml
+  ../libc/include/sched.yaml
   sched.h.def
   sched.h
   DEPENDS
@@ -425,7 +426,7 @@ add_header_macro(
 
 add_header_macro(
   spawn
-  ../libc/hdrgen/yaml/spawn.yaml
+  ../libc/include/spawn.yaml
   spawn.h.def
   spawn.h
   DEPENDS
@@ -438,7 +439,7 @@ add_header_macro(
 
 add_header_macro(
   link
-  ../libc/hdrgen/yaml/link.yaml
+  ../libc/include/link.yaml
   link.h.def
   link.h
   DEPENDS
@@ -448,7 +449,7 @@ add_header_macro(
 
 add_header_macro(
   elf
-  ../libc/hdrgen/yaml/elf.yaml
+  ../libc/include/elf.yaml
   elf.h.def
   elf.h
   DEPENDS
@@ -462,7 +463,7 @@ file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/sys)
 
 add_header_macro(
   sys_auxv
-  ../libc/hdrgen/yaml/sys/auxv.yaml
+  ../libc/include/sys/auxv.yaml
   sys/auxv.h.def
   sys/auxv.h
   DEPENDS
@@ -472,7 +473,7 @@ add_header_macro(
 
 add_header_macro(
   sys_epoll
-  ../libc/hdrgen/yaml/sys/epoll.yaml
+  ../libc/include/sys/epoll.yaml
   sys/epoll.h.def
   sys/epoll.h
   DEPENDS
@@ -485,7 +486,7 @@ add_header_macro(
 
 add_header_macro(
   sys_ioctl
-  ../libc/hdrgen/yaml/sys/ioctl.yaml
+  ../libc/include/sys/ioctl.yaml
   sys/ioctl.h.def
   sys/ioctl.h
   DEPENDS
@@ -495,7 +496,7 @@ add_header_macro(
 
 add_header_macro(
   sys_mman
-  ../libc/hdrgen/yaml/sys/mman.yaml
+  ../libc/include/sys/mman.yaml
   sys/mman.h.def
   sys/mman.h
   DEPENDS
@@ -508,7 +509,7 @@ add_header_macro(
 
 add_header_macro(
   sys_prctl
-  ../libc/hdrgen/yaml/sys/prctl.yaml
+  ../libc/include/sys/prctl.yaml
   sys/prctl.h.def
   sys/prctl.h
   DEPENDS
@@ -525,7 +526,7 @@ add_header(
 
 add_header_macro(
   sys_random
-  ../libc/hdrgen/yaml/sys/random.yaml
+  ../libc/include/sys/random.yaml
   sys/random.h.def
   sys/random.h
   DEPENDS
@@ -537,7 +538,7 @@ add_header_macro(
 
 add_header_macro(
   sys_resource
-  ../libc/hdrgen/yaml/sys/resource.yaml
+  ../libc/include/sys/resource.yaml
   sys/resource.h.def
   sys/resource.h
   DEPENDS
@@ -549,7 +550,7 @@ add_header_macro(
 
 add_header_macro(
   sys_stat
-  ../libc/hdrgen/yaml/sys/stat.yaml
+  ../libc/include/sys/stat.yaml
   sys/stat.h.def
   sys/stat.h
   DEPENDS
@@ -571,7 +572,7 @@ add_header_macro(
 
 add_header_macro(
   sys_select
-  ../libc/hdrgen/yaml/sys/select.yaml
+  ../libc/include/sys/select.yaml
   sys/select.h.def
   sys/select.h
   DEPENDS
@@ -587,7 +588,7 @@ add_header_macro(
 
 add_header_macro(
   sys_sendfile
-  ../libc/hdrgen/yaml/sys/sendfile.yaml
+  ../libc/include/sys/sendfile.yaml
   sys/sendfile.h.def
   sys/sendfile.h
   DEPENDS
@@ -599,7 +600,7 @@ add_header_macro(
 
 add_header_macro(
   sys_socket
-  ../libc/hdrgen/yaml/sys/socket.yaml
+  ../libc/include/sys/socket.yaml
   sys/socket.h.def
   sys/socket.h
   DEPENDS
@@ -615,7 +616,7 @@ add_header_macro(
 
 add_header_macro(
   sys_statvfs
-  ../libc/hdrgen/yaml/sys/statvfs.yaml
+  ../libc/include/sys/statvfs.yaml
   sys/statvfs.h.def
   sys/statvfs.h
   DEPENDS
@@ -625,7 +626,7 @@ add_header_macro(
 
 add_header_macro(
   sys_syscall
-  ../libc/hdrgen/yaml/sys/syscall.yaml
+  ../libc/include/sys/syscall.yaml
   sys/syscall.h.def
   sys/syscall.h
   DEPENDS
@@ -633,7 +634,7 @@ add_header_macro(
 
 add_header_macro(
   sys_time
-  ../libc/hdrgen/yaml/sys/time.yaml
+  ../libc/include/sys/time.yaml
   sys/time.h.def
   sys/time.h
   DEPENDS
@@ -644,7 +645,7 @@ add_header_macro(
 
 add_header_macro(
   sys_types
-  ../libc/hdrgen/yaml/sys/types.yaml
+  ../libc/include/sys/types.yaml
   sys/types.h.def
   sys/types.h
   DEPENDS
@@ -674,7 +675,7 @@ add_header_macro(
 
 add_header_macro(
   sys_utsname
-  ../libc/hdrgen/yaml/sys/utsname.yaml
+  ../libc/include/sys/utsname.yaml
   sys/utsname.h.def
   sys/utsname.h
   DEPENDS
@@ -684,7 +685,7 @@ add_header_macro(
 
 add_header_macro(
   sys_wait
-  ../libc/hdrgen/yaml/sys/wait.yaml
+  ../libc/include/sys/wait.yaml
   sys/wait.h.def
   sys/wait.h
   DEPENDS
@@ -697,7 +698,7 @@ add_header_macro(
 
 add_header_macro(
   termios
-  ../libc/hdrgen/yaml/termios.yaml
+  ../libc/include/termios.yaml
   termios.h.def
   termios.h
   DEPENDS
@@ -712,7 +713,7 @@ add_header_macro(
 
 add_header_macro(
   uchar
-  ../libc/hdrgen/yaml/uchar.yaml
+  ../libc/include/uchar.yaml
   uchar.h.def
   uchar.h
   DEPENDS
@@ -725,7 +726,7 @@ add_header_macro(
 
 add_header_macro(
   wchar
-  ../libc/hdrgen/yaml/wchar.yaml
+  ../libc/include/wchar.yaml
   wchar.h.def
   wchar.h
   DEPENDS
@@ -739,7 +740,7 @@ add_header_macro(
 
 add_header_macro(
   locale
-  ../libc/hdrgen/yaml/locale.yaml
+  ../libc/include/locale.yaml
   locale.h.def
   locale.h
   DEPENDS
@@ -749,19 +750,6 @@ add_header_macro(
     .llvm-libc-types.struct_lconv
 )
 
-if(LIBC_TARGET_OS_IS_GPU)
-  file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/gpu)
-
-  add_header_macro(
-    gpu_rpc
-    ../libc/hdrgen/yaml/gpu/rpc.yaml
-    gpu/rpc.h.def
-    gpu/rpc.h
-    DEPENDS
-      .llvm_libc_common_h
-  )
-endif()
-
 if(NOT LLVM_LIBC_FULL_BUILD)
   # We don't install headers in non-fullbuild mode.
   return()
diff --git a/libc/include/__llvm-libc-common.h b/libc/include/__llvm-libc-common.h
index e0e29bbbd5f8..d9d70aff771c 100644
--- a/libc/include/__llvm-libc-common.h
+++ b/libc/include/__llvm-libc-common.h
@@ -52,8 +52,22 @@
 #undef __restrict
 #define __restrict restrict // C99 and above support the restrict keyword.
 
+#undef _Noreturn
+#if __STDC_VERSION__ >= 201112L
+// In C11 and later, _Noreturn is a keyword.
+#elif defined(__GNUC__)
+// GNU-compatible compilers have an equivalent attribute.
+#define _Noreturn __attribute__((__noreturn__))
+#else
+#define _Noreturn
+#endif
+
 #undef __NOEXCEPT
+#ifdef __GNUC__
+#define __NOEXCEPT __attribute__((__nothrow__))
+#else
 #define __NOEXCEPT
+#endif
 
 #endif // __cplusplus
 
diff --git a/libc/include/arpa/inet.yaml b/libc/include/arpa/inet.yaml
new file mode 100644
index 000000000000..cb366e0f5d69
--- /dev/null
+++ b/libc/include/arpa/inet.yaml
@@ -0,0 +1,30 @@
+header: arpa-inet.h
+macros: []
+types: []
+enums: []
+objects: []
+functions:
+  - name: htonl
+    standards:
+      - POSIX
+    return_type: uint32_t
+    arguments:
+      - type: uint32_t
+  - name: htons
+    standards:
+      - POSIX
+    return_type: uint16_t
+    arguments:
+      - type: uint16_t
+  - name: ntohl
+    standards:
+      - POSIX
+    return_type: uint32_t
+    arguments:
+      - type: uint32_t
+  - name: ntohs
+    standards:
+      - POSIX
+    return_type: uint16_t
+    arguments:
+      - type: uint16_t
diff --git a/libc/include/assert.yaml b/libc/include/assert.yaml
new file mode 100644
index 000000000000..f740554488ed
--- /dev/null
+++ b/libc/include/assert.yaml
@@ -0,0 +1,15 @@
+header: assert.h
+macros: []
+types: []
+enums: []
+objects: []
+functions:
+  - name: __assert_fail
+    standards:
+      - llvm_libc_ext
+    return_type: _Noreturn void
+    arguments:
+      - type: const char *
+      - type: const char *
+      - type: unsigned
+      - type: const char *
diff --git a/libc/include/complex.yaml b/libc/include/complex.yaml
new file mode 100644
index 000000000000..cd81de7dd9e2
--- /dev/null
+++ b/libc/include/complex.yaml
@@ -0,0 +1,137 @@
+header: complex.h
+macros: []
+types:
+  - type_name: cfloat16
+  - type_name: cfloat128
+  - type_name: float128
+enums: []
+objects: []
+functions:
+  - name: cimag
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: _Complex double
+  - name: cimagf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: _Complex float
+  - name: cimagl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: _Complex long double
+  - name: cimagf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: cfloat16
+    guard: LIBC_TYPES_HAS_CFLOAT16
+  - name: cimagf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: cfloat128
+    guard: LIBC_TYPES_HAS_CFLOAT128
+  - name: creal
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: _Complex double
+  - name: crealf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: _Complex float
+  - name: creall
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: _Complex long double
+  - name: crealf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: cfloat16
+    guard: LIBC_TYPES_HAS_CFLOAT16
+  - name: crealf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: cfloat128
+    guard: LIBC_TYPES_HAS_CFLOAT128
+  - name: conj
+    standards:
+      - stdc
+    return_type: _Complex double
+    arguments:
+      - type: _Complex double
+  - name: conjf
+    standards:
+      - stdc
+    return_type: _Complex float
+    arguments:
+      - type: _Complex float
+  - name: conjl
+    standards:
+      - stdc
+    return_type: _Complex long double
+    arguments:
+      - type: _Complex long double
+  - name: conjf16
+    standards:
+      - stdc
+    return_type: cfloat16
+    arguments:
+      - type: cfloat16
+    guard: LIBC_TYPES_HAS_CFLOAT16
+  - name: conjf128
+    standards:
+      - stdc
+    return_type: cfloat128
+    arguments:
+      - type: cfloat128
+    guard: LIBC_TYPES_HAS_CFLOAT128
+  - name: cproj
+    standards:
+      - stdc
+    return_type: _Complex double
+    arguments:
+      - type: _Complex double
+  - name: cprojf
+    standards:
+      - stdc
+    return_type: _Complex float
+    arguments:
+      - type: _Complex float
+  - name: cprojl
+    standards:
+      - stdc
+    return_type: _Complex long double
+    arguments:
+      - type: _Complex long double
+  - name: cprojf16
+    standards:
+      - stdc
+    return_type: cfloat16
+    arguments:
+      - type: cfloat16
+    guard: LIBC_TYPES_HAS_CFLOAT16
+  - name: cprojf128
+    standards:
+      - stdc
+    return_type: cfloat128
+    arguments:
+      - type: cfloat128
+    guard: LIBC_TYPES_HAS_CFLOAT128
diff --git a/libc/include/ctype.yaml b/libc/include/ctype.yaml
new file mode 100644
index 000000000000..b4823c3e5323
--- /dev/null
+++ b/libc/include/ctype.yaml
@@ -0,0 +1,201 @@
+header: ctype.h
+macros: []
+types:
+  - type_name: locale_t
+enums: []
+objects: []
+functions:
+  - name: isalnum
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isalpha
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isascii
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: isblank
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: iscntrl
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isdigit
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isgraph
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: islower
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isprint
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: ispunct
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isspace
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isupper
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isxdigit
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: toascii
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: int
+  - name: tolower
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: toupper
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: isalnum_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: isalpha_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: isblank_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: iscntrl_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: isdigit_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: isgraph_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: islower_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: isprint_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: ispunct_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: isspace_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: isupper_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: isxdigit_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: tolower_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
+  - name: toupper_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: locale_t
diff --git a/libc/include/dirent.yaml b/libc/include/dirent.yaml
new file mode 100644
index 000000000000..cdccf6a0c7f2
--- /dev/null
+++ b/libc/include/dirent.yaml
@@ -0,0 +1,46 @@
+header: dirent.h
+macros: []
+types:
+  - type_name: struct_dirent
+  - type_name: DIR
+  - type_name: ino_t
+enums: []
+objects: []
+functions:
+  - name: alphasort
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const struct dirent **
+      - type: const struct dirent **
+  - name: closedir
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: DIR *
+  - name: dirfd
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: DIR *
+  - name: fdopendir
+    standards:
+      - POSIX
+    return_type: DIR *
+    arguments:
+      - type: int
+  - name: opendir
+    standards:
+      - POSIX
+    return_type: DIR *
+    arguments:
+      - type: const char *
+  - name: readdir
+    standards:
+      - POSIX
+    return_type: struct dirent *
+    arguments:
+      - type: DIR *
diff --git a/libc/include/dlfcn.yaml b/libc/include/dlfcn.yaml
new file mode 100644
index 000000000000..725ee705714a
--- /dev/null
+++ b/libc/include/dlfcn.yaml
@@ -0,0 +1,39 @@
+header: dlfcn.h
+macros:
+  - macro_name: RTLD_LAZY
+    macro_value: null
+  - macro_name: RTLD_NOW
+    macro_value: null
+  - macro_name: RTLD_GLOBAL
+    macro_value: null
+  - macro_name: RTLD_LOCAL
+    macro_value: null
+types: []
+enums: []
+objects: []
+functions:
+  - name: dlclose
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void *
+  - name: dlerror
+    standards:
+      - POSIX
+    return_type: char *
+    arguments: []
+  - name: dlopen
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: const char *
+      - type: int
+  - name: dlsym
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: void *__restrict
+      - type: const char *__restrict
diff --git a/libc/include/elf.yaml b/libc/include/elf.yaml
new file mode 100644
index 000000000000..2e9db329e229
--- /dev/null
+++ b/libc/include/elf.yaml
@@ -0,0 +1,8 @@
+header: elf.h
+standards:
+  - Linux
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/errno.yaml b/libc/include/errno.yaml
new file mode 100644
index 000000000000..a894063a1ee2
--- /dev/null
+++ b/libc/include/errno.yaml
@@ -0,0 +1,10 @@
+header: errno.h
+standards:
+  - stdc
+  - Linux
+  - POSIX
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/fcntl.yaml b/libc/include/fcntl.yaml
new file mode 100644
index 000000000000..71c0df3b0fad
--- /dev/null
+++ b/libc/include/fcntl.yaml
@@ -0,0 +1,40 @@
+header: fcntl.h
+macros: []
+types:
+  - type_name: off_t
+  - type_name: mode_t
+enums: []
+objects: []
+functions:
+  - name: creat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: mode_t
+  - name: fcntl
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+      - type: '...'
+  - name: open
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: int
+      - type: '...'
+  - name: openat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const char *
+      - type: int
+      - type: '...'
diff --git a/libc/include/features.yaml b/libc/include/features.yaml
new file mode 100644
index 000000000000..a18af22edb74
--- /dev/null
+++ b/libc/include/features.yaml
@@ -0,0 +1,8 @@
+header: features.h
+standards:
+  - stdc
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/fenv.yaml b/libc/include/fenv.yaml
new file mode 100644
index 000000000000..1010efc6402c
--- /dev/null
+++ b/libc/include/fenv.yaml
@@ -0,0 +1,107 @@
+header: fenv.h
+macros: []
+types:
+  - type_name: fenv_t
+  - type_name: fexcept_t
+enums: []
+objects: []
+functions:
+  - name: feclearexcept
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: fedisableexcept
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: int
+    guard: null
+  - name: feenableexcept
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: int
+    attributes: []
+  - name: fegetenv
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: fenv_t *
+  - name: fegetexcept
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments: []
+  - name: fegetexceptflag
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: fexcept_t *
+      - type: int
+  - name: fegetround
+    standards:
+      - stdc
+    return_type: int
+    arguments: []
+  - name: feholdexcept
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: fenv_t *
+  - name: feraiseexcept
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: fesetenv
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const fenv_t *
+  - name: fesetexcept
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: fesetexceptflag
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const fexcept_t *
+      - type: int
+  - name: fesetround
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: fetestexcept
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: fetestexceptflag
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const fexcept_t *
+      - type: int
+  - name: feupdateenv
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const fenv_t *
diff --git a/libc/include/float.yaml b/libc/include/float.yaml
new file mode 100644
index 000000000000..63639a6e8ed1
--- /dev/null
+++ b/libc/include/float.yaml
@@ -0,0 +1,8 @@
+header: float.h
+standards:
+  - stdc
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/gpu/rpc.h.def b/libc/include/gpu/rpc.h.def
deleted file mode 100644
index 060650345e1f..000000000000
--- a/libc/include/gpu/rpc.h.def
+++ /dev/null
@@ -1,18 +0,0 @@
-//===-- GPU header rpc.h --------------------------------------------------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_LIBC_GPU_RPC_H
-#define LLVM_LIBC_GPU_RPC_H
-
-#include "__llvm-libc-common.h"
-
-#include "../llvm-libc-types/rpc_opcodes_t.h"
-
-%%public_api()
-
-#endif // LLVM_LIBC_GPU_RPC_H
diff --git a/libc/include/inttypes.yaml b/libc/include/inttypes.yaml
new file mode 100644
index 000000000000..ad636cc5121a
--- /dev/null
+++ b/libc/include/inttypes.yaml
@@ -0,0 +1,36 @@
+header: inttypes.h
+macros: []
+types:
+  - type_name: imaxdiv_t
+enums: []
+objects: []
+functions:
+  - name: imaxabs
+    standards:
+      - stdc
+    return_type: intmax_t
+    arguments:
+      - type: intmax_t
+  - name: imaxdiv
+    standards:
+      - stdc
+    return_type: imaxdiv_t
+    arguments:
+      - type: intmax_t
+      - type: intmax_t
+  - name: strtoimax
+    standards:
+      - stdc
+    return_type: intmax_t
+    arguments:
+      - type: const char *__restrict
+      - type: char * *__restrict
+      - type: int
+  - name: strtoumax
+    standards:
+      - stdc
+    return_type: uintmax_t
+    arguments:
+      - type: const char *__restrict
+      - type: char * *__restrict
+      - type: int
diff --git a/libc/include/limits.yaml b/libc/include/limits.yaml
new file mode 100644
index 000000000000..bf33ed24e7a8
--- /dev/null
+++ b/libc/include/limits.yaml
@@ -0,0 +1,8 @@
+header: limits.h
+standards:
+  - stdc
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/link.yaml b/libc/include/link.yaml
new file mode 100644
index 000000000000..d1963a86813a
--- /dev/null
+++ b/libc/include/link.yaml
@@ -0,0 +1,8 @@
+header: link.h
+standards:
+  - Linux
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/llvm-libc-macros/CMakeLists.txt b/libc/include/llvm-libc-macros/CMakeLists.txt
index 75194923a452..9d5d9f654428 100644
--- a/libc/include/llvm-libc-macros/CMakeLists.txt
+++ b/libc/include/llvm-libc-macros/CMakeLists.txt
@@ -315,3 +315,9 @@ add_macro_header(
   HDR
     locale-macros.h
 )
+
+add_macro_header(
+  pthread_macros
+  HDR
+    pthread-macros.h
+)
diff --git a/libc/include/llvm-libc-macros/pthread-macros.h b/libc/include/llvm-libc-macros/pthread-macros.h
new file mode 100644
index 000000000000..8a144dbd2e61
--- /dev/null
+++ b/libc/include/llvm-libc-macros/pthread-macros.h
@@ -0,0 +1,37 @@
+//===-- Definition of pthread macros --------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_MACROS_PTHREAD_MACRO_H
+#define LLVM_LIBC_MACROS_PTHREAD_MACRO_H
+
+#define PTHREAD_CREATE_JOINABLE 0
+#define PTHREAD_CREATE_DETACHED 1
+
+#define PTHREAD_MUTEX_NORMAL 0
+#define PTHREAD_MUTEX_ERRORCHECK 1
+#define PTHREAD_MUTEX_RECURSIVE 2
+#define PTHREAD_MUTEX_DEFAULT PTHREAD_MUTEX_NORMAL
+
+#define PTHREAD_MUTEX_STALLED 0
+#define PTHREAD_MUTEX_ROBUST 1
+
+#define PTHREAD_ONCE_INIT {0}
+
+#define PTHREAD_PROCESS_PRIVATE 0
+#define PTHREAD_PROCESS_SHARED 1
+
+#define PTHREAD_MUTEX_INITIALIZER {0}
+#define PTHREAD_RWLOCK_INITIALIZER {0}
+
+// glibc extensions
+#define PTHREAD_STACK_MIN (1 << 14) // 16KB
+#define PTHREAD_RWLOCK_PREFER_READER_NP 0
+#define PTHREAD_RWLOCK_PREFER_WRITER_NP 1
+#define PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP 2
+
+#endif // LLVM_LIBC_MACROS_PTHREAD_MACRO_H
diff --git a/libc/include/llvm-libc-macros/windows/CMakeLists.txt b/libc/include/llvm-libc-macros/windows/CMakeLists.txt
new file mode 100644
index 000000000000..48afc795178a
--- /dev/null
+++ b/libc/include/llvm-libc-macros/windows/CMakeLists.txt
@@ -0,0 +1,6 @@
+add_header(
+  time_macros_ext
+  HDR
+    time-macros-ext.h
+)
+
diff --git a/libc/include/llvm-libc-macros/windows/time-macros-ext.h b/libc/include/llvm-libc-macros/windows/time-macros-ext.h
new file mode 100644
index 000000000000..71d914b45187
--- /dev/null
+++ b/libc/include/llvm-libc-macros/windows/time-macros-ext.h
@@ -0,0 +1,17 @@
+//===-- Windows Time Macros Extension -------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_MACROS_WINDOWS_TIME_MACROS_EXT_H
+#define LLVM_LIBC_MACROS_WINDOWS_TIME_MACROS_EXT_H
+
+#define CLOCK_MONOTONIC 0
+#define CLOCK_REALTIME 1
+#define CLOCK_PROCESS_CPUTIME_ID 2
+#define CLOCK_THREAD_CPUTIME_ID 3
+
+#endif // LLVM_LIBC_MACROS_WINDOWS_TIME_MACROS_EXT_H
diff --git a/libc/include/llvm-libc-types/cfloat128.h b/libc/include/llvm-libc-types/cfloat128.h
index a371671cf623..f76a0c1c2f5a 100644
--- a/libc/include/llvm-libc-types/cfloat128.h
+++ b/libc/include/llvm-libc-types/cfloat128.h
@@ -35,6 +35,7 @@ typedef _Complex _Float128 cfloat128;
 typedef _Complex __float128 cfloat128;
 #elif (LDBL_MANT_DIG == 113)
 #define LIBC_TYPES_HAS_CFLOAT128
+#define LIBC_TYPES_CFLOAT128_IS_COMPLEX_LONG_DOUBLE
 typedef _Complex long double cfloat128;
 #endif
 
diff --git a/libc/include/locale.yaml b/libc/include/locale.yaml
new file mode 100644
index 000000000000..7da7966ea730
--- /dev/null
+++ b/libc/include/locale.yaml
@@ -0,0 +1,41 @@
+header: locale.h
+functions:
+  - name: localeconv
+    standards:
+      - stdc
+    return_type: struct lconv *
+    arguments:
+      - type: void
+  - name: duplocale
+    standards:
+      - stdc
+    return_type: locale_t
+    arguments:
+      - type: locale_t
+  - name: freelocale
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: locale_t
+  - name: newlocale
+    standards:
+      - stdc
+    return_type: locale_t
+    arguments:
+      - type: int
+      - type: const char *
+      - type: locale_t
+  - name: setlocale
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: int
+      - type: const char *
+  - name: uselocale
+    standards:
+      - stdc
+    return_type: locale_t
+    arguments:
+      - type: locale_t
diff --git a/libc/include/malloc.yaml b/libc/include/malloc.yaml
new file mode 100644
index 000000000000..8db4f3aebb9b
--- /dev/null
+++ b/libc/include/malloc.yaml
@@ -0,0 +1,13 @@
+header: malloc.h
+macros: []
+types: []
+enums: []
+objects: []
+functions:
+  - name: mallopt
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
diff --git a/libc/include/math.yaml b/libc/include/math.yaml
new file mode 100644
index 000000000000..3b8caec66bbf
--- /dev/null
+++ b/libc/include/math.yaml
@@ -0,0 +1,2629 @@
+header: math.h
+macros: []
+types:
+  - type_name: float_t
+  - type_name: double_t
+  - type_name: float128
+enums: []
+objects: []
+functions:
+  - name: acosf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: acoshf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: asin
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: asinf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: asinhf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: atan2
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: atan2f
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: atan2l
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: atanf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: atanhf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: canonicalize
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: double
+      - type: double
+  - name: canonicalizef
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: float
+      - type: float
+  - name: canonicalizef128
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: canonicalizef16
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: canonicalizel
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: long double
+      - type: long double
+  - name: cbrt
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: cbrtf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: ceil
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: ceilf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: ceilf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: ceilf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: ceill
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: copysign
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: copysignf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: copysignf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: copysignf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: copysignl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: cos
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: cosf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: cosf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: coshf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: cospif16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: coshf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: ddivl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: dmulf128
+    standards:
+      - llvm_libc_ext
+    return_type: double
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: dmull
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: dsqrtl
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: long double
+  - name: dsqrtf128
+    standards:
+      - llvm_libc_ext
+    return_type: double
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: erff
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: exp
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: exp10
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: exp10f
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: exp10m1f
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: exp10m1f16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: exp2
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: exp2f
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: exp2m1f
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: exp2m1f16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: expf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: expm1
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: expm1f
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: f16add
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: double
+      - type: double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16addf
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: float
+      - type: float
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16addf128
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT16_AND_FLOAT128
+  - name: f16addl
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: long double
+      - type: long double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16div
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: double
+      - type: double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16divf
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: float
+      - type: float
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16divf128
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT16_AND_FLOAT128
+  - name: f16divl
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: long double
+      - type: long double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16fma
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: double
+      - type: double
+      - type: double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16fmaf
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: float
+      - type: float
+      - type: float
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16fmaf128
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: float128
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT16_AND_FLOAT128
+  - name: f16fmal
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: long double
+      - type: long double
+      - type: long double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16mul
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: double
+      - type: double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16mulf
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: float
+      - type: float
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16mulf128
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT16_AND_FLOAT128
+  - name: f16mull
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: long double
+      - type: long double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16sqrt
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16sqrtf
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: float
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16sqrtf128
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT16_AND_FLOAT128
+  - name: f16sqrtl
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: long double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16sub
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: double
+      - type: double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16subf
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: float
+      - type: float
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: f16subf128
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT16_AND_FLOAT128
+  - name: f16subl
+    standards:
+      - llvm_libc_ext
+    return_type: _Float16
+    arguments:
+      - type: long double
+      - type: long double
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fabs
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: fabsf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: fabsf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fabsf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fabsl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: fadd
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: double
+      - type: double
+  - name: faddf128
+    standards:
+      - llvm_libc_ext
+    return_type: float
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: faddl
+    standards:
+      - faddl
+    return_type: float
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fdim
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fdimf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fdimf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fdimf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fdiml
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fdiv
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: double
+      - type: double
+  - name: fdivf128
+    standards:
+      - llvm_libc_ext
+    return_type: float
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fdivl
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: long double
+      - type: long double
+  - name: ffma
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: double
+      - type: double
+      - type: double
+  - name: ffmaf128
+    standards:
+      - llvm_libc_ext
+    return_type: float
+    arguments:
+      - type: float128
+      - type: float128
+      - type: float128
+    guards: LIBC_TYPES_HAS_FLOAT128
+  - name: ffmal
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: long double
+      - type: long double
+      - type: long double
+  - name: floor
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: floorf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: floorf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: floorf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: floorl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: fma
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+      - type: double
+  - name: fmaf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+      - type: float
+  - name: fmax
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fmaxf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fmaxf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fmaxf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fmaximum
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fmaximum_mag
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fmaximum_mag_num
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fmaximum_mag_numf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fmaximum_mag_numf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fmaximum_mag_numf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fmaximum_mag_numl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fmaximum_magf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fmaximum_magf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fmaximum_magf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fmaximum_magl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fmaximum_num
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fmaximum_numf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fmaximum_numf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fmaximum_numf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fmaximum_numl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fmaximumf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fmaximumf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fmaximumf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fmaximuml
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fmaxl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fmin
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fminf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fminf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fminf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fminimum
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fminimum_mag
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fminimum_mag_num
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fminimum_mag_numf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fminimum_mag_numf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fminimum_mag_numf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fminimum_mag_numl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fminimum_magf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fminimum_magf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fminimum_magf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fminimum_magl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fminimum_num
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fminimum_numf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fminimum_numf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fminimum_numf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fminimumf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fminimumf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fminimumf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fminimuml
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fminl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fmod
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: fmodf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: fmodf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fmodf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fmodl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: fmul
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: double
+      - type: double
+  - name: fmulf128
+    standards:
+      - llvm_libc_ext
+    return_type: float
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fmull
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: long double
+      - type: long double
+  - name: frexp
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: int *
+  - name: frexpf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: int *
+  - name: frexpf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: int *
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: frexpf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: int *
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: frexpl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: int *
+  - name: fromfp
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: int
+      - type: unsigned int
+  - name: fromfpf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: int
+      - type: unsigned int
+  - name: fromfpf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: int
+      - type: unsigned int
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fromfpf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: int
+      - type: unsigned int
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fromfpl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: int
+      - type: unsigned int
+  - name: fromfpx
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: int
+      - type: unsigned int
+  - name: fromfpxf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: int
+      - type: unsigned int
+  - name: fromfpxf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: int
+      - type: unsigned int
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fromfpxf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: int
+      - type: unsigned int
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: fromfpxl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: int
+      - type: unsigned int
+  - name: fsqrt
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: double
+  - name: fsqrtl
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: long double
+  - name: fsqrtf128
+    standards:
+      - llvm_libc_ext
+    return_type: float
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fsub
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: double
+      - type: double
+  - name: fsubf128
+    standards:
+      - llvm_libc_ext
+    return_type: float
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: fsubl
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: long double
+      - type: long double
+  - name: getpayload
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double *
+  - name: getpayloadf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float *
+  - name: getpayloadf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128 *
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: getpayloadf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16 *
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: getpayloadl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double *
+  - name: hypot
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: hypotf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: ilogb
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: double
+  - name: ilogbf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: float
+  - name: ilogbf128
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: ilogbf16
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: ilogbl
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: long double
+  - name: isnan
+    standards:
+      - BSDExtensions
+    return_type: int
+    arguments:
+      - type: double
+  - name: isnanf
+    standards:
+      - BSDExtensions
+    return_type: int
+    arguments:
+      - type: float
+  - name: isnanl
+    standards:
+      - BSDExtensions
+    return_type: int
+    arguments:
+      - type: long double
+  - name: ldexp
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: int
+  - name: ldexpf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: int
+  - name: ldexpf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: int
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: ldexpf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: int
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: ldexpl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: int
+  - name: lgamma
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: lgamma_r
+    standards:
+      - gnu
+    return_type: double
+    arguments:
+      - type: double
+      - type: int *
+  - name: lgammaf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: lgammaf_r
+    standards:
+      - gnu
+    return_type: float
+    arguments:
+      - type: float
+      - type: int *
+  - name: lgammal
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: lgammal_r
+    standards:
+      - gnu
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: int *
+  - name: llogb
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: double
+  - name: llogbf
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: float
+  - name: llogbf128
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: llogbf16
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: llogbl
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: long double
+  - name: llrint
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: double
+  - name: llrintf
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: float
+  - name: llrintf128
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: llrintf16
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: llrintl
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: long double
+  - name: llround
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: double
+  - name: llroundf
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: float
+  - name: llroundf128
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: llroundf16
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: llroundl
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: long double
+  - name: log
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: log10
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: log10f
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: log10f16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: log1p
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: log1pf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: log2
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: log2f
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: log2f16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: logb
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: logbf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: logbf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: logbf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: logbl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: logf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: logf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: lrint
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: double
+  - name: lrintf
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: float
+  - name: lrintf128
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: lrintf16
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: lrintl
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: long double
+  - name: lround
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: double
+  - name: lroundf
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: float
+  - name: lroundf128
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: lroundf16
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: lroundl
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: long double
+  - name: modf
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double *
+  - name: modff
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float *
+  - name: modff128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128 *
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: modff16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16 *
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: modfl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double *
+  - name: nan
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: const char *
+  - name: nanf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: const char *
+  - name: nanf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: const char *
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: nanf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: const char *
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: nanl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: const char *
+  - name: nearbyint
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: nearbyintf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: nearbyintf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: nearbyintf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: nearbyintl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: nextafter
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: nextafterf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: nextafterf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: nextafterf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: nextafterl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: nextdown
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: nextdownf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: nextdownf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: nextdownf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: nextdownl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: nexttoward
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: long double
+  - name: nexttowardf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: long double
+  - name: nexttowardf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: nexttowardl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: nextup
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: nextupf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: nextupf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: nextupf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: nextupl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: pow
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: powf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: powi
+    standards: llvm_libc_ext
+    return_type: double
+    arguments:
+      - type: double
+      - type: int
+  - name: powif
+    standards: llvm_libc_ext
+    return_type: float
+    arguments:
+      - type: float
+      - type: int
+  - name: remainder
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+  - name: remainderf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+  - name: remainderf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: remainderf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: remainderl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+  - name: remquo
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: double
+      - type: int *
+  - name: remquof
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: float
+      - type: int *
+  - name: remquof128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: float128
+      - type: int *
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: remquof16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: _Float16
+      - type: int *
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: remquol
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long double
+      - type: int *
+  - name: rint
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: rintf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: rintf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: rintf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: rintl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: round
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: roundeven
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: roundevenf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: roundevenf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: roundevenf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: roundevenl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: roundf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: roundf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: roundf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: roundl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: scalbln
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: long
+  - name: scalblnf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: long
+  - name: scalblnf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: long
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: scalblnf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: long
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: scalblnf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: long
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: scalblnl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: long
+  - name: scalbn
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: int
+  - name: scalbnf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: int
+  - name: scalbnf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: int
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: scalbnf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: int
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: scalbnl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: int
+  - name: setpayload
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: double *
+      - type: double
+  - name: setpayloadf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: float *
+      - type: float
+  - name: setpayloadf128
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: float128 *
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: setpayloadf16
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: _Float16 *
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: setpayloadl
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: long double *
+      - type: long double
+  - name: setpayloadsig
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double *
+      - type: double
+  - name: setpayloadsigf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: float *
+      - type: float
+  - name: setpayloadsigf128
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: float128 *
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: setpayloadsigf16
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: _Float16 *
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: setpayloadsigl
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: long double *
+      - type: long double
+  - name: sin
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: sincosf
+    standards:
+      - gnu
+    return_type: void
+    arguments:
+      - type: float
+      - type: float *
+      - type: float *
+  - name: sinf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: sinf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: sinhf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: sinhf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: sinpif16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: sqrt
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: sqrtf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: sqrtf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: sqrtf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: sqrtl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: tan
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: tanf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: tanhf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: tanhf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: tanpif16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: totalorder
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const double *
+      - type: const double *
+  - name: totalorderf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const float *
+      - type: const float *
+  - name: totalorderf128
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const float128 *
+      - type: const float128 *
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: totalorderf16
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const _Float16 *
+      - type: const _Float16 *
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: totalorderl
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const long double *
+      - type: const long double *
+  - name: totalordermag
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const double *
+      - type: const double *
+  - name: totalordermagf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const float *
+      - type: const float *
+  - name: totalordermagl
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const long double *
+      - type: const long double *
+  - name: totalordermagf128
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const float128 *
+      - type: const float128 *
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: totalordermagf16
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const _Float16 *
+      - type: const _Float16 *
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: trunc
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+  - name: truncf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+  - name: truncf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: truncf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: truncl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+  - name: ufromfp
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: int
+      - type: unsigned int
+  - name: ufromfpf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: int
+      - type: unsigned int
+  - name: ufromfpf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: int
+      - type: unsigned int
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: ufromfpf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: int
+      - type: unsigned int
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: ufromfpl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: int
+      - type: unsigned int
+  - name: ufromfpx
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: double
+      - type: int
+      - type: unsigned int
+  - name: ufromfpxf
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: float
+      - type: int
+      - type: unsigned int
+  - name: ufromfpxf128
+    standards:
+      - stdc
+    return_type: float128
+    arguments:
+      - type: float128
+      - type: int
+      - type: unsigned int
+    guard: LIBC_TYPES_HAS_FLOAT128
+  - name: ufromfpxf16
+    standards:
+      - stdc
+    return_type: _Float16
+    arguments:
+      - type: _Float16
+      - type: int
+      - type: unsigned int
+    guard: LIBC_TYPES_HAS_FLOAT16
+  - name: ufromfpxl
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: long double
+      - type: int
+      - type: unsigned int
diff --git a/libc/include/pthread.h.def b/libc/include/pthread.h.def
index 4dbeed6b5f32..aa1e9983e4bb 100644
--- a/libc/include/pthread.h.def
+++ b/libc/include/pthread.h.def
@@ -10,39 +10,7 @@
 #define LLVM_LIBC_PTHREAD_H
 
 #include "__llvm-libc-common.h"
-
-// TODO: move to a pthreads-macros.h file:
-// https://github.com/llvm/llvm-project/issues/88997
-
-#define PTHREAD_STACK_MIN (1 << 14) // 16KB
-
-#define PTHREAD_MUTEX_INITIALIZER {0}
-#define PTHREAD_RWLOCK_INITIALIZER {}
-#define PTHREAD_ONCE_INIT {0}
-
-enum {
-  PTHREAD_CREATE_JOINABLE = 0x0,
-  PTHREAD_CREATE_DETACHED = 0x1,
-
-  PTHREAD_MUTEX_NORMAL = 0x0,
-  PTHREAD_MUTEX_ERRORCHECK = 0x1,
-  PTHREAD_MUTEX_RECURSIVE = 0x2,
-  PTHREAD_MUTEX_DEFAULT = PTHREAD_MUTEX_NORMAL,
-
-  PTHREAD_PROCESS_PRIVATE = 0x0,
-  PTHREAD_PROCESS_SHARED = 0x1,
-
-  PTHREAD_MUTEX_STALLED = 0x0,
-  PTHREAD_MUTEX_ROBUST = 0x1,
-};
-
-#define PTHREAD_PROCESS_PRIVATE 0
-#define PTHREAD_PROCESS_SHARED 1
-
-#define PTHREAD_RWLOCK_PREFER_READER_NP 0
-#define PTHREAD_RWLOCK_PREFER_WRITER_NP 1
-#define PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP 2
-
+#include "llvm-libc-macros/pthread-macros.h"
 
 %%public_api()
 
diff --git a/libc/include/pthread.yaml b/libc/include/pthread.yaml
new file mode 100644
index 000000000000..b9068c3f1765
--- /dev/null
+++ b/libc/include/pthread.yaml
@@ -0,0 +1,433 @@
+header: pthread.h
+macros: []
+types:
+  - type_name: pthread_t
+  - type_name: pthread_once_t
+  - type_name: pthread_mutex_t
+  - type_name: pthread_mutexattr_t
+  - type_name: pthread_key_t
+  - type_name: pthread_condattr_t
+  - type_name: __pthread_tss_dtor_t
+  - type_name: pthread_rwlock_t
+  - type_name: pthread_rwlockattr_t
+  - type_name: pthread_attr_t
+  - type_name: __pthread_start_t
+  - type_name: __pthread_once_func_t
+  - type_name: __atfork_callback_t
+  - type_name: pthread_spinlock_t
+enums: []
+functions:
+  - name: pthread_atfork
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: __atfork_callback_t
+      - type: __atfork_callback_t
+      - type: __atfork_callback_t
+  - name: pthread_attr_destroy
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_attr_t *
+  - name: pthread_attr_getdetachstate
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_attr_t *
+      - type: int *
+  - name: pthread_attr_getguardsize
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_attr_t *__restrict
+      - type: size_t *__restrict
+  - name: pthread_attr_getstack
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_attr_t *__restrict
+      - type: void **__restrict
+      - type: size_t *__restrict
+  - name: pthread_attr_getstacksize
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_attr_t *__restrict
+      - type: size_t *__restrict
+  - name: pthread_attr_init
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_attr_t *
+  - name: pthread_attr_setdetachstate
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_attr_t *
+      - type: int
+  - name: pthread_attr_setguardsize
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_attr_t *
+      - type: size_t
+  - name: pthread_attr_setstack
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_attr_t *
+      - type: void *
+      - type: size_t
+  - name: pthread_attr_setstacksize
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_attr_t *
+      - type: size_t
+  - name: pthread_condattr_destroy
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_condattr_t *
+  - name: pthread_condattr_getclock
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_condattr_t *__restrict
+      - type: clockid_t *__restrict
+  - name: pthread_condattr_getpshared
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_condattr_t *__restrict
+      - type: int *__restrict
+  - name: pthread_condattr_init
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_condattr_t *
+  - name: pthread_condattr_setclock
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_condattr_t *
+      - type: clockid_t
+  - name: pthread_condattr_setpshared
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_condattr_t *
+      - type: int
+  - name: pthread_create
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_t *__restrict
+      - type: const pthread_attr_t *__restrict
+      - type: __pthread_start_t
+      - type: void *
+  - name: pthread_detach
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_t
+  - name: pthread_equal
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_t
+      - type: pthread_t
+  - name: pthread_exit
+    standards:
+      - POSIX
+    return_type: _Noreturn void
+    arguments:
+      - type: void *
+  - name: pthread_getname_np
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: pthread_t
+      - type: char *
+      - type: size_t
+  - name: pthread_getspecific
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: pthread_key_t
+  - name: pthread_join
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_t
+      - type: void **
+  - name: pthread_key_create
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_key_t *
+      - type: __pthread_tss_dtor_t
+  - name: pthread_key_delete
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_key_t
+  - name: pthread_mutex_destroy
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutex_t *
+  - name: pthread_mutex_init
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutex_t *__restrict
+      - type: const pthread_mutexattr_t *__restrict
+  - name: pthread_mutex_lock
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutex_t *
+  - name: pthread_mutex_unlock
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutex_t *
+  - name: pthread_mutexattr_destroy
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutexattr_t *
+  - name: pthread_mutexattr_getpshared
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_mutexattr_t *__restrict
+      - type: int *__restrict
+  - name: pthread_mutexattr_getrobust
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_mutexattr_t *__restrict
+      - type: int *__restrict
+  - name: pthread_mutexattr_gettype
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_mutexattr_t *__restrict
+      - type: int *__restrict
+  - name: pthread_mutexattr_init
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutexattr_t *
+  - name: pthread_mutexattr_setpshared
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutexattr_t *__restrict
+      - type: int
+  - name: pthread_mutexattr_setrobust
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutexattr_t *__restrict
+      - type: int
+  - name: pthread_mutexattr_settype
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_mutexattr_t *__restrict
+      - type: int
+  - name: pthread_once
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_once_t *
+      - type: __pthread_once_func_t
+  - name: pthread_rwlock_clockrdlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *__restrict
+      - type: clockid_t
+      - type: const struct timespec *__restrict
+  - name: pthread_rwlock_clockwrlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *__restrict
+      - type: clockid_t
+      - type: const struct timespec *__restrict
+  - name: pthread_rwlock_destroy
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *
+  - name: pthread_rwlock_init
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *
+      - type: const pthread_rwlockattr_t *__restrict
+  - name: pthread_rwlock_rdlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *
+  - name: pthread_rwlock_timedrdlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *__restrict
+      - type: const struct timespec *__restrict
+  - name: pthread_rwlock_timedwrlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *__restrict
+      - type: const struct timespec *__restrict
+  - name: pthread_rwlock_tryrdlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *
+  - name: pthread_rwlock_trywrlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *
+  - name: pthread_rwlock_unlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *
+  - name: pthread_rwlock_wrlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlock_t *
+  - name: pthread_rwlockattr_destroy
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlockattr_t *
+  - name: pthread_rwlockattr_getkind_np
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlockattr_t *
+      - type: int *
+  - name: pthread_rwlockattr_getpshared
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const pthread_rwlockattr_t *
+      - type: int *
+  - name: pthread_rwlockattr_init
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlockattr_t *
+  - name: pthread_rwlockattr_setkind_np
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlockattr_t *
+      - type: int
+  - name: pthread_rwlockattr_setpshared
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pthread_rwlockattr_t *
+      - type: int
+  - name: pthread_self
+    standards:
+      - POSIX
+    return_type: pthread_t
+    arguments:
+      - type: void
+  - name: pthread_setname_np
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: pthread_t
+      - type: const char *
+  - name: pthread_setspecific
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: pthread_key_t
+      - type: const void *
+  - name: pthread_spin_destroy
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_spinlock_t *
+  - name: pthread_spin_init
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_spinlock_t *
+      - type: int
+  - name: pthread_spin_lock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_spinlock_t *
+  - name: pthread_spin_trylock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_spinlock_t *
+  - name: pthread_spin_unlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: pthread_spinlock_t *
diff --git a/libc/include/sched.yaml b/libc/include/sched.yaml
new file mode 100644
index 000000000000..2d4876b722ab
--- /dev/null
+++ b/libc/include/sched.yaml
@@ -0,0 +1,88 @@
+header: sched.h
+macros: []
+types:
+  - type_name: struct_timespec
+  - type_name: time_t
+  - type_name: struct_sched_param
+  - type_name: size_t
+  - type_name: cpu_set_t
+  - type_name: pid_t
+enums: []
+objects: []
+functions:
+  - name: __sched_getcpucount
+    standards:
+      - llvm_libc_ext
+    return_type: int
+    arguments:
+      - type: size_t
+      - type: const cpu_set_t *
+  - name: sched_get_priority_max
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: sched_get_priority_min
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: sched_getaffinity
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: pid_t
+      - type: size_t
+      - type: cpu_set_t *
+  - name: sched_getparam
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pid_t
+      - type: struct sched_param *
+  - name: sched_getscheduler
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pid_t
+      - type: int
+      - type: const struct sched_param *
+  - name: sched_rr_get_interval
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pid_t
+      - type: struct timespec *
+  - name: sched_setaffinity
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: pid_t
+      - type: size_t
+      - type: const cpu_set_t *
+  - name: sched_setparam
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pid_t
+      - type: const struct sched_param *
+  - name: sched_setscheduler
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pid_t
+  - name: sched_yield
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void
diff --git a/libc/include/search.yaml b/libc/include/search.yaml
new file mode 100644
index 000000000000..a0c73bc679d8
--- /dev/null
+++ b/libc/include/search.yaml
@@ -0,0 +1,70 @@
+header: search.h
+macros: []
+types:
+  - type_name: struct_hsearch_data
+  - type_name: ENTRY
+  - type_name: ACTION
+  - type_name: __lsearchcompare_t
+enums: []
+objects: []
+functions:
+  - name: hcreate
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: size_t
+  - name: hcreate_r
+    standards: GNUExtensions
+    return_type: int
+    arguments:
+      - type: size_t
+      - type: struct hsearch_data *
+  - name: hdestroy
+    standards: GNUExtensions
+    return_type: void
+    arguments: []
+  - name: hdestroy_r
+    standards:
+      - POSIX
+    return_type: void
+    arguments:
+      - type: struct hsearch_data *
+  - name: hsearch
+    standards:
+      - POSIX
+    return_type: ENTRY *
+    arguments:
+      - type: ENTRY
+      - type: ACTION
+  - name: hsearch_r
+    standards: GNUExtensions
+    return_type: int
+    arguments:
+      - type: ENTRY
+      - type: ACTION
+      - type: ENTRY * *
+      - type: struct hsearch_data *
+  - name: insque
+    standards:
+      - POSIX
+    return_type: void
+    arguments:
+      - type: void *
+      - type: void *
+  - name: remque
+    standards:
+      - POSIX
+    return_type: void
+    arguments:
+      - type: void *
+  - name: lfind
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: const void *
+      - type: const void *
+      - type: size_t *
+      - type: size_t
+      - type: __lsearchcompare_t
diff --git a/libc/include/setjmp.yaml b/libc/include/setjmp.yaml
new file mode 100644
index 000000000000..68e3ff046e4b
--- /dev/null
+++ b/libc/include/setjmp.yaml
@@ -0,0 +1,20 @@
+header: setjmp.h
+macros: []
+types:
+  - type_name: jmp_buf
+enums: []
+objects: []
+functions:
+  - name: longjmp
+    standards:
+      - stdc
+    return_type: _Noreturn void
+    arguments:
+      - type: jmp_buf
+      - type: int
+  - name: setjmp
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: jmp_buf
diff --git a/libc/include/signal.yaml b/libc/include/signal.yaml
new file mode 100644
index 000000000000..c66abb1a8744
--- /dev/null
+++ b/libc/include/signal.yaml
@@ -0,0 +1,82 @@
+header: signal.h
+macros: []
+types:
+  - type_name: pid_t
+  - type_name: stack_t
+  - type_name: siginfo_t
+  - type_name: struct_sigaction
+  - type_name: sigset_t
+  - type_name: union_sigval
+  - type_name: sig_atomic_t
+enums: []
+objects: []
+functions:
+  - name: kill
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pid_t
+      - type: int
+  - name: raise
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: sigaction
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const struct sigaction *__restrict
+      - type: struct sigaction *__restrict
+  - name: sigaddset
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: sigset_t *
+      - type: int
+  - name: sigaltstack
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const stack_t *__restrict
+      - type: stack_t *__restrict
+  - name: sigdelset
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: sigset_t *
+      - type: int
+  - name: sigemptyset
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: sigset_t *
+  - name: sigfillset
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: sigset_t *
+  - name: signal
+    standards:
+      - stdc
+    return_type: __sighandler_t
+    arguments:
+      - type: int
+      - type: __sighandler_t
+  - name: sigprocmask
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const sigset_t *__restrict
+      - type: sigset_t *__restrict
diff --git a/libc/include/spawn.yaml b/libc/include/spawn.yaml
new file mode 100644
index 000000000000..be3f4e99d27f
--- /dev/null
+++ b/libc/include/spawn.yaml
@@ -0,0 +1,58 @@
+header: spawn.h
+macros: []
+types:
+  - type_name: posix_spawn_file_actions_t
+  - type_name: posix_spawnattr_t
+  - type_name: pid_t
+  - type_name: mode_t
+enums: []
+objects: []
+functions:
+  - name: posix_spawn
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: pid_t *__restrict
+      - type: const char *__restrict
+      - type: posix_spawn_file_actions_t *
+      - type: posix_spawnattr_t *__restrict
+      - type: const char *__restrict *
+      - type: const char *__restrict *
+  - name: posix_spawn_file_actions_addclose
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: posix_spawn_file_actions_t *
+      - type: int
+  - name: posix_spawn_file_actions_adddup2
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: posix_spawn_file_actions_t *
+      - type: int
+      - type: int
+  - name: posix_spawn_file_actions_addopen
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: posix_spawn_file_actions_t *__restrict
+      - type: int
+      - type: const char *__restrict
+      - type: int
+      - type: mode_t
+  - name: posix_spawn_file_actions_destroy
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: posix_spawn_file_actions_t *
+  - name: posix_spawn_file_actions_init
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: posix_spawn_file_actions_t *
diff --git a/libc/include/stdbit.yaml b/libc/include/stdbit.yaml
new file mode 100644
index 000000000000..25d2d326c30e
--- /dev/null
+++ b/libc/include/stdbit.yaml
@@ -0,0 +1,396 @@
+header: stdbit.h
+macros: []
+types: []
+enums: []
+objects: []
+functions:
+  - name: stdc_bit_ceil_uc
+    standards:
+      - stdc
+    return_type: unsigned char
+    arguments:
+      - type: unsigned char
+  - name: stdc_bit_ceil_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_bit_ceil_ul
+    standards:
+      - stdc
+    return_type: unsigned long
+    arguments:
+      - type: unsigned long
+  - name: stdc_bit_ceil_ull
+    standards:
+      - stdc
+    return_type: unsigned long long
+    arguments:
+      - type: unsigned long long
+  - name: stdc_bit_ceil_us
+    standards:
+      - stdc
+    return_type: unsigned short
+    arguments:
+      - type: unsigned short
+  - name: stdc_bit_floor_uc
+    standards:
+      - stdc
+    return_type: unsigned char
+    arguments:
+      - type: unsigned char
+  - name: stdc_bit_floor_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_bit_floor_ul
+    standards:
+      - stdc
+    return_type: unsigned long
+    arguments:
+      - type: unsigned long
+  - name: stdc_bit_floor_ull
+    standards:
+      - stdc
+    return_type: unsigned long long
+    arguments:
+      - type: unsigned long long
+  - name: stdc_bit_floor_us
+    standards:
+      - stdc
+    return_type: unsigned short
+    arguments:
+      - type: unsigned short
+  - name: stdc_bit_width_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_bit_width_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_bit_width_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_bit_width_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_bit_width_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_count_ones_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_count_ones_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_count_ones_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_count_ones_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_count_ones_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_count_zeros_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_count_zeros_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_count_zeros_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_count_zeros_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_count_zeros_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_first_leading_one_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_first_leading_one_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_first_leading_one_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_first_leading_one_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_first_leading_one_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_first_leading_zero_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_first_leading_zero_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_first_leading_zero_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_first_leading_zero_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_first_leading_zero_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_first_trailing_one_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_first_trailing_one_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_first_trailing_one_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_first_trailing_one_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_first_trailing_one_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_has_single_bit_uc
+    standards:
+      - stdc
+    return_type: bool
+    arguments:
+      - type: unsigned char
+  - name: stdc_has_single_bit_ui
+    standards:
+      - stdc
+    return_type: bool
+    arguments:
+      - type: unsigned int
+  - name: stdc_has_single_bit_ul
+    standards:
+      - stdc
+    return_type: bool
+    arguments:
+      - type: unsigned long
+  - name: stdc_has_single_bit_ull
+    standards:
+      - stdc
+    return_type: bool
+    arguments:
+      - type: unsigned long long
+  - name: stdc_has_single_bit_us
+    standards:
+      - stdc
+    return_type: bool
+    arguments:
+      - type: unsigned short
+  - name: stdc_leading_ones_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_leading_ones_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_leading_ones_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_leading_ones_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_leading_ones_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_leading_zeros_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_leading_zeros_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_leading_zeros_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_leading_zeros_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_leading_zeros_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_trailing_ones_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_trailing_ones_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_trailing_ones_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_trailing_ones_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_trailing_ones_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
+  - name: stdc_trailing_zeros_uc
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned char
+  - name: stdc_trailing_zeros_ui
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned int
+  - name: stdc_trailing_zeros_ul
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long
+  - name: stdc_trailing_zeros_ull
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned long long
+  - name: stdc_trailing_zeros_us
+    standards:
+      - stdc
+    return_type: unsigned int
+    arguments:
+      - type: unsigned short
diff --git a/libc/include/stdckdint.yaml b/libc/include/stdckdint.yaml
new file mode 100644
index 000000000000..ea8fc47625b0
--- /dev/null
+++ b/libc/include/stdckdint.yaml
@@ -0,0 +1,8 @@
+header: stdckdint.h
+standards:
+  - stdc
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/stdfix.yaml b/libc/include/stdfix.yaml
new file mode 100644
index 000000000000..9787eaba45e4
--- /dev/null
+++ b/libc/include/stdfix.yaml
@@ -0,0 +1,307 @@
+header: stdfix.h
+macros: []
+types: 
+  - type_name: stdfix-types
+enums: []
+objects: []
+functions:
+  - name: abshk
+    standards:
+      - stdc_ext
+    return_type: short accum
+    arguments:
+      - type: short accum
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: abshr
+    standards:
+      - stdc_ext
+    return_type: short fract
+    arguments:
+      - type: short fract
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: absk
+    standards:
+      - stdc_ext
+    return_type: accum
+    arguments:
+      - type: accum
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: abslk
+    standards:
+      - stdc_ext
+    return_type: long accum
+    arguments:
+      - type: long accum
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: abslr
+    standards:
+      - stdc_ext
+    return_type: long fract
+    arguments:
+      - type: long fract
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: absr
+    standards:
+      - stdc_ext
+    return_type: fract
+    arguments:
+      - type: fract
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: exphk
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: short accum
+    arguments:
+      - type: short accum
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: expk
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: accum
+    arguments:
+      - type: accum
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: hrbits
+    standards:
+      - stdc_ext
+    return_type: short fract
+    arguments:
+      - type: int_hr_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: uhrbits
+    standards:
+      - stdc_ext
+    return_type: unsigned short fract
+    arguments:
+      - type: uint_uhr_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: rbits
+    standards:
+      - stdc_ext
+    return_type: fract
+    arguments:
+      - type: int_r_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: urbits
+    standards:
+      - stdc_ext
+    return_type: unsigned fract
+    arguments:
+      - type: uint_ur_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: lrbits
+    standards:
+      - stdc_ext
+    return_type: long fract
+    arguments:
+      - type: int_lr_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: ulrbits
+    standards:
+      - stdc_ext
+    return_type: unsigned long fract
+    arguments:
+      - type: uint_ulr_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: hkbits
+    standards:
+      - stdc_ext
+    return_type: short accum
+    arguments:
+      - type: int_hk_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: uhkbits
+    standards:
+      - stdc_ext
+    return_type: unsigned short accum
+    arguments:
+      - type: uint_uhk_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: kbits
+    standards:
+      - stdc_ext
+    return_type: accum
+    arguments:
+      - type: int_k_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: ukbits
+    standards:
+      - stdc_ext
+    return_type: unsigned accum
+    arguments:
+      - type: uint_uk_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: lkbits
+    standards:
+      - stdc_ext
+    return_type: long accum
+    arguments:
+      - type: uint_ulr_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: ulkbits
+    standards:
+      - stdc_ext
+    return_type: unsigned long accum
+    arguments:
+      - type: uint_ulk_t
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundhk
+    standards:
+      - stdc_ext
+    return_type: short accum
+    arguments:
+      - type: short accum
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundhr
+    standards:
+      - stdc_ext
+    return_type: short fract
+    arguments:
+      - type: short fract
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundk
+    standards:
+      - stdc_ext
+    return_type: accum
+    arguments:
+      - type: accum
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundlk
+    standards:
+      - stdc_ext
+    return_type: long accum
+    arguments:
+      - type: long accum
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundlr
+    standards:
+      - stdc_ext
+    return_type: long fract
+    arguments:
+      - type: long fract
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundr
+    standards:
+      - stdc_ext
+    return_type: fract
+    arguments:
+      - type: fract
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: rounduhk
+    standards:
+      - stdc_ext
+    return_type: unsigned short accum
+    arguments:
+      - type: unsigned short accum
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: rounduhr
+    standards:
+      - stdc_ext
+    return_type: unsigned short fract
+    arguments:
+      - type: unsigned short fract
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: rounduk
+    standards:
+      - stdc_ext
+    return_type: unsigned accum
+    arguments:
+      - type: unsigned accum
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundulk
+    standards:
+      - stdc_ext
+    return_type: unsigned long accum
+    arguments:
+      - type: unsigned long accum
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundulr
+    standards:
+      - stdc_ext
+    return_type: unsigned long fract
+    arguments:
+      - type: unsigned long fract
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: roundur
+    standards:
+      - stdc_ext
+    return_type: unsigned fract
+    arguments:
+      - type: unsigned fract
+      - type: int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: sqrtuhk
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: unsigned short accum
+    arguments:
+      - type: unsigned short accum
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: sqrtuhr
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: unsigned short fract
+    arguments:
+      - type: unsigned short fract
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: sqrtuk
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: unsigned accum
+    arguments:
+      - type: unsigned accum
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: sqrtulk
+    standards: llvm_libc_stdfix_ext
+    return_type: unsigned long accum
+    arguments:
+      - type: unsigned long accum
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: sqrtulr
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: unsigned long fract
+    arguments:
+      - type: unsigned long fract
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: sqrtur
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: unsigned fract
+    arguments:
+      - type: unsigned fract
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: uhksqrtus
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: unsigned short accum
+    arguments:
+      - type: unsigned short
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
+  - name: uksqrtui
+    standards:
+      - stdc_ext
+      - llvm_libc_stdfix_ext
+    return_type: unsigned accum
+    arguments:
+      - type: unsigned int
+    guard: LIBC_COMPILER_HAS_FIXED_POINT
diff --git a/libc/include/stdint.yaml b/libc/include/stdint.yaml
new file mode 100644
index 000000000000..8887f596bc8a
--- /dev/null
+++ b/libc/include/stdint.yaml
@@ -0,0 +1,8 @@
+header: stdint.h
+standards:
+  - stdc
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/stdio.yaml b/libc/include/stdio.yaml
new file mode 100644
index 000000000000..fd116bbc0089
--- /dev/null
+++ b/libc/include/stdio.yaml
@@ -0,0 +1,397 @@
+header: stdio.h
+macros:
+  - macro_name: stdout
+    macro_value: stdout
+  - macro_name: stdin
+    macro_value: stdin
+  - macro_name: stderr
+    macro_value: stderr
+types:
+  - type_name: size_t
+  - type_name: off_t
+  - type_name: cookie_io_functions_t
+  - type_name: FILE
+enums: []
+objects:
+  - object_name: stdin
+    object_type: FILE *
+  - object_name: stdout
+    object_type: FILE *
+  - object_name: stderr
+    object_type: FILE *
+functions:
+  - name: asprintf
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: char **__restrict
+      - type: const char *__restrict
+      - type: '...'
+  - name: clearerr
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: FILE *
+  - name: clearerr_unlocked
+    standards:
+      - GNUExtensions
+    return_type: void
+    arguments:
+      - type: FILE *
+  - name: fclose
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: fdopen
+    standards:
+      - POSIX
+    return_type: FILE *
+    arguments:
+      - type: int
+      - type: const char *
+  - name: feof
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: feof_unlocked
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: ferror
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: ferror_unlocked
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: fflush
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: fgetc
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: fgetc_unlocked
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: fgets
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: char *__restrict
+      - type: int
+      - type: FILE *__restrict
+  - name: fileno
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: flockfile
+    standards:
+      - POSIX
+    return_type: void
+    arguments:
+      - type: FILE *
+  - name: fopen
+    standards:
+      - stdc
+    return_type: FILE *
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: fopencookie
+    standards:
+      - GNUExtensions
+    return_type: FILE *
+    arguments:
+      - type: void *
+      - type: const char *
+      - type: cookie_io_functions_t
+  - name: fprintf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *__restrict
+      - type: const char *__restrict
+      - type: '...'
+  - name: fputc
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: FILE *
+  - name: fputs
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: FILE *__restrict
+  - name: fread
+    standards:
+      - stdc
+    return_type: size_t
+    arguments:
+      - type: void *__restrict
+      - type: size_t
+      - type: size_t
+      - type: FILE *__restrict
+  - name: fread_unlocked
+    standards:
+      - GNUExtensions
+    return_type: size_t
+    arguments:
+      - type: void *__restrict
+      - type: size_t
+      - type: size_t
+      - type: FILE *__restrict
+  - name: fscanf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *__restrict
+      - type: const char *__restrict
+      - type: '...'
+  - name: vfscanf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *__restrict
+      - type: const char *__restrict
+      - type: va_list
+  - name: fseek
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *
+      - type: long
+      - type: int
+  - name: ftell
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: FILE *
+  - name: funlockfile
+    standards:
+      - POSIX
+    return_type: void
+    arguments:
+      - type: FILE *
+  - name: fwrite
+    standards:
+      - stdc
+    return_type: size_t
+    arguments:
+      - type: const void *__restrict
+      - type: size_t
+      - type: size_t
+      - type: FILE *__restrict
+  - name: fwrite_unlocked
+    standards:
+      - GNUExtensions
+    return_type: size_t
+    arguments:
+      - type: const void *__restrict
+      - type: size_t
+      - type: size_t
+      - type: FILE *__restrict
+  - name: getc
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: getc_unlocked
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: FILE *
+  - name: getchar
+    standards:
+      - stdc
+    return_type: int
+    arguments: []
+  - name: getchar_unlocked
+    standards:
+      - POSIX
+    return_type: int
+    arguments: []
+  - name: printf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: '...'
+  - name: putc
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: FILE *
+  - name: putchar
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: puts
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
+  - name: remove
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
+  - name: rename
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: scanf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: '...'
+  - name: vscanf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: va_list
+  - name: setbuf
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: FILE *__restrict
+      - type: char *__restrict
+  - name: setvbuf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *__restrict
+      - type: char *__restrict
+      - type: int
+      - type: size_t
+  - name: snprintf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: char *__restrict
+      - type: size_t
+      - type: const char *__restrict
+      - type: '...'
+  - name: sprintf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: '...'
+  - name: sscanf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: const char *__restrict
+      - type: '...'
+  - name: ungetc
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+      - type: FILE *
+  - name: vasprintf
+    standards:
+      - GNUExtensions
+    return_type: int
+    arguments:
+      - type: char **__restrict
+      - type: const char *__restrict
+      - type: va_list
+  - name: vfprintf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: FILE *__restrict
+      - type: const char *__restrict
+      - type: va_list
+  - name: vprintf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: va_list
+  - name: vsnprintf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: char *__restrict
+      - type: size_t
+      - type: const char *__restrict
+      - type: va_list
+  - name: vsprintf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: va_list
+  - name: vsscanf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: const char *__restrict
+      - type: va_list
diff --git a/libc/include/stdlib.yaml b/libc/include/stdlib.yaml
new file mode 100644
index 000000000000..c6c95e421cee
--- /dev/null
+++ b/libc/include/stdlib.yaml
@@ -0,0 +1,341 @@
+header: stdlib.h
+standards:
+  - stdc
+macros: []
+types:
+  - type_name: __atexithandler_t
+  - type_name: __qsortrcompare_t
+  - type_name: __qsortcompare_t
+  - type_name: __bsearchcompare_t
+  - type_name: size_t
+  - type_name: lldiv_t
+  - type_name: ldiv_t
+  - type_name: div_t
+enums: []
+objects: []
+functions:
+  - name: _Exit
+    standards:
+      - stdc
+    return_type: _Noreturn void
+    arguments:
+      - type: int
+  - name: abort
+    standards:
+      - stdc
+    return_type: _Noreturn void
+    arguments:
+      - type: void
+  - name: abs
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: int
+  - name: aligned_alloc
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: size_t
+      - type: size_t
+  - name: at_quick_exit
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: __atexithandler_t
+  - name: atexit
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: __atexithandler_t
+  - name: atof
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: const char *__restrict
+  - name: atoi
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
+  - name: atol
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: const char *
+  - name: atoll
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: const char *
+  - name: bsearch
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: const void *
+      - type: const void *
+      - type: size_t
+      - type: size_t
+      - type: __bsearchcompare_t
+  - name: calloc
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: size_t
+      - type: size_t
+  - name: div
+    standards:
+      - stdc
+    return_type: div_t
+    arguments:
+      - type: int
+      - type: int
+  - name: exit
+    standards:
+      - stdc
+    return_type: _Noreturn void
+    arguments:
+      - type: int
+  - name: free
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: void *
+  - name: getenv
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const char *
+  - name: labs
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: long
+  - name: ldiv
+    standards:
+      - stdc
+    return_type: ldiv_t
+    arguments:
+      - type: long
+      - type: long
+  - name: llabs
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: long long
+  - name: lldiv
+    standards:
+      - stdc
+    return_type: lldiv_t
+    arguments:
+      - type: long long
+      - type: long long
+  - name: malloc
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: size_t
+  - name: qsort
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: size_t
+      - type: __qsortcompare_t
+  - name: qsort_r
+    standards:
+      - GNUExtensions
+    return_type: void
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: size_t
+      - type: __qsortrcompare_t
+      - type: void *
+  - name: quick_exit
+    standards:
+      - stdc
+    return_type: _Noreturn void
+    arguments:
+      - type: int
+  - name: rand
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: void
+  - name: realloc
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: void *
+      - type: size_t
+  - name: srand
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: unsigned int
+  - name: strfromd
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: char *__restrict
+      - type: size_t
+      - type: const char *__restrict
+      - type: double
+  - name: strfromf
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: char *__restrict
+      - type: size_t
+      - type: const char *__restrict
+      - type: float
+  - name: strfroml
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: char *__restrict
+      - type: size_t
+      - type: const char *__restrict
+      - type: long double
+  - name: strtod
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+  - name: strtof
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+  - name: strtol
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: int
+  - name: strtold
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+  - name: strtoll
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: int
+  - name: strtoul
+    standards:
+      - stdc
+    return_type: unsigned long
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: int
+  - name: strtoull
+    standards:
+      - stdc
+    return_type: unsigned long long
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: int
+  - name: strtod_l
+    standards:
+      - stdc
+    return_type: double
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: locale_t
+  - name: strtof_l
+    standards:
+      - stdc
+    return_type: float
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: locale_t
+  - name: strtol_l
+    standards:
+      - stdc
+    return_type: long
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: int
+      - type: locale_t
+  - name: strtold_l
+    standards:
+      - stdc
+    return_type: long double
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: locale_t
+  - name: strtoll_l
+    standards:
+      - stdc
+    return_type: long long
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: int
+      - type: locale_t
+  - name: strtoul_l
+    standards:
+      - stdc
+    return_type: unsigned long
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: int
+      - type: locale_t
+  - name: strtoull_l
+    standards:
+      - stdc
+    return_type: unsigned long long
+    arguments:
+      - type: const char *__restrict
+      - type: char **__restrict
+      - type: int
+      - type: locale_t
+  - name: system
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
diff --git a/libc/include/string.yaml b/libc/include/string.yaml
new file mode 100644
index 000000000000..af1750e91243
--- /dev/null
+++ b/libc/include/string.yaml
@@ -0,0 +1,319 @@
+header: string.h
+macros: []
+types:
+  - type_name: size_t
+enums: []
+objects: []
+functions:
+  - name: memccpy
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: void *__restrict
+      - type: const void *__restrict
+      - type: int
+      - type: size_t
+  - name: memchr
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: const void *
+      - type: int
+      - type: size_t
+  - name: memcmp
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const void *
+      - type: const void *
+      - type: size_t
+  - name: memcpy
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: void *__restrict
+      - type: const void *__restrict
+      - type: size_t
+  - name: memmem
+    standards:
+      - GNUExtensions
+    return_type: void *
+    arguments:
+      - type: const void *
+      - type: size_t
+      - type: const void *
+      - type: size_t
+  - name: memmove
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: void *
+      - type: const void *
+      - type: size_t
+  - name: mempcpy
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: void *__restrict
+      - type: const void *__restrict
+      - type: size_t
+  - name: memrchr
+    standards:
+      - GNUExtensions
+    return_type: void *
+    arguments:
+      - type: const void *
+      - type: int
+      - type: size_t
+  - name: memset
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: void *
+      - type: int
+      - type: size_t
+  - name: memset_explicit
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: void *
+      - type: int
+      - type: size_t
+  - name: stpcpy
+    standards:
+      - POSIX
+    return_type: char *
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+  - name: stpncpy
+    standards:
+      - POSIX
+    return_type: char *
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: size_t
+  - name: strcasestr
+    standards:
+      - GNUExtensions
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: strcat
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+  - name: strchr
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: int
+  - name: strchrnul
+    standards:
+      - GNUExtensions
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: int
+  - name: strcmp
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: strcoll
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: strcoll_l
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+      - type: locale_t
+  - name: strcpy
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+  - name: strcspn
+    standards:
+      - stdc
+    return_type: size_t
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: strdup
+    return_type: char *
+    arguments:
+      - type: const char *
+  - name: strerror
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: int
+  - name: strerror_r
+    standards:
+      - GNUExtensions
+    return_type: char *
+    arguments:
+      - type: int
+      - type: char *
+      - type: size_t
+  - name: strlcat
+    standards:
+      - BSDExtensions
+    return_type: size_t
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: size_t
+  - name: strlcpy
+    standards:
+      - BSDExtensions
+    return_type: size_t
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: size_t
+  - name: strlen
+    standards:
+      - stdc
+    return_type: size_t
+    arguments:
+      - type: const char *
+  - name: strncat
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: char *
+      - type: const char *
+      - type: size_t
+  - name: strncmp
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+      - type: size_t
+  - name: strncpy
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: size_t
+  - name: strndup
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: size_t
+  - name: strnlen
+    standards:
+      - POSIX
+    return_type: size_t
+    arguments:
+      - type: const char *
+      - type: size_t
+  - name: strpbrk
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: strrchr
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: int
+  - name: strsep
+    standards:
+      - BSDExtensions
+    return_type: char *
+    arguments:
+      - type: char **__restrict
+      - type: const char *__restrict
+  - name: strsignal
+    standards:
+      - POSIX
+    return_type: char *
+    arguments:
+      - type: int
+  - name: strspn
+    standards:
+      - stdc
+    return_type: size_t
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: strstr
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: strtok
+    standards:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+  - name: strtok_r
+    standards:
+      - POSIX
+    return_type: char *
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: char ** __restrict
+  - name: strxfrm
+    standards:
+      - stdc
+    return_type: size_t
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: size_t
+  - name: strxfrm_l
+    standards:
+      - stdc
+    return_type: size_t
+    arguments:
+      - type: char *__restrict
+      - type: const char *__restrict
+      - type: size_t
+      - type: locale_t
diff --git a/libc/include/strings.yaml b/libc/include/strings.yaml
new file mode 100644
index 000000000000..ca91b626740c
--- /dev/null
+++ b/libc/include/strings.yaml
@@ -0,0 +1,58 @@
+header: strings.h
+macros: []
+types: []
+enums: []
+objects: []
+functions:
+  - name: bcmp
+    standards:
+      - llvm_libc_ext
+    return_type: int
+    arguments:
+      - type: const void *
+      - type: const void *
+      - type: size_t
+  - name: bcopy
+    standards:
+      - llvm_libc_ext
+    return_type: void
+    arguments:
+      - type: const void *
+      - type: void *
+      - type: size_t
+  - name: bzero
+    standards:
+      - llvm_libc_ext
+    return_type: void
+    arguments:
+      - type: void *
+      - type: size_t
+  - name: index
+    standards:
+      - BSDExtensions
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: int
+  - name: rindex
+    standards:
+      - BSDExtensions
+    return_type: char *
+    arguments:
+      - type: const char *
+      - type: int
+  - name: strcasecmp
+    standards:
+      - BSDExtensions
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: strncasecmp
+    standards:
+      - BSDExtensions
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+      - type: size_t
diff --git a/libc/include/sys/auxv.yaml b/libc/include/sys/auxv.yaml
new file mode 100644
index 000000000000..9d546b358824
--- /dev/null
+++ b/libc/include/sys/auxv.yaml
@@ -0,0 +1,12 @@
+header: sys-auxv.h
+macros: []
+types: []
+enums: []
+objects: []
+functions:
+  - name: getauxval
+    standards:
+      - GNUExtensions
+    return_type: unsigned long
+    arguments:
+      - type: unsigned long
diff --git a/libc/include/sys/epoll.yaml b/libc/include/sys/epoll.yaml
new file mode 100644
index 000000000000..ee188c17fedc
--- /dev/null
+++ b/libc/include/sys/epoll.yaml
@@ -0,0 +1,60 @@
+header: sys-epoll.h
+macros: []
+types:
+  - type_name: struct_epoll_event
+  - type_name: struct_epoll_data
+  - type_name: sigset_t
+  - type_name: struct_timespec
+enums: []
+objects: []
+functions:
+  - name: epoll_create
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: int
+  - name: epoll_create1
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: int
+  - name: epoll_ctl
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+      - type: int
+      - type: struct epoll_event *
+  - name: epoll_pwait
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: int
+      - type: struct epoll_event *
+      - type: int
+      - type: int
+      - type: const sigset_t *
+  - name: epoll_pwait2
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: int
+      - type: struct epoll_event *
+      - type: int
+      - type: const struct timespec *
+      - type: const sigset_t *
+  - name: epoll_wait
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: int
+      - type: struct epoll_event *
+      - type: int
+      - type: int
diff --git a/libc/include/sys/ioctl.yaml b/libc/include/sys/ioctl.yaml
new file mode 100644
index 000000000000..ffe73a84d51b
--- /dev/null
+++ b/libc/include/sys/ioctl.yaml
@@ -0,0 +1,7 @@
+header: sys-ioctl.h
+standards: POSIX
+macros: []
+types: []
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/sys/mman.yaml b/libc/include/sys/mman.yaml
new file mode 100644
index 000000000000..962ca3591917
--- /dev/null
+++ b/libc/include/sys/mman.yaml
@@ -0,0 +1,134 @@
+header: sys-mman.h
+macros: []
+types:
+  - type_name: mode_t
+  - type_name: size_t
+  - type_name: off_t
+enums: []
+objects: []
+functions:
+  - name: madvise
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: int
+  - name: mincore
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: unsigned char *
+  - name: mlock
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+  - name: mlock2
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: unsigned int
+  - name: mlockall
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: mmap
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: int
+      - type: int
+      - type: int
+      - type: off_t
+  - name: mremap
+    standards:
+      - POSIX
+    return_type: void *
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: size_t
+      - type: int
+      - type: '...'
+  - name: mprotect
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: int
+  - name: msync
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: int
+  - name: munlock
+    standards: POSIX
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+  - name: munlockall
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void
+  - name: munmap
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+  - name: posix_madvise
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: int
+  - name: remap_file_pages
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: int
+      - type: size_t
+      - type: int
+  - name: shm_open
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: int
+      - type: mode_t
+  - name: shm_unlink
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
diff --git a/libc/include/sys/prctl.yaml b/libc/include/sys/prctl.yaml
new file mode 100644
index 000000000000..82374be87d5d
--- /dev/null
+++ b/libc/include/sys/prctl.yaml
@@ -0,0 +1,16 @@
+header: sys-prctl.h
+macros: []
+types: []
+enums: []
+objects: []
+functions:
+  - name: prctl
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: int
+      - type: unsigned long
+      - type: unsigned long
+      - type: unsigned long
+      - type: unsigned long
diff --git a/libc/include/sys/random.yaml b/libc/include/sys/random.yaml
new file mode 100644
index 000000000000..228bb50d5db9
--- /dev/null
+++ b/libc/include/sys/random.yaml
@@ -0,0 +1,16 @@
+header: sys-random.h
+macros: []
+types:
+  - type_name: ssize_t
+  - type_name: size_t
+enums: []
+objects: []
+functions:
+  - name: getrandom
+    standards:
+      - Linux
+    return_type: ssize_t
+    arguments:
+      - type: void *
+      - type: size_t
+      - type: unsigned int
diff --git a/libc/include/sys/resource.yaml b/libc/include/sys/resource.yaml
new file mode 100644
index 000000000000..85ea1ad12f19
--- /dev/null
+++ b/libc/include/sys/resource.yaml
@@ -0,0 +1,20 @@
+header: sys-resource.h
+macros: []
+types:
+  - type_name: struct_rlimit
+  - type_name: rlim_t
+enums: []
+objects: []
+functions:
+  - name: getrlimit
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: struct rlimit *
+  - name: setrlimit
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const struct rlimit
diff --git a/libc/include/sys/select.yaml b/libc/include/sys/select.yaml
new file mode 100644
index 000000000000..c6806122aa81
--- /dev/null
+++ b/libc/include/sys/select.yaml
@@ -0,0 +1,22 @@
+header: sys-select.h
+macros: []
+types:
+  - type_name: struct_timeval
+  - type_name: struct_timespec
+  - type_name: suseconds_t
+  - type_name: sigset_t
+  - type_name: time_t
+  - type_name: fd_set
+enums: []
+objects: []
+functions:
+  - name: select
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: fd_set *__restrict
+      - type: fd_set *__restrict
+      - type: fd_set *__restrict
+      - type: struct timeval *__restrict
diff --git a/libc/include/sys/sendfile.yaml b/libc/include/sys/sendfile.yaml
new file mode 100644
index 000000000000..7e45e40e171d
--- /dev/null
+++ b/libc/include/sys/sendfile.yaml
@@ -0,0 +1,18 @@
+header: sys-sendfile.h
+macros: []
+types:
+  - type_name: ssize_t
+  - type_name: size_t
+  - type_name: off_t
+enums: []
+objects: []
+functions:
+  - name: sendfile
+    standards:
+      - GNUExtensions
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: int
+      - type: off_t *
+      - type: size_t
diff --git a/libc/include/sys/socket.yaml b/libc/include/sys/socket.yaml
new file mode 100644
index 000000000000..47d835fa5f4a
--- /dev/null
+++ b/libc/include/sys/socket.yaml
@@ -0,0 +1,118 @@
+header: sys-socket.h
+macros: []
+types:
+  - type_name: struct_sockaddr_un
+  - type_name: struct_sockaddr
+  - type_name: socklen_t
+  - type_name: sa_family_t
+  - type_name: struct_msghdr
+  - type_name: struct_iovec
+  - type_name: size_t
+  - type_name: ssize_t
+enums: []
+objects: []
+functions:
+  - name: accept
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: sockaddr *__restrict
+      - type: socklen_t *__restrict
+  - name: bind
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const struct sockaddr *
+      - type: socklen_t
+  - name: connect
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const struct sockaddr *
+      - type: socklen_t
+  - name: listen
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+  - name: recv
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: void *
+      - type: size_t
+      - type: int
+  - name: recvfrom
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: void *
+      - type: size_t
+      - type: int
+      - type: struct sockaddr *__restrict
+      - type: socklen_t *__restrict
+  - name: recvmsg
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: struct msghdr *
+      - type: int
+  - name: send
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: const void*
+      - type: size_t
+      - type: int
+  - name: sendmsg
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: const struct msghdr *
+      - type: int
+  - name: sendto
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: const void *
+      - type: size_t
+      - type: int
+      - type: const struct sockaddr *
+      - type: socklen_t
+  - name: socket
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+      - type: int
+  - name: socketpair
+    standards:
+      - posix
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+      - type: int
+      - type: int*
diff --git a/libc/include/sys/stat.yaml b/libc/include/sys/stat.yaml
new file mode 100644
index 000000000000..ed500f832f90
--- /dev/null
+++ b/libc/include/sys/stat.yaml
@@ -0,0 +1,77 @@
+header: sys-stat.h
+macros: []
+types:
+  - type_name: blkcnt_t
+  - type_name: blksize_t
+  - type_name: off_t
+  - type_name: struct_timeval
+  - type_name: gid_t
+  - type_name: struct_stat
+  - type_name: uid_t
+  - type_name: nlink_t
+  - type_name: dev_t
+  - type_name: struct_timespec
+  - type_name: ino_t
+  - type_name: mode_t
+enums: []
+objects: []
+functions:
+  - name: chmod
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: mode_t
+  - name: fchmod
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: mode_t
+  - name: fchmodat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const char *
+      - type: mode_t
+      - type: int
+  - name: fstat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: struct stat *
+  - name: lstat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: struct stat *__restrict
+  - name: mkdir
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: mode_t
+  - name: mkdirat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const char *
+      - type: mode_t
+  - name: stat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: struct stat *__restrict
diff --git a/libc/include/sys/statvfs.yaml b/libc/include/sys/statvfs.yaml
new file mode 100644
index 000000000000..22e0ef22c413
--- /dev/null
+++ b/libc/include/sys/statvfs.yaml
@@ -0,0 +1,23 @@
+header: sys-statvfs.h
+macros: []
+types:
+  - type_name: struct_statvfs
+  - type_name: fsblkcnt_t
+  - type_name: fsfilcnt_t
+enums: []
+objects: []
+functions:
+  - name: fstatvfs
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: struct statvfs *
+  - name: statvfs
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *__restrict
+      - type: struct statvfs *__restrict
diff --git a/libc/include/sys/syscall.h.def b/libc/include/sys/syscall.h.def
index 11758ea8336d..03c19eb0885e 100644
--- a/libc/include/sys/syscall.h.def
+++ b/libc/include/sys/syscall.h.def
@@ -2349,12 +2349,5 @@
 #define SYS_writev __NR_writev
 #endif
 
-#ifdef __NR_process_mrelease
-#define SYS_process_mrelease __NR_process_mrelease
-#endif
-
-#ifdef __NR_pidfd_open
-#define SYS_pidfd_open __NR_pidfd_open
-#endif
 
 #endif // LLVM_LIBC_SYS_SYSCALL_H
diff --git a/libc/include/sys/syscall.yaml b/libc/include/sys/syscall.yaml
new file mode 100644
index 000000000000..c0a64338b6f7
--- /dev/null
+++ b/libc/include/sys/syscall.yaml
@@ -0,0 +1,7 @@
+header: sys-syscall.h
+standards: Linux
+macros: []
+types: []
+enums: []
+functions: []
+objects: []
diff --git a/libc/include/sys/time.yaml b/libc/include/sys/time.yaml
new file mode 100644
index 000000000000..eb3dd548389b
--- /dev/null
+++ b/libc/include/sys/time.yaml
@@ -0,0 +1,7 @@
+header: sys-time.h
+standards: Linux
+macros: []
+types: []
+enums: []
+functions: []
+objects: []
diff --git a/libc/include/sys/types.yaml b/libc/include/sys/types.yaml
new file mode 100644
index 000000000000..15eaf107f691
--- /dev/null
+++ b/libc/include/sys/types.yaml
@@ -0,0 +1,31 @@
+header: sys-types.h
+standards: POSIX
+macros: []
+types:
+  - type_name: uid_t
+  - type_name: time_t
+  - type_name: pthread_t
+  - type_name: pthread_rwlock_t
+  - type_name: pthread_rwlockattr_t
+  - type_name: pthread_mutex_t
+  - type_name: blkcnt_t
+  - type_name: blksize_t
+  - type_name: clockid_t
+  - type_name: ssize_t
+  - type_name: pthread_mutexattr_t
+  - type_name: ino_t
+  - type_name: pthread_once_t
+  - type_name: mode_t
+  - type_name: dev_t
+  - type_name: pthread_attr_t
+  - type_name: gid_t
+  - type_name: pid_t
+  - type_name: nlink_t
+  - type_name: suseconds_t
+  - type_name: off_t
+  - type_name: size_t
+  - type_name: pthread_key_t
+  - type_name: pthread_condattr_t
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/sys/utsname.yaml b/libc/include/sys/utsname.yaml
new file mode 100644
index 000000000000..eecd55b18082
--- /dev/null
+++ b/libc/include/sys/utsname.yaml
@@ -0,0 +1,13 @@
+header: sys-utsname.h
+macros: []
+types:
+  - type_name: struct_utsname
+enums: []
+objects: []
+functions:
+  - name: uname
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: struct utsname *
diff --git a/libc/include/sys/wait.yaml b/libc/include/sys/wait.yaml
new file mode 100644
index 000000000000..4f0c69baee2c
--- /dev/null
+++ b/libc/include/sys/wait.yaml
@@ -0,0 +1,33 @@
+header: sys-wait.h
+macros: []
+types:
+  - type_name: siginfo_t
+  - type_name: struct_rusage
+  - type_name: pid_t
+enums: []
+objects: []
+functions:
+  - name: wait
+    standards:
+      - POSIX
+    return_type: pid_t
+    arguments:
+      - type: int *
+  - name: wait4
+    standards:
+      - BSDExtensions
+      - POSIX
+    return_type: pid_t
+    arguments:
+      - type: pid_t
+      - type: int *
+      - type: int
+      - type: struct rusage *
+  - name: waitpid
+    standards:
+      - POSIX
+    return_type: pid_t
+    arguments:
+      - type: pid_t
+      - type: int *
+      - type: int
diff --git a/libc/include/termios.yaml b/libc/include/termios.yaml
new file mode 100644
index 000000000000..e9c4cd375d0b
--- /dev/null
+++ b/libc/include/termios.yaml
@@ -0,0 +1,85 @@
+header: termios.h
+macros: []
+types:
+  - type_name: tcflag_t
+  - type_name: struct_termios
+  - type_name: speed_t
+  - type_name: pid_t
+  - type_name: cc_t
+enums: []
+objects: []
+functions:
+  - name: cfgetispeed
+    standards:
+      - POSIX
+    return_type: speed_t
+    arguments:
+      - type: const struct termios *
+  - name: cfgetospeed
+    standards:
+      - POSIX
+    return_type: speed_t
+    arguments:
+      - type: const struct termios *
+  - name: cfsetispeed
+    standards:
+      - POSIX
+    return_type: speed_t
+    arguments:
+      - type: struct termios *
+      - type: speed_t
+  - name: cfsetospeed
+    standards:
+      - POSIX
+    return_type: speed_t
+    arguments:
+      - type: struct termios *
+      - type: speed_t
+  - name: tcdrain
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: tcflow
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+  - name: tcflush
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+  - name: tcgetattr
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: struct termios *
+  - name: tcgetsid
+    standards:
+      - POSIX
+    return_type: pid_t
+    arguments:
+      - type: int
+  - name: tcsendbreak
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+  - name: tcsetattr
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+      - type: struct termios *
diff --git a/libc/include/threads.yaml b/libc/include/threads.yaml
new file mode 100644
index 000000000000..aadcaf5f66e0
--- /dev/null
+++ b/libc/include/threads.yaml
@@ -0,0 +1,161 @@
+header: threads.h
+macros:
+  - macro_name: ONCE_FLAG_INIT
+    macro_value: '{0}'
+types:
+  - type_name: once_flag
+  - type_name: __call_once_func_t
+  - type_name: cnd_t
+  - type_name: mtx_t
+  - type_name: thrd_start_t
+  - type_name: thrd_t
+  - type_name: tss_t
+  - type_name: tss_dtor_t
+enums:
+  - name: mtx_plain
+    value: null
+  - name: mtx_recursive
+    value: null
+  - name: mtx_timed
+    value: null
+  - name: thrd_timedout
+    value: null
+  - name: thrd_success
+    value: null
+  - name: thrd_busy
+    value: null
+  - name: thrd_error
+    value: null
+  - name: thrd_nomem
+    value: null
+objects: []
+functions:
+  - name: call_once
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: once_flag *
+      - type: __call_once_func_t
+  - name: cnd_broadcast
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: cnd_t *
+  - name: cnd_destroy
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: cnd_t *
+  - name: cnd_init
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: cnd_t *
+  - name: cnd_signal
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: cnd_t *
+  - name: cnd_wait
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: cnd_t *
+      - type: mtx_t *
+  - name: mtx_destroy
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: void
+  - name: mtx_init
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: mtx_t *
+      - type: int
+  - name: mtx_lock
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: mtx_t *
+  - name: mtx_unlock
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: mtx_t *
+  - name: thrd_create
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: thrd_t *
+      - type: thrd_start_t
+      - type: void *
+  - name: thrd_current
+    standards:
+      - stdc
+    return_type: thrd_t
+    arguments:
+      - type: void
+  - name: thrd_detach
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: thrd_t
+  - name: thrd_equal
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: thrd_t
+      - type: thrd_t
+  - name: thrd_exit
+    standards:
+      - stdc
+    return_type: void
+    arguments:
+      - type: int
+  - name: thrd_join
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: thrd_t
+      - type: int *
+  - name: tss_create
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: tss_t *
+      - type: tss_dtor_t
+  - name: tss_delete
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: tss_t
+  - name: tss_get
+    standards:
+      - stdc
+    return_type: void *
+    arguments:
+      - type: tss_t
+  - name: tss_set
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: tss_t
+      - type: void *
diff --git a/libc/include/time.yaml b/libc/include/time.yaml
new file mode 100644
index 000000000000..3f745e5ee338
--- /dev/null
+++ b/libc/include/time.yaml
@@ -0,0 +1,105 @@
+header: time.h
+macros: []
+types:
+  - type_name: struct_timeval
+  - type_name: clockid_t
+  - type_name: struct_timespec
+  - type_name: struct_tm
+  - type_name: time_t
+  - type_name: clock_t
+  - type_name: size_t
+enums: []
+objects: []
+functions:
+  - name: asctime
+    standard:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const struct tm *
+  - name: asctime_r
+    standard:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: struct tm *
+      - type: char *
+  - name: ctime
+    standard:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const time_t *
+  - name: ctime_r
+    standard:
+      - stdc
+    return_type: char *
+    arguments:
+      - type: const time_t *
+      - type: char *
+  - name: clock
+    standard:
+      - stdc
+    return_type: clock_t
+    arguments:
+      - type: void
+  - name: clock_gettime
+    standard:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: clockid_t
+      - type: struct timespec *
+  - name: difftime
+    standard:
+      - stdc
+    return_type: double
+    arguments:
+      - type: time_t
+      - type: time_t
+  - name: gettimeofday
+    standard:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: struct timeval *
+      - type: void *
+  - name: gmtime
+    standard:
+      - stdc
+    return_type: struct tm *
+    arguments:
+      - type: time_t *
+  - name: gmtime_r
+    standard:
+      - stdc
+    return_type: struct tm *
+    arguments:
+      - type: time_t *
+      - type: struct tm *
+  - name: mktime
+    standard:
+      - stdc
+    return_type: time_t
+    arguments:
+      - type: struct tm *
+  - name: nanosleep
+    standard:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const struct timespec *
+      - type: struct timespec *
+  - name: time
+    standard:
+      - stdc
+    return_type: time_t
+    arguments:
+      - type: time_t *
+  - name: timespec_get
+    standard:
+      - stdc
+    return_type: int
+    arguments:
+      - type: struct timespec *
+      - type: int
diff --git a/libc/include/uchar.yaml b/libc/include/uchar.yaml
new file mode 100644
index 000000000000..18ca840612e0
--- /dev/null
+++ b/libc/include/uchar.yaml
@@ -0,0 +1,13 @@
+header: uchar.h
+standards:
+  - stdc
+macros: []
+types:
+  - type_name: char32_t
+  - type_name: char16_t
+  - type_name: char8_t
+  - type_name: mbstate_t
+  - type_name: size_t
+enums: []
+objects: []
+functions: []
diff --git a/libc/include/unistd.yaml b/libc/include/unistd.yaml
new file mode 100644
index 000000000000..c6441c04ce3a
--- /dev/null
+++ b/libc/include/unistd.yaml
@@ -0,0 +1,322 @@
+header: unistd.h
+macros: []
+types:
+  - type_name: uid_t
+  - type_name: ssize_t
+  - type_name: size_t
+  - type_name: pid_t
+  - type_name: off_t
+  - type_name: __getoptargv_t
+  - type_name: __exec_envp_t
+  - type_name: __exec_argv_t
+enums: []
+objects:
+  - object_name: environ
+    object_type: char **
+  - object_name: optarg
+    object_type: char *
+  - object_name: optind
+    object_type: int
+  - object_name: opterr
+    object_type: int
+  - object_name: optopt
+    object_type: int
+functions:
+  - name: __llvm_libc_syscall
+    standards:
+      - POSIX
+    return_type: long
+    arguments:
+      - type: long
+      - type: long
+      - type: long
+      - type: long
+      - type: long
+      - type: long
+      - type: long
+  - name: _exit
+    standards:
+      - POSIX
+    return_type: _Noreturn void
+    arguments:
+      - type: int
+  - name: access
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: int
+  - name: chdir
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+  - name: close
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: dup
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: dup2
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+  - name: dup3
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: int
+      - type: int
+  - name: execv
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: __exec_argv_t
+  - name: execve
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: __exec_argv_t
+      - type: __exec_envp_t
+  - name: fchdir
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: fork
+    standards:
+      - POSIX
+    return_type: pid_t
+    arguments:
+      - type: void
+  - name: fsync
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: ftruncate
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: off_t
+  - name: getcwd
+    standards:
+      - POSIX
+    return_type: char *
+    arguments:
+      - type: char *
+      - type: size_t
+  - name: geteuid
+    standards:
+      - POSIX
+    return_type: uid_t
+    arguments:
+      - type: void
+  - name: getopt
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: __getoptargv_t
+      - type: const char *
+  - name: getpid
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void
+  - name: getppid
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: void
+  - name: gettid
+    standards:
+      - Linux
+    return_type: pid_t
+    arguments:
+      - type: void
+  - name: getuid
+    standards:
+      - POSIX
+    return_type: uid_t
+    arguments:
+      - type: void
+  - name: isatty
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+    guard: null
+    attributes: []
+  - name: link
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: linkat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const char *
+      - type: int
+      - type: const char *
+      - type: int
+  - name: lseek
+    standards:
+      - POSIX
+    return_type: off_t
+    arguments:
+      - type: int
+      - type: off_t
+      - type: int
+  - name: pipe
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int *
+  - name: pipe2
+    standards:
+      - Linux
+    return_type: int
+    arguments:
+      - type: int *
+      - type: int
+  - name: pread
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: void *
+      - type: size_t
+      - type: off_t
+  - name: pwrite
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: const void *
+      - type: size_t
+      - type: off_t
+  - name: read
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: void *
+      - type: size_t
+  - name: readlink
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: const char *__restrict
+      - type: char *__restrict
+      - type: size_t
+  - name: readlinkat
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: const char *__restrict
+      - type: char *__restrict
+      - type: size_t
+  - name: rmdir
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+  - name: swab
+    standards:
+      - POSIX
+    return_type: void
+    arguments:
+      - type: const void *__restrict
+      - type: void *
+      - type: ssize_t
+  - name: symlink
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: const char *
+  - name: symlinkat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const char *
+      - type: int
+      - type: const char *
+  - name: sysconf
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+  - name: truncate
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+      - type: off_t
+  - name: unlink
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: const char *
+  - name: unlinkat
+    standards:
+      - POSIX
+    return_type: int
+    arguments:
+      - type: int
+      - type: const char *
+      - type: int
+  - name: write
+    standards:
+      - POSIX
+    return_type: ssize_t
+    arguments:
+      - type: int
+      - type: const void *
+      - type: size_t
+    guard: null
+    attributes: []
diff --git a/libc/include/wchar.yaml b/libc/include/wchar.yaml
new file mode 100644
index 000000000000..bc824b21d8be
--- /dev/null
+++ b/libc/include/wchar.yaml
@@ -0,0 +1,16 @@
+header: wchar.h
+macros: []
+types:
+  - type_name: size_t
+  - type_name: wint_t
+  - type_name: wchar_t
+  - type_name: mbstate_t
+enums: []
+objects: []
+functions:
+  - name: wctob
+    standards:
+      - stdc
+    return_type: int
+    arguments:
+      - type: wint_t