Merge branch 'main' into users/chapuni/cov/single/unifyusers/chapuni/cov/single/unify

57 files changed, 82 insertions, 76 deletions

diff --git a/libc/include/CMakeLists.txt b/libc/include/CMakeLists.txt
index eb407183c99f..568bb05d9230 100644
--- a/libc/include/CMakeLists.txt
+++ b/libc/include/CMakeLists.txt
@@ -19,11 +19,10 @@ add_header(
 
 # TODO: Can we simplify this macro expansion?
 # https://github.com/llvm/llvm-project/issues/117254
-macro(add_header_macro TARGET_NAME YAML_FILE DEF_FILE GEN_HDR DEPENDS)
+macro(add_header_macro TARGET_NAME YAML_FILE GEN_HDR DEPENDS)
   add_gen_header(
     ${TARGET_NAME}
     YAML_FILE ${YAML_FILE}
-    DEF_FILE ${DEF_FILE}
     GEN_HDR ${GEN_HDR}
     ${DEPENDS}
     ${ARGN}
@@ -33,7 +32,6 @@ endmacro()
 add_header_macro(
   ctype
   ../libc/include/ctype.yaml
-  ctype.h.def
   ctype.h
   DEPENDS
     .llvm_libc_common_h
@@ -43,7 +41,6 @@ add_header_macro(
 add_header_macro(
   dirent
   ../libc/include/dirent.yaml
-  dirent.h.def
   dirent.h
   DEPENDS
     .llvm_libc_common_h
@@ -55,7 +52,6 @@ add_header_macro(
 add_header_macro(
   fcntl
   ../libc/include/fcntl.yaml
-  fcntl.h.def
   fcntl.h
   DEPENDS
     .llvm-libc-macros.fcntl_macros
@@ -71,7 +67,6 @@ add_header_macro(
 add_header_macro(
   dlfcn
   ../libc/include/dlfcn.yaml
-  dlfcn.h.def
   dlfcn.h
   DEPENDS
     .llvm-libc-macros.dlfcn_macros
@@ -81,7 +76,6 @@ add_header_macro(
 add_header_macro(
   features
   ../libc/include/features.yaml
-  features.h.def
   features.h
   DEPENDS
     .llvm_libc_common_h
@@ -91,7 +85,6 @@ add_header_macro(
 add_header_macro(
   fenv
   ../libc/include/fenv.yaml
-  fenv.h.def
   fenv.h
   DEPENDS
     .llvm_libc_common_h
@@ -103,7 +96,6 @@ add_header_macro(
 add_header_macro(
   inttypes
   ../libc/include/inttypes.yaml
-  inttypes.h.def
   inttypes.h
   DEPENDS
     .llvm_libc_common_h
@@ -114,7 +106,6 @@ add_header_macro(
 add_header_macro(
   float
   ../libc/include/float.yaml
-  float.h.def
   float.h
   DEPENDS
     .llvm-libc-macros.float_macros
@@ -123,7 +114,6 @@ add_header_macro(
 add_header_macro(
   stdint
   ../libc/include/stdint.yaml
-  stdint.h.def
   stdint.h
   DEPENDS
     .llvm-libc-macros.stdint_macros
@@ -132,7 +122,6 @@ add_header_macro(
 add_header_macro(
   limits
   ../libc/include/limits.yaml
-  limits.h.def
   limits.h
   DEPENDS
     .llvm-libc-macros.limits_macros
@@ -141,7 +130,6 @@ add_header_macro(
 add_header_macro(
   malloc
   ../libc/include/malloc.yaml
-  malloc.h.def
   malloc.h
   DEPENDS
     .llvm_libc_common_h
@@ -151,7 +139,6 @@ add_header_macro(
 add_header_macro(
   math
   ../libc/include/math.yaml
-  math.h.def
   math.h
   DEPENDS
     .llvm_libc_common_h
@@ -166,7 +153,6 @@ add_header_macro(
 add_header_macro(
   stdfix
   ../libc/include/stdfix.yaml
-  stdfix.h.def
   stdfix.h
   DEPENDS
     .llvm-libc-macros.stdfix_macros
@@ -179,7 +165,6 @@ file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/arpa)
 add_header_macro(
   arpa_inet
   ../libc/include/arpa/inet.yaml
-  arpa/inet.h.def
   arpa/inet.h
   DEPENDS
     .llvm_libc_common_h
@@ -188,7 +173,6 @@ add_header_macro(
 add_header_macro(
   assert
   ../libc/include/assert.yaml
-  assert.h.def
   assert.h
   DEPENDS
     .llvm_libc_common_h
@@ -198,7 +182,6 @@ add_header_macro(
 add_header_macro(
   complex
   ../libc/include/complex.yaml
-  complex.h.def
   complex.h
   DEPENDS
     .llvm_libc_common_h
@@ -208,7 +191,6 @@ add_header_macro(
 add_header_macro(
   setjmp
   ../libc/include/setjmp.yaml
-  setjmp.h.def
   setjmp.h
   DEPENDS
     .llvm_libc_common_h
@@ -218,7 +200,6 @@ add_header_macro(
 add_header_macro(
   string
   ../libc/include/string.yaml
-  string.h.def
   string.h
   DEPENDS
     .llvm_libc_common_h
@@ -229,7 +210,6 @@ add_header_macro(
 add_header_macro(
   strings
   ../libc/include/strings.yaml
-  strings.h.def
   strings.h
   DEPENDS
     .llvm_libc_common_h
@@ -239,7 +219,6 @@ add_header_macro(
 add_header_macro(
   search
   ../libc/include/search.yaml
-  search.h.def
   search.h
   DEPENDS
     .llvm_libc_common_h
@@ -253,7 +232,6 @@ add_header_macro(
 add_header_macro(
   time
   ../libc/include/time.yaml
-  time.h.def
   time.h
   DEPENDS
     .llvm_libc_common_h
@@ -269,7 +247,6 @@ add_header_macro(
 add_header_macro(
   threads
   ../libc/include/threads.yaml
-  threads.h.def
   threads.h
   DEPENDS
     .llvm_libc_common_h
@@ -286,7 +263,6 @@ add_header_macro(
 add_header_macro(
   errno
   ../libc/include/errno.yaml
-  errno.h.def
   errno.h
   DEPENDS
     .llvm-libc-macros.generic_error_number_macros
@@ -296,7 +272,6 @@ add_header_macro(
 add_header_macro(
   signal
   ../libc/include/signal.yaml
-  signal.h.def
   signal.h
   DEPENDS
     .llvm-libc-macros.signal_macros
@@ -312,7 +287,6 @@ add_header_macro(
 add_header_macro(
   stdbit
   ../libc/include/stdbit.yaml
-  stdbit.h.def
   stdbit.h
   DEPENDS
     .llvm_libc_common_h
@@ -322,7 +296,6 @@ add_header_macro(
 add_header_macro(
   stdckdint
   ../libc/include/stdckdint.yaml
-  stdckdint.h.def
   stdckdint.h
   DEPENDS
     .llvm_libc_common_h
@@ -332,7 +305,6 @@ add_header_macro(
 add_header_macro(
   stdio
   ../libc/include/stdio.yaml
-  stdio.h.def
   stdio.h
   DEPENDS
     .llvm-libc-macros.file_seek_macros
@@ -348,7 +320,6 @@ add_header_macro(
 add_header_macro(
   stdlib
   ../libc/include/stdlib.yaml
-  stdlib.h.def
   stdlib.h
   DEPENDS
     .llvm_libc_common_h
@@ -367,7 +338,6 @@ add_header_macro(
 add_header_macro(
   unistd
   ../libc/include/unistd.yaml
-  unistd.h.def
   unistd.h
   DEPENDS
     .llvm_libc_common_h
@@ -386,7 +356,6 @@ add_header_macro(
 add_header_macro(
   pthread
   ../libc/include/pthread.yaml
-  pthread.h.def
   pthread.h
   DEPENDS
     .llvm-libc-macros.pthread_macros
@@ -410,7 +379,6 @@ add_header_macro(
 add_header_macro(
   sched
   ../libc/include/sched.yaml
-  sched.h.def
   sched.h
   DEPENDS
     .llvm_libc_common_h
@@ -427,7 +395,6 @@ add_header_macro(
 add_header_macro(
   spawn
   ../libc/include/spawn.yaml
-  spawn.h.def
   spawn.h
   DEPENDS
     .llvm_libc_common_h
@@ -440,7 +407,6 @@ add_header_macro(
 add_header_macro(
   link
   ../libc/include/link.yaml
-  link.h.def
   link.h
   DEPENDS
     .llvm_libc_common_h
@@ -450,7 +416,6 @@ add_header_macro(
 add_header_macro(
   elf
   ../libc/include/elf.yaml
-  elf.h.def
   elf.h
   DEPENDS
     .llvm-libc-macros.elf_macros
@@ -464,7 +429,6 @@ file(MAKE_DIRECTORY ${LIBC_INCLUDE_DIR}/sys)
 add_header_macro(
   sys_auxv
   ../libc/include/sys/auxv.yaml
-  sys/auxv.h.def
   sys/auxv.h
   DEPENDS
     .llvm_libc_common_h
@@ -474,7 +438,6 @@ add_header_macro(
 add_header_macro(
   sys_epoll
   ../libc/include/sys/epoll.yaml
-  sys/epoll.h.def
   sys/epoll.h
   DEPENDS
     .llvm_libc_common_h
@@ -487,7 +450,6 @@ add_header_macro(
 add_header_macro(
   sys_ioctl
   ../libc/include/sys/ioctl.yaml
-  sys/ioctl.h.def
   sys/ioctl.h
   DEPENDS
     .llvm_libc_common_h
@@ -497,7 +459,6 @@ add_header_macro(
 add_header_macro(
   sys_mman
   ../libc/include/sys/mman.yaml
-  sys/mman.h.def
   sys/mman.h
   DEPENDS
     .llvm_libc_common_h
@@ -510,7 +471,6 @@ add_header_macro(
 add_header_macro(
   sys_prctl
   ../libc/include/sys/prctl.yaml
-  sys/prctl.h.def
   sys/prctl.h
   DEPENDS
     .llvm_libc_common_h
@@ -527,7 +487,6 @@ add_header(
 add_header_macro(
   sys_random
   ../libc/include/sys/random.yaml
-  sys/random.h.def
   sys/random.h
   DEPENDS
     .llvm_libc_common_h
@@ -539,7 +498,6 @@ add_header_macro(
 add_header_macro(
   sys_resource
   ../libc/include/sys/resource.yaml
-  sys/resource.h.def
   sys/resource.h
   DEPENDS
     .llvm_libc_common_h
@@ -551,7 +509,6 @@ add_header_macro(
 add_header_macro(
   sys_stat
   ../libc/include/sys/stat.yaml
-  sys/stat.h.def
   sys/stat.h
   DEPENDS
     .llvm_libc_common_h
@@ -573,7 +530,6 @@ add_header_macro(
 add_header_macro(
   sys_select
   ../libc/include/sys/select.yaml
-  sys/select.h.def
   sys/select.h
   DEPENDS
     .llvm_libc_common_h
@@ -589,7 +545,6 @@ add_header_macro(
 add_header_macro(
   sys_sendfile
   ../libc/include/sys/sendfile.yaml
-  sys/sendfile.h.def
   sys/sendfile.h
   DEPENDS
     .llvm_libc_common_h
@@ -601,7 +556,6 @@ add_header_macro(
 add_header_macro(
   sys_socket
   ../libc/include/sys/socket.yaml
-  sys/socket.h.def
   sys/socket.h
   DEPENDS
     .llvm_libc_common_h
@@ -617,7 +571,6 @@ add_header_macro(
 add_header_macro(
   sys_statvfs
   ../libc/include/sys/statvfs.yaml
-  sys/statvfs.h.def
   sys/statvfs.h
   DEPENDS
     .llvm_libc_common_h
@@ -627,7 +580,6 @@ add_header_macro(
 add_header_macro(
   sys_syscall
   ../libc/include/sys/syscall.yaml
-  sys/syscall.h.def
   sys/syscall.h
   DEPENDS
 )
@@ -635,7 +587,6 @@ add_header_macro(
 add_header_macro(
   sys_time
   ../libc/include/sys/time.yaml
-  sys/time.h.def
   sys/time.h
   DEPENDS
     .llvm_libc_common_h
@@ -646,7 +597,6 @@ add_header_macro(
 add_header_macro(
   sys_types
   ../libc/include/sys/types.yaml
-  sys/types.h.def
   sys/types.h
   DEPENDS
     .llvm_libc_common_h
@@ -676,7 +626,6 @@ add_header_macro(
 add_header_macro(
   sys_utsname
   ../libc/include/sys/utsname.yaml
-  sys/utsname.h.def
   sys/utsname.h
   DEPENDS
     .llvm_libc_common_h
@@ -686,7 +635,6 @@ add_header_macro(
 add_header_macro(
   sys_wait
   ../libc/include/sys/wait.yaml
-  sys/wait.h.def
   sys/wait.h
   DEPENDS
     .llvm_libc_common_h
@@ -699,7 +647,6 @@ add_header_macro(
 add_header_macro(
   termios
   ../libc/include/termios.yaml
-  termios.h.def
   termios.h
   DEPENDS
     .llvm_libc_common_h
@@ -714,7 +661,6 @@ add_header_macro(
 add_header_macro(
   uchar
   ../libc/include/uchar.yaml
-  uchar.h.def
   uchar.h
   DEPENDS
     .llvm_libc_common_h
@@ -727,7 +673,6 @@ add_header_macro(
 add_header_macro(
   wchar
   ../libc/include/wchar.yaml
-  wchar.h.def
   wchar.h
   DEPENDS
     .llvm_libc_common_h
@@ -741,7 +686,6 @@ add_header_macro(
 add_header_macro(
   locale
   ../libc/include/locale.yaml
-  locale.h.def
   locale.h
   DEPENDS
     .llvm_libc_common_h
diff --git a/libc/include/__llvm-libc-common.h b/libc/include/__llvm-libc-common.h
index d9d70aff771c..c63eb134a5e5 100644
--- a/libc/include/__llvm-libc-common.h
+++ b/libc/include/__llvm-libc-common.h
@@ -50,7 +50,14 @@
 #define __END_C_DECLS
 
 #undef __restrict
-#define __restrict restrict // C99 and above support the restrict keyword.
+#if __STDC_VERSION__ >= 199901L
+// C99 and above support the restrict keyword.
+#define __restrict restrict
+#elif !defined(__GNUC__)
+// GNU-compatible compilers accept the __ spelling in all modes.
+// Otherwise, omit the qualifier for pure C89 compatibility.
+#define __restrict
+#endif
 
 #undef _Noreturn
 #if __STDC_VERSION__ >= 201112L
diff --git a/libc/include/arpa/inet.yaml b/libc/include/arpa/inet.yaml
index cb366e0f5d69..10cd56d6ce78 100644
--- a/libc/include/arpa/inet.yaml
+++ b/libc/include/arpa/inet.yaml
@@ -1,4 +1,5 @@
-header: arpa-inet.h
+header: arpa/inet.h
+header_template: inet.h.def
 macros: []
 types: []
 enums: []
diff --git a/libc/include/assert.yaml b/libc/include/assert.yaml
index f740554488ed..1a3bdeda7e54 100644
--- a/libc/include/assert.yaml
+++ b/libc/include/assert.yaml
@@ -1,4 +1,5 @@
 header: assert.h
+header_template: assert.h.def
 macros: []
 types: []
 enums: []
diff --git a/libc/include/complex.yaml b/libc/include/complex.yaml
index cd81de7dd9e2..05318480a02f 100644
--- a/libc/include/complex.yaml
+++ b/libc/include/complex.yaml
@@ -1,4 +1,5 @@
 header: complex.h
+header_template: complex.h.def
 macros: []
 types:
   - type_name: cfloat16
diff --git a/libc/include/ctype.yaml b/libc/include/ctype.yaml
index b4823c3e5323..6238f1b88998 100644
--- a/libc/include/ctype.yaml
+++ b/libc/include/ctype.yaml
@@ -1,4 +1,5 @@
 header: ctype.h
+header_template: ctype.h.def
 macros: []
 types:
   - type_name: locale_t
diff --git a/libc/include/dirent.yaml b/libc/include/dirent.yaml
index cdccf6a0c7f2..3fc522fda80e 100644
--- a/libc/include/dirent.yaml
+++ b/libc/include/dirent.yaml
@@ -1,4 +1,5 @@
 header: dirent.h
+header_template: dirent.h.def
 macros: []
 types:
   - type_name: struct_dirent
diff --git a/libc/include/dlfcn.yaml b/libc/include/dlfcn.yaml
index 725ee705714a..9e8803cb5fa7 100644
--- a/libc/include/dlfcn.yaml
+++ b/libc/include/dlfcn.yaml
@@ -1,4 +1,5 @@
 header: dlfcn.h
+header_template: dlfcn.h.def
 macros:
   - macro_name: RTLD_LAZY
     macro_value: null
diff --git a/libc/include/elf.yaml b/libc/include/elf.yaml
index 2e9db329e229..f78ae82c7785 100644
--- a/libc/include/elf.yaml
+++ b/libc/include/elf.yaml
@@ -1,4 +1,5 @@
 header: elf.h
+header_template: elf.h.def
 standards:
   - Linux
 macros: []
diff --git a/libc/include/errno.yaml b/libc/include/errno.yaml
index a894063a1ee2..188a9fa1211a 100644
--- a/libc/include/errno.yaml
+++ b/libc/include/errno.yaml
@@ -1,4 +1,5 @@
 header: errno.h
+header_template: errno.h.def
 standards:
   - stdc
   - Linux
diff --git a/libc/include/fcntl.yaml b/libc/include/fcntl.yaml
index 71c0df3b0fad..78f93533b84d 100644
--- a/libc/include/fcntl.yaml
+++ b/libc/include/fcntl.yaml
@@ -1,4 +1,5 @@
 header: fcntl.h
+header_template: fcntl.h.def
 macros: []
 types:
   - type_name: off_t
diff --git a/libc/include/features.yaml b/libc/include/features.yaml
index a18af22edb74..726320a40881 100644
--- a/libc/include/features.yaml
+++ b/libc/include/features.yaml
@@ -1,4 +1,5 @@
 header: features.h
+header_template: features.h.def
 standards:
   - stdc
 macros: []
diff --git a/libc/include/fenv.yaml b/libc/include/fenv.yaml
index 1010efc6402c..1ecaf6308550 100644
--- a/libc/include/fenv.yaml
+++ b/libc/include/fenv.yaml
@@ -1,4 +1,5 @@
 header: fenv.h
+header_template: fenv.h.def
 macros: []
 types:
   - type_name: fenv_t
diff --git a/libc/include/float.yaml b/libc/include/float.yaml
index 63639a6e8ed1..21df6513e77e 100644
--- a/libc/include/float.yaml
+++ b/libc/include/float.yaml
@@ -1,4 +1,5 @@
 header: float.h
+header_template: float.h.def
 standards:
   - stdc
 macros: []
diff --git a/libc/include/inttypes.yaml b/libc/include/inttypes.yaml
index ad636cc5121a..d5dec5b465ba 100644
--- a/libc/include/inttypes.yaml
+++ b/libc/include/inttypes.yaml
@@ -1,4 +1,5 @@
 header: inttypes.h
+header_template: inttypes.h.def
 macros: []
 types:
   - type_name: imaxdiv_t
diff --git a/libc/include/limits.yaml b/libc/include/limits.yaml
index bf33ed24e7a8..b664041bb56c 100644
--- a/libc/include/limits.yaml
+++ b/libc/include/limits.yaml
@@ -1,4 +1,5 @@
 header: limits.h
+header_template: limits.h.def
 standards:
   - stdc
 macros: []
diff --git a/libc/include/link.yaml b/libc/include/link.yaml
index d1963a86813a..1cd609e292b5 100644
--- a/libc/include/link.yaml
+++ b/libc/include/link.yaml
@@ -1,4 +1,5 @@
 header: link.h
+header_template: link.h.def
 standards:
   - Linux
 macros: []
diff --git a/libc/include/locale.yaml b/libc/include/locale.yaml
index 7da7966ea730..9ff53c16398a 100644
--- a/libc/include/locale.yaml
+++ b/libc/include/locale.yaml
@@ -1,4 +1,5 @@
 header: locale.h
+header_template: locale.h.def
 functions:
   - name: localeconv
     standards:
diff --git a/libc/include/malloc.yaml b/libc/include/malloc.yaml
index 8db4f3aebb9b..ec73c9090f72 100644
--- a/libc/include/malloc.yaml
+++ b/libc/include/malloc.yaml
@@ -1,4 +1,5 @@
 header: malloc.h
+header_template: malloc.h.def
 macros: []
 types: []
 enums: []
diff --git a/libc/include/math.yaml b/libc/include/math.yaml
index 3b8caec66bbf..831d04574567 100644
--- a/libc/include/math.yaml
+++ b/libc/include/math.yaml
@@ -1,4 +1,5 @@
 header: math.h
+header_template: math.h.def
 macros: []
 types:
   - type_name: float_t
diff --git a/libc/include/pthread.yaml b/libc/include/pthread.yaml
index b9068c3f1765..4f386bdd11cf 100644
--- a/libc/include/pthread.yaml
+++ b/libc/include/pthread.yaml
@@ -1,4 +1,5 @@
 header: pthread.h
+header_template: pthread.h.def
 macros: []
 types:
   - type_name: pthread_t
diff --git a/libc/include/sched.yaml b/libc/include/sched.yaml
index 2d4876b722ab..57871f524bf1 100644
--- a/libc/include/sched.yaml
+++ b/libc/include/sched.yaml
@@ -1,4 +1,5 @@
 header: sched.h
+header_template: sched.h.def
 macros: []
 types:
   - type_name: struct_timespec
diff --git a/libc/include/search.yaml b/libc/include/search.yaml
index a0c73bc679d8..b7ce06d48e70 100644
--- a/libc/include/search.yaml
+++ b/libc/include/search.yaml
@@ -1,4 +1,5 @@
 header: search.h
+header_template: search.h.def
 macros: []
 types:
   - type_name: struct_hsearch_data
diff --git a/libc/include/setjmp.yaml b/libc/include/setjmp.yaml
index 68e3ff046e4b..2c4f7fb6dfcc 100644
--- a/libc/include/setjmp.yaml
+++ b/libc/include/setjmp.yaml
@@ -1,4 +1,5 @@
 header: setjmp.h
+header_template: setjmp.h.def
 macros: []
 types:
   - type_name: jmp_buf
diff --git a/libc/include/signal.yaml b/libc/include/signal.yaml
index c66abb1a8744..576e77576ac7 100644
--- a/libc/include/signal.yaml
+++ b/libc/include/signal.yaml
@@ -1,4 +1,5 @@
 header: signal.h
+header_template: signal.h.def
 macros: []
 types:
   - type_name: pid_t
diff --git a/libc/include/spawn.yaml b/libc/include/spawn.yaml
index be3f4e99d27f..e725ab9719ed 100644
--- a/libc/include/spawn.yaml
+++ b/libc/include/spawn.yaml
@@ -1,4 +1,5 @@
 header: spawn.h
+header_template: spawn.h.def
 macros: []
 types:
   - type_name: posix_spawn_file_actions_t
diff --git a/libc/include/stdbit.yaml b/libc/include/stdbit.yaml
index 25d2d326c30e..e9bd6b3918e7 100644
--- a/libc/include/stdbit.yaml
+++ b/libc/include/stdbit.yaml
@@ -1,4 +1,5 @@
 header: stdbit.h
+header_template: stdbit.h.def
 macros: []
 types: []
 enums: []
diff --git a/libc/include/stdckdint.yaml b/libc/include/stdckdint.yaml
index ea8fc47625b0..e8b2e80ee029 100644
--- a/libc/include/stdckdint.yaml
+++ b/libc/include/stdckdint.yaml
@@ -1,4 +1,5 @@
 header: stdckdint.h
+header_template: stdckdint.h.def
 standards:
   - stdc
 macros: []
diff --git a/libc/include/stdfix.yaml b/libc/include/stdfix.yaml
index 9787eaba45e4..7b3bdba082dd 100644
--- a/libc/include/stdfix.yaml
+++ b/libc/include/stdfix.yaml
@@ -1,4 +1,5 @@
 header: stdfix.h
+header_template: stdfix.h.def
 macros: []
 types: 
   - type_name: stdfix-types
diff --git a/libc/include/stdint.yaml b/libc/include/stdint.yaml
index 8887f596bc8a..d583a104af37 100644
--- a/libc/include/stdint.yaml
+++ b/libc/include/stdint.yaml
@@ -1,4 +1,5 @@
 header: stdint.h
+header_template: stdint.h.def
 standards:
   - stdc
 macros: []
diff --git a/libc/include/stdio.yaml b/libc/include/stdio.yaml
index fd116bbc0089..2619984cca26 100644
--- a/libc/include/stdio.yaml
+++ b/libc/include/stdio.yaml
@@ -1,4 +1,5 @@
 header: stdio.h
+header_template: stdio.h.def
 macros:
   - macro_name: stdout
     macro_value: stdout
diff --git a/libc/include/stdlib.yaml b/libc/include/stdlib.yaml
index c6c95e421cee..4b68f272613b 100644
--- a/libc/include/stdlib.yaml
+++ b/libc/include/stdlib.yaml
@@ -1,4 +1,5 @@
 header: stdlib.h
+header_template: stdlib.h.def
 standards:
   - stdc
 macros: []
diff --git a/libc/include/string.yaml b/libc/include/string.yaml
index af1750e91243..deded309abc2 100644
--- a/libc/include/string.yaml
+++ b/libc/include/string.yaml
@@ -1,4 +1,5 @@
 header: string.h
+header_template: string.h.def
 macros: []
 types:
   - type_name: size_t
diff --git a/libc/include/strings.yaml b/libc/include/strings.yaml
index ca91b626740c..e672dca6a94d 100644
--- a/libc/include/strings.yaml
+++ b/libc/include/strings.yaml
@@ -1,4 +1,5 @@
 header: strings.h
+header_template: strings.h.def
 macros: []
 types: []
 enums: []
diff --git a/libc/include/sys/auxv.yaml b/libc/include/sys/auxv.yaml
index 9d546b358824..82ecee75c40a 100644
--- a/libc/include/sys/auxv.yaml
+++ b/libc/include/sys/auxv.yaml
@@ -1,4 +1,5 @@
-header: sys-auxv.h
+header: sys/auxv.h
+header_template: auxv.h.def
 macros: []
 types: []
 enums: []
diff --git a/libc/include/sys/epoll.yaml b/libc/include/sys/epoll.yaml
index ee188c17fedc..996eb785bc71 100644
--- a/libc/include/sys/epoll.yaml
+++ b/libc/include/sys/epoll.yaml
@@ -1,4 +1,5 @@
-header: sys-epoll.h
+header: sys/epoll.h
+header_template: epoll.h.def
 macros: []
 types:
   - type_name: struct_epoll_event
diff --git a/libc/include/sys/ioctl.yaml b/libc/include/sys/ioctl.yaml
index ffe73a84d51b..5f7b7f333191 100644
--- a/libc/include/sys/ioctl.yaml
+++ b/libc/include/sys/ioctl.yaml
@@ -1,4 +1,5 @@
-header: sys-ioctl.h
+header: sys/ioctl.h
+header_template: ioctl.h.def
 standards: POSIX
 macros: []
 types: []
diff --git a/libc/include/sys/mman.yaml b/libc/include/sys/mman.yaml
index 962ca3591917..8c207552f980 100644
--- a/libc/include/sys/mman.yaml
+++ b/libc/include/sys/mman.yaml
@@ -1,4 +1,5 @@
-header: sys-mman.h
+header: sys/mman.h
+header_template: mman.h.def
 macros: []
 types:
   - type_name: mode_t
diff --git a/libc/include/sys/prctl.yaml b/libc/include/sys/prctl.yaml
index 82374be87d5d..53f57645b18e 100644
--- a/libc/include/sys/prctl.yaml
+++ b/libc/include/sys/prctl.yaml
@@ -1,4 +1,5 @@
-header: sys-prctl.h
+header: sys/prctl.h
+header_template: prctl.h.def
 macros: []
 types: []
 enums: []
diff --git a/libc/include/sys/random.yaml b/libc/include/sys/random.yaml
index 228bb50d5db9..4efb2fbb4473 100644
--- a/libc/include/sys/random.yaml
+++ b/libc/include/sys/random.yaml
@@ -1,4 +1,5 @@
-header: sys-random.h
+header: sys/random.h
+header_template: random.h.def
 macros: []
 types:
   - type_name: ssize_t
diff --git a/libc/include/sys/resource.yaml b/libc/include/sys/resource.yaml
index 85ea1ad12f19..3652d6d490a4 100644
--- a/libc/include/sys/resource.yaml
+++ b/libc/include/sys/resource.yaml
@@ -1,4 +1,5 @@
-header: sys-resource.h
+header: sys/resource.h
+header_template: resource.h.def
 macros: []
 types:
   - type_name: struct_rlimit
diff --git a/libc/include/sys/select.yaml b/libc/include/sys/select.yaml
index c6806122aa81..6066fd341f07 100644
--- a/libc/include/sys/select.yaml
+++ b/libc/include/sys/select.yaml
@@ -1,4 +1,5 @@
-header: sys-select.h
+header: sys/select.h
+header_template: select.h.def
 macros: []
 types:
   - type_name: struct_timeval
diff --git a/libc/include/sys/sendfile.yaml b/libc/include/sys/sendfile.yaml
index 7e45e40e171d..259ab83dff54 100644
--- a/libc/include/sys/sendfile.yaml
+++ b/libc/include/sys/sendfile.yaml
@@ -1,4 +1,5 @@
-header: sys-sendfile.h
+header: sys/sendfile.h
+header_template: sendfile.h.def
 macros: []
 types:
   - type_name: ssize_t
diff --git a/libc/include/sys/socket.yaml b/libc/include/sys/socket.yaml
index 47d835fa5f4a..00d5de6af8a8 100644
--- a/libc/include/sys/socket.yaml
+++ b/libc/include/sys/socket.yaml
@@ -1,4 +1,5 @@
-header: sys-socket.h
+header: sys/socket.h
+header_template: socket.h.def
 macros: []
 types:
   - type_name: struct_sockaddr_un
diff --git a/libc/include/sys/stat.yaml b/libc/include/sys/stat.yaml
index ed500f832f90..7f013420818a 100644
--- a/libc/include/sys/stat.yaml
+++ b/libc/include/sys/stat.yaml
@@ -1,4 +1,5 @@
-header: sys-stat.h
+header: sys/stat.h
+header_template: stat.h.def
 macros: []
 types:
   - type_name: blkcnt_t
diff --git a/libc/include/sys/statvfs.yaml b/libc/include/sys/statvfs.yaml
index 22e0ef22c413..8c1d254add37 100644
--- a/libc/include/sys/statvfs.yaml
+++ b/libc/include/sys/statvfs.yaml
@@ -1,4 +1,5 @@
-header: sys-statvfs.h
+header: sys/statvfs.h
+header_template: statvfs.h.def
 macros: []
 types:
   - type_name: struct_statvfs
diff --git a/libc/include/sys/syscall.yaml b/libc/include/sys/syscall.yaml
index c0a64338b6f7..879d95c2ea39 100644
--- a/libc/include/sys/syscall.yaml
+++ b/libc/include/sys/syscall.yaml
@@ -1,4 +1,5 @@
-header: sys-syscall.h
+header: sys/syscall.h
+header_template: syscall.h.def
 standards: Linux
 macros: []
 types: []
diff --git a/libc/include/sys/time.yaml b/libc/include/sys/time.yaml
index eb3dd548389b..687c1f83028d 100644
--- a/libc/include/sys/time.yaml
+++ b/libc/include/sys/time.yaml
@@ -1,4 +1,5 @@
-header: sys-time.h
+header: sys/time.h
+header_template: time.h.def
 standards: Linux
 macros: []
 types: []
diff --git a/libc/include/sys/types.yaml b/libc/include/sys/types.yaml
index 15eaf107f691..6fa0b448fcd3 100644
--- a/libc/include/sys/types.yaml
+++ b/libc/include/sys/types.yaml
@@ -1,4 +1,5 @@
-header: sys-types.h
+header: sys/types.h
+header_template: types.h.def
 standards: POSIX
 macros: []
 types:
diff --git a/libc/include/sys/utsname.yaml b/libc/include/sys/utsname.yaml
index eecd55b18082..6c7cb71f9a34 100644
--- a/libc/include/sys/utsname.yaml
+++ b/libc/include/sys/utsname.yaml
@@ -1,4 +1,5 @@
-header: sys-utsname.h
+header: sys/utsname.h
+header_template: utsname.h.def
 macros: []
 types:
   - type_name: struct_utsname
diff --git a/libc/include/sys/wait.yaml b/libc/include/sys/wait.yaml
index 4f0c69baee2c..6257e34b9e08 100644
--- a/libc/include/sys/wait.yaml
+++ b/libc/include/sys/wait.yaml
@@ -1,4 +1,5 @@
-header: sys-wait.h
+header: sys/wait.h
+header_template: wait.h.def
 macros: []
 types:
   - type_name: siginfo_t
diff --git a/libc/include/termios.yaml b/libc/include/termios.yaml
index e9c4cd375d0b..8815097264f9 100644
--- a/libc/include/termios.yaml
+++ b/libc/include/termios.yaml
@@ -1,4 +1,5 @@
 header: termios.h
+header_template: termios.h.def
 macros: []
 types:
   - type_name: tcflag_t
diff --git a/libc/include/threads.yaml b/libc/include/threads.yaml
index aadcaf5f66e0..7014822f9251 100644
--- a/libc/include/threads.yaml
+++ b/libc/include/threads.yaml
@@ -1,4 +1,5 @@
 header: threads.h
+header_template: threads.h.def
 macros:
   - macro_name: ONCE_FLAG_INIT
     macro_value: '{0}'
diff --git a/libc/include/time.yaml b/libc/include/time.yaml
index 3f745e5ee338..b71b9ab72075 100644
--- a/libc/include/time.yaml
+++ b/libc/include/time.yaml
@@ -1,4 +1,5 @@
 header: time.h
+header_template: time.h.def
 macros: []
 types:
   - type_name: struct_timeval
diff --git a/libc/include/uchar.yaml b/libc/include/uchar.yaml
index 18ca840612e0..713919796762 100644
--- a/libc/include/uchar.yaml
+++ b/libc/include/uchar.yaml
@@ -1,4 +1,5 @@
 header: uchar.h
+header_template: uchar.h.def
 standards:
   - stdc
 macros: []
diff --git a/libc/include/unistd.yaml b/libc/include/unistd.yaml
index c6441c04ce3a..fada365e0103 100644
--- a/libc/include/unistd.yaml
+++ b/libc/include/unistd.yaml
@@ -1,4 +1,5 @@
 header: unistd.h
+header_template: unistd.h.def
 macros: []
 types:
   - type_name: uid_t
diff --git a/libc/include/wchar.yaml b/libc/include/wchar.yaml
index bc824b21d8be..27a5926b5745 100644
--- a/libc/include/wchar.yaml
+++ b/libc/include/wchar.yaml
@@ -1,4 +1,5 @@
 header: wchar.h
+header_template: wchar.h.def
 macros: []
 types:
   - type_name: size_t