gcc.git/libatomic/configure, branch master Unnamed repository; edit this file 'description' to name the repository. support Wild linker 2025-11-19T15:07:57+00:00 Martin Liska martin.liska@hey.com 2025-11-02T08:47:34+00:00 27450916cddca054bb30b22d48a981c48b1f110e gcc/ChangeLog: * collect2.cc (main): Add wild linker to -fuse-ld. * common.opt: Likewise. * configure: Regenerate. * configure.ac: Add detection for wild linker. * doc/invoke.texi: Document -fuse-ld=wild. * gcc.cc (driver_handle_option): Support -fuse-ld=wild. * opts.cc (common_handle_option): Likewise. libatomic/ChangeLog: * acinclude.m4: Add detection for wild linker. * configure: Regenerate. libgomp/ChangeLog: * acinclude.m4:: Add detection for wild linker. * configure: Regenerate. libitm/ChangeLog: * acinclude.m4:: Add detection for wild linker. * configure: Regenerate. libstdc++-v3/ChangeLog: * acinclude.m4:: Add detection for wild linker. * configure: Regenerate. Signed-off-by: Martin Liška <martin.liska@hey.com> 
gcc/ChangeLog:

	* collect2.cc (main): Add wild linker to -fuse-ld.
	* common.opt: Likewise.
	* configure: Regenerate.
	* configure.ac: Add detection for wild linker.
	* doc/invoke.texi: Document -fuse-ld=wild.
	* gcc.cc (driver_handle_option): Support -fuse-ld=wild.
	* opts.cc (common_handle_option): Likewise.

libatomic/ChangeLog:

	* acinclude.m4: Add detection for wild linker.
	* configure: Regenerate.

libgomp/ChangeLog:

	* acinclude.m4:: Add detection for wild linker.
	* configure: Regenerate.

libitm/ChangeLog:

	* acinclude.m4:: Add detection for wild linker.
	* configure: Regenerate.

libstdc++-v3/ChangeLog:

	* acinclude.m4:: Add detection for wild linker.
	* configure: Regenerate.

Signed-off-by: Martin Liška <martin.liska@hey.com>
LoongArch: Don't mix lock-free and locking 16B atomics 2025-11-13T15:22:18+00:00 Xi Ruoyao xry111@xry111.site 2025-11-06T13:32:54+00:00 1b6d733c9812c3e23155bfd0f41afd186921eeb7 As [1] says, we cannot mix up lock-free and locking atomics for one object. For example assume atom = (0, 0) initially, if we have a locking "atomic" xor running on T0 and a lock-free store running on T1 concurrently: T0 | T1 -----------------------------+------------------------------------- acquire_lock | t0 = atom[0] | /* some CPU cycles */ | atom = (1, 1) /* lock-free atomic */ t1 = atom[1] | t0 ^= 1 | t1 ^= 1 | atom[0] = t0 | atom[1] = t1 | release_lock | we get atom = (0, 1), but the atomicity of xor and store should guarantee that atom is either (0, 0) or (1, 1). So, if we want to use a lock-free 16B atomic operation, we need both LSX and SCQ even if that specific operation only needs one of them. To make things worse, one may link a TU compiled with -mlsx -mscq and another without them together, then if we want to use the lock-free 16B atomic operations in the former, we must make libatomic also use the lock-free 16B atomic operation for the latter so we need to add ifuncs for libatomic, similar to the discussion about i386 vs. i486 in [1]. Implementing and building the ifuncs currently requires: - Glibc, because the ifunc resolver interface is libc-specific - Linux, because the HWCAP bit for LSX is kernel-specific - A recent enough assembler at build time to recognize sc.q So the approach here is: only allow 16B lock-free atomic operations in the compiler if the criteria above is satisfied, and ensure libatomic to use those lock-free operations on capable hardware (via ifunc unless both LSX and SCQ are already enabled by the builder) if the compiler allows 16B lock-free atomic. [1]: https://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary gcc/ * configure.ac (HAVE_AS_16B_ATOMIC): Define if the assembler supports LSX and sc.q. * configure: Regenerate. * config.in: Regenerate. * config/loongarch/loongarch-opts.h (HAVE_AS_16B_ATOMIC): Defined to 0 if undefined yet. * config/loongarch/linux.h (HAVE_IFUNC_FOR_LIBATOMIC_16B): Define as HAVE_AS_16B_ATOMIC && OPTION_GLIBC. * config/loongarch/loongarch-protos.h (loongarch_16b_atomic_lock_free_p): New prototype. * config/loongarch/loongarch.cc (loongarch_16b_atomic_lock_free_p): Implement. * config/loongarch/sync.md (atomic_storeti_lsx): Require loongarch_16b_atomic_lock_free_p. (atomic_storeti): Likewise. (atomic_exchangeti_scq): Likewise. (atomic_exchangeti): Likewise. (atomic_compare_and_swapti): Likewise. (atomic_fetch_<amop_ti_fetch>ti_scq): Likewise. (atomic_fetch_<amop_ti_fetch>ti): Likewise. (ALL_SC): Likewise for TImode. (atomic_storeti_scq): Remove. libatomic/ * configure.ac (ARCH_LOONGARCH): New AM_CONDITIONAL. * Makefile.am (IFUNC_OPT): Separate the item from IFUNC_OPTIONS to allow using multiple options for an ISA variant. (libatomic_la_LIBADD): Add *_16_1_.lo for LoongArch. (IFUNC_OPTIONS): Build *_16_1_.lo for LoongArch with -mlsx and -mscq. * configure: Regenerate. * Makefile.in: Regenerate. * configure.tgt (try_ifunc): Set to yes for LoongArch if the compiler can produce lock-free 16B atomic with -mlsx -mscq. * config/loongarch/host-config.h: Implement ifunc selector. 
As [1] says, we cannot mix up lock-free and locking atomics for one
object.  For example assume atom = (0, 0) initially, if we have a
locking "atomic" xor running on T0 and a lock-free store running on T1
concurrently:

       T0                    |       T1
-----------------------------+-------------------------------------
 acquire_lock                |
 t0 = atom[0]                |
 /* some CPU cycles */       | atom = (1, 1) /* lock-free atomic */
 t1 = atom[1]                |
 t0 ^= 1                     |
 t1 ^= 1                     |
 atom[0] = t0                |
 atom[1] = t1                |
 release_lock                |

we get atom = (0, 1), but the atomicity of xor and store should
guarantee that atom is either (0, 0) or (1, 1).

So, if we want to use a lock-free 16B atomic operation, we need both LSX
and SCQ even if that specific operation only needs one of them.  To make
things worse, one may link a TU compiled with -mlsx -mscq and another
without them together, then if we want to use the lock-free 16B atomic
operations in the former, we must make libatomic also use the lock-free
16B atomic operation for the latter so we need to add ifuncs for
libatomic, similar to the discussion about i386 vs. i486 in [1].

Implementing and building the ifuncs currently requires:

- Glibc, because the ifunc resolver interface is libc-specific
- Linux, because the HWCAP bit for LSX is kernel-specific
- A recent enough assembler at build time to recognize sc.q

So the approach here is: only allow 16B lock-free atomic operations in
the compiler if the criteria above is satisfied, and ensure libatomic to
use those lock-free operations on capable hardware (via ifunc unless
both LSX and SCQ are already enabled by the builder) if the compiler
allows 16B lock-free atomic.

[1]: https://gcc.gnu.org/wiki/Atomic/GCCMM/LIbrary

gcc/
	* configure.ac (HAVE_AS_16B_ATOMIC): Define if the assembler
	supports LSX and sc.q.
	* configure: Regenerate.
	* config.in: Regenerate.
	* config/loongarch/loongarch-opts.h (HAVE_AS_16B_ATOMIC):
	Defined to 0 if undefined yet.
	* config/loongarch/linux.h (HAVE_IFUNC_FOR_LIBATOMIC_16B):
	Define as HAVE_AS_16B_ATOMIC && OPTION_GLIBC.
	* config/loongarch/loongarch-protos.h
	(loongarch_16b_atomic_lock_free_p): New prototype.
	* config/loongarch/loongarch.cc
	(loongarch_16b_atomic_lock_free_p): Implement.
	* config/loongarch/sync.md (atomic_storeti_lsx): Require
	loongarch_16b_atomic_lock_free_p.
	(atomic_storeti): Likewise.
	(atomic_exchangeti_scq): Likewise.
	(atomic_exchangeti): Likewise.
	(atomic_compare_and_swapti): Likewise.
	(atomic_fetch_<amop_ti_fetch>ti_scq): Likewise.
	(atomic_fetch_<amop_ti_fetch>ti): Likewise.
	(ALL_SC): Likewise for TImode.
	(atomic_storeti_scq): Remove.

libatomic/

	* configure.ac (ARCH_LOONGARCH): New AM_CONDITIONAL.
	* Makefile.am (IFUNC_OPT): Separate the item from IFUNC_OPTIONS
	to allow using multiple options for an ISA variant.
	(libatomic_la_LIBADD): Add *_16_1_.lo for LoongArch.
	(IFUNC_OPTIONS): Build *_16_1_.lo for LoongArch with -mlsx and
	-mscq.
	* configure: Regenerate.
	* Makefile.in: Regenerate.
	* configure.tgt (try_ifunc): Set to yes for LoongArch if the
	compiler can produce lock-free 16B atomic with -mlsx -mscq.
	* config/loongarch/host-config.h: Implement ifunc selector.
gcc: sync top-level with binutils-gdb 2025-11-03T20:25:00+00:00 Sam James sam@gentoo.org 2025-11-03T09:48:00+00:00 f8bb20167f81271f2309f15c4d1563a2173a79ca This just pulls in Alan's: commit 87b6078fc212ccba5f043399c6370ee20f6b355a Author: Alan Modra <amodra@gmail.com> AuthorDate: Mon Nov 3 10:59:50 2025 +1030 Commit: Alan Modra <amodra@gmail.com> CommitDate: Mon Nov 3 10:59:50 2025 +1030 tidy m4 plugin config support ... It tidies up the configure test output. config/ChangeLog: * clang-plugin.m4: Sync with binutils. * gcc-plugin.m4: Ditto. ChangeLog: * configure: Regenerate. gcc/ChangeLog: * configure: Regenerate. libatomic/ChangeLog: * configure: Regenerate. libbacktrace/ChangeLog: * configure: Regenerate. libcc1/ChangeLog: * configure: Regenerate. libffi/ChangeLog: * configure: Regenerate. libgcobol/ChangeLog: * configure: Regenerate. libgfortran/ChangeLog: * configure: Regenerate. libgm2/ChangeLog: * configure: Regenerate. libgomp/ChangeLog: * configure: Regenerate. libgrust/ChangeLog: * configure: Regenerate. libiberty/ChangeLog: * configure: Regenerate. libitm/ChangeLog: * configure: Regenerate. libobjc/ChangeLog: * configure: Regenerate. libphobos/ChangeLog: * configure: Regenerate. libquadmath/ChangeLog: * configure: Regenerate. libsanitizer/ChangeLog: * configure: Regenerate. libssp/ChangeLog: * configure: Regenerate. libstdc++-v3/ChangeLog: * configure: Regenerate. libvtv/ChangeLog: * configure: Regenerate. lto-plugin/ChangeLog: * configure: Regenerate. zlib/ChangeLog: * configure: Regenerate. 
This just pulls in Alan's:

commit 87b6078fc212ccba5f043399c6370ee20f6b355a
Author:     Alan Modra <amodra@gmail.com>
AuthorDate: Mon Nov 3 10:59:50 2025 +1030
Commit:     Alan Modra <amodra@gmail.com>
CommitDate: Mon Nov 3 10:59:50 2025 +1030

    tidy m4 plugin config support

    ...

It tidies up the configure test output.

config/ChangeLog:

	* clang-plugin.m4: Sync with binutils.
	* gcc-plugin.m4: Ditto.

ChangeLog:

	* configure: Regenerate.

gcc/ChangeLog:

	* configure: Regenerate.

libatomic/ChangeLog:

	* configure: Regenerate.

libbacktrace/ChangeLog:

	* configure: Regenerate.

libcc1/ChangeLog:

	* configure: Regenerate.

libffi/ChangeLog:

	* configure: Regenerate.

libgcobol/ChangeLog:

	* configure: Regenerate.

libgfortran/ChangeLog:

	* configure: Regenerate.

libgm2/ChangeLog:

	* configure: Regenerate.

libgomp/ChangeLog:

	* configure: Regenerate.

libgrust/ChangeLog:

	* configure: Regenerate.

libiberty/ChangeLog:

	* configure: Regenerate.

libitm/ChangeLog:

	* configure: Regenerate.

libobjc/ChangeLog:

	* configure: Regenerate.

libphobos/ChangeLog:

	* configure: Regenerate.

libquadmath/ChangeLog:

	* configure: Regenerate.

libsanitizer/ChangeLog:

	* configure: Regenerate.

libssp/ChangeLog:

	* configure: Regenerate.

libstdc++-v3/ChangeLog:

	* configure: Regenerate.

libvtv/ChangeLog:

	* configure: Regenerate.

lto-plugin/ChangeLog:

	* configure: Regenerate.

zlib/ChangeLog:

	* configure: Regenerate.
PR81358: Enable automatic linking of libatomic. 2025-10-09T07:26:51+00:00 Prathamesh Kulkarni prathameshk@nvidia.com 2025-10-09T07:07:24+00:00 e63cf4b130b86dd7dde1bf499d3d40faca10ea2e ChangeLog: PR driver/81358 * Makefile.def: Add no_atomic=true for libraries that don't depend on libatomic. * Makefile.tpl: Export TARGET_CONFIGDIRS and create rule to add dependencies for libatomic. * configure.ac: Add libatomic to bootstrap_target_libs. * Makefile.in: Regenerate. * configure: Regenerate. gcc/ChangeLog: PR driver/81358 * common.opt: New option -flink-libatomic. * gcc.cc (LINK_LIBATOMIC_SPEC): New macro. * config/alpha/linux.h (LINK_GCC_C_SEQUENCE_SPEC): Use LINK_LIBATOMIC_SPEC. * config/arm/uclinux-elf.h: Likewise. * config/arm/unknown-elf.h: Likewise. * config/avr/avrlibc.h: Likewise. * config/bfin/linux.h: Likewise. * config/darwin.h: Likewise. * config/gnu-user.h: Likewise. * config/lm32/uclinux-elf.h: Likewise. * config/rs6000/linux64.h: Likewise. * config/rs6000/rtems.h: Likewise. * config/sparc/sparc.h: Likewise. * doc/invoke.texi: Document -flink-libatomic. * configure.ac: Define TARGET_PROVIDES_LIBATOMIC. * configure: Regenerate. * config.in: Regenerate. * common.opt.urls: Regenerate. libatomic/ChangeLog: PR driver/81358 * Makefile.am: Pass -fno-link-libatomic. New rule all-local. * configure.ac: Assert that CFLAGS is set and pass -fno-link-libatomic. Use __libatomic_save_CFLAGS__ instead of save_CFLAGS. * Makefile.in: Regenerate. * configure: Regenerate. Signed-off-by: Prathamesh Kulkarni <prathameshk@nvidia.com> Co-authored-by: Matthew Malcolmson <mmalcolmson@nvidia.com> 
ChangeLog:
	PR driver/81358
	* Makefile.def: Add no_atomic=true for libraries that don't depend on
	libatomic.
	* Makefile.tpl: Export TARGET_CONFIGDIRS and create rule to
	add dependencies for libatomic.
	* configure.ac: Add libatomic to bootstrap_target_libs.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

gcc/ChangeLog:
	PR driver/81358
	* common.opt: New option -flink-libatomic.
	* gcc.cc (LINK_LIBATOMIC_SPEC): New macro.
	* config/alpha/linux.h (LINK_GCC_C_SEQUENCE_SPEC): Use LINK_LIBATOMIC_SPEC.
	* config/arm/uclinux-elf.h: Likewise.
	* config/arm/unknown-elf.h: Likewise.
	* config/avr/avrlibc.h: Likewise.
	* config/bfin/linux.h: Likewise.
	* config/darwin.h: Likewise.
	* config/gnu-user.h: Likewise.
	* config/lm32/uclinux-elf.h: Likewise.
	* config/rs6000/linux64.h: Likewise.
	* config/rs6000/rtems.h: Likewise.
	* config/sparc/sparc.h: Likewise.
	* doc/invoke.texi: Document -flink-libatomic.
	* configure.ac: Define TARGET_PROVIDES_LIBATOMIC.
	* configure: Regenerate.
	* config.in: Regenerate.
	* common.opt.urls: Regenerate.

libatomic/ChangeLog:
	PR driver/81358
	* Makefile.am: Pass -fno-link-libatomic.
	New rule all-local.
	* configure.ac: Assert that CFLAGS is set and pass -fno-link-libatomic.
	Use __libatomic_save_CFLAGS__ instead of save_CFLAGS.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

Signed-off-by: Prathamesh Kulkarni <prathameshk@nvidia.com>
Co-authored-by: Matthew Malcolmson <mmalcolmson@nvidia.com>
*: regenerate autotools 2025-10-05T16:14:49+00:00 Sam James sam@gentoo.org 2025-10-05T16:12:21+00:00 ac273977adbe769c9d31708a403122e3b46365d8 libatomic/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * testsuite/Makefile.in: Regenerate. libcc1/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. libffi/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * include/Makefile.in: Regenerate. * man/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. libgcobol/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libgfortran/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libgm2/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * libm2cor/Makefile.in: Regenerate. * libm2iso/Makefile.in: Regenerate. * libm2log/Makefile.in: Regenerate. * libm2min/Makefile.in: Regenerate. * libm2pim/Makefile.in: Regenerate. libgomp/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * testsuite/Makefile.in: Regenerate. libgrust/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * libformat_parser/Makefile.in: Regenerate. * libproc_macro_internal/Makefile.in: Regenerate. libitm/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * testsuite/Makefile.in: Regenerate. libobjc/ChangeLog: * aclocal.m4: Regenerate. * configure: Regenerate. libphobos/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * libdruntime/Makefile.in: Regenerate. * src/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. libquadmath/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libsanitizer/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * asan/Makefile.in: Regenerate. * configure: Regenerate. * hwasan/Makefile.in: Regenerate. * interception/Makefile.in: Regenerate. * libbacktrace/Makefile.in: Regenerate. * lsan/Makefile.in: Regenerate. * sanitizer_common/Makefile.in: Regenerate. * tsan/Makefile.in: Regenerate. * ubsan/Makefile.in: Regenerate. libssp/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. libstdc++-v3/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * doc/Makefile.in: Regenerate. * include/Makefile.in: Regenerate. * libsupc++/Makefile.in: Regenerate. * po/Makefile.in: Regenerate. * python/Makefile.in: Regenerate. * src/Makefile.in: Regenerate. * src/c++11/Makefile.in: Regenerate. * src/c++17/Makefile.in: Regenerate. * src/c++20/Makefile.in: Regenerate. * src/c++23/Makefile.in: Regenerate. * src/c++26/Makefile.in: Regenerate. * src/c++98/Makefile.in: Regenerate. * src/experimental/Makefile.in: Regenerate. * src/filesystem/Makefile.in: Regenerate. * src/libbacktrace/Makefile.in: Regenerate. * testsuite/Makefile.in: Regenerate. libvtv/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. * testsuite/Makefile.in: Regenerate. lto-plugin/ChangeLog: * Makefile.in: Regenerate. * aclocal.m4: Regenerate. * configure: Regenerate. 
libatomic/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* testsuite/Makefile.in: Regenerate.

libcc1/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.

libffi/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* include/Makefile.in: Regenerate.
	* man/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.

libgcobol/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.

libgfortran/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.

libgm2/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* libm2cor/Makefile.in: Regenerate.
	* libm2iso/Makefile.in: Regenerate.
	* libm2log/Makefile.in: Regenerate.
	* libm2min/Makefile.in: Regenerate.
	* libm2pim/Makefile.in: Regenerate.

libgomp/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* testsuite/Makefile.in: Regenerate.

libgrust/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* libformat_parser/Makefile.in: Regenerate.
	* libproc_macro_internal/Makefile.in: Regenerate.

libitm/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* testsuite/Makefile.in: Regenerate.

libobjc/ChangeLog:

	* aclocal.m4: Regenerate.
	* configure: Regenerate.

libphobos/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* libdruntime/Makefile.in: Regenerate.
	* src/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.

libquadmath/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.

libsanitizer/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* asan/Makefile.in: Regenerate.
	* configure: Regenerate.
	* hwasan/Makefile.in: Regenerate.
	* interception/Makefile.in: Regenerate.
	* libbacktrace/Makefile.in: Regenerate.
	* lsan/Makefile.in: Regenerate.
	* sanitizer_common/Makefile.in: Regenerate.
	* tsan/Makefile.in: Regenerate.
	* ubsan/Makefile.in: Regenerate.

libssp/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.

libstdc++-v3/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* doc/Makefile.in: Regenerate.
	* include/Makefile.in: Regenerate.
	* libsupc++/Makefile.in: Regenerate.
	* po/Makefile.in: Regenerate.
	* python/Makefile.in: Regenerate.
	* src/Makefile.in: Regenerate.
	* src/c++11/Makefile.in: Regenerate.
	* src/c++17/Makefile.in: Regenerate.
	* src/c++20/Makefile.in: Regenerate.
	* src/c++23/Makefile.in: Regenerate.
	* src/c++26/Makefile.in: Regenerate.
	* src/c++98/Makefile.in: Regenerate.
	* src/experimental/Makefile.in: Regenerate.
	* src/filesystem/Makefile.in: Regenerate.
	* src/libbacktrace/Makefile.in: Regenerate.
	* testsuite/Makefile.in: Regenerate.

libvtv/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
	* testsuite/Makefile.in: Regenerate.

lto-plugin/ChangeLog:

	* Makefile.in: Regenerate.
	* aclocal.m4: Regenerate.
	* configure: Regenerate.
[vxworks] build partial libatomic 2025-05-22T18:15:31+00:00 Alexandre Oliva oliva@adacore.com 2025-05-22T18:15:31+00:00 10360c1b0d45ae129df616a9e9b1db5f2a2eaef8 Since vxworks' libc contains much of libatomic, in not-very-granular modules, building all of libatomic doesn't work very well. However, some expected entry points are not present in libc, so arrange for libatomic to build only those missing bits. for libatomic/ChangeLog * configure.tgt: Set partial_libatomic on *-*-vxworks*. * configure.ac (PARTIAL_VXWORKS): New AM_CONDITIONAL. * Makefile.am (libatomic_la_SOURCES): Select few sources for PARTIAL_VXWORKS. * configure, Makefile.in: Rebuilt. 
Since vxworks' libc contains much of libatomic, in not-very-granular
modules, building all of libatomic doesn't work very well.

However, some expected entry points are not present in libc, so
arrange for libatomic to build only those missing bits.


for  libatomic/ChangeLog

	* configure.tgt: Set partial_libatomic on *-*-vxworks*.
	* configure.ac (PARTIAL_VXWORKS): New AM_CONDITIONAL.
	* Makefile.am (libatomic_la_SOURCES): Select few sources for
	PARTIAL_VXWORKS.
	* configure, Makefile.in: Rebuilt.
Revert "PR81358: Enable automatic linking of libatomic." 2024-12-18T16:33:38+00:00 Prathamesh Kulkarni prathameshk@nvidia.com 2024-12-18T16:33:38+00:00 17d8a3da25cd5262df1075b210cb4fa707c527df This reverts commit e2f6ed54f75bbf8dd0292af90304890f06a9be17. 
This reverts commit e2f6ed54f75bbf8dd0292af90304890f06a9be17.
PR81358: Enable automatic linking of libatomic. 2024-12-18T11:33:51+00:00 Prathamesh Kulkarni prathameshk@nvidia.com 2024-12-18T11:33:51+00:00 e2f6ed54f75bbf8dd0292af90304890f06a9be17 ChangeLog: PR driver/81358 * Makefile.def: Add dependencies so libatomic is built before target libraries are configured. * Makefile.tpl: Export TARGET_CONFIGDIRS. * configure.ac: Add libatomic to bootstrap_target_libs. * Makefile.in: Regenerate. * configure: Regenerate. gcc/ChangeLog: PR driver/81358 * common.opt: New option -flink-libatomic. * gcc.cc (LINK_LIBATOMIC_SPEC): New macro. * config/gnu-user.h (GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC): Use LINK_LIBATOMIC_SPEC. * doc/invoke.texi: Document -flink-libatomic. * configure.ac: Define TARGET_PROVIDES_LIBATOMIC. * configure: Regenerate. * config.in: Regenerate. libatomic/ChangeLog: PR driver/81358 * Makefile.am: Pass -fno-link-libatomic. New rule all. * configure.ac: Assert that CFLAGS is set and pass -fno-link-libatomic. * Makefile.in: Regenerate. * configure: Regenerate. Signed-off-by: Prathamesh Kulkarni <prathameshk@nvidia.com> Co-authored-by: Matthew Malcolmson <mmalcolmson@nvidia.com> 
ChangeLog:
	PR driver/81358
	* Makefile.def: Add dependencies so libatomic is built before target
	libraries are configured.
	* Makefile.tpl: Export TARGET_CONFIGDIRS.
	* configure.ac: Add libatomic to bootstrap_target_libs.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

gcc/ChangeLog:
	PR driver/81358
	* common.opt: New option -flink-libatomic.
	* gcc.cc (LINK_LIBATOMIC_SPEC): New macro.
	* config/gnu-user.h (GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC): Use
	LINK_LIBATOMIC_SPEC.
	* doc/invoke.texi: Document -flink-libatomic.
	* configure.ac: Define TARGET_PROVIDES_LIBATOMIC.
	* configure: Regenerate.
	* config.in: Regenerate.

libatomic/ChangeLog:
	PR driver/81358
	* Makefile.am: Pass -fno-link-libatomic.
	New rule all.
	* configure.ac: Assert that CFLAGS is set and pass -fno-link-libatomic.
	* Makefile.in: Regenerate.
	* configure: Regenerate.

Signed-off-by: Prathamesh Kulkarni <prathameshk@nvidia.com>
Co-authored-by: Matthew Malcolmson <mmalcolmson@nvidia.com>
Libatomic: AArch64: Convert all lse128 assembly to .insn directives 2024-06-12T09:23:38+00:00 Victor Do Nascimento victor.donascimento@arm.com 2024-05-31T13:25:11+00:00 f6b9a064a295f5371901e2fac380d20e77cf7131 Given the lack of support for the LSE128 instructions in all but the the most up-to-date version of Binutils (2.42), having the build-time test for assembler support for these instructions often leads to the building of Libatomic without support for LSE128-dependent atomic function implementations. This ultimately leads to different people having different versions of Libatomic on their machines, depending on which assembler was available at compilation time. Furthermore, the conditional inclusion of these atomic function implementations predicated on assembler support leads to a series of `#if HAVE_FEAT_LSE128' guards scattered throughout the codebase and the need for a series of aliases when the feature flag evaluates to false. The preprocessor macro guards, together with the conditional aliasing leads to code that is cumbersome to understand and maintain. Both of the issues highlighted above will only get worse with the coming support for LRCPC3 atomics which under the current scheme will also require build-time checks. Consequently, a better option for both consistency across builds and code cleanness is to make recourse to the `.inst' directive. By replacing all novel assembly instructions for their hexadecimal representation within `.inst's, we ensure that the Libatomic code is both considerably cleaner and all machines build the same binary, irrespective of binutils version available at compile time. This patch therefore removes all configure checks for LSE128-support in the assembler and all the guards and aliases that were associated with `HAVE_FEAT_LSE128' libatomic/ChangeLog: * acinclude.m4 (LIBAT_TEST_FEAT_AARCH64_LSE128): Delete. * auto-config.h.in (HAVE_FEAT_LSE128): Likewise * config/linux/aarch64/atomic_16.S: Replace all LSE128 instructions with equivalent `.inst' directives. (HAVE_FEAT_LSE128): Remove all references. * configure: Regenerate. * configure.ac: Remove call to LIBAT_TEST_FEAT_AARCH64_LSE128. 
Given the lack of support for the LSE128 instructions in all but the
the most up-to-date version of Binutils (2.42), having the build-time
test for assembler support for these instructions often leads to the
building of Libatomic without support for LSE128-dependent atomic
function implementations.  This ultimately leads to different people
having different versions of Libatomic on their machines, depending on
which assembler was available at compilation time.

Furthermore, the conditional inclusion of these atomic function
implementations predicated on assembler support leads to a series of
`#if HAVE_FEAT_LSE128' guards scattered throughout the codebase and
the need for a series of aliases when the feature flag evaluates
to false.  The preprocessor macro guards, together with the
conditional aliasing leads to code that is cumbersome to understand
and maintain.

Both of the issues highlighted above will only get worse with the
coming support for LRCPC3 atomics which under the current scheme will
also require build-time checks.

Consequently, a better option for both consistency across builds and
code cleanness is to make recourse to the `.inst' directive.  By
replacing all novel assembly instructions for their hexadecimal
representation within `.inst's, we ensure that the Libatomic code is
both considerably cleaner and all machines build the same binary,
irrespective of binutils version available at compile time.

This patch therefore removes all configure checks for LSE128-support
in the assembler and all the guards and aliases that were associated
with `HAVE_FEAT_LSE128'

libatomic/ChangeLog:

	* acinclude.m4 (LIBAT_TEST_FEAT_AARCH64_LSE128): Delete.
	* auto-config.h.in (HAVE_FEAT_LSE128): Likewise
	* config/linux/aarch64/atomic_16.S: Replace all LSE128
	instructions with equivalent `.inst' directives.
	(HAVE_FEAT_LSE128): Remove all references.
	* configure: Regenerate.
	* configure.ac: Remove call to LIBAT_TEST_FEAT_AARCH64_LSE128.
libatomic: Regenerate configure properly 2024-04-05T10:15:06+00:00 Jakub Jelinek jakub@redhat.com 2024-04-05T10:15:06+00:00 9627cbbadbb935943c3d8336c057a021bbac2000 Seems configure hasn't been regenerated properly after the last acinclude.m4 change. 2024-04-05 Jakub Jelinek <jakub@redhat.com> * configure: Regenerate. 
Seems configure hasn't been regenerated properly after the last
acinclude.m4 change.

2024-04-05  Jakub Jelinek  <jakub@redhat.com>

	* configure: Regenerate.