[gcc r14-8988] PR other/113336: Fix libatomic testsuite regressions on ARM.

[gcc r14-8988] PR other/113336: Fix libatomic testsuite regressions on ARM.

[Roger Sayle]

https://gcc.gnu.org/g:ea7675761226b42e2deb7b320e9cc680512f4090

commit r14-8988-gea7675761226b42e2deb7b320e9cc680512f4090
Author: Roger Sayle <roger@nextmovesoftware.com>
Date:   Wed Feb 14 19:09:51 2024 +0000

    PR other/113336: Fix libatomic testsuite regressions on ARM.
    
    This patch is a revised version of the fix for PR other/113336.
    Bootstrapping GCC on arm-linux-gnueabihf with --with-arch=armv6 currently
    has a large number of FAILs in libatomic (regressions since last time I
    attempted this).  The failure mode is related to IFUNC handling with the
    file tas_8_2_.o containing an unresolved reference to the function
    libat_test_and_set_1_i2.
    
    The following one line change, to build tas_1_2_.o when building tas_8_2_.o,
    resolves the problem for me and restores the libatomic testsuite to 44
    expected passes and 5 unsupported tests [from 22 unexpected failures
    and 22 unresolved testcases].
    `
    
    2024-02-14  Roger Sayle  <roger@nextmovesoftware.com>
                Victor Do Nascimento  <victor.donascimento@arm.com>
    
    libatomic/ChangeLog
            PR other/113336
            * Makefile.am: Build tas_1_2_.o on ARCH_ARM_LINUX
            * Makefile.in: Regenerate.

Diff:
---
 libatomic/Makefile.am | 1 +
 libatomic/Makefile.in | 3 ++-
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/libatomic/Makefile.am b/libatomic/Makefile.am
index 0623a0bf2d1c..d49c44c7d5fb 100644
--- a/libatomic/Makefile.am
+++ b/libatomic/Makefile.am
@@ -142,6 +142,7 @@ if ARCH_ARM_LINUX
 IFUNC_OPTIONS	     = -march=armv7-a+fp -DHAVE_KERNEL64
 libatomic_la_LIBADD += $(foreach s,$(SIZES),$(addsuffix _$(s)_1_.lo,$(SIZEOBJS)))
 libatomic_la_LIBADD += $(addsuffix _8_2_.lo,$(SIZEOBJS))
+libatomic_la_LIBADD += tas_1_2_.lo
 endif
 if ARCH_I386
 IFUNC_OPTIONS	     = -march=i586
diff --git a/libatomic/Makefile.in b/libatomic/Makefile.in
index cd48fa213342..11c8ec7ba15b 100644
--- a/libatomic/Makefile.in
+++ b/libatomic/Makefile.in
@@ -95,7 +95,8 @@ target_triplet = @target@
 @ARCH_ARM_LINUX_TRUE@@HAVE_IFUNC_TRUE@	s,$(SIZES),$(addsuffix \
 @ARCH_ARM_LINUX_TRUE@@HAVE_IFUNC_TRUE@	_$(s)_1_.lo,$(SIZEOBJS))) \
 @ARCH_ARM_LINUX_TRUE@@HAVE_IFUNC_TRUE@	$(addsuffix \
-@ARCH_ARM_LINUX_TRUE@@HAVE_IFUNC_TRUE@	_8_2_.lo,$(SIZEOBJS))
+@ARCH_ARM_LINUX_TRUE@@HAVE_IFUNC_TRUE@	_8_2_.lo,$(SIZEOBJS)) \
+@ARCH_ARM_LINUX_TRUE@@HAVE_IFUNC_TRUE@	tas_1_2_.lo
 @ARCH_I386_TRUE@@HAVE_IFUNC_TRUE@am__append_4 = $(addsuffix _8_1_.lo,$(SIZEOBJS))
 @ARCH_X86_64_TRUE@@HAVE_IFUNC_TRUE@am__append_5 = $(addsuffix _16_1_.lo,$(SIZEOBJS)) \
 @ARCH_X86_64_TRUE@@HAVE_IFUNC_TRUE@		       $(addsuffix _16_2_.lo,$(SIZEOBJS))