diff options
author | Jakub Jelinek <jakub@redhat.com> | 2023-12-05 23:32:19 +0100 |
---|---|---|
committer | Jakub Jelinek <jakub@redhat.com> | 2023-12-05 23:32:19 +0100 |
commit | c73cc6fe6207b2863afa31a3be8ad87b70d3df0a (patch) | |
tree | 32e9654533c34c8a1743a79be914db927320f168 /libiberty/configure.ac | |
parent | b8cf266f4ca4ff89704b190c827abf9ea7e7b5bf (diff) | |
download | gcc-c73cc6fe6207b2863afa31a3be8ad87b70d3df0a.zip gcc-c73cc6fe6207b2863afa31a3be8ad87b70d3df0a.tar.gz gcc-c73cc6fe6207b2863afa31a3be8ad87b70d3df0a.tar.bz2 |
libiberty: Fix build with GCC < 7
Tobias reported on IRC that the linker fails to build with GCC 4.8.5.
In configure I've tried to use everything actually used in the sha1.c
x86 hw implementation, but unfortunately I forgot about implicit function
declarations. GCC before 7 did have <cpuid.h> header and bit_SHA define
and __get_cpuid function defined inline, but it didn't define
__get_cpuid_count, which compiled fine (and the configure test is
intentionally compile time only) due to implicit function declaration,
but then failed to link when linking the linker, because
__get_cpuid_count wasn't defined anywhere.
The following patch fixes that by using what autoconf uses in AC_CHECK_DECL
to make sure the functions are declared.
2023-12-05 Jakub Jelinek <jakub@redhat.com>
* configure.ac (HAVE_X86_SHA1_HW_SUPPORT): Verify __get_cpuid and
__get_cpuid_count are not implicitly declared.
* configure: Regenerated.
Diffstat (limited to 'libiberty/configure.ac')
-rw-r--r-- | libiberty/configure.ac | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libiberty/configure.ac b/libiberty/configure.ac index 96a6193..0888e63 100644 --- a/libiberty/configure.ac +++ b/libiberty/configure.ac @@ -771,6 +771,8 @@ void foo (__m128i *buf, unsigned int e, __m128i msg0, __m128i msg1) int bar (void) { unsigned int eax, ebx, ecx, edx; + (void) __get_cpuid; + (void) __get_cpuid_count; if (__get_cpuid_count (7, 0, &eax, &ebx, &ecx, &edx) && (ebx & bit_SHA) != 0 && __get_cpuid (1, &eax, &ebx, &ecx, &edx) |