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configure.ac: Do not probe for <avxintrin.h> 

With GCC 12, this header file cannot be included on its own.
Doing so fails with #error, but also produces many warnings
related to implicit ints and implicit function declarations.
This is inconvenient for distributions who are trying to
switch to newer C versions (without implicit ints/function
declarations), and monitor builds for suspicious warnings
related to obsolete C features.
This commit is contained in:
Florian Weimer 2023-01-12 10:04:43 +01:00 committed by Laurence
parent 5f4723db47
commit f5d4e1dd75
1 changed files with 1 additions and 4 deletions
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5
configure.ac
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@ -738,7 +738,7 @@ CXXFLAGS="${save_cxxflags} ${sse3_flags}"
AC_CHECK_HEADERS([intrin.h x86intrin.h pmmintrin.h xmmintrin.h emmintrin.h])
CXXFLAGS="${save_cxxflags} ${avx_flags}"
CPPFLAGS="${save_cppflags} ${avx_flags}"
AC_CHECK_HEADERS([immintrin.h avxintrin.h])
AC_CHECK_HEADERS([immintrin.h])
AC_CHECK_DECLS([_xgetbv, xgetbv, __xgetbv, cpuid, _cpuid, __cpuid],
[],[],[[
@ -748,9 +748,6 @@ AC_CHECK_DECLS([_xgetbv, xgetbv, __xgetbv, cpuid, _cpuid, __cpuid],
#if HAVE_IMMINTRIN_H
# include <immintrin.h>
#endif
#if HAVE_AVXINTRIN_H
# include <avxintrin.h>
#endif
#if HAVE_X86INTRIN_H
# include <x86intrin.h>
#endif