diff options
Diffstat (limited to 'sysdeps/x86_64/configure.ac')
| -rw-r--r-- | sysdeps/x86_64/configure.ac | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/sysdeps/x86_64/configure.ac b/sysdeps/x86_64/configure.ac new file mode 100644 index 0000000000..c682f93c3e --- /dev/null +++ b/sysdeps/x86_64/configure.ac @@ -0,0 +1,57 @@ +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory. +# Local configure fragment for sysdeps/x86_64. + +AC_CHECK_HEADER([cpuid.h], , + [AC_MSG_ERROR([gcc must provide the <cpuid.h> header])], + [/* No default includes. */]) + +dnl Check if -msse4 works. +AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl +LIBC_TRY_CC_OPTION([-msse4], [libc_cv_cc_sse4=yes], [libc_cv_cc_sse4=no]) +]) +if test $libc_cv_cc_sse4 = yes; then + AC_DEFINE(HAVE_SSE4_SUPPORT) +fi +LIBC_CONFIG_VAR([config-cflags-sse4], [$libc_cv_cc_sse4]) + +dnl Check if -mavx works. +AC_CACHE_CHECK(for AVX support, libc_cv_cc_avx, [dnl +LIBC_TRY_CC_OPTION([-mavx], [libc_cv_cc_avx=yes], [libc_cv_cc_avx=no]) +]) +if test $libc_cv_cc_avx = yes; then + AC_DEFINE(HAVE_AVX_SUPPORT) +fi +LIBC_CONFIG_VAR([config-cflags-avx], [$libc_cv_cc_avx]) + +dnl Check if -msse2avx works. +AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl +LIBC_TRY_CC_OPTION([-msse2avx], + [libc_cv_cc_sse2avx=yes], + [libc_cv_cc_sse2avx=no]) +]) +if test $libc_cv_cc_sse2avx = yes; then + AC_DEFINE(HAVE_SSE2AVX_SUPPORT) +fi +LIBC_CONFIG_VAR([config-cflags-sse2avx], [$libc_cv_cc_sse2avx]) + +dnl Check if -mfma4 works. +AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl +LIBC_TRY_CC_OPTION([-mfma4], [libc_cv_cc_fma4=yes], [libc_cv_cc_fma4=no]) +]) +if test $libc_cv_cc_fma4 = yes; then + AC_DEFINE(HAVE_FMA4_SUPPORT) +fi +LIBC_CONFIG_VAR([have-mfma4], [$libc_cv_cc_fma4]) + +dnl Check if -mno-vzeroupper works. +AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl +LIBC_TRY_CC_OPTION([-mno-vzeroupper], + [libc_cv_cc_novzeroupper=yes], + [libc_cv_cc_novzeroupper=no]) +]) +LIBC_CONFIG_VAR([config-cflags-novzeroupper], [$libc_cv_cc_novzeroupper]) + +dnl It is always possible to access static and hidden symbols in an +dnl position independent way. +AC_DEFINE(PI_STATIC_AND_HIDDEN) +# work around problem with autoconf and empty lines at the end of files |