| 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 |
