1 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
2 # Local configure fragment for sysdeps/x86_64.
4 AC_CHECK_HEADER([cpuid.h], ,
5 [AC_MSG_ERROR([gcc must provide the <cpuid.h> header])],
6 [/* No default includes. */])
8 dnl Check if -msse4 works.
9 AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl
10 LIBC_TRY_CC_OPTION([-msse4], [libc_cv_cc_sse4=yes], [libc_cv_cc_sse4=no])
12 if test $libc_cv_cc_sse4 = yes; then
13 AC_DEFINE(HAVE_SSE4_SUPPORT)
15 LIBC_CONFIG_VAR([config-cflags-sse4], [$libc_cv_cc_sse4])
17 dnl Check if -mavx works.
18 AC_CACHE_CHECK(for AVX support, libc_cv_cc_avx, [dnl
19 LIBC_TRY_CC_OPTION([-mavx], [libc_cv_cc_avx=yes], [libc_cv_cc_avx=no])
21 if test $libc_cv_cc_avx = yes; then
22 AC_DEFINE(HAVE_AVX_SUPPORT)
24 LIBC_CONFIG_VAR([config-cflags-avx], [$libc_cv_cc_avx])
26 dnl Check if asm supports AVX512.
27 AC_CACHE_CHECK(for AVX512 support in assembler, libc_cv_asm_avx512, [dnl
28 cat > conftest.s <<\EOF
29 vmovdqu64 %zmm0, (%rsp)
30 vandpd (%rax), %zmm6, %zmm1
32 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
33 libc_cv_asm_avx512=yes
38 if test $libc_cv_asm_avx512 == yes; then
39 AC_DEFINE(HAVE_AVX512_ASM_SUPPORT)
42 dnl Check if -mavx512f works.
43 AC_CACHE_CHECK(for AVX512 support, libc_cv_cc_avx512, [dnl
44 LIBC_TRY_CC_OPTION([-mavx512f], [libc_cv_cc_avx512=$libc_cv_asm_avx512], [libc_cv_cc_avx512=no])
46 if test $libc_cv_cc_avx512 = yes; then
47 AC_DEFINE(HAVE_AVX512_SUPPORT)
49 LIBC_CONFIG_VAR([config-cflags-avx512], [$libc_cv_cc_avx512])
51 dnl Check if -msse2avx works.
52 AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl
53 LIBC_TRY_CC_OPTION([-msse2avx],
54 [libc_cv_cc_sse2avx=yes],
55 [libc_cv_cc_sse2avx=no])
57 if test $libc_cv_cc_sse2avx = yes; then
58 AC_DEFINE(HAVE_SSE2AVX_SUPPORT)
60 LIBC_CONFIG_VAR([config-cflags-sse2avx], [$libc_cv_cc_sse2avx])
62 dnl Check if -mfma4 works.
63 AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl
64 LIBC_TRY_CC_OPTION([-mfma4], [libc_cv_cc_fma4=yes], [libc_cv_cc_fma4=no])
66 if test $libc_cv_cc_fma4 = yes; then
67 AC_DEFINE(HAVE_FMA4_SUPPORT)
69 LIBC_CONFIG_VAR([have-mfma4], [$libc_cv_cc_fma4])
71 dnl Check if -mno-vzeroupper works.
72 AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl
73 LIBC_TRY_CC_OPTION([-mno-vzeroupper],
74 [libc_cv_cc_novzeroupper=yes],
75 [libc_cv_cc_novzeroupper=no])
77 LIBC_CONFIG_VAR([config-cflags-novzeroupper], [$libc_cv_cc_novzeroupper])
79 dnl Check whether asm supports Intel MPX
80 AC_CACHE_CHECK(for Intel MPX support, libc_cv_asm_mpx, [dnl
81 cat > conftest.s <<\EOF
84 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
90 if test $libc_cv_asm_mpx == yes; then
91 AC_DEFINE(HAVE_MPX_SUPPORT)
94 dnl Check if -mavx2 works.
95 AC_CACHE_CHECK(for AVX2 support, libc_cv_cc_avx2, [dnl
96 LIBC_TRY_CC_OPTION([-mavx2], [libc_cv_cc_avx2=yes], [libc_cv_cc_avx2=no])
98 if test $libc_cv_cc_avx2 = yes; then
99 AC_DEFINE(HAVE_AVX2_SUPPORT)
101 LIBC_CONFIG_VAR([config-cflags-avx2], [$libc_cv_cc_avx2])
103 if test x"$build_mathvec" = xnotset; then
107 dnl It is always possible to access static and hidden symbols in an
108 dnl position independent way.
109 AC_DEFINE(PI_STATIC_AND_HIDDEN)
110 # work around problem with autoconf and empty lines at the end of files