sysdeps/x86_64/configure.ac

   1 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
   2 # Local configure fragment for sysdeps/x86_64.
   3
   4 AC_CHECK_HEADER([cpuid.h], ,
   5   [AC_MSG_ERROR([gcc must provide the <cpuid.h> header])],
   6   [/* No default includes.  */])
   7
   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])
  11 ])
  12 if test $libc_cv_cc_sse4 = yes; then
  13   AC_DEFINE(HAVE_SSE4_SUPPORT)
  14 fi
  15 LIBC_CONFIG_VAR([config-cflags-sse4], [$libc_cv_cc_sse4])
  16
  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])
  20 ])
  21 if test $libc_cv_cc_avx = yes; then
  22   AC_DEFINE(HAVE_AVX_SUPPORT)
  23 fi
  24 LIBC_CONFIG_VAR([config-cflags-avx], [$libc_cv_cc_avx])
  25
  26 dnl Check if -mavx512f works.
  27 AC_CACHE_CHECK(for AVX512 support, libc_cv_cc_avx512, [dnl
  28 LIBC_TRY_CC_OPTION([-mavx512f], [libc_cv_cc_avx512=yes], [libc_cv_cc_avx512=no])
  29 ])
  30 if test $libc_cv_cc_avx512 = yes; then
  31   AC_DEFINE(HAVE_AVX512_SUPPORT)
  32 fi
  33 LIBC_CONFIG_VAR([config-cflags-avx512], [$libc_cv_cc_avx512])
  34
  35 dnl Check if asm supports AVX512.
  36 AC_CACHE_CHECK(for AVX512 support in assembler, libc_cv_asm_avx512, [dnl
  37 cat > conftest.s <<\EOF
  38         vmovdqu64 %zmm0, (%rsp)
  39 EOF
  40 if AC_TRY_COMMAND(${CC-cc} -c $ASFLAGS conftest.s 1>&AS_MESSAGE_LOG_FD); then
  41   libc_cv_asm_avx512=yes
  42 else
  43   libc_cv_asm_avx512=no
  44 fi
  45 rm -f conftest*])
  46 if test $libc_cv_asm_avx512 == yes; then
  47   AC_DEFINE(HAVE_AVX512_ASM_SUPPORT)
  48 fi
  49
  50 dnl Check if -msse2avx works.
  51 AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl
  52 LIBC_TRY_CC_OPTION([-msse2avx],
  53                    [libc_cv_cc_sse2avx=yes],
  54                    [libc_cv_cc_sse2avx=no])
  55 ])
  56 if test $libc_cv_cc_sse2avx = yes; then
  57   AC_DEFINE(HAVE_SSE2AVX_SUPPORT)
  58 fi
  59 LIBC_CONFIG_VAR([config-cflags-sse2avx], [$libc_cv_cc_sse2avx])
  60
  61 dnl Check if -mfma4 works.
  62 AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl
  63 LIBC_TRY_CC_OPTION([-mfma4], [libc_cv_cc_fma4=yes], [libc_cv_cc_fma4=no])
  64 ])
  65 if test $libc_cv_cc_fma4 = yes; then
  66   AC_DEFINE(HAVE_FMA4_SUPPORT)
  67 fi
  68 LIBC_CONFIG_VAR([have-mfma4], [$libc_cv_cc_fma4])
  69
  70 dnl Check if -mno-vzeroupper works.
  71 AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl
  72 LIBC_TRY_CC_OPTION([-mno-vzeroupper],
  73                    [libc_cv_cc_novzeroupper=yes],
  74                    [libc_cv_cc_novzeroupper=no])
  75 ])
  76 LIBC_CONFIG_VAR([config-cflags-novzeroupper], [$libc_cv_cc_novzeroupper])
  77
  78 dnl It is always possible to access static and hidden symbols in an
  79 dnl position independent way.
  80 AC_DEFINE(PI_STATIC_AND_HIDDEN)
  81 # work around problem with autoconf and empty lines at the end of files