sysdeps/i386/configure.in

   1 GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
   2 # Local configure fragment for sysdeps/i386.
   3
   4 AC_HEADER_CHECK([cpuid.h], ,
   5   [AC_MSG_ERROR([gcc must provide the <cpuid.h> header])])
   6
   7 AC_CACHE_CHECK(if -g produces usable source locations for assembler-with-cpp,
   8                libc_cv_cpp_asm_debuginfo, [dnl
   9 cat > conftest.S <<EOF
  10 #include "confdefs.h"
  11
  12 /* comment on
  13    two lines */
  14         ${libc_cv_dot_text}
  15         ${libc_cv_asm_global_directive} foo
  16 foo:
  17         /* Unfortunately this test only works for a real instruction,
  18            not for any of the machine-independent pseudo-ops.
  19            So we just have to assume everybody has a "nop".  */
  20         nop
  21         /* comment */
  22         nop
  23         /* comment */
  24         nop
  25 EOF
  26 if AC_TRY_COMMAND([${CC-cc} $CPPFLAGS $ASFLAGS -g -c conftest.S 1>&AS_MESSAGE_LOG_FD]) && {
  27    ac_pattern='conftest\.S'
  28    AC_TRY_COMMAND([readelf --debug-dump=line conftest.o |
  29                    grep $ac_pattern 1>&AS_MESSAGE_LOG_FD])
  30   }; then
  31   libc_cv_cpp_asm_debuginfo=yes
  32 else
  33   libc_cv_cpp_asm_debuginfo=no
  34 fi
  35 rm -f conftest*])AC_SUBST(libc_cv_cpp_asm_debuginfo)
  36 if test $libc_cv_cpp_asm_debuginfo = yes; then
  37   AC_DEFINE(HAVE_CPP_ASM_DEBUGINFO)
  38 fi
  39
  40 dnl Check if -msse4 works.
  41 AC_CACHE_CHECK(for SSE4 support, libc_cv_cc_sse4, [dnl
  42 if AC_TRY_COMMAND([${CC-cc} -msse4 -xc /dev/null -S -o /dev/null]); then
  43   libc_cv_cc_sse4=yes
  44 else
  45   libc_cv_cc_sse4=no
  46 fi])
  47 if test $libc_cv_cc_sse4 = yes; then
  48   AC_DEFINE(HAVE_SSE4_SUPPORT)
  49 fi
  50
  51 dnl Check if -Wa,-mtune=i686 works.
  52 AC_CACHE_CHECK(for assembler -mtune=i686 support, libc_cv_as_i686, [dnl
  53 if AC_TRY_COMMAND([${CC-cc} -Wa,-mtune=i686 -xc /dev/null -S -o /dev/null]); then
  54   libc_cv_as_i686=yes
  55 else
  56   libc_cv_as_i686=no
  57 fi])
  58
  59 dnl Check if -mavx works.
  60 AC_CACHE_CHECK(for AVX support, libc_cv_cc_avx, [dnl
  61 if AC_TRY_COMMAND([${CC-cc} -mavx -xc /dev/null -S -o /dev/null]); then
  62   libc_cv_cc_avx=yes
  63 else
  64   libc_cv_cc_avx=no
  65 fi])
  66 if test $libc_cv_cc_avx = yes; then
  67   AC_DEFINE(HAVE_AVX_SUPPORT)
  68 fi
  69
  70 dnl Check if -msse2avx works.
  71 AC_CACHE_CHECK(for AVX encoding of SSE instructions, libc_cv_cc_sse2avx, [dnl
  72 if AC_TRY_COMMAND([${CC-cc} -msse2avx -xc /dev/null -S -o /dev/null]); then
  73   libc_cv_cc_sse2avx=yes
  74 else
  75   libc_cv_cc_sse2avx=no
  76 fi])
  77 if test $libc_cv_cc_sse2avx = yes; then
  78   AC_DEFINE(HAVE_SSE2AVX_SUPPORT)
  79 fi
  80
  81 dnl Check if -mfma4 works.
  82 AC_CACHE_CHECK(for FMA4 support, libc_cv_cc_fma4, [dnl
  83 if AC_TRY_COMMAND([${CC-cc} -mfma4 -xc /dev/null -S -o /dev/null]); then
  84   libc_cv_cc_fma4=yes
  85 else
  86   libc_cv_cc_fma4=no
  87 fi])
  88 if test $libc_cv_cc_fma4 = yes; then
  89   AC_DEFINE(HAVE_FMA4_SUPPORT)
  90 fi
  91
  92 dnl Check if -mno-vzeroupper works.
  93 AC_CACHE_CHECK(for -mno-vzeroupper support, libc_cv_cc_novzeroupper, [dnl
  94 if AC_TRY_COMMAND([${CC-cc} -mno-vzeroupper -xc /dev/null -S -o /dev/null]); then
  95   libc_cv_cc_novzeroupper=yes
  96 else
  97   libc_cv_cc_novzeroupper=no
  98 fi])