sysdeps/i386/configure

   1
   2 # ac_fn_c_check_header_compile LINENO HEADER VAR INCLUDES
   3 # -------------------------------------------------------
   4 # Tests whether HEADER exists and can be compiled using the include files in
   5 # INCLUDES, setting the cache variable VAR accordingly.
   6 ac_fn_c_check_header_compile ()
   7 {
   8   as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
   9   { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $2" >&5
  10 $as_echo_n "checking for $2... " >&6; }
  11 if eval \${$3+:} false; then :
  12   $as_echo_n "(cached) " >&6
  13 else
  14   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
  15 /* end confdefs.h.  */
  16 $4
  17 #include <$2>
  18 _ACEOF
  19 if ac_fn_c_try_compile "$LINENO"; then :
  20   eval "$3=yes"
  21 else
  22   eval "$3=no"
  23 fi
  24 rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
  25 fi
  26 eval ac_res=\$$3
  27                { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
  28 $as_echo "$ac_res" >&6; }
  29   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
  30
  31 } # ac_fn_c_check_header_compile
  32 # This file is generated from configure.ac by Autoconf.  DO NOT EDIT!
  33  # Local configure fragment for sysdeps/i386.
  34
  35 # We no longer support i386 since it lacks the atomic instructions
  36 # required to implement NPTL threading.
  37 if test "$config_machine" = i386; then
  38   as_fn_error $? "
  39 *** ERROR: Support for i386 is deprecated.
  40 *** Please use host i786, i686, i585 or i486.
  41 *** For example: /src/glibc/configure --host=i686-pc-linux-gnu ...\"" "$LINENO" 5
  42 fi
  43
  44 # The GNU C Library can't be built for i386.  There are several reasons for
  45 # this restriction.  The primary reason is that i386 lacks the atomic
  46 # operations required to support the current NPTL implementation.  While it is
  47 # possible that such atomic operations could be emulated in the kernel to date
  48 # no such work has been done to enable this.  Even with NPTL disabled you still
  49 # have no atomic.h implementation.  Given the declining use of i386 we disable
  50 # support for building with `-march=i386' or `-mcpu=i386.' We don't explicitly
  51 # check for i386, instead we make sure the compiler has support for inlining
  52 # the builtin __sync_val_compare_and_swap. If it does then we should have no
  53 # problem building for i386.
  54 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for compiler support of inlined builtin function __sync_val_compare_and_swap" >&5
  55 $as_echo_n "checking for compiler support of inlined builtin function __sync_val_compare_and_swap... " >&6; }
  56 libc_compiler_builtin_inlined=no
  57 cat > conftest.c <<EOF
  58 int _start (void) { int a, b, c; __sync_val_compare_and_swap (&a, b, c); return 0; }
  59 EOF
  60 if ! { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS
  61                      -O0 -nostdlib -nostartfiles
  62                      -S conftest.c -o - | fgrep "__sync_val_compare_and_swap"
  63                      1>&5'
  64   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
  65   (eval $ac_try) 2>&5
  66   ac_status=$?
  67   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
  68   test $ac_status = 0; }; }
  69 then
  70   libc_compiler_builtin_inlined=yes
  71 fi
  72 rm -f conftest*
  73 if test $libc_compiler_builtin_inlined = yes; then
  74   libc_cv_unsupported_i386=no
  75 else
  76   as_fn_error $? "
  77 *** Building with -march=i386/-mcpu=i386 is not supported.
  78 *** Please use host i786, i686, i586, or i486.
  79 *** For example: /source/glibc/configure CFLAGS='-O2 -march=i686' ..." "$LINENO" 5
  80 fi
  81 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_compiler_builtin_inlined" >&5
  82 $as_echo "$libc_compiler_builtin_inlined" >&6; }
  83
  84
  85 ac_fn_c_check_header_compile "$LINENO" "cpuid.h" "ac_cv_header_cpuid_h" "/* No default includes.  */
  86 "
  87 if test "x$ac_cv_header_cpuid_h" = xyes; then :
  88
  89 else
  90   as_fn_error $? "gcc must provide the <cpuid.h> header" "$LINENO" 5
  91 fi
  92
  93
  94
  95 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for SSE4 support" >&5
  96 $as_echo_n "checking for SSE4 support... " >&6; }
  97 if ${libc_cv_cc_sse4+:} false; then :
  98   $as_echo_n "(cached) " >&6
  99 else
 100   if { ac_try='${CC-cc} -msse4 -xc /dev/null -S -o /dev/null'
 101   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
 102   (eval $ac_try) 2>&5
 103   ac_status=$?
 104   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
 105   test $ac_status = 0; }; }; then :
 106   libc_cv_cc_sse4=yes
 107 else
 108   libc_cv_cc_sse4=no
 109 fi
 110
 111 fi
 112 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse4" >&5
 113 $as_echo "$libc_cv_cc_sse4" >&6; }
 114 if test $libc_cv_cc_sse4 = yes; then
 115   $as_echo "#define HAVE_SSE4_SUPPORT 1" >>confdefs.h
 116
 117 fi
 118 config_vars="$config_vars
 119 config-cflags-sse4 = $libc_cv_cc_sse4"
 120
 121 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for assembler -mtune=i686 support" >&5
 122 $as_echo_n "checking for assembler -mtune=i686 support... " >&6; }
 123 if ${libc_cv_as_i686+:} false; then :
 124   $as_echo_n "(cached) " >&6
 125 else
 126   if { ac_try='${CC-cc} -Wa,-mtune=i686 -xc /dev/null -S -o /dev/null'
 127   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
 128   (eval $ac_try) 2>&5
 129   ac_status=$?
 130   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
 131   test $ac_status = 0; }; }; then :
 132   libc_cv_as_i686=yes
 133 else
 134   libc_cv_as_i686=no
 135 fi
 136
 137 fi
 138 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_as_i686" >&5
 139 $as_echo "$libc_cv_as_i686" >&6; }
 140 config_vars="$config_vars
 141 config-asflags-i686 = $libc_cv_as_i686"
 142
 143 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX support" >&5
 144 $as_echo_n "checking for AVX support... " >&6; }
 145 if ${libc_cv_cc_avx+:} false; then :
 146   $as_echo_n "(cached) " >&6
 147 else
 148   if { ac_try='${CC-cc} -mavx -xc /dev/null -S -o /dev/null'
 149   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
 150   (eval $ac_try) 2>&5
 151   ac_status=$?
 152   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
 153   test $ac_status = 0; }; }; then :
 154   libc_cv_cc_avx=yes
 155 else
 156   libc_cv_cc_avx=no
 157 fi
 158
 159 fi
 160 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_avx" >&5
 161 $as_echo "$libc_cv_cc_avx" >&6; }
 162 if test $libc_cv_cc_avx = yes; then
 163   $as_echo "#define HAVE_AVX_SUPPORT 1" >>confdefs.h
 164
 165 fi
 166 config_vars="$config_vars
 167 config-cflags-avx = $libc_cv_cc_avx"
 168
 169 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for AVX encoding of SSE instructions" >&5
 170 $as_echo_n "checking for AVX encoding of SSE instructions... " >&6; }
 171 if ${libc_cv_cc_sse2avx+:} false; then :
 172   $as_echo_n "(cached) " >&6
 173 else
 174   if { ac_try='${CC-cc} -msse2avx -xc /dev/null -S -o /dev/null'
 175   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
 176   (eval $ac_try) 2>&5
 177   ac_status=$?
 178   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
 179   test $ac_status = 0; }; }; then :
 180   libc_cv_cc_sse2avx=yes
 181 else
 182   libc_cv_cc_sse2avx=no
 183 fi
 184
 185 fi
 186 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_sse2avx" >&5
 187 $as_echo "$libc_cv_cc_sse2avx" >&6; }
 188 if test $libc_cv_cc_sse2avx = yes; then
 189   $as_echo "#define HAVE_SSE2AVX_SUPPORT 1" >>confdefs.h
 190
 191 fi
 192 config_vars="$config_vars
 193 config-cflags-sse2avx = $libc_cv_cc_sse2avx"
 194
 195 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for FMA4 support" >&5
 196 $as_echo_n "checking for FMA4 support... " >&6; }
 197 if ${libc_cv_cc_fma4+:} false; then :
 198   $as_echo_n "(cached) " >&6
 199 else
 200   if { ac_try='${CC-cc} -mfma4 -xc /dev/null -S -o /dev/null'
 201   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
 202   (eval $ac_try) 2>&5
 203   ac_status=$?
 204   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
 205   test $ac_status = 0; }; }; then :
 206   libc_cv_cc_fma4=yes
 207 else
 208   libc_cv_cc_fma4=no
 209 fi
 210
 211 fi
 212 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_fma4" >&5
 213 $as_echo "$libc_cv_cc_fma4" >&6; }
 214 if test $libc_cv_cc_fma4 = yes; then
 215   $as_echo "#define HAVE_FMA4_SUPPORT 1" >>confdefs.h
 216
 217 fi
 218 config_vars="$config_vars
 219 have-mfma4 = $libc_cv_cc_fma4"
 220
 221 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -mno-vzeroupper support" >&5
 222 $as_echo_n "checking for -mno-vzeroupper support... " >&6; }
 223 if ${libc_cv_cc_novzeroupper+:} false; then :
 224   $as_echo_n "(cached) " >&6
 225 else
 226   if { ac_try='${CC-cc} -mno-vzeroupper -xc /dev/null -S -o /dev/null'
 227   { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
 228   (eval $ac_try) 2>&5
 229   ac_status=$?
 230   $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
 231   test $ac_status = 0; }; }; then :
 232   libc_cv_cc_novzeroupper=yes
 233 else
 234   libc_cv_cc_novzeroupper=no
 235 fi
 236
 237 fi
 238 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_cc_novzeroupper" >&5
 239 $as_echo "$libc_cv_cc_novzeroupper" >&6; }
 240 config_vars="$config_vars
 241 config-cflags-novzeroupper = $libc_cv_cc_novzeroupper"
 242
 243 $as_echo "#define USE_REGPARMS 1" >>confdefs.h
 244
 245
 246 $as_echo "#define PI_STATIC_AND_HIDDEN 1" >>confdefs.h
 247