m4/compiler.m4

   1 AC_DEFUN([MOONLIGHT_CHECK_C_COMPILER],
   2 [
   3         dnl add -fstack-protector-all when compiling with gcc
   4         if test "x$GCC" = "xyes" ; then
   5                 CFLAGS="-fstack-protector-all $CFLAGS"
   6                 CXXFLAGS="-fstack-protector-all $CXXFLAGS"
   7         fi
   8
   9         dnl check for MMX support
  10         AC_COMPILE_IFELSE([
  11                 int main () {
  12                         int i = 0;
  13                         int j = -1;
  14                         __asm__ __volatile__ (
  15                                 "movd (%0), %%mm1;"
  16                                 "movd %%mm1, (%1);"
  17                                 : : "r" (&i), "r" (&j)
  18                         );
  19                         return j;
  20                 }
  21         ], AC_DEFINE(HAVE_MMX, [1], [MMX support]))
  22
  23         dnl check for SSE2 support
  24         AC_COMPILE_IFELSE([
  25                 #include <stdio.h>
  26                 #include <string.h>
  27                 int main () {
  28                         char buffer[[128]];
  29                         int j = 1;
  30
  31                         memset(buffer, 0x0, 128);
  32                         __asm__ __volatile__ (
  33                                 "movdqu (%0), %%xmm1;"
  34                                 "movd %%xmm1, (%1);"
  35                                 : : "r" (buffer), "r" (&j)
  36                         );
  37                         return (int)j;
  38                 }
  39         ], AC_DEFINE(HAVE_SSE2, [1], [SSE2 support]))
  40 ])