SoftHSMv2/m4/acx_64bit.m4

   1 AC_DEFUN([ACX_64BIT],[
   2         AC_ARG_ENABLE(
   3                 [64bit],
   4                 [AS_HELP_STRING([--enable-64bit],[enable 64-bit compiling @<:@disabled@:>@])],
   5                 [enable_64bit="${enableval}"],
   6                 [enable_64bit="no"])
   7
   8         if test "x$enable_64bit" = "xyes"
   9         then
  10                 AC_MSG_CHECKING(if we can compile in 64-bit mode)
  11                 tmp_CFLAGS=$CFLAGS
  12                 CFLAGS="-m64"
  13                 AC_RUN_IFELSE(
  14                         [
  15                                 AC_LANG_PROGRAM([],[return sizeof(void*) == 8 ? 0 : 1;])
  16                         ], [
  17                                 AC_MSG_RESULT(yes)
  18                                 CXXFLAGS="-m64 $CXXFLAGS"
  19                                 LDFLAGS="-m64 $LDFLAGS"
  20                                 CFLAGS="-m64 $tmp_CFLAGS"
  21                         ],[
  22                                 AC_MSG_RESULT(no)
  23                                 AC_MSG_ERROR([Don't know how to compile in 64-bit mode.])
  24                                 CFLAGS=$tmp_CFLAGS
  25                         ]
  26                 )
  27         fi
  28
  29 ])