git.m6w6.name Git - m6w6/libmemcached/blob - config/64bit.m4

   1 dnl ---------------------------------------------------------------------------
   2 dnl Macro: 64BIT
   3 dnl ---------------------------------------------------------------------------
   4 AC_ARG_ENABLE(64bit,
   5     [  --enable-64bit      Build 64bit library.],
   6     [
   7        org_cflags=$CFLAGS
   8        CFLAGS=-m64
   9        AC_LANG(C)
  10        AC_RUN_IFELSE([
  11             AC_LANG_PROGRAM([], [ if (sizeof(void*) != 8) return 1;])
  12           ],[
  13             CFLAGS="$CFLAGS $org_cflags"
  14           ],[
  15             AC_MSG_ERROR([Don't know how to build a 64-bit object.])
  16           ])
  17        org_cxxflags=$CXXFLAGS
  18        CXXFLAGS=-m64
  19        AC_LANG(C++)
  20        AC_RUN_IFELSE([
  21             AC_LANG_PROGRAM([], [ if (sizeof(void*) != 8) return 1;])
  22           ],[
  23             CXXFLAGS="$CXXFLAGS $org_cxxflags"
  24           ],[
  25             AC_MSG_ERROR([Don't know how to build a 64-bit object.])
  26           ])
  27
  28     ])
  29 dnl ---------------------------------------------------------------------------
  30 dnl End Macro: 64BIT
  31 dnl ---------------------------------------------------------------------------