m4/efl_compiler_flag.m4

   1 dnl Checks if a given compiler switch is supported.
   2 dnl If so, this macro adds the flag to the CFLAGS
   3
   4 AC_DEFUN([EFL_COMPILER_FLAG],
   5 [
   6
   7 CFLAGS_save="${CFLAGS}"
   8 CFLAGS="${CFLAGS} $1"
   9
  10 AC_LANG_PUSH([C])
  11 AC_MSG_CHECKING([whether the compiler supports $1])
  12
  13 AC_COMPILE_IFELSE(
  14    [AC_LANG_PROGRAM([[]])],
  15    [have_flag="yes"],
  16    [have_flag="no"])
  17 AC_MSG_RESULT([${have_flag}])
  18
  19 if test "x${have_flag}" = "xno" ; then
  20    CFLAGS="${CFLAGS_save}"
  21 fi
  22 AC_LANG_POP([C])
  23
  24 ])