dnl as-compiler-flag.m4 0.0.1
dnl autostars m4 macro for detection of compiler flags
dnl
dnl ds@schleef.org

AC_DEFUN([AS_COMPILER_FLAG],
[
  AC_MSG_CHECKING([to see if compiler understands $1])

  save_CFLAGS="$CFLAGS"
  CFLAGS="$CFLAGS $1"

  AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
  CFLAGS="$save_CFLAGS"

  if test "X$flag_ok" = Xyes ; then
    $2
    true
  else
    $3
    true
  fi
  AC_MSG_RESULT([$flag_ok])
])