melunko@917: dnl as-compiler-flag.m4 0.1.0
melunko@917: 
melunko@917: dnl autostars m4 macro for detection of compiler flags
melunko@917: 
melunko@917: dnl David Schleef <ds@schleef.org>
melunko@917: 
melunko@917: dnl $Id: as-compiler-flag.m4,v 1.1 2005/06/18 18:02:46 burgerman Exp $
melunko@917: 
melunko@917: dnl AS_COMPILER_FLAG(CFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
melunko@917: dnl Tries to compile with the given CFLAGS.
melunko@917: dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags,
melunko@917: dnl and ACTION-IF-NOT-ACCEPTED otherwise.
melunko@917: 
melunko@917: AC_DEFUN([AS_COMPILER_FLAG],
melunko@917: [
melunko@917:   AC_MSG_CHECKING([to see if compiler understands $1])
melunko@917: 
melunko@917:   save_CFLAGS="$CFLAGS"
melunko@917:   CFLAGS="$CFLAGS $1"
melunko@917: 
melunko@917:   AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
melunko@917:   CFLAGS="$save_CFLAGS"
melunko@917: 
melunko@917:   if test "X$flag_ok" = Xyes ; then
melunko@917:     $2
melunko@917:     true
melunko@917:   else
melunko@917:     $3
melunko@917:     true
melunko@917:   fi
melunko@917:   AC_MSG_RESULT([$flag_ok])
melunko@917: ])