melunko@38: dnl as-compiler-flag.m4 0.1.0
melunko@38: 
melunko@38: dnl autostars m4 macro for detection of compiler flags
melunko@38: 
melunko@38: dnl David Schleef <ds@schleef.org>
melunko@38: 
renatofilho@621: dnl $Id: as-compiler-flag.m4,v 1.1 2005/06/18 18:02:46 burgerman Exp $
melunko@38: 
melunko@38: dnl AS_COMPILER_FLAG(CFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
melunko@38: dnl Tries to compile with the given CFLAGS.
melunko@38: dnl Runs ACTION-IF-ACCEPTED if the compiler can compile with the flags,
melunko@38: dnl and ACTION-IF-NOT-ACCEPTED otherwise.
melunko@38: 
melunko@38: AC_DEFUN([AS_COMPILER_FLAG],
melunko@38: [
melunko@38:   AC_MSG_CHECKING([to see if compiler understands $1])
melunko@38: 
melunko@38:   save_CFLAGS="$CFLAGS"
melunko@38:   CFLAGS="$CFLAGS $1"
melunko@38: 
melunko@38:   AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
melunko@38:   CFLAGS="$save_CFLAGS"
melunko@38: 
melunko@38:   if test "X$flag_ok" = Xyes ; then
melunko@38:     $2
melunko@38:     true
melunko@38:   else
melunko@38:     $3
melunko@38:     true
melunko@38:   fi
melunko@38:   AC_MSG_RESULT([$flag_ok])
melunko@38: ])