1dnl A version of AS_COMPILER_FLAG that supports both C and C++.
2dnl Based on:
3
4dnl as-compiler-flag.m4 0.1.0
5dnl autostars m4 macro for detection of compiler flags
6dnl David Schleef <ds@schleef.org>
7dnl $Id: as-compiler-flag.m4,v 1.1 2005/06/18 18:02:46 burgerman Exp $
8
9dnl TP_COMPILER_FLAG(CFLAGS, ACTION-IF-ACCEPTED, [ACTION-IF-NOT-ACCEPTED])
10dnl Tries to compile with the given CFLAGS and CXXFLAGS.
11dnl
12dnl Runs ACTION-IF-ACCEPTED if the compiler for the currently selected
13dnl AC_LANG can compile with the flags, and ACTION-IF-NOT-ACCEPTED otherwise.
14
15AC_DEFUN([TP_COMPILER_FLAG],
16[
17  AC_MSG_CHECKING([to see if compiler understands $1])
18
19  save_CFLAGS="$CFLAGS"
20  save_CXXFLAGS="$CXXFLAGS"
21  CFLAGS="$CFLAGS $1"
22  CXXFLAGS="$CXXFLAGS $1"
23
24  AC_TRY_COMPILE([ ], [], [flag_ok=yes], [flag_ok=no])
25  CFLAGS="$save_CFLAGS"
26  CXXFLAGS="$save_CXXFLAGS"
27
28  if test "X$flag_ok" = Xyes ; then
29    $2
30    true
31  else
32    $3
33    true
34  fi
35  AC_MSG_RESULT([$flag_ok])
36])
37
38dnl TP_ADD_COMPILER_FLAG(VARIABLE, CFLAGS)
39dnl Append CFLAGS to VARIABLE if the compiler supports them.
40AC_DEFUN([TP_ADD_COMPILER_FLAG],
41[
42  TP_COMPILER_FLAG([$2], [$1="[$]$1 $2"])
43])
44