1 # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
2 # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
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37 AC_DEFUN([AX_CHECK_COMPILE_FLAG],
38 [AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
39 AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl
40 AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [
41 ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
42 _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
43 AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
44 [AS_VAR_SET(CACHEVAR,[yes])],
45 [AS_VAR_SET(CACHEVAR,[no])])
46 _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
47 AS_VAR_IF(CACHEVAR,yes,
48 [m4_default([$2], :)],
49 [m4_default([$3], :)])
50 AS_VAR_POPDEF([CACHEVAR])dnl
51 ])dnl AX_CHECK_COMPILE_FLAGS