3 # AX_CHECK_COMPILE_AND_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
7 # Check whether the given FLAG works with the current language's compiler
8 # or gives an error. (Warnings, however, are ignored)
10 # ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on
13 # If EXTRA-FLAGS is defined, it is added to the current language's default
14 # flags (e.g. CFLAGS) when the check is done. The check is thus made with
15 # the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
16 # force the compiler to issue an error when a bad flag is given.
18 # INPUT gives an alternative input source to AC_COMPILE_IFELSE.
20 # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
21 # macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
25 # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
26 # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
27 # Copyright (c) 2017 Lev Walkin <vlm@lionet.info>
29 # This program is free software: you can redistribute it and/or modify it
30 # under the terms of the GNU General Public License as published by the
31 # Free Software Foundation, either version 3 of the License, or (at your
32 # option) any later version.
34 # This program is distributed in the hope that it will be useful, but
35 # WITHOUT ANY WARRANTY; without even the implied warranty of
36 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
37 # Public License for more details.
39 # You should have received a copy of the GNU General Public License along
40 # with this program. If not, see <http://www.gnu.org/licenses/>.
42 # As a special exception, the respective Autoconf Macro's copyright owner
43 # gives unlimited permission to copy, distribute and modify the configure
44 # scripts that are the output of Autoconf when processing the Macro. You
45 # need not follow the terms of the GNU General Public License when using
46 # or distributing such scripts, even though portions of the text of the
47 # Macro appear in them. The GNU General Public License (GPL) does govern
48 # all other use of the material that constitutes the Autoconf Macro.
50 # This special exception to the GPL applies to versions of the Autoconf
51 # Macro released by the Autoconf Archive. When you make and distribute a
52 # modified version of the Autoconf Macro, you may extend this special
53 # exception to the GPL to apply to your modified version as well.
57 AC_DEFUN([AX_CHECK_COMPILE_AND_LINK_FLAG],
59 AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]clflags_$4_$1])dnl
60 AC_CACHE_CHECK([whether _AC_LANG compiler and linker accept $1], CACHEVAR, [
61 ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS
62 _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1"
63 AC_LINK_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])],
64 [AS_VAR_SET(CACHEVAR,[yes])],
65 [AS_VAR_SET(CACHEVAR,[no])])
66 _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags])
67 AS_IF([test x"AS_VAR_GET(CACHEVAR)" = xyes],
68 [m4_default([$2], :)],
69 [m4_default([$3], :)])
70 AS_VAR_POPDEF([CACHEVAR])dnl
71 ])dnl AX_CHECK_COMPILE_AND_LINK_FLAG