| File macros/ax_check_compile_flag.m4 added (mode: 100644) (index 0000000..dcabb92) |
|
1 |
|
# =========================================================================== |
|
2 |
|
# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html |
|
3 |
|
# =========================================================================== |
|
4 |
|
# |
|
5 |
|
# SYNOPSIS |
|
6 |
|
# |
|
7 |
|
# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT]) |
|
8 |
|
# |
|
9 |
|
# DESCRIPTION |
|
10 |
|
# |
|
11 |
|
# Check whether the given FLAG works with the current language's compiler |
|
12 |
|
# or gives an error. (Warnings, however, are ignored) |
|
13 |
|
# |
|
14 |
|
# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on |
|
15 |
|
# success/failure. |
|
16 |
|
# |
|
17 |
|
# If EXTRA-FLAGS is defined, it is added to the current language's default |
|
18 |
|
# flags (e.g. CFLAGS) when the check is done. The check is thus made with |
|
19 |
|
# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to |
|
20 |
|
# force the compiler to issue an error when a bad flag is given. |
|
21 |
|
# |
|
22 |
|
# INPUT gives an alternative input source to AC_COMPILE_IFELSE. |
|
23 |
|
# |
|
24 |
|
# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this |
|
25 |
|
# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG. |
|
26 |
|
# |
|
27 |
|
# LICENSE |
|
28 |
|
# |
|
29 |
|
# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> |
|
30 |
|
# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> |
|
31 |
|
# |
|
32 |
|
# This program is free software: you can redistribute it and/or modify it |
|
33 |
|
# under the terms of the GNU General Public License as published by the |
|
34 |
|
# Free Software Foundation, either version 3 of the License, or (at your |
|
35 |
|
# option) any later version. |
|
36 |
|
# |
|
37 |
|
# This program is distributed in the hope that it will be useful, but |
|
38 |
|
# WITHOUT ANY WARRANTY; without even the implied warranty of |
|
39 |
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
|
40 |
|
# Public License for more details. |
|
41 |
|
# |
|
42 |
|
# You should have received a copy of the GNU General Public License along |
|
43 |
|
# with this program. If not, see <https://www.gnu.org/licenses/>. |
|
44 |
|
# |
|
45 |
|
# As a special exception, the respective Autoconf Macro's copyright owner |
|
46 |
|
# gives unlimited permission to copy, distribute and modify the configure |
|
47 |
|
# scripts that are the output of Autoconf when processing the Macro. You |
|
48 |
|
# need not follow the terms of the GNU General Public License when using |
|
49 |
|
# or distributing such scripts, even though portions of the text of the |
|
50 |
|
# Macro appear in them. The GNU General Public License (GPL) does govern |
|
51 |
|
# all other use of the material that constitutes the Autoconf Macro. |
|
52 |
|
# |
|
53 |
|
# This special exception to the GPL applies to versions of the Autoconf |
|
54 |
|
# Macro released by the Autoconf Archive. When you make and distribute a |
|
55 |
|
# modified version of the Autoconf Macro, you may extend this special |
|
56 |
|
# exception to the GPL to apply to your modified version as well. |
|
57 |
|
|
|
58 |
|
#serial 5 |
|
59 |
|
|
|
60 |
|
AC_DEFUN([AX_CHECK_COMPILE_FLAG], |
|
61 |
|
[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF |
|
62 |
|
AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl |
|
63 |
|
AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ |
|
64 |
|
ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS |
|
65 |
|
_AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" |
|
66 |
|
AC_COMPILE_IFELSE([m4_default([$5],[AC_LANG_PROGRAM()])], |
|
67 |
|
[AS_VAR_SET(CACHEVAR,[yes])], |
|
68 |
|
[AS_VAR_SET(CACHEVAR,[no])]) |
|
69 |
|
_AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) |
|
70 |
|
AS_VAR_IF(CACHEVAR,yes, |
|
71 |
|
[m4_default([$2], :)], |
|
72 |
|
[m4_default([$3], :)]) |
|
73 |
|
AS_VAR_POPDEF([CACHEVAR])dnl |
|
74 |
|
])dnl AX_CHECK_COMPILE_FLAGS |