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Diffstat (limited to 'm4/ax_append_flag.m4')
-rw-r--r-- | m4/ax_append_flag.m4 | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/m4/ax_append_flag.m4 b/m4/ax_append_flag.m4 new file mode 100644 index 00000000..1d38b76f --- /dev/null +++ b/m4/ax_append_flag.m4 | |||
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1 | # =========================================================================== | ||
2 | # http://www.gnu.org/software/autoconf-archive/ax_append_flag.html | ||
3 | # =========================================================================== | ||
4 | # | ||
5 | # SYNOPSIS | ||
6 | # | ||
7 | # AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE]) | ||
8 | # | ||
9 | # DESCRIPTION | ||
10 | # | ||
11 | # FLAG is appended to the FLAGS-VARIABLE shell variable, with a space | ||
12 | # added in between. | ||
13 | # | ||
14 | # If FLAGS-VARIABLE is not specified, the current language's flags (e.g. | ||
15 | # CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains | ||
16 | # FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly | ||
17 | # FLAG. | ||
18 | # | ||
19 | # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. | ||
20 | # | ||
21 | # LICENSE | ||
22 | # | ||
23 | # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de> | ||
24 | # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> | ||
25 | # | ||
26 | # This program is free software: you can redistribute it and/or modify it | ||
27 | # under the terms of the GNU General Public License as published by the | ||
28 | # Free Software Foundation, either version 3 of the License, or (at your | ||
29 | # option) any later version. | ||
30 | # | ||
31 | # This program is distributed in the hope that it will be useful, but | ||
32 | # WITHOUT ANY WARRANTY; without even the implied warranty of | ||
33 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General | ||
34 | # Public License for more details. | ||
35 | # | ||
36 | # You should have received a copy of the GNU General Public License along | ||
37 | # with this program. If not, see <http://www.gnu.org/licenses/>. | ||
38 | # | ||
39 | # As a special exception, the respective Autoconf Macro's copyright owner | ||
40 | # gives unlimited permission to copy, distribute and modify the configure | ||
41 | # scripts that are the output of Autoconf when processing the Macro. You | ||
42 | # need not follow the terms of the GNU General Public License when using | ||
43 | # or distributing such scripts, even though portions of the text of the | ||
44 | # Macro appear in them. The GNU General Public License (GPL) does govern | ||
45 | # all other use of the material that constitutes the Autoconf Macro. | ||
46 | # | ||
47 | # This special exception to the GPL applies to versions of the Autoconf | ||
48 | # Macro released by the Autoconf Archive. When you make and distribute a | ||
49 | # modified version of the Autoconf Macro, you may extend this special | ||
50 | # exception to the GPL to apply to your modified version as well. | ||
51 | |||
52 | #serial 2 | ||
53 | |||
54 | AC_DEFUN([AX_APPEND_FLAG], | ||
55 | [AC_PREREQ(2.59)dnl for _AC_LANG_PREFIX | ||
56 | AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])dnl | ||
57 | AS_VAR_SET_IF(FLAGS, | ||
58 | [case " AS_VAR_GET(FLAGS) " in | ||
59 | *" $1 "*) | ||
60 | AC_RUN_LOG([: FLAGS already contains $1]) | ||
61 | ;; | ||
62 | *) | ||
63 | AC_RUN_LOG([: FLAGS="$FLAGS $1"]) | ||
64 | AS_VAR_SET(FLAGS, ["AS_VAR_GET(FLAGS) $1"]) | ||
65 | ;; | ||
66 | esac], | ||
67 | [AS_VAR_SET(FLAGS,["$1"])]) | ||
68 | AS_VAR_POPDEF([FLAGS])dnl | ||
69 | ])dnl AX_APPEND_FLAG | ||