| Jeremy Kerr | 0668cd4 | 2018-07-26 13:01:32 +0800 | [diff] [blame] | 1 | # =========================================================================== |
| 2 | # https://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 <https://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 7 |
| 53 | |
| 54 | AC_DEFUN([AX_APPEND_FLAG], |
| 55 | [dnl |
| 56 | AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF |
| 57 | AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])]) |
| 58 | AS_VAR_SET_IF(FLAGS,[ |
| 59 | AS_CASE([" AS_VAR_GET(FLAGS) "], |
| 60 | [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])], |
| 61 | [ |
| 62 | AS_VAR_APPEND(FLAGS,[" $1"]) |
| 63 | AC_RUN_LOG([: FLAGS="$FLAGS"]) |
| 64 | ]) |
| 65 | ], |
| 66 | [ |
| 67 | AS_VAR_SET(FLAGS,[$1]) |
| 68 | AC_RUN_LOG([: FLAGS="$FLAGS"]) |
| 69 | ]) |
| 70 | AS_VAR_POPDEF([FLAGS])dnl |
| 71 | ])dnl AX_APPEND_FLAG |