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 6 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
