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- # ===========================================================================
- # http://www.gnu.org/software/autoconf-archive/ax_append_flag.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE])
- #
- # DESCRIPTION
- #
- # FLAG is appended to the FLAGS-VARIABLE shell variable, with a space
- # added in between.
- #
- # If FLAGS-VARIABLE is not specified, the current language's flags (e.g.
- # CFLAGS) is used. FLAGS-VARIABLE is not changed if it already contains
- # FLAG. If FLAGS-VARIABLE is unset in the shell, it is set to exactly
- # FLAG.
- #
- # NOTE: Implementation based on AX_CFLAGS_GCC_OPTION.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
- # Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
- #
- # This program is free software: you can redistribute it and/or modify it
- # under the terms of the GNU General Public License as published by the
- # Free Software Foundation, either version 3 of the License, or (at your
- # option) any later version.
- #
- # This program is distributed in the hope that it will be useful, but
- # WITHOUT ANY WARRANTY; without even the implied warranty of
- # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- # Public License for more details.
- #
- # You should have received a copy of the GNU General Public License along
- # with this program. If not, see <http://www.gnu.org/licenses/>.
- #
- # As a special exception, the respective Autoconf Macro's copyright owner
- # gives unlimited permission to copy, distribute and modify the configure
- # scripts that are the output of Autoconf when processing the Macro. You
- # need not follow the terms of the GNU General Public License when using
- # or distributing such scripts, even though portions of the text of the
- # Macro appear in them. The GNU General Public License (GPL) does govern
- # all other use of the material that constitutes the Autoconf Macro.
- #
- # This special exception to the GPL applies to versions of the Autoconf
- # Macro released by the Autoconf Archive. When you make and distribute a
- # modified version of the Autoconf Macro, you may extend this special
- # exception to the GPL to apply to your modified version as well.
-
- #serial 6
-
- AC_DEFUN([AX_APPEND_FLAG],
- [dnl
- AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_SET_IF
- AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[FLAGS])])
- AS_VAR_SET_IF(FLAGS,[
- AS_CASE([" AS_VAR_GET(FLAGS) "],
- [*" $1 "*], [AC_RUN_LOG([: FLAGS already contains $1])],
- [
- AS_VAR_APPEND(FLAGS,[" $1"])
- AC_RUN_LOG([: FLAGS="$FLAGS"])
- ])
- ],
- [
- AS_VAR_SET(FLAGS,[$1])
- AC_RUN_LOG([: FLAGS="$FLAGS"])
- ])
- AS_VAR_POPDEF([FLAGS])dnl
- ])dnl AX_APPEND_FLAG
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