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# =========================================================================== | ||
# https://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 <https://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 7 | ||
|
||
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 |