forked from openkylin/imagemagick
52 lines
1.6 KiB
Plaintext
52 lines
1.6 KiB
Plaintext
# ===========================================================================
|
|
# https://www.gnu.org/software/autoconf-archive/ax_prepend_flag.html
|
|
# ===========================================================================
|
|
#
|
|
# SYNOPSIS
|
|
#
|
|
# AX_PREPEND_FLAG(FLAG, [FLAGS-VARIABLE])
|
|
#
|
|
# DESCRIPTION
|
|
#
|
|
# FLAG is added to the front of 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_APPEND_FLAG.
|
|
#
|
|
# LICENSE
|
|
#
|
|
# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
|
|
# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
|
|
# Copyright (c) 2018 John Zaitseff <J.Zaitseff@zap.org.au>
|
|
#
|
|
# Copying and distribution of this file, with or without modification, are
|
|
# permitted in any medium without royalty provided the copyright notice
|
|
# and this notice are preserved. This file is offered as-is, without any
|
|
# warranty.
|
|
|
|
#serial 2
|
|
|
|
AC_DEFUN([AX_PREPEND_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])],
|
|
[
|
|
FLAGS="$1 $FLAGS"
|
|
AC_RUN_LOG([: FLAGS="$FLAGS"])
|
|
])
|
|
],
|
|
[
|
|
AS_VAR_SET(FLAGS,[$1])
|
|
AC_RUN_LOG([: FLAGS="$FLAGS"])
|
|
])
|
|
AS_VAR_POPDEF([FLAGS])dnl
|
|
])dnl AX_PREPEND_FLAG
|