1# =========================================================================== 2# https://www.gnu.org/software/autoconf-archive/ax_append_link_flags.html 3# =========================================================================== 4# 5# SYNOPSIS 6# 7# AX_APPEND_LINK_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS], [INPUT]) 8# 9# DESCRIPTION 10# 11# For every FLAG1, FLAG2 it is checked whether the linker works with the 12# flag. If it does, the flag is added FLAGS-VARIABLE 13# 14# If FLAGS-VARIABLE is not specified, the linker's flags (LDFLAGS) is 15# used. During the check the flag is always added to the linker's flags. 16# 17# If EXTRA-FLAGS is defined, it is added to the linker's default flags 18# when the check is done. The check is thus made with the flags: "LDFLAGS 19# EXTRA-FLAGS FLAG". This can for example be used to force the linker to 20# issue an error when a bad flag is given. 21# 22# INPUT gives an alternative input source to AC_COMPILE_IFELSE. 23# 24# NOTE: This macro depends on the AX_APPEND_FLAG and AX_CHECK_LINK_FLAG. 25# Please keep this macro in sync with AX_APPEND_COMPILE_FLAGS. 26# 27# LICENSE 28# 29# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> 30# 31# This program is free software: you can redistribute it and/or modify it 32# under the terms of the GNU General Public License as published by the 33# Free Software Foundation, either version 3 of the License, or (at your 34# option) any later version. 35# 36# This program is distributed in the hope that it will be useful, but 37# WITHOUT ANY WARRANTY; without even the implied warranty of 38# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General 39# Public License for more details. 40# 41# You should have received a copy of the GNU General Public License along 42# with this program. If not, see <https://www.gnu.org/licenses/>. 43# 44# As a special exception, the respective Autoconf Macro's copyright owner 45# gives unlimited permission to copy, distribute and modify the configure 46# scripts that are the output of Autoconf when processing the Macro. You 47# need not follow the terms of the GNU General Public License when using 48# or distributing such scripts, even though portions of the text of the 49# Macro appear in them. The GNU General Public License (GPL) does govern 50# all other use of the material that constitutes the Autoconf Macro. 51# 52# This special exception to the GPL applies to versions of the Autoconf 53# Macro released by the Autoconf Archive. When you make and distribute a 54# modified version of the Autoconf Macro, you may extend this special 55# exception to the GPL to apply to your modified version as well. 56 57#serial 6 58 59AC_DEFUN([AX_APPEND_LINK_FLAGS], 60[AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG]) 61AX_REQUIRE_DEFINED([AX_APPEND_FLAG]) 62for flag in $1; do 63 AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2], [LDFLAGS])])], [], [$3], [$4]) 64done 65])dnl AX_APPEND_LINK_FLAGS 66