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# Copying and distribution of this file, with or without modification, are 32# permitted in any medium without royalty provided the copyright notice 33# and this notice are preserved. This file is offered as-is, without any 34# warranty. 35 36#serial 7 37 38AC_DEFUN([AX_APPEND_LINK_FLAGS], 39[AX_REQUIRE_DEFINED([AX_CHECK_LINK_FLAG]) 40AX_REQUIRE_DEFINED([AX_APPEND_FLAG]) 41for flag in $1; do 42 AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2], [LDFLAGS])])], [], [$3], [$4]) 43done 44])dnl AX_APPEND_LINK_FLAGS 45