1# ============================================================================ 2# https://www.gnu.org/software/autoconf-archive/ax_append_compile_flags.html 3# ============================================================================ 4# 5# SYNOPSIS 6# 7# AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS], [INPUT]) 8# 9# DESCRIPTION 10# 11# For every FLAG1, FLAG2 it is checked whether the compiler works with the 12# flag. If it does, the flag is added FLAGS-VARIABLE 13# 14# If FLAGS-VARIABLE is not specified, the current language's flags (e.g. 15# CFLAGS) is used. During the check the flag is always added to the 16# current language's flags. 17# 18# If EXTRA-FLAGS is defined, it is added to the current language's default 19# flags (e.g. CFLAGS) when the check is done. The check is thus made with 20# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to 21# force the compiler to issue an error when a bad flag is given. 22# 23# INPUT gives an alternative input source to AC_COMPILE_IFELSE. 24# 25# NOTE: This macro depends on the AX_APPEND_FLAG and 26# AX_CHECK_COMPILE_FLAG. Please keep this macro in sync with 27# AX_APPEND_LINK_FLAGS. 28# 29# LICENSE 30# 31# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com> 32# 33# Copying and distribution of this file, with or without modification, are 34# permitted in any medium without royalty provided the copyright notice 35# and this notice are preserved. This file is offered as-is, without any 36# warranty. 37 38#serial 7 39 40AC_DEFUN([AX_APPEND_COMPILE_FLAGS], 41[AX_REQUIRE_DEFINED([AX_CHECK_COMPILE_FLAG]) 42AX_REQUIRE_DEFINED([AX_APPEND_FLAG]) 43for flag in $1; do 44 AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3], [$4]) 45done 46])dnl AX_APPEND_COMPILE_FLAGS 47