From 7eba9d92f76e010426797fd355c495dd3e3312d9 Mon Sep 17 00:00:00 2001 From: Maarten Bosmans Date: Sat, 25 Jun 2011 16:36:06 +0200 Subject: build-sys: Use ax_check_flag macros from autoconf archive Those macros cover almost all functionality of attributes.m4 that was used, so that file can be removed. The CC_NOUNDEFINED macro is used directly in configure.ac. --- m4/ax_check_flag.m4 | 147 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 147 insertions(+) create mode 100644 m4/ax_check_flag.m4 (limited to 'm4/ax_check_flag.m4') diff --git a/m4/ax_check_flag.m4 b/m4/ax_check_flag.m4 new file mode 100644 index 00000000..52405fd4 --- /dev/null +++ b/m4/ax_check_flag.m4 @@ -0,0 +1,147 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_check_flag.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_CHECK_PREPROC_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) +# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) +# AX_CHECK_LINK_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS]) +# AX_APPEND_FLAG(FLAG, [FLAGS-VARIABLE]) +# AX_APPEND_COMPILE_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS]) +# AX_APPEND_LINK_FLAGS([FLAG1 FLAG2 ...], [FLAGS-VARIABLE], [EXTRA-FLAGS]) +# +# DESCRIPTION +# +# Check whether the given FLAG works with the current language's +# preprocessor/compiler/linker, or whether they give an error. (Warnings, +# however, are ignored.) +# +# ACTION-SUCCESS/ACTION-FAILURE are shell commands to execute on +# success/failure. +# +# If EXTRA-FLAGS is defined, it is added to the current language's default +# flags (e.g. CFLAGS) when the check is done. The check us thus made +# with the following flags: "CFLAGS EXTRA-FLAGS FLAG". EXTRA-FLAGS can +# for example be used to force the compiler to issue an error when a bad +# flag is given. +# +# AX_APPEND_FLAG appends the FLAG to the FLAG-VARIABLE shell variable or +# the current language's flags if not specified. FLAG is not added to +# FLAG-VARIABLE if it is already in the shell variable. +# +# AX_APPEND_COMPILE_FLAGS checks for each FLAG1, FLAG2, etc. using +# AX_CHECK_COMPILE_FLAG and if the check is successful the flag is added +# to the appropriate FLAGS variable with AX_APPEND_FLAG. The +# FLAGS-VARIABLE and EXTRA-FLAGS arguments are the same as in the other +# macros. AX_APPEND_LINK_FLAGS does the same for linker flags. +# +# NOTE: Based on AX_CHECK_COMPILER_FLAGS and AX_CFLAGS_GCC_OPTION. +# +# LICENSE +# +# Copyright (c) 2008 Guido U. Draheim +# Copyright (c) 2009 Steven G. Johnson +# Copyright (c) 2009 Matteo Frigo +# Copyright (c) 2011 Maarten Bosmans +# +# 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 . +# +# 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 2 + +AC_DEFUN([AX_CHECK_PREPROC_FLAG], +[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]cppflags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG preprocessor accepts $1], CACHEVAR, [ + ax_check_save_flags=$CPPFLAGS + CPPFLAGS="$CPPFLAGS $4 $1" + AC_PREPROC_IFELSE([AC_LANG_PROGRAM()], + [AS_VAR_SET([CACHEVAR],[yes])], + [AS_VAR_SET([CACHEVAR],[no])]) + CPPFLAGS=$ax_check_save_flags]) +AS_VAR_IF([CACHEVAR], "yes", + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_PREPROC_FLAGS + +AC_DEFUN([AX_CHECK_COMPILE_FLAG], +[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX +AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_[]_AC_LANG_ABBREV[]flags_$4_$1])dnl +AC_CACHE_CHECK([whether _AC_LANG compiler accepts $1], CACHEVAR, [ + ax_check_save_flags=$[]_AC_LANG_PREFIX[]FLAGS + _AC_LANG_PREFIX[]FLAGS="$[]_AC_LANG_PREFIX[]FLAGS $4 $1" + AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], + [AS_VAR_SET([CACHEVAR],[yes])], + [AS_VAR_SET([CACHEVAR],[no])]) + _AC_LANG_PREFIX[]FLAGS=$ax_check_save_flags]) +AS_VAR_IF([CACHEVAR], "yes", + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_COMPILE_FLAGS + +AC_DEFUN([AX_CHECK_LINK_FLAG], +[AS_VAR_PUSHDEF([CACHEVAR],[ax_cv_check_ldflags_$4_$1])dnl +AC_CACHE_CHECK([whether the linker accepts $1], CACHEVAR, [ + ax_check_save_flags=$LDFLAGS + LDFLAGS="$LDFLAGS $4 $1" + AC_LINK_IFELSE([AC_LANG_PROGRAM()], + [AS_VAR_SET([CACHEVAR],[yes])], + [AS_VAR_SET([CACHEVAR],[no])]) + LDFLAGS=$ax_check_save_flags]) +AS_VAR_IF([CACHEVAR], "yes", + [m4_default([$2], :)], + [m4_default([$3], :)]) +AS_VAR_POPDEF([CACHEVAR])dnl +])dnl AX_CHECK_LINK_FLAGS + + +AC_DEFUN([AX_APPEND_FLAG], +[AC_PREREQ(2.59) dnl for _AC_LANG_PREFIX +AC_REQUIRE([AC_PROG_GREP]) +AS_VAR_PUSHDEF([FLAGS], [m4_default($2,_AC_LANG_PREFIX[]FLAGS)])dnl +AS_VAR_SET_IF([FLAGS], + [AS_IF([AS_ECHO(" $[]FLAGS ") | $GREP " $1 " 2>&1 >/dev/null], + [AC_RUN_LOG([: FLAGS already contains $1])], + [AC_RUN_LOG([: FLAGS="$FLAGS $1"]) + AS_VAR_APPEND([FLAGS], [" $1"])])], + [AS_VAR_SET([FLAGS],[$1])]) +AS_VAR_POPDEF([FLAGS])dnl +])dnl AX_APPEND_FLAG + +AC_DEFUN([AX_APPEND_COMPILE_FLAGS], +[for flag in $1; do + AX_CHECK_COMPILE_FLAG([$flag], [AX_APPEND_FLAG([$flag], [$2])], [], [$3]) +done +])dnl AX_APPEND_COMPILE_FLAGS + +AC_DEFUN([AX_APPEND_LINK_FLAGS], +[for flag in $1; do + AX_CHECK_LINK_FLAG([$flag], [AX_APPEND_FLAG([$flag], [m4_default([$2], [LDFLAGS])])], [], [$3]) +done +])dnl AX_APPEND_LINK_FLAGS -- cgit