OpenVPN/openvpn
1
0
Fork 0
mirror of https://github.com/OpenVPN/openvpn.git synced 2025-05-09 05:31:05 +08:00
Code Issues Packages Projects Releases Wiki Activity

Get rid of ax_check_compile_flag.m4

Browse Source 
The macro was too new for some of the platforms we still support.  In
particular, centos/rhel 6 and opensolaris 10.  To work around that, we
introduce our own simpler and more tailored ACL_CHECK_ADD_COMPILE_FLAGS
macro, that not only checks but also sets the flags in CFLAGS if it is
accepted.  Since this doesn't use new-and-shine autoconf features, it
should also work on the legacy platforms.

Signed-off-by: Steffan Karger <steffan@karger.me>
Acked-by: Gert Doering <gert@greenie.muc.de>
Message-Id: <20180220202508.16201-1-steffan@karger.me>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg16515.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>
(cherry picked from commit 6a5d10e96b9ad2f9a9472aeee8cdb7c02fe4d050)
This commit is contained in:
Steffan Karger 2018-02-20 21:25:08 +01:00 committed by Gert Doering
parent e9b85ebd28
commit fc70bc8b30
2 changed files with 10 additions and 82 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
configure.ac
View File

@ -1286,15 +1286,17 @@ if test "${enable_pkcs11}" = "yes"; then
) )
fi fi
AX_CHECK_COMPILE_FLAG( AC_DEFUN([ACL_CHECK_ADD_COMPILE_FLAGS], [
[-Wno-unused-function], old_cflags="$CFLAGS"
[CFLAGS="-Wno-unused-function ${CFLAGS}"] CFLAGS="$1 $CFLAGS"
AC_MSG_CHECKING([whether the compiler acceppts $1])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM()], [AC_MSG_RESULT([yes])],
[AC_MSG_RESULT([no]); CFLAGS="$old_cflags"])]
) )
AX_CHECK_COMPILE_FLAG(
[-Wno-unused-parameter], ACL_CHECK_ADD_COMPILE_FLAGS([-Wno-unused-function])
[CFLAGS="-Wno-unused-parameter ${CFLAGS}"] ACL_CHECK_ADD_COMPILE_FLAGS([-Wno-unused-parameter])
) ACL_CHECK_ADD_COMPILE_FLAGS([-Wall])
AX_CHECK_COMPILE_FLAG([-Wall], [CFLAGS="-Wall ${CFLAGS}"])
if test "${enable_pedantic}" = "yes"; then if test "${enable_pedantic}" = "yes"; then
enable_strict="yes" enable_strict="yes"

74
m4/ax_check_compile_flag.m4
View File

@ -1,74 +0,0 @@
# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_check_compile_flag.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_CHECK_COMPILE_FLAG(FLAG, [ACTION-SUCCESS], [ACTION-FAILURE], [EXTRA-FLAGS], [INPUT])
#
# DESCRIPTION
#
# Check whether the given FLAG works with the current language's compiler
# or gives 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 is thus made with
# the flags: "CFLAGS EXTRA-FLAGS FLAG". This can for example be used to
# force the compiler to issue an error when a bad flag is given.
#
# INPUT gives an alternative input source to AC_COMPILE_IFELSE.
#
# NOTE: Implementation based on AX_CFLAGS_GCC_OPTION. Please keep this
# macro in sync with AX_CHECK_{PREPROC,LINK}_FLAG.
#
# LICENSE
#
# Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
# Copyright (c) 2011 Maarten Bosmans <mkbosmans@gmail.com>
#
# 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 <https://www.gnu.org/licenses/>.
#
# 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 5
AC_DEFUN([AX_CHECK_COMPILE_FLAG],
[AC_PREREQ(2.64)dnl for _AC_LANG_PREFIX and AS_VAR_IF
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([m4_default([$5],[AC_LANG_PROGRAM()])],
[AS_VAR_SET(CACHEVAR,[yes])],
[AS_VAR_SET(CACHEVAR,[no])])
_AC_LANG_PREFIX[]FLAGS=$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