mirror of
https://github.com/openvswitch/ovs
synced 2025-08-22 01:51:26 +00:00
994bfc2985
This should help address a recurring problem. This change makes the OVS header files, when parsed by a C++ compiler, require C++11 or later. Signed-off-by: Ben Pfaff <blp@ovn.org> Acked-by: Russell Bryant <russell@ovn.org>
639 lines
21 KiB
Plaintext
639 lines
21 KiB
Plaintext
# -*- autoconf -*-
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# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Nicira, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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m4_include([m4/compat.m4])
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dnl Checks for --enable-coverage and updates CFLAGS and LDFLAGS appropriately.
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AC_DEFUN([OVS_CHECK_COVERAGE],
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[AC_REQUIRE([AC_PROG_CC])
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AC_ARG_ENABLE(
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[coverage],
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[AC_HELP_STRING([--enable-coverage],
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[Enable gcov coverage tool.])],
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[case "${enableval}" in
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(yes) coverage=true ;;
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(no) coverage=false ;;
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(*) AC_MSG_ERROR([bad value ${enableval} for --enable-coverage]) ;;
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esac],
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[coverage=false])
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if $coverage; then
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# Autoconf by default puts "-g -O2" in CFLAGS. We need to remove the -O2
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# option for coverage to be useful. This does it without otherwise
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# interfering with anything that the user might have put there.
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old_CFLAGS=$CFLAGS
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CFLAGS=
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for option in $old_CFLAGS; do
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case $option in
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(-O2) ;;
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(*) CFLAGS="$CFLAGS $option" ;;
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esac
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done
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OVS_CFLAGS="$OVS_CFLAGS --coverage"
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OVS_LDFLAGS="$OVS_LDFLAGS --coverage"
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fi])
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dnl Checks for --enable-ndebug and defines NDEBUG if it is specified.
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AC_DEFUN([OVS_CHECK_NDEBUG],
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[AC_ARG_ENABLE(
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[ndebug],
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[AC_HELP_STRING([--enable-ndebug],
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[Disable debugging features for max performance])],
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[case "${enableval}" in
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(yes) ndebug=true ;;
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(no) ndebug=false ;;
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(*) AC_MSG_ERROR([bad value ${enableval} for --enable-ndebug]) ;;
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esac],
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[ndebug=false])
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AM_CONDITIONAL([NDEBUG], [test x$ndebug = xtrue])])
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dnl Checks for ESX.
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AC_DEFUN([OVS_CHECK_ESX],
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[AC_CHECK_HEADER([vmware.h],
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[ESX=yes],
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[ESX=no])
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AM_CONDITIONAL([ESX], [test "$ESX" = yes])
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if test "$ESX" = yes; then
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AC_DEFINE([ESX], [1], [Define to 1 if building on ESX.])
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fi])
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dnl Checks for MSVC x64 compiler.
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AC_DEFUN([OVS_CHECK_WIN64],
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[AC_CACHE_CHECK(
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[for MSVC x64 compiler],
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[cl_cv_x64],
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[dnl "cl" writes x64 output to stdin:
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if (cl) 2>&1 | grep 'x64' >/dev/null 2>&1; then
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cl_cv_x64=yes
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MSVC64_LDFLAGS=" /MACHINE:X64 "
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else
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cl_cv_x64=no
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MSVC64_LDFLAGS=""
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fi])
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AC_SUBST([MSVC64_LDFLAGS])
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])
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dnl Checks for WINDOWS.
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AC_DEFUN([OVS_CHECK_WIN32],
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[AC_CHECK_HEADER([windows.h],
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[WIN32=yes],
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[WIN32=no])
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AM_CONDITIONAL([WIN32], [test "$WIN32" = yes])
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if test "$WIN32" = yes; then
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AC_ARG_WITH([pthread],
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[AS_HELP_STRING([--with-pthread=DIR],
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[root of the pthread-win32 directory])],
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[
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case "$withval" in
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"" | y | ye | yes | n | no)
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AC_MSG_ERROR([Invalid --with-pthread value])
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;;
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*)
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if (cl) 2>&1 | grep 'x64' >/dev/null 2>&1; then
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cl_cv_x64=yes
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else
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cl_cv_x64=no
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fi
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if test "$cl_cv_x64" = yes; then
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PTHREAD_WIN32_DIR=$withval/lib/x64
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PTHREAD_WIN32_DIR_DLL=/$(echo ${withval} | ${SED} -e 's/://')/dll/x64
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PTHREAD_WIN32_DIR_DLL_WIN_FORM=$withval/dll/x64
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else
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PTHREAD_WIN32_DIR=$withval/lib/x86
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PTHREAD_WIN32_DIR_DLL=/$(echo ${withval} | ${SED} -e 's/://')/dll/x86
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PTHREAD_WIN32_DIR_DLL_WIN_FORM=$withval/dll/x86
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fi
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PTHREAD_INCLUDES=-I$withval/include
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PTHREAD_LDFLAGS=-L$PTHREAD_WIN32_DIR
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PTHREAD_LIBS="-lpthreadVC2"
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AC_SUBST([PTHREAD_WIN32_DIR_DLL_WIN_FORM])
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AC_SUBST([PTHREAD_WIN32_DIR_DLL])
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AC_SUBST([PTHREAD_INCLUDES])
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AC_SUBST([PTHREAD_LDFLAGS])
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AC_SUBST([PTHREAD_LIBS])
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;;
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esac
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], [
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AC_MSG_ERROR([pthread directory not specified])
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]
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)
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AC_ARG_WITH([debug],
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[AS_HELP_STRING([--with-debug],
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[Build without compiler optimizations])],
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[
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MSVC_CFLAGS="-O0"
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AC_SUBST([MSVC_CFLAGS])
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], [
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MSVC_CFLAGS="-O2"
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AC_SUBST([MSVC_CFLAGS])
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]
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)
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AC_DEFINE([WIN32], [1], [Define to 1 if building on WIN32.])
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AH_BOTTOM([#ifdef WIN32
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#include "include/windows/windefs.h"
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#endif])
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fi])
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dnl OVS_CHECK_WINDOWS
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dnl
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dnl Configure Visual Studio solution build
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AC_DEFUN([OVS_CHECK_VISUAL_STUDIO_DDK], [
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AC_ARG_WITH([vstudiotarget],
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[AS_HELP_STRING([--with-vstudiotarget=target_type],
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[Target type: Debug/Release])],
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[
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case "$withval" in
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"Release") ;;
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"Debug") ;;
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*) AC_MSG_ERROR([No valid Visual Studio configuration found]) ;;
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esac
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VSTUDIO_CONFIG=$withval
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], [
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VSTUDIO_CONFIG=
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]
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)
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AC_SUBST([VSTUDIO_CONFIG])
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AC_DEFINE([VSTUDIO_DDK], [1], [System uses the Visual Studio build target.])
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AM_CONDITIONAL([VSTUDIO_DDK], [test -n "$VSTUDIO_CONFIG"])
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])
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dnl Checks for Netlink support.
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AC_DEFUN([OVS_CHECK_NETLINK],
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[AC_CHECK_HEADER([linux/netlink.h],
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[HAVE_NETLINK=yes],
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[HAVE_NETLINK=no],
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[#include <sys/socket.h>
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])
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AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
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if test "$HAVE_NETLINK" = yes; then
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AC_DEFINE([HAVE_NETLINK], [1],
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[Define to 1 if Netlink protocol is available.])
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fi])
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dnl Checks for libcap-ng.
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AC_DEFUN([OVS_CHECK_LIBCAPNG],
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[AC_ARG_ENABLE(
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[libcapng],
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[AC_HELP_STRING([--disable-libcapng], [Disable Linux capability support])],
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[case "${enableval}" in
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(yes) libcapng=true ;;
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(no) libcapng=false ;;
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(*) AC_MSG_ERROR([bad value ${enableval} for --enable-libcapng]) ;;
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esac],
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[libcapng=check])
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if test "$libcapng" != false; then
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AC_CHECK_LIB([cap-ng], [capng_clear], [HAVE_LIBCAPNG=yes])
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if test "$HAVE_LIBCAPNG" != yes; then
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if test "$libcapng" = true ; then
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AC_MSG_ERROR([libcap-ng support requested, but not found])
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fi
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if test "$libcapng" = check ; then
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AC_MSG_WARN([cannot find libcap-ng.
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--user option will not be supported on Linux.
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(you may use --disable-libcapng to suppress this warning). ])
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fi
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fi
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fi
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AC_SUBST([HAVE_LIBCAPNG])
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AM_CONDITIONAL([HAVE_LIBCAPNG], [test "$HAVE_LIBCAPNG" = yes])
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if test "$HAVE_LIBCAPNG" = yes; then
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AC_DEFINE([HAVE_LIBCAPNG], [1],
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[Define to 1 if libcap-ng is available.])
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CAPNG_LDADD="-lcap-ng"
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AC_SUBST([CAPNG_LDADD])
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fi])
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dnl Checks for OpenSSL.
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AC_DEFUN([OVS_CHECK_OPENSSL],
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[AC_ARG_ENABLE(
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[ssl],
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[AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
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[case "${enableval}" in
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(yes) ssl=true ;;
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(no) ssl=false ;;
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(*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
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esac],
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[ssl=check])
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if test "$ssl" != false; then
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AX_CHECK_OPENSSL(
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[HAVE_OPENSSL=yes],
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[HAVE_OPENSSL=no
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if test "$ssl" = check; then
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AC_MSG_WARN([Cannot find openssl:
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$SSL_PKG_ERRORS
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OpenFlow connections over SSL will not be supported.
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(You may use --disable-ssl to suppress this warning.)])
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else
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AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
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fi])
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else
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HAVE_OPENSSL=no
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fi
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AC_SUBST([HAVE_OPENSSL])
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AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
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if test "$HAVE_OPENSSL" = yes; then
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AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
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fi])
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dnl Checks for libraries needed by lib/socket-util.c.
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AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
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[AC_CHECK_LIB([socket], [connect])
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AC_SEARCH_LIBS([gethostbyname], [resolv])])
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dnl Checks for the directory in which to store the PKI.
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AC_DEFUN([OVS_CHECK_PKIDIR],
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[AC_ARG_WITH(
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[pkidir],
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AC_HELP_STRING([--with-pkidir=DIR],
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[PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
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[PKIDIR=$withval],
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[PKIDIR='${localstatedir}/lib/openvswitch/pki'])
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AC_SUBST([PKIDIR])])
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dnl Checks for the directory in which to store pidfiles.
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AC_DEFUN([OVS_CHECK_RUNDIR],
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[AC_ARG_WITH(
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[rundir],
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AC_HELP_STRING([--with-rundir=DIR],
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[directory used for pidfiles
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[[LOCALSTATEDIR/run/openvswitch]]]),
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[RUNDIR=$withval],
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[RUNDIR='${localstatedir}/run/openvswitch'])
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AC_SUBST([RUNDIR])])
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dnl Checks for the directory in which to store logs.
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AC_DEFUN([OVS_CHECK_LOGDIR],
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[AC_ARG_WITH(
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[logdir],
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AC_HELP_STRING([--with-logdir=DIR],
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[directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
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[LOGDIR=$withval],
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[LOGDIR='${localstatedir}/log/${PACKAGE}'])
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AC_SUBST([LOGDIR])])
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dnl Checks for the directory in which to store the Open vSwitch database.
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AC_DEFUN([OVS_CHECK_DBDIR],
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[AC_ARG_WITH(
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[dbdir],
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AC_HELP_STRING([--with-dbdir=DIR],
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[directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
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[DBDIR=$withval],
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[DBDIR='${sysconfdir}/${PACKAGE}'])
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AC_SUBST([DBDIR])])
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dnl Defines HAVE_BACKTRACE if backtrace() is found.
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AC_DEFUN([OVS_CHECK_BACKTRACE],
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[AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
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[AC_DEFINE([HAVE_BACKTRACE], [1],
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[Define to 1 if you have backtrace(3).])])])
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dnl Defines HAVE_PERF_EVENT if linux/perf_event.h is found.
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AC_DEFUN([OVS_CHECK_PERF_EVENT],
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[AC_CHECK_HEADERS([linux/perf_event.h])])
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dnl Checks for valgrind/valgrind.h.
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AC_DEFUN([OVS_CHECK_VALGRIND],
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[AC_CHECK_HEADERS([valgrind/valgrind.h])])
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dnl Checks for Python 2.x, x >= 7.
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AC_DEFUN([OVS_CHECK_PYTHON],
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[AC_CACHE_CHECK(
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[for Python 2.x for x >= 7],
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[ovs_cv_python],
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[if test -n "$PYTHON"; then
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ovs_cv_python=$PYTHON
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else
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ovs_cv_python=no
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for binary in python python2.7; do
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ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for dir in $PATH; do
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IFS=$ovs_save_IFS
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test -z "$dir" && dir=.
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if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
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if sys.hexversion >= 0x02070000 and sys.hexversion < 0x03000000:
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sys.exit(0)
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else:
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sys.exit(1)'; then
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ovs_cv_python=$dir/$binary
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break 2
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fi
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done
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done
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fi])
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# Set $PYTHON from cache variable.
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if test $ovs_cv_python = no; then
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AC_MSG_ERROR([cannot find python 2.7 or higher.])
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fi
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AM_MISSING_PROG([PYTHON], [python])
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PYTHON=$ovs_cv_python
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# HAVE_PYTHON is always true. (Python has not always been a build
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# requirement, so this variable is now obsolete.)
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AC_SUBST([HAVE_PYTHON])
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HAVE_PYTHON=yes
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AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])
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AC_MSG_CHECKING([whether $PYTHON has six library])
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if ! $PYTHON -c 'import six ; six.moves.range' >&AS_MESSAGE_LOG_FD 2>&1; then
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AC_MSG_ERROR([Missing Python six library or version too old.])
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fi
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AC_MSG_RESULT([yes])])
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dnl Checks for Python 3.x, x >= 4.
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AC_DEFUN([OVS_CHECK_PYTHON3],
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[AC_CACHE_CHECK(
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[for Python 3.x for x >= 4],
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[ovs_cv_python3],
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[if test -n "$PYTHON3"; then
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ovs_cv_python3=$PYTHON3
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else
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ovs_cv_python3=no
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for binary in python3 python3.4; do
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ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
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for dir in $PATH; do
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IFS=$ovs_save_IFS
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test -z "$dir" && dir=.
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if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
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if sys.hexversion >= 0x03040000 and sys.hexversion < 0x04000000:
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sys.exit(0)
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else:
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sys.exit(1)'; then
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ovs_cv_python3=$dir/$binary
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break 2
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fi
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done
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done
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if test $ovs_cv_python3 != no; then
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if test -x "$ovs_cv_python3" && ! "$ovs_cv_python3" -c 'import six' >/dev/null 2>&1; then
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ovs_cv_python3=no
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AC_MSG_WARN([Missing Python six library.])
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fi
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fi
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fi])
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AC_SUBST([HAVE_PYTHON3])
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AM_MISSING_PROG([PYTHON3], [python3])
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if test $ovs_cv_python3 != no; then
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PYTHON3=$ovs_cv_python3
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HAVE_PYTHON3=yes
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else
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HAVE_PYTHON3=no
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fi
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AM_CONDITIONAL([HAVE_PYTHON3], [test "$HAVE_PYTHON3" = yes])])
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dnl Checks for flake8.
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AC_DEFUN([OVS_CHECK_FLAKE8],
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[AC_CACHE_CHECK(
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[for flake8],
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[ovs_cv_flake8],
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[if flake8 --version >/dev/null 2>&1; then
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ovs_cv_flake8=yes
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else
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ovs_cv_flake8=no
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fi])
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AM_CONDITIONAL([HAVE_FLAKE8], [test "$ovs_cv_flake8" = yes])])
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dnl Checks for sphinx.
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AC_DEFUN([OVS_CHECK_SPHINX],
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[AC_CACHE_CHECK(
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[for sphinx],
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[ovs_cv_sphinx],
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[if type sphinx-build >/dev/null 2>&1; then
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ovs_cv_sphinx=yes
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else
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ovs_cv_sphinx=no
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fi])
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AM_CONDITIONAL([HAVE_SPHINX], [test "$ovs_cv_sphinx" = yes])])
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dnl Checks for dot.
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AC_DEFUN([OVS_CHECK_DOT],
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[AC_CACHE_CHECK(
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[for dot],
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[ovs_cv_dot],
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[dnl "dot" writes -V output to stderr:
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if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
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ovs_cv_dot=yes
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else
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ovs_cv_dot=no
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fi])
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AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
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dnl Checks for groff.
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AC_DEFUN([OVS_CHECK_GROFF],
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[AC_CACHE_CHECK(
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[for groff],
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[ovs_cv_groff],
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[if (groff -v) >/dev/null 2>&1; then
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ovs_cv_groff=yes
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else
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ovs_cv_groff=no
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fi])
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AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
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dnl Checks for thread-local storage support.
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dnl
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dnl Checks whether the compiler and linker support the C11
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dnl thread_local macro from <threads.h>, and if so defines
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dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
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dnl support the GCC __thread extension, and if so defines
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dnl HAVE___THREAD.
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AC_DEFUN([OVS_CHECK_TLS],
|
|
[AC_CACHE_CHECK(
|
|
[whether $CC has <threads.h> that supports thread_local],
|
|
[ovs_cv_thread_local],
|
|
[AC_LINK_IFELSE(
|
|
[AC_LANG_PROGRAM([#include <threads.h>
|
|
static thread_local int var;], [return var;])],
|
|
[ovs_cv_thread_local=yes],
|
|
[ovs_cv_thread_local=no])])
|
|
if test $ovs_cv_thread_local = yes; then
|
|
AC_DEFINE([HAVE_THREAD_LOCAL], [1],
|
|
[Define to 1 if the C compiler and linker supports the C11
|
|
thread_local matcro defined in <threads.h>.])
|
|
else
|
|
AC_CACHE_CHECK(
|
|
[whether $CC supports __thread],
|
|
[ovs_cv___thread],
|
|
[AC_LINK_IFELSE(
|
|
[AC_LANG_PROGRAM([static __thread int var;], [return var;])],
|
|
[ovs_cv___thread=yes],
|
|
[ovs_cv___thread=no])])
|
|
if test $ovs_cv___thread = yes; then
|
|
AC_DEFINE([HAVE___THREAD], [1],
|
|
[Define to 1 if the C compiler and linker supports the
|
|
GCC __thread extenions.])
|
|
fi
|
|
fi])
|
|
|
|
dnl OVS_CHECK_ATOMIC_LIBS
|
|
dnl
|
|
dnl Check to see if -latomic is need for GCC atomic built-ins.
|
|
AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
|
|
[AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
|
|
|
|
dnl OVS_CHECK_GCC4_ATOMICS
|
|
dnl
|
|
dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
|
|
dnl A compile-time only check is not enough because the compiler defers
|
|
dnl unimplemented built-ins to libgcc, which sometimes also lacks
|
|
dnl implementations.
|
|
AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
|
|
[AC_CACHE_CHECK(
|
|
[whether $CC supports GCC 4.0+ atomic built-ins],
|
|
[ovs_cv_gcc4_atomics],
|
|
[AC_LINK_IFELSE(
|
|
[AC_LANG_PROGRAM([[#include <stdlib.h>
|
|
|
|
#define ovs_assert(expr) if (!(expr)) abort();
|
|
#define TEST_ATOMIC_TYPE(TYPE) \
|
|
{ \
|
|
TYPE x = 1; \
|
|
TYPE orig; \
|
|
\
|
|
__sync_synchronize(); \
|
|
ovs_assert(x == 1); \
|
|
\
|
|
__sync_synchronize(); \
|
|
x = 3; \
|
|
__sync_synchronize(); \
|
|
ovs_assert(x == 3); \
|
|
\
|
|
orig = __sync_fetch_and_add(&x, 1); \
|
|
ovs_assert(orig == 3); \
|
|
__sync_synchronize(); \
|
|
ovs_assert(x == 4); \
|
|
\
|
|
orig = __sync_fetch_and_sub(&x, 2); \
|
|
ovs_assert(orig == 4); \
|
|
__sync_synchronize(); \
|
|
ovs_assert(x == 2); \
|
|
\
|
|
orig = __sync_fetch_and_or(&x, 6); \
|
|
ovs_assert(orig == 2); \
|
|
__sync_synchronize(); \
|
|
ovs_assert(x == 6); \
|
|
\
|
|
orig = __sync_fetch_and_and(&x, 10); \
|
|
ovs_assert(orig == 6); \
|
|
__sync_synchronize(); \
|
|
ovs_assert(x == 2); \
|
|
\
|
|
orig = __sync_fetch_and_xor(&x, 10); \
|
|
ovs_assert(orig == 2); \
|
|
__sync_synchronize(); \
|
|
ovs_assert(x == 8); \
|
|
}]], [dnl
|
|
TEST_ATOMIC_TYPE(char);
|
|
TEST_ATOMIC_TYPE(unsigned char);
|
|
TEST_ATOMIC_TYPE(signed char);
|
|
TEST_ATOMIC_TYPE(short);
|
|
TEST_ATOMIC_TYPE(unsigned short);
|
|
TEST_ATOMIC_TYPE(int);
|
|
TEST_ATOMIC_TYPE(unsigned int);
|
|
TEST_ATOMIC_TYPE(long int);
|
|
TEST_ATOMIC_TYPE(unsigned long int);
|
|
TEST_ATOMIC_TYPE(long long int);
|
|
TEST_ATOMIC_TYPE(unsigned long long int);
|
|
])],
|
|
[ovs_cv_gcc4_atomics=yes],
|
|
[ovs_cv_gcc4_atomics=no])])
|
|
if test $ovs_cv_gcc4_atomics = yes; then
|
|
AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
|
|
[Define to 1 if the C compiler and linker supports the GCC 4.0+
|
|
atomic built-ins.])
|
|
fi])
|
|
|
|
dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
|
|
dnl
|
|
dnl Checks __atomic_always_lock_free(SIZE, 0)
|
|
AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
|
|
[AC_CACHE_CHECK(
|
|
[value of __atomic_always_lock_free($1)],
|
|
[ovs_cv_atomic_always_lock_free_$1],
|
|
[AC_COMPUTE_INT(
|
|
[ovs_cv_atomic_always_lock_free_$1],
|
|
[__atomic_always_lock_free($1, 0)],
|
|
[],
|
|
[ovs_cv_atomic_always_lock_free_$1=unsupported])])
|
|
if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
|
|
AC_DEFINE_UNQUOTED(
|
|
[ATOMIC_ALWAYS_LOCK_FREE_$1B],
|
|
[$ovs_cv_atomic_always_lock_free_$1],
|
|
[If the C compiler is GCC 4.7 or later, define to the return value of
|
|
__atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
|
|
an older version of GCC, the value does not matter.])
|
|
fi])
|
|
|
|
dnl OVS_CHECK_POSIX_AIO
|
|
AC_DEFUN([OVS_CHECK_POSIX_AIO],
|
|
[AC_SEARCH_LIBS([aio_write], [rt])
|
|
AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
|
|
|
|
dnl OVS_CHECK_INCLUDE_NEXT
|
|
AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
|
|
[AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
|
|
gl_CHECK_NEXT_HEADERS([$1])])
|
|
|
|
dnl OVS_CHECK_PRAGMA_MESSAGE
|
|
AC_DEFUN([OVS_CHECK_PRAGMA_MESSAGE],
|
|
[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
|
|
[[_Pragma("message(\"Checking for pragma message\")")
|
|
]])],
|
|
[AC_DEFINE(HAVE_PRAGMA_MESSAGE,1,[Define if compiler supports #pragma
|
|
message directive])])
|
|
])
|
|
|
|
dnl OVS_LIBTOOL_VERSIONS sets the major, minor, micro version information for
|
|
dnl OVS_LTINFO variable. This variable locks libtool information for shared
|
|
dnl objects, allowing multiple versions with different ABIs to coexist.
|
|
AC_DEFUN([OVS_LIBTOOL_VERSIONS],
|
|
[AC_MSG_CHECKING(linker output version information)
|
|
OVS_MAJOR=`echo "$PACKAGE_VERSION" | sed -e 's/[[.]].*//'`
|
|
OVS_MINOR=`echo "$PACKAGE_VERSION" | sed -e "s/^$OVS_MAJOR//" -e 's/^.//' -e 's/[[.]].*//'`
|
|
OVS_MICRO=`echo "$PACKAGE_VERSION" | sed -e "s/^$OVS_MAJOR.$OVS_MINOR//" -e 's/^.//' -e 's/[[^0-9]].*//'`
|
|
OVS_LT_RELINFO="-release $OVS_MAJOR.$OVS_MINOR"
|
|
OVS_LT_VERINFO="-version-info $LT_CURRENT:$OVS_MICRO"
|
|
OVS_LTINFO="$OVS_LT_RELINFO $OVS_LT_VERINFO"
|
|
AC_MSG_RESULT([libX-$OVS_MAJOR.$OVS_MINOR.so.$LT_CURRENT.0.$OVS_MICRO)])
|
|
AC_SUBST(OVS_LTINFO)
|
|
])
|
|
|
|
dnl OVS does not use C++ itself, but it provides public header files
|
|
dnl that a C++ compiler should accept, so when --enable-Werror is in
|
|
dnl effect and a C++ compiler is available, we enable building a C++
|
|
dnl source file that #includes all the public headers, as a way to
|
|
dnl ensure that they are acceptable as C++.
|
|
AC_DEFUN([OVS_CHECK_CXX],
|
|
[AC_REQUIRE([AC_PROG_CXX])
|
|
AC_REQUIRE([OVS_ENABLE_WERROR])
|
|
AX_CXX_COMPILE_STDCXX([11], [], [optional])
|
|
if test $enable_Werror = yes && test $HAVE_CXX11 = 1; then
|
|
enable_cxx=:
|
|
else
|
|
enable_cxx=false
|
|
fi
|
|
AM_CONDITIONAL([HAVE_CXX], [$enable_cxx])])
|