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# -*- autoconf -*-
# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
dnl OVS_ENABLE_WERROR
AC_DEFUN([OVS_ENABLE_WERROR],
[AC_ARG_ENABLE(
[Werror],
[AS_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
[], [enable_Werror=no])
AC_CONFIG_COMMANDS_PRE(
[if test "X$enable_Werror" = Xyes; then
OVS_CFLAGS="$OVS_CFLAGS -Werror"
fi])
# Unless --enable-Werror is specified, report but do not fail the build
# for errors reported by flake8.
if test "X$enable_Werror" = Xyes; then
FLAKE8_WERROR=
else
FLAKE8_WERROR=-
fi
AC_SUBST([FLAKE8_WERROR])
# If --enable-Werror is specified, fail the build on sparse warnings.
if test "X$enable_Werror" = Xyes; then
SPARSE_WERROR=-Wsparse-error
else
SPARSE_WERROR=
fi
AC_SUBST([SPARSE_WERROR])])
dnl Checks for net/if_dl.h.
dnl
dnl (We use this as a proxy for checking whether we're building on FreeBSD
dnl or NetBSD.)
AC_DEFUN([OVS_CHECK_IF_DL],
[AC_CHECK_HEADER([net/if_dl.h],
[HAVE_IF_DL=yes],
[HAVE_IF_DL=no])
AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
if test "$HAVE_IF_DL" = yes; then
AC_DEFINE([HAVE_IF_DL], [1],
[Define to 1 if net/if_dl.h is available.])
# On these platforms we use libpcap to access network devices.
AC_SEARCH_LIBS([pcap_open_live], [pcap])
fi])
dnl Checks for buggy strtok_r.
dnl
dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
dnl with optimization that can cause segfaults:
dnl
dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
AC_DEFUN([OVS_CHECK_STRTOK_R],
[AC_CACHE_CHECK(
[whether strtok_r macro segfaults on some inputs],
[ovs_cv_strtok_r_bug],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM([#include <stdio.h>
#include <string.h>
],
[[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
/* Assume bug is present, because relatively minor
changes in compiler settings (e.g. optimization
level) can make it crop up. */
return 1;
#else
char string[] = ":::";
char *save_ptr = (char *) 0xc0ffee;
char *token1, *token2;
token1 = strtok_r(string, ":", &save_ptr);
token2 = strtok_r(NULL, ":", &save_ptr);
freopen ("/dev/null", "w", stdout);
printf ("%s %s\n", token1, token2);
return 0;
#endif
]])],
[ovs_cv_strtok_r_bug=no],
[ovs_cv_strtok_r_bug=yes],
[ovs_cv_strtok_r_bug=yes])])
if test $ovs_cv_strtok_r_bug = yes; then
AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
[Define if strtok_r macro segfaults on some inputs])
fi
])
dnl ----------------------------------------------------------------------
dnl These macros are from GNU PSPP, with the following original license:
dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
[ovs_save_CFLAGS="$CFLAGS"
dnl Include -Werror in the compiler options, because without -Werror
dnl clang's GCC-compatible compiler driver does not return a failure
dnl exit status even though it complains about options it does not
dnl understand.
dnl
dnl Also, check stderr as gcc exits with status 0 for options
dnl rejected at getopt level.
dnl % touch /tmp/a.c
dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
dnl gcc: unrecognized option '-Qunused-arguments'
dnl 0
dnl %
dnl
dnl In addition, GCC does not complain about a -Wno-<foo> option that
dnl it does not understand, unless it has another error to report, so
dnl instead of testing for -Wno-<foo>, test for the positive version.
CFLAGS="$CFLAGS $WERROR m4_bpatsubst([$1], [-Wno-], [-W])"
AC_COMPILE_IFELSE(
[AC_LANG_SOURCE([int x;])],
[if test -s conftest.err && grep "unrecognized option" conftest.err
then
ovs_cv_name[]=no
else
ovs_cv_name[]=yes
fi],
[ovs_cv_name[]=no])
CFLAGS="$ovs_save_CFLAGS"])
if test $ovs_cv_name = yes; then
m4_if([$2], [], [:], [$2])
else
m4_if([$3], [], [:], [$3])
fi
])
dnl OVS_CHECK_WERROR
dnl
dnl Check whether the C compiler accepts -Werror.
dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
AC_DEFUN([OVS_CHECK_WERROR],
[WERROR=
_OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
AC_DEFUN([OVS_CHECK_CC_OPTION],
[AC_REQUIRE([OVS_CHECK_WERROR])
_OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
dnl OVS_ENABLE_OPTION([OPTION])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, add it to WARNING_FLAGS.
dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
AC_DEFUN([OVS_ENABLE_OPTION],
[OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
AC_SUBST([WARNING_FLAGS])])
dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, enable the given Automake CONDITIONAL.
dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
[OVS_CHECK_CC_OPTION(
[$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
dnl ----------------------------------------------------------------------
dnl OVS_CHECK_SPARSE_TARGET
dnl
dnl The "cgcc" script from "sparse" isn't very good at detecting the
dnl target for which the code is being built. This helps it out.
AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
[AC_CACHE_CHECK(
[target hint for cgcc],
[ac_cv_sparse_target],
[AS_CASE([`$CC -dumpmachine 2>/dev/null`],
[i?86-* | athlon-*], [ac_cv_sparse_target=x86],
[x86_64-*], [ac_cv_sparse_target=x86_64],
[ac_cv_sparse_target=other])])
AS_CASE([$ac_cv_sparse_target],
[x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
[x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
[SPARSEFLAGS= CGCCFLAGS=])
AC_SUBST([SPARSEFLAGS])
AC_SUBST([CGCCFLAGS])])
dnl OVS_SPARSE_EXTRA_INCLUDES
dnl
dnl The cgcc script from "sparse" does not search gcc's default
dnl search path. Get the default search path from GCC and pass
dnl them to sparse.
AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
AC_SUBST([SPARSE_EXTRA_INCLUDES],
[`$CC -v -E - </dev/null 2>&1 >/dev/null | sed -n -e '/^#include.*search.*starts.*here:/,/^End.*of.*search.*list\./s/^ \(.*\)/-I \1/p' |grep -v /usr/lib | grep -x -v '\-I /usr/include' | tr \\\n ' ' `] ))
dnl OVS_ENABLE_SPARSE
AC_DEFUN([OVS_ENABLE_SPARSE],
[AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
: ${SPARSE=sparse}
AC_SUBST([SPARSE])
AC_CONFIG_COMMANDS_PRE(
[CC='$(if $(C:0=),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) $(SPARSE_WERROR) -I $(ovs_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])
AC_ARG_ENABLE(
[sparse],
[AS_HELP_STRING([--enable-sparse], [Run "sparse" by default])],
[], [enable_sparse=no])
AM_CONDITIONAL([ENABLE_SPARSE_BY_DEFAULT], [test $enable_sparse = yes])])
dnl OVS_CTAGS_IDENTIFIERS
dnl
dnl ctags ignores symbols with extras identifiers. This builds a list of
dnl specially handled identifiers to be ignored.
AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
[`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${OVSDIR}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
dnl OVS_PTHREAD_SET_NAME
dnl
dnl This checks for three known variants of pthreads functions for setting
dnl the name of the current thread:
dnl
dnl glibc: int pthread_setname_np(pthread_t, const char *name);
dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
dnl
dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
dnl provide to it.
dnl
dnl This macro defines:
dnl
dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
[AC_CHECK_FUNCS([pthread_set_name_np])
if test $ac_cv_func_pthread_set_name_np != yes; then
AC_CACHE_CHECK(
[for pthread_setname_np() variant],
[ovs_cv_pthread_setname_np],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <pthread.h>
], [pthread_setname_np(pthread_self(), "name");])],
[ovs_cv_pthread_setname_np=glibc],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <pthread.h>
], [pthread_setname_np(pthread_self(), "%s", "name");])],
[ovs_cv_pthread_setname_np=netbsd],
[ovs_cv_pthread_setname_np=none])])])
case $ovs_cv_pthread_setname_np in # (
glibc)
AC_DEFINE(
[HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
[Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
;; # (
netbsd)
AC_DEFINE(
[HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
[Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
;;
esac
fi])
dnl OVS_CHECK_LINUX_HOST.
dnl
dnl Checks whether we're building for a Linux host, based on the presence of
dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
dnl LINUX based on the result.
AC_DEFUN([OVS_CHECK_LINUX_HOST],
[AC_CACHE_CHECK(
[whether __linux__ is defined],
[ovs_cv_linux],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
[ovs_cv_linux=true],
[ovs_cv_linux=false])])
AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
dnl OVN_CHECK_OVS
dnl
dnl Check for OVS sources
AC_DEFUN([OVN_CHECK_OVS], [
AC_ARG_WITH([ovs-source],
[AS_HELP_STRING([--with-ovs-source=/path/to/ovs/src/dir],
[Specify the OVS src directory])])
AC_ARG_WITH([ovs-build],
[AS_HELP_STRING([--with-ovs-build=/path/to/ovs/build/dir],
[Specify the OVS build directory])])
AC_MSG_CHECKING([for OVS source directory])
if test X"$with_ovs_source" = X; then
with_ovs_source="$srcdir/ovs"
fi
OVSDIR=$(cd "$(eval echo "$with_ovs_source")"; pwd)
if test ! -f "$OVSDIR/vswitchd/bridge.c"; then
AC_MSG_ERROR([$OVSDIR is not an OVS source directory])
fi
AC_MSG_RESULT([$OVSDIR])
AC_SUBST(OVSDIR)
AC_MSG_CHECKING([for OVS build directory])
if test X"$with_ovs_build" != X; then
OVSBUILDDIR=`eval echo "$with_ovs_build"`
case $OVSBUILDDIR in
/*) ;;
*) OVSBUILDDIR=`pwd`/$OVSBUILDDIR ;;
esac
if test ! -f "$OVSBUILDDIR/config.h"; then
AC_MSG_ERROR([$OVSBUILDDIR is not a configured OVS build directory])
fi
elif test -f "$OVSDIR/config.h"; then
# If separate build dir is not specified, use src dir.
OVSBUILDDIR=$OVSDIR
else
AC_MSG_ERROR(m4_normalize([
OVS source dir $OVSDIR is not configured as a build directory
(either run configure there or use --with-ovs-build to point
to the build directory)]))
fi
AC_MSG_RESULT([$OVSBUILDDIR])
AC_SUBST(OVSBUILDDIR)
OVSVERSION=`sed -n 's/^#define PACKAGE_VERSION//p' $OVSBUILDDIR/config.h | tr \\\n ' ' | sed 's/^[ \t]*//;s/[ \t]*$//' | sed 's/\"//g'`
AC_SUBST(OVSVERSION)
AC_MSG_CHECKING([OVS version])
AC_MSG_RESULT([$OVSVERSION])
])
dnl OVN_CHECK_VIF_PLUG_PROVIDER
dnl
dnl Check for external VIF plug provider
AC_DEFUN([OVN_CHECK_VIF_PLUG_PROVIDER], [
AC_ARG_VAR([VIF_PLUG_PROVIDER])
AC_ARG_WITH(
[vif-plug-provider],
[AS_HELP_STRING([--with-vif-plug-provider=/path/to/provider/repository],
[Specify path to a configured and built VIF plug provider repository])],
[if test "$withval" = yes; then
if test -z "$VIF_PLUG_PROVIDER"; then
AC_MSG_ERROR([To build with external VIF plug provider, specify the path to a configured and built plug provider repository --with-vif-plug-provider or in \$VIF_PLUG_PROVIDER]),
fi
VIF_PLUG_PROVIDER="$(realpath $VIF_PLUG_PROVIDER)"
else
VIF_PLUG_PROVIDER="$(realpath $withval)"
fi
_vif_plug_provider_name="$(basename $VIF_PLUG_PROVIDER)"
if test ! -f "$VIF_PLUG_PROVIDER/lib/.libs/lib${_vif_plug_provider_name}.la"; then
AC_MSG_ERROR([$withval is not a configured and built VIF plug provider library repository])
fi
VIF_PLUG_PROVIDER_LDFLAGS="-L$VIF_PLUG_PROVIDER/lib/.libs -l$_vif_plug_provider_name"
],
[VIF_PLUG_PROVIDER=no])
AC_MSG_CHECKING([for VIF plug provider])
AC_MSG_RESULT([$VIF_PLUG_PROVIDER])
AC_SUBST([VIF_PLUG_PROVIDER_LDFLAGS])
AM_CONDITIONAL([HAVE_VIF_PLUG_PROVIDER], [test "$VIF_PLUG_PROVIDER" != no])
if test "$VIF_PLUG_PROVIDER" != no; then
AC_DEFINE([HAVE_VIF_PLUG_PROVIDER], [1],
[Build and link with external VIF plug provider])
fi
])
dnl OVN_ENABLE_VIF_PLUG
dnl
dnl Enable built-in plug providers
AC_DEFUN([OVN_ENABLE_VIF_PLUG], [
AC_ARG_ENABLE(
[vif-plug-providers],
[AS_HELP_STRING([--enable-vif-plug-providers], [Enable building of built-in VIF plug providers])],
[], [enable_vif_plug=no])
AM_CONDITIONAL([ENABLE_VIF_PLUG], [test "$enable_vif_plug" != no])
if test "$enable_vif_plug" != no; then
AC_DEFINE([ENABLE_VIF_PLUG], [1],
[Build built-in VIF plug providers])
fi
])
dnl Append a version suffix.
AC_DEFUN([OVN_CHECK_VERSION_SUFFIX], [
AC_ARG_WITH([version-suffix],
[AS_HELP_STRING([--with-version-suffix=ver_suffix],
[Specify a string that will be appended
to OVN version])])
AC_DEFINE_UNQUOTED([VERSION_SUFFIX], ["$with_version_suffix"],
[Package version suffix])
AC_SUBST([VERSION_SUFFIX], [$with_version_suffix])
])
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