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ovs/configure.ac
Scott Mann 7f2f24e379 Build: Add support for shared libraries and versioning. 
These changes allow for the building of shared libraries by providing
the --enable-shared option to configure. In particular, lib/libopenvwitch.so,
lib/libsflow.so, ofproto/libofproto.so, and ovsdb/libovsdb.so will be built.
Original behavior of building static remains the same.

Additionally, versioning is introduced to each of the libraries objects
paving the way for APIs to be built around them. A detailed comment
outlining the rules for changing a version number is provided in
configure.ac. Note that at this time, the version number is set to
1.0.0, no API is specified yet, and there are no requirements to
maintain any sort of compatibility in any of the libraries.

Signed-off-by: Scott Mann <smann@noironetworks.com>
Signed-off-by: Ben Pfaff <blp@nicira.com>
2014-11-11 22:08:41 -08:00

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# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 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.
AC_PREREQ(2.63)
AC_INIT(openvswitch, 2.3.90, bugs@openvswitch.org)
AC_CONFIG_SRCDIR([datapath/datapath.c])
AC_CONFIG_MACRO_DIR([m4])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_TESTDIR([tests])
AM_INIT_AUTOMAKE
AC_PROG_CC_C99
AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_MKDIR_P
AC_PROG_FGREP
AC_PROG_EGREP
AC_ARG_VAR([PERL], [path to Perl interpreter])
AC_PATH_PROG([PERL], perl, no)
if test "$PERL" = no; then
AC_MSG_ERROR([Perl interpreter not found in $PATH or $PERL.])
fi
AM_MISSING_PROG([AUTOM4TE], [autom4te])
AC_USE_SYSTEM_EXTENSIONS
AC_C_BIGENDIAN
AC_SYS_LARGEFILE
LT_INIT([disable-shared])
m4_pattern_forbid([LT_INIT]) dnl Make autoconf fail if libtool is missing.
# The following explanation may help to understand the use of the
# version number fields: current, revision, and age.
#
# Consider that there are three possible kinds of reactions from
# users of your library to changes in a shared library:
#
# 1. Programs using the previous version may use the new version as drop-in
# replacement, and programs using the new version can also work with the
# previous one. In other words, no recompiling nor relinking is needed.
# In short, there are no changes to any symbols, no symbols removed,
# and no symbols added. In this case, bump revision only, don't touch
# current nor age.
#
# 2. Programs using the previous version may use the new version as drop-in
# replacement, but programs using the new version may use APIs not
# present in the previous one. In other words, new symbols have been
# added and a program linking against the new version may fail with
# “unresolved symbols.” If linking against the old version at runtime:
# set revision to 0, bump current and age.
#
# 3. Programs may need to be changed, recompiled, relinked in order to use
# the new version. This is the case when symbols have been modified or
# deleted. Bump current, set revision and age to 0.
m4_define([libopenvswitch_lt_current], [1])
m4_define([libopenvswitch_lt_revision], [0])
m4_define([libopenvswitch_lt_age], [0])
LT_CURRENT=libopenvswitch_lt_current
AC_SUBST([LT_CURRENT])
LT_REVISION=libopenvswitch_lt_revision
AC_SUBST([LT_REVISION])
LT_AGE=libopenvswitch_lt_age
AC_SUBST([LT_AGE])
AC_SEARCH_LIBS([pow], [m])
AC_SEARCH_LIBS([clock_gettime], [rt])
AC_SEARCH_LIBS([timer_create], [rt])
AC_SEARCH_LIBS([pthread_sigmask], [pthread])
AC_FUNC_STRERROR_R
OVS_CHECK_ESX
OVS_CHECK_WIN32
OVS_CHECK_VISUAL_STUDIO_DDK
OVS_CHECK_COVERAGE
OVS_CHECK_NDEBUG
OVS_CHECK_NETLINK
OVS_CHECK_OPENSSL
OVS_CHECK_LOGDIR
OVS_CHECK_PYTHON
OVS_CHECK_PYTHON_COMPAT
OVS_CHECK_DOT
OVS_CHECK_IF_PACKET
OVS_CHECK_IF_DL
OVS_CHECK_STRTOK_R
AC_CHECK_DECLS([sys_siglist], [], [], [[#include <signal.h>]])
AC_CHECK_MEMBERS([struct stat.st_mtim.tv_nsec, struct stat.st_mtimensec],
[], [], [[#include <sys/stat.h>]])
AC_CHECK_MEMBERS([struct ifreq.ifr_flagshigh], [], [], [[#include <net/if.h>]])
AC_CHECK_FUNCS([mlockall strnlen getloadavg statvfs getmntent_r])
AC_CHECK_HEADERS([mntent.h sys/statvfs.h linux/types.h linux/if_ether.h stdatomic.h])
AC_CHECK_HEADERS([net/if_mib.h], [], [], [[#include <sys/types.h>
#include <net/if.h>]])
OVS_CHECK_PKIDIR
OVS_CHECK_RUNDIR
OVS_CHECK_DBDIR
OVS_CHECK_BACKTRACE
OVS_CHECK_VALGRIND
OVS_CHECK_SOCKET_LIBS
OVS_CHECK_XENSERVER_VERSION
OVS_CHECK_GROFF
OVS_CHECK_GNU_MAKE
OVS_CHECK_TLS
OVS_CHECK_ATOMIC_LIBS
OVS_CHECK_GCC4_ATOMICS
OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(1)
OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(2)
OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(4)
OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(8)
OVS_CHECK_POSIX_AIO
OVS_CHECK_PTHREAD_SET_NAME
OVS_CHECK_LINUX_HOST
AX_FUNC_POSIX_MEMALIGN
OVS_CHECK_INCLUDE_NEXT([stdio.h string.h])
AC_CONFIG_FILES([
lib/stdio.h
lib/string.h
ovsdb/libovsdb.sym
ofproto/libofproto.sym
lib/libsflow.sym
lib/libopenvswitch.sym])
OVS_ENABLE_OPTION([-Wall])
OVS_ENABLE_OPTION([-Wextra])
OVS_ENABLE_OPTION([-Wno-sign-compare])
OVS_ENABLE_OPTION([-Wpointer-arith])
OVS_ENABLE_OPTION([-Wformat-security])
OVS_ENABLE_OPTION([-Wno-format-zero-length])
OVS_ENABLE_OPTION([-Wswitch-enum])
OVS_ENABLE_OPTION([-Wunused-parameter])
OVS_ENABLE_OPTION([-Wbad-function-cast])
OVS_ENABLE_OPTION([-Wcast-align])
OVS_ENABLE_OPTION([-Wstrict-prototypes])
OVS_ENABLE_OPTION([-Wold-style-definition])
OVS_ENABLE_OPTION([-Wmissing-prototypes])
OVS_ENABLE_OPTION([-Wmissing-field-initializers])
OVS_ENABLE_OPTION([-Wthread-safety])
OVS_ENABLE_OPTION([-fno-strict-aliasing])
OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
OVS_CONDITIONAL_CC_OPTION([-Wno-unused-parameter], [HAVE_WNO_UNUSED_PARAMETER])
OVS_ENABLE_WERROR
OVS_ENABLE_SPARSE
AC_ARG_VAR(KARCH, [Kernel Architecture String])
AC_SUBST(KARCH)
OVS_CHECK_LINUX
OVS_CHECK_DPDK
OVS_CHECK_PRAGMA_MESSAGE
AC_SUBST([OVS_CFLAGS])
AC_SUBST([OVS_LDFLAGS])
AC_CONFIG_FILES(Makefile)
AC_CONFIG_FILES(datapath/Makefile)
AC_CONFIG_FILES(datapath/linux/Kbuild)
AC_CONFIG_FILES(datapath/linux/Makefile)
AC_CONFIG_FILES(datapath/linux/Makefile.main)
AC_CONFIG_FILES(tests/atlocal)
dnl This makes sure that include/openflow gets created in the build directory.
AC_CONFIG_COMMANDS([include/openflow/openflow.h.stamp])
AC_CONFIG_COMMANDS([utilities/bugtool/dummy], [:])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES])
AC_OUTPUT
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