3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at:
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 dnl Checks for --enable-coverage and updates CFLAGS and LDFLAGS appropriately.
18 AC_DEFUN([OVS_CHECK_COVERAGE],
19 [AC_REQUIRE([AC_PROG_CC])
22 [AC_HELP_STRING([--enable-coverage],
23 [Enable gcov coverage tool.])],
24 [case "${enableval}" in
25 (yes) coverage=true ;;
26 (no) coverage=false ;;
27 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-coverage]) ;;
31 CFLAGS="$CFLAGS -O0 --coverage"
32 LDFLAGS="$LDFLAGS --coverage"
35 dnl Checks for --enable-ndebug and defines NDEBUG if it is specified.
36 AC_DEFUN([OVS_CHECK_NDEBUG],
39 [AC_HELP_STRING([--enable-ndebug],
40 [Disable debugging features for max performance])],
41 [case "${enableval}" in
44 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ndebug]) ;;
47 AM_CONDITIONAL([NDEBUG], [test x$ndebug = xtrue])])
50 AC_DEFUN([OVS_CHECK_ESX],
51 [AC_CHECK_HEADER([vmware.h],
54 AM_CONDITIONAL([ESX], [test "$ESX" = yes])
55 if test "$ESX" = yes; then
56 AC_DEFINE([ESX], [1], [Define to 1 if building on ESX.])
59 dnl Checks for WINDOWS.
60 AC_DEFUN([OVS_CHECK_WIN32],
61 [AC_CHECK_HEADER([windows.h],
64 AM_CONDITIONAL([WIN32], [test "$WIN32" = yes])
65 if test "$WIN32" = yes; then
66 AC_DEFINE([WIN32], [1], [Define to 1 if building on WIN32.])
67 AH_BOTTOM([#ifdef WIN32
68 #include "include/windows/windefs.h"
72 dnl Checks for Netlink support.
73 AC_DEFUN([OVS_CHECK_NETLINK],
74 [AC_CHECK_HEADER([linux/netlink.h],
77 [#include <sys/socket.h>
78 #include <linux/types.h>
80 AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
81 if test "$HAVE_NETLINK" = yes; then
82 AC_DEFINE([HAVE_NETLINK], [1],
83 [Define to 1 if Netlink protocol is available.])
86 dnl Checks for OpenSSL.
87 AC_DEFUN([OVS_CHECK_OPENSSL],
90 [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
91 [case "${enableval}" in
94 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
98 if test "$ssl" != false; then
102 if test "$ssl" = check; then
103 AC_MSG_WARN([Cannot find openssl:
107 OpenFlow connections over SSL will not be supported.
108 (You may use --disable-ssl to suppress this warning.)])
110 AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
115 AC_SUBST([HAVE_OPENSSL])
116 AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
117 if test "$HAVE_OPENSSL" = yes; then
118 AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
121 dnl Checks for libraries needed by lib/socket-util.c.
122 AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
123 [AC_CHECK_LIB([socket], [connect])
124 AC_SEARCH_LIBS([gethostbyname], [resolv])])
126 dnl Checks for the directory in which to store the PKI.
127 AC_DEFUN([OVS_CHECK_PKIDIR],
130 AC_HELP_STRING([--with-pkidir=DIR],
131 [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
133 [PKIDIR='${localstatedir}/lib/openvswitch/pki'])
136 dnl Checks for the directory in which to store pidfiles.
137 AC_DEFUN([OVS_CHECK_RUNDIR],
140 AC_HELP_STRING([--with-rundir=DIR],
141 [directory used for pidfiles
142 [[LOCALSTATEDIR/run/openvswitch]]]),
144 [RUNDIR='${localstatedir}/run/openvswitch'])
147 dnl Checks for the directory in which to store logs.
148 AC_DEFUN([OVS_CHECK_LOGDIR],
151 AC_HELP_STRING([--with-logdir=DIR],
152 [directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
154 [LOGDIR='${localstatedir}/log/${PACKAGE}'])
157 dnl Checks for the directory in which to store the Open vSwitch database.
158 AC_DEFUN([OVS_CHECK_DBDIR],
161 AC_HELP_STRING([--with-dbdir=DIR],
162 [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
164 [DBDIR='${sysconfdir}/${PACKAGE}'])
167 dnl Defines HAVE_BACKTRACE if backtrace() is found.
168 AC_DEFUN([OVS_CHECK_BACKTRACE],
169 [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
170 [AC_DEFINE([HAVE_BACKTRACE], [1],
171 [Define to 1 if you have backtrace(3).])])])
173 dnl Checks for __malloc_hook, etc., supported by glibc.
174 AC_DEFUN([OVS_CHECK_MALLOC_HOOKS],
176 [whether libc supports hooks for malloc and related functions],
177 [ovs_cv_malloc_hooks],
182 [(void) __malloc_hook;
183 (void) __realloc_hook;
184 (void) __free_hook;])],
185 [ovs_cv_malloc_hooks=yes],
186 [ovs_cv_malloc_hooks=no])])
187 if test $ovs_cv_malloc_hooks = yes; then
188 AC_DEFINE([HAVE_MALLOC_HOOKS], [1],
189 [Define to 1 if you have __malloc_hook, __realloc_hook, and
190 __free_hook in <malloc.h>.])
193 dnl Checks for valgrind/valgrind.h.
194 AC_DEFUN([OVS_CHECK_VALGRIND],
195 [AC_CHECK_HEADERS([valgrind/valgrind.h])])
197 dnl Checks for Python 2.x, x >= 4.
198 AC_DEFUN([OVS_CHECK_PYTHON],
200 [for Python 2.x for x >= 4],
202 [if test -n "$PYTHON"; then
203 ovs_cv_python=$PYTHON
206 for binary in python python2.4 python2.5; do
207 ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
210 test -z "$dir" && dir=.
211 if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
212 if sys.hexversion >= 0x02040000 and sys.hexversion < 0x03000000:
216 ovs_cv_python=$dir/$binary
222 AC_SUBST([HAVE_PYTHON])
223 AM_MISSING_PROG([PYTHON], [python])
224 if test $ovs_cv_python != no; then
225 PYTHON=$ovs_cv_python
230 AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
233 AC_DEFUN([OVS_CHECK_DOT],
237 [dnl "dot" writes -V output to stderr:
238 if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
243 AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
245 dnl Checks whether $PYTHON supports the module given as $1
246 AC_DEFUN([OVS_CHECK_PYTHON_MODULE],
247 [AC_REQUIRE([OVS_CHECK_PYTHON])
249 [for $1 Python module],
250 [ovs_cv_py_[]AS_TR_SH([$1])],
251 [ovs_cv_py_[]AS_TR_SH([$1])=no
252 if test $HAVE_PYTHON = yes; then
253 AS_ECHO(["running $PYTHON -c 'import $1
255 sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1
256 if $PYTHON -c 'import $1
258 sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then
259 ovs_cv_py_[]AS_TR_SH([$1])=yes
263 dnl Checks for missing python modules at build time
264 AC_DEFUN([OVS_CHECK_PYTHON_COMPAT],
265 [OVS_CHECK_PYTHON_MODULE([uuid])
266 if test $ovs_cv_py_uuid = yes; then
267 INCLUDE_PYTHON_COMPAT=no
269 INCLUDE_PYTHON_COMPAT=yes
271 AC_MSG_CHECKING([whether to add python/compat to PYTHONPATH])
272 AC_MSG_RESULT([$INCLUDE_PYTHON_COMPAT])
273 AM_CONDITIONAL([INCLUDE_PYTHON_COMPAT], [test $INCLUDE_PYTHON_COMPAT = yes])])
275 dnl Checks for groff.
276 AC_DEFUN([OVS_CHECK_GROFF],
280 [if (groff -v) >/dev/null 2>&1; then
285 AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
287 dnl Checks for thread-local storage support.
289 dnl Checks whether the compiler and linker support the C11
290 dnl thread_local macro from <threads.h>, and if so defines
291 dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
292 dnl support the GCC __thread extension, and if so defines
294 AC_DEFUN([OVS_CHECK_TLS],
296 [whether $CC has <threads.h> that supports thread_local],
297 [ovs_cv_thread_local],
299 [AC_LANG_PROGRAM([#include <threads.h>
300 static thread_local int var;], [return var;])],
301 [ovs_cv_thread_local=yes],
302 [ovs_cv_thread_local=no])])
303 if test $ovs_cv_thread_local = yes; then
304 AC_DEFINE([HAVE_THREAD_LOCAL], [1],
305 [Define to 1 if the C compiler and linker supports the C11
306 thread_local matcro defined in <threads.h>.])
309 [whether $CC supports __thread],
312 [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
313 [ovs_cv___thread=yes],
314 [ovs_cv___thread=no])])
315 if test $ovs_cv___thread = yes; then
316 AC_DEFINE([HAVE___THREAD], [1],
317 [Define to 1 if the C compiler and linker supports the
318 GCC __thread extenions.])
322 dnl OVS_CHECK_ATOMIC_LIBS
324 dnl Check to see if -latomic is need for GCC atomic built-ins.
325 AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
326 [AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
328 dnl OVS_CHECK_GCC4_ATOMICS
330 dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
331 dnl A compile-time only check is not enough because the compiler defers
332 dnl unimplemented built-ins to libgcc, which sometimes also lacks
334 AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
336 [whether $CC supports GCC 4.0+ atomic built-ins],
337 [ovs_cv_gcc4_atomics],
339 [AC_LANG_PROGRAM([[#include <stdlib.h>
341 #define ovs_assert(expr) if (!(expr)) abort();
342 #define TEST_ATOMIC_TYPE(TYPE) \
347 __sync_synchronize(); \
348 ovs_assert(x == 1); \
350 __sync_synchronize(); \
352 __sync_synchronize(); \
353 ovs_assert(x == 3); \
355 orig = __sync_fetch_and_add(&x, 1); \
356 ovs_assert(orig == 3); \
357 __sync_synchronize(); \
358 ovs_assert(x == 4); \
360 orig = __sync_fetch_and_sub(&x, 2); \
361 ovs_assert(orig == 4); \
362 __sync_synchronize(); \
363 ovs_assert(x == 2); \
365 orig = __sync_fetch_and_or(&x, 6); \
366 ovs_assert(orig == 2); \
367 __sync_synchronize(); \
368 ovs_assert(x == 6); \
370 orig = __sync_fetch_and_and(&x, 10); \
371 ovs_assert(orig == 6); \
372 __sync_synchronize(); \
373 ovs_assert(x == 2); \
375 orig = __sync_fetch_and_xor(&x, 10); \
376 ovs_assert(orig == 2); \
377 __sync_synchronize(); \
378 ovs_assert(x == 8); \
380 TEST_ATOMIC_TYPE(char);
381 TEST_ATOMIC_TYPE(unsigned char);
382 TEST_ATOMIC_TYPE(signed char);
383 TEST_ATOMIC_TYPE(short);
384 TEST_ATOMIC_TYPE(unsigned short);
385 TEST_ATOMIC_TYPE(int);
386 TEST_ATOMIC_TYPE(unsigned int);
387 TEST_ATOMIC_TYPE(long int);
388 TEST_ATOMIC_TYPE(unsigned long int);
389 TEST_ATOMIC_TYPE(long long int);
390 TEST_ATOMIC_TYPE(unsigned long long int);
392 [ovs_cv_gcc4_atomics=yes],
393 [ovs_cv_gcc4_atomics=no])])
394 if test $ovs_cv_gcc4_atomics = yes; then
395 AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
396 [Define to 1 if the C compiler and linker supports the GCC 4.0+
400 dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
402 dnl Checks __atomic_always_lock_free(SIZE, 0)
403 AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
405 [value of __atomic_always_lock_free($1)],
406 [ovs_cv_atomic_always_lock_free_$1],
408 [ovs_cv_atomic_always_lock_free_$1],
409 [__atomic_always_lock_free($1, 0)],
411 [ovs_cv_atomic_always_lock_free_$1=unsupported])])
412 if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
414 [ATOMIC_ALWAYS_LOCK_FREE_$1B],
415 [$ovs_cv_atomic_always_lock_free_$1],
416 [If the C compiler is GCC 4.7 or later, define to the return value of
417 __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
418 an older version of GCC, the value does not matter.])
421 dnl OVS_CHECK_POSIX_AIO
422 AC_DEFUN([OVS_CHECK_POSIX_AIO],
423 [AC_SEARCH_LIBS([aio_write], [rt])
424 AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
426 dnl OVS_CHECK_INCLUDE_NEXT
427 AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
428 [AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
429 gl_CHECK_NEXT_HEADERS([$1])])