3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 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 for pyuic4.
246 AC_DEFUN([OVS_CHECK_PYUIC4],
250 [if (pyuic4 --version) >/dev/null 2>&1; then
255 AM_MISSING_PROG([PYUIC4], [pyuic4])
256 if test $ovs_cv_pyuic4 != no; then
257 PYUIC4=$ovs_cv_pyuic4
260 dnl Checks whether $PYTHON supports the module given as $1
261 AC_DEFUN([OVS_CHECK_PYTHON_MODULE],
262 [AC_REQUIRE([OVS_CHECK_PYTHON])
264 [for $1 Python module],
265 [ovs_cv_py_[]AS_TR_SH([$1])],
266 [ovs_cv_py_[]AS_TR_SH([$1])=no
267 if test $HAVE_PYTHON = yes; then
268 AS_ECHO(["running $PYTHON -c 'import $1
270 sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1
271 if $PYTHON -c 'import $1
273 sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then
274 ovs_cv_py_[]AS_TR_SH([$1])=yes
278 dnl Checks for Python modules needed by ovsdbmonitor.
279 AC_DEFUN([OVS_CHECK_OVSDBMONITOR],
280 [OVS_CHECK_PYTHON_MODULE([PySide.QtCore])
281 OVS_CHECK_PYTHON_MODULE([PyQt4.QtCore])
282 OVS_CHECK_PYTHON_MODULE([twisted.conch.ssh])
283 OVS_CHECK_PYTHON_MODULE([twisted.internet])
284 OVS_CHECK_PYTHON_MODULE([twisted.application])
285 OVS_CHECK_PYTHON_MODULE([json])
286 OVS_CHECK_PYTHON_MODULE([zope.interface])
287 if (test $ovs_cv_py_PySide_QtCore = yes \
288 || test $ovs_cv_py_PyQt4_QtCore = yes) \
289 && test $ovs_cv_py_twisted_conch_ssh = yes \
290 && test $ovs_cv_py_twisted_internet = yes \
291 && test $ovs_cv_py_twisted_application = yes \
292 && test $ovs_cv_py_json = yes \
293 && test $ovs_cv_py_zope_interface = yes; then
294 BUILD_OVSDBMONITOR=yes
296 BUILD_OVSDBMONITOR=no
298 AC_MSG_CHECKING([whether to build ovsdbmonitor])
299 AC_MSG_RESULT([$BUILD_OVSDBMONITOR])
300 AM_CONDITIONAL([BUILD_OVSDBMONITOR], [test $BUILD_OVSDBMONITOR = yes])])
302 dnl Checks for missing python modules at build time
303 AC_DEFUN([OVS_CHECK_PYTHON_COMPAT],
304 [OVS_CHECK_PYTHON_MODULE([uuid])
305 if test $ovs_cv_py_uuid = yes; then
306 INCLUDE_PYTHON_COMPAT=no
308 INCLUDE_PYTHON_COMPAT=yes
310 AC_MSG_CHECKING([whether to add python/compat to PYTHONPATH])
311 AC_MSG_RESULT([$INCLUDE_PYTHON_COMPAT])
312 AM_CONDITIONAL([INCLUDE_PYTHON_COMPAT], [test $INCLUDE_PYTHON_COMPAT = yes])])
314 dnl Checks for groff.
315 AC_DEFUN([OVS_CHECK_GROFF],
319 [if (groff -v) >/dev/null 2>&1; then
324 AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
326 dnl Checks for thread-local storage support.
328 dnl Checks whether the compiler and linker support the C11
329 dnl thread_local macro from <threads.h>, and if so defines
330 dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
331 dnl support the GCC __thread extension, and if so defines
333 AC_DEFUN([OVS_CHECK_TLS],
335 [whether $CC has <threads.h> that supports thread_local],
336 [ovs_cv_thread_local],
338 [AC_LANG_PROGRAM([#include <threads.h>
339 static thread_local int var;], [return var;])],
340 [ovs_cv_thread_local=yes],
341 [ovs_cv_thread_local=no])])
342 if test $ovs_cv_thread_local = yes; then
343 AC_DEFINE([HAVE_THREAD_LOCAL], [1],
344 [Define to 1 if the C compiler and linker supports the C11
345 thread_local matcro defined in <threads.h>.])
348 [whether $CC supports __thread],
351 [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
352 [ovs_cv___thread=yes],
353 [ovs_cv___thread=no])])
354 if test $ovs_cv___thread = yes; then
355 AC_DEFINE([HAVE___THREAD], [1],
356 [Define to 1 if the C compiler and linker supports the
357 GCC __thread extenions.])
361 dnl OVS_CHECK_ATOMIC_LIBS
363 dnl Check to see if -latomic is need for GCC atomic built-ins.
364 AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
365 [AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
367 dnl OVS_CHECK_GCC4_ATOMICS
369 dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
370 dnl A compile-time only check is not enough because the compiler defers
371 dnl unimplemented built-ins to libgcc, which sometimes also lacks
373 AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
375 [whether $CC supports GCC 4.0+ atomic built-ins],
376 [ovs_cv_gcc4_atomics],
378 [AC_LANG_PROGRAM([[#include <stdlib.h>
380 #define ovs_assert(expr) if (!(expr)) abort();
381 #define TEST_ATOMIC_TYPE(TYPE) \
386 __sync_synchronize(); \
387 ovs_assert(x == 1); \
389 __sync_synchronize(); \
391 __sync_synchronize(); \
392 ovs_assert(x == 3); \
394 orig = __sync_fetch_and_add(&x, 1); \
395 ovs_assert(orig == 3); \
396 __sync_synchronize(); \
397 ovs_assert(x == 4); \
399 orig = __sync_fetch_and_sub(&x, 2); \
400 ovs_assert(orig == 4); \
401 __sync_synchronize(); \
402 ovs_assert(x == 2); \
404 orig = __sync_fetch_and_or(&x, 6); \
405 ovs_assert(orig == 2); \
406 __sync_synchronize(); \
407 ovs_assert(x == 6); \
409 orig = __sync_fetch_and_and(&x, 10); \
410 ovs_assert(orig == 6); \
411 __sync_synchronize(); \
412 ovs_assert(x == 2); \
414 orig = __sync_fetch_and_xor(&x, 10); \
415 ovs_assert(orig == 2); \
416 __sync_synchronize(); \
417 ovs_assert(x == 8); \
419 TEST_ATOMIC_TYPE(char);
420 TEST_ATOMIC_TYPE(unsigned char);
421 TEST_ATOMIC_TYPE(signed char);
422 TEST_ATOMIC_TYPE(short);
423 TEST_ATOMIC_TYPE(unsigned short);
424 TEST_ATOMIC_TYPE(int);
425 TEST_ATOMIC_TYPE(unsigned int);
426 TEST_ATOMIC_TYPE(long int);
427 TEST_ATOMIC_TYPE(unsigned long int);
428 TEST_ATOMIC_TYPE(long long int);
429 TEST_ATOMIC_TYPE(unsigned long long int);
431 [ovs_cv_gcc4_atomics=yes],
432 [ovs_cv_gcc4_atomics=no])])
433 if test $ovs_cv_gcc4_atomics = yes; then
434 AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
435 [Define to 1 if the C compiler and linker supports the GCC 4.0+
439 dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
441 dnl Checks __atomic_always_lock_free(SIZE, 0)
442 AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
444 [value of __atomic_always_lock_free($1)],
445 [ovs_cv_atomic_always_lock_free_$1],
447 [ovs_cv_atomic_always_lock_free_$1],
448 [__atomic_always_lock_free($1, 0)],
450 [ovs_cv_atomic_always_lock_free_$1=unsupported])])
451 if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
453 [ATOMIC_ALWAYS_LOCK_FREE_$1B],
454 [$ovs_cv_atomic_always_lock_free_$1],
455 [If the C compiler is GCC 4.7 or later, define to the return value of
456 __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
457 an older version of GCC, the value does not matter.])
460 dnl OVS_CHECK_POSIX_AIO
461 AC_DEFUN([OVS_CHECK_POSIX_AIO],
462 [AC_SEARCH_LIBS([aio_write], [rt])
463 AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
465 dnl OVS_CHECK_INCLUDE_NEXT
466 AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
467 [AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
468 gl_CHECK_NEXT_HEADERS([$1])])