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.])
69 dnl Checks for Netlink support.
70 AC_DEFUN([OVS_CHECK_NETLINK],
71 [AC_CHECK_HEADER([linux/netlink.h],
74 [#include <sys/socket.h>
75 #include <linux/types.h>
77 AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
78 if test "$HAVE_NETLINK" = yes; then
79 AC_DEFINE([HAVE_NETLINK], [1],
80 [Define to 1 if Netlink protocol is available.])
83 dnl Checks for OpenSSL.
84 AC_DEFUN([OVS_CHECK_OPENSSL],
87 [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
88 [case "${enableval}" in
91 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
95 if test "$ssl" != false; then
99 if test "$ssl" = check; then
100 AC_MSG_WARN([Cannot find openssl:
104 OpenFlow connections over SSL will not be supported.
105 (You may use --disable-ssl to suppress this warning.)])
107 AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
112 AC_SUBST([HAVE_OPENSSL])
113 AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
114 if test "$HAVE_OPENSSL" = yes; then
115 AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
118 dnl Checks for libraries needed by lib/socket-util.c.
119 AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
120 [AC_CHECK_LIB([socket], [connect])
121 AC_SEARCH_LIBS([gethostbyname], [resolv])])
123 dnl Checks for the directory in which to store the PKI.
124 AC_DEFUN([OVS_CHECK_PKIDIR],
127 AC_HELP_STRING([--with-pkidir=DIR],
128 [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
130 [PKIDIR='${localstatedir}/lib/openvswitch/pki'])
133 dnl Checks for the directory in which to store pidfiles.
134 AC_DEFUN([OVS_CHECK_RUNDIR],
137 AC_HELP_STRING([--with-rundir=DIR],
138 [directory used for pidfiles
139 [[LOCALSTATEDIR/run/openvswitch]]]),
141 [RUNDIR='${localstatedir}/run/openvswitch'])
144 dnl Checks for the directory in which to store logs.
145 AC_DEFUN([OVS_CHECK_LOGDIR],
148 AC_HELP_STRING([--with-logdir=DIR],
149 [directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
151 [LOGDIR='${localstatedir}/log/${PACKAGE}'])
154 dnl Checks for the directory in which to store the Open vSwitch database.
155 AC_DEFUN([OVS_CHECK_DBDIR],
158 AC_HELP_STRING([--with-dbdir=DIR],
159 [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
161 [DBDIR='${sysconfdir}/${PACKAGE}'])
164 dnl Defines HAVE_BACKTRACE if backtrace() is found.
165 AC_DEFUN([OVS_CHECK_BACKTRACE],
166 [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
167 [AC_DEFINE([HAVE_BACKTRACE], [1],
168 [Define to 1 if you have backtrace(3).])])])
170 dnl Checks for __malloc_hook, etc., supported by glibc.
171 AC_DEFUN([OVS_CHECK_MALLOC_HOOKS],
173 [whether libc supports hooks for malloc and related functions],
174 [ovs_cv_malloc_hooks],
179 [(void) __malloc_hook;
180 (void) __realloc_hook;
181 (void) __free_hook;])],
182 [ovs_cv_malloc_hooks=yes],
183 [ovs_cv_malloc_hooks=no])])
184 if test $ovs_cv_malloc_hooks = yes; then
185 AC_DEFINE([HAVE_MALLOC_HOOKS], [1],
186 [Define to 1 if you have __malloc_hook, __realloc_hook, and
187 __free_hook in <malloc.h>.])
190 dnl Checks for valgrind/valgrind.h.
191 AC_DEFUN([OVS_CHECK_VALGRIND],
192 [AC_CHECK_HEADERS([valgrind/valgrind.h])])
194 dnl Checks for Python 2.x, x >= 4.
195 AC_DEFUN([OVS_CHECK_PYTHON],
197 [for Python 2.x for x >= 4],
199 [if test -n "$PYTHON"; then
200 ovs_cv_python=$PYTHON
203 for binary in python python2.4 python2.5; do
204 ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
207 test -z "$dir" && dir=.
208 if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
209 if sys.hexversion >= 0x02040000 and sys.hexversion < 0x03000000:
213 ovs_cv_python=$dir/$binary
219 AC_SUBST([HAVE_PYTHON])
220 AM_MISSING_PROG([PYTHON], [python])
221 if test $ovs_cv_python != no; then
222 PYTHON=$ovs_cv_python
227 AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
230 AC_DEFUN([OVS_CHECK_DOT],
234 [dnl "dot" writes -V output to stderr:
235 if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
240 AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
242 dnl Checks whether $PYTHON supports the module given as $1
243 AC_DEFUN([OVS_CHECK_PYTHON_MODULE],
244 [AC_REQUIRE([OVS_CHECK_PYTHON])
246 [for $1 Python module],
247 [ovs_cv_py_[]AS_TR_SH([$1])],
248 [ovs_cv_py_[]AS_TR_SH([$1])=no
249 if test $HAVE_PYTHON = yes; then
250 AS_ECHO(["running $PYTHON -c 'import $1
252 sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1
253 if $PYTHON -c 'import $1
255 sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then
256 ovs_cv_py_[]AS_TR_SH([$1])=yes
260 dnl Checks for missing python modules at build time
261 AC_DEFUN([OVS_CHECK_PYTHON_COMPAT],
262 [OVS_CHECK_PYTHON_MODULE([uuid])
263 if test $ovs_cv_py_uuid = yes; then
264 INCLUDE_PYTHON_COMPAT=no
266 INCLUDE_PYTHON_COMPAT=yes
268 AC_MSG_CHECKING([whether to add python/compat to PYTHONPATH])
269 AC_MSG_RESULT([$INCLUDE_PYTHON_COMPAT])
270 AM_CONDITIONAL([INCLUDE_PYTHON_COMPAT], [test $INCLUDE_PYTHON_COMPAT = yes])])
272 dnl Checks for groff.
273 AC_DEFUN([OVS_CHECK_GROFF],
277 [if (groff -v) >/dev/null 2>&1; then
282 AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
284 dnl Checks for thread-local storage support.
286 dnl Checks whether the compiler and linker support the C11
287 dnl thread_local macro from <threads.h>, and if so defines
288 dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
289 dnl support the GCC __thread extension, and if so defines
291 AC_DEFUN([OVS_CHECK_TLS],
293 [whether $CC has <threads.h> that supports thread_local],
294 [ovs_cv_thread_local],
296 [AC_LANG_PROGRAM([#include <threads.h>
297 static thread_local int var;], [return var;])],
298 [ovs_cv_thread_local=yes],
299 [ovs_cv_thread_local=no])])
300 if test $ovs_cv_thread_local = yes; then
301 AC_DEFINE([HAVE_THREAD_LOCAL], [1],
302 [Define to 1 if the C compiler and linker supports the C11
303 thread_local matcro defined in <threads.h>.])
306 [whether $CC supports __thread],
309 [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
310 [ovs_cv___thread=yes],
311 [ovs_cv___thread=no])])
312 if test $ovs_cv___thread = yes; then
313 AC_DEFINE([HAVE___THREAD], [1],
314 [Define to 1 if the C compiler and linker supports the
315 GCC __thread extenions.])
319 dnl OVS_CHECK_ATOMIC_LIBS
321 dnl Check to see if -latomic is need for GCC atomic built-ins.
322 AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
323 [AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
325 dnl OVS_CHECK_GCC4_ATOMICS
327 dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
328 dnl A compile-time only check is not enough because the compiler defers
329 dnl unimplemented built-ins to libgcc, which sometimes also lacks
331 AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
333 [whether $CC supports GCC 4.0+ atomic built-ins],
334 [ovs_cv_gcc4_atomics],
336 [AC_LANG_PROGRAM([[#include <stdlib.h>
338 #define ovs_assert(expr) if (!(expr)) abort();
339 #define TEST_ATOMIC_TYPE(TYPE) \
344 __sync_synchronize(); \
345 ovs_assert(x == 1); \
347 __sync_synchronize(); \
349 __sync_synchronize(); \
350 ovs_assert(x == 3); \
352 orig = __sync_fetch_and_add(&x, 1); \
353 ovs_assert(orig == 3); \
354 __sync_synchronize(); \
355 ovs_assert(x == 4); \
357 orig = __sync_fetch_and_sub(&x, 2); \
358 ovs_assert(orig == 4); \
359 __sync_synchronize(); \
360 ovs_assert(x == 2); \
362 orig = __sync_fetch_and_or(&x, 6); \
363 ovs_assert(orig == 2); \
364 __sync_synchronize(); \
365 ovs_assert(x == 6); \
367 orig = __sync_fetch_and_and(&x, 10); \
368 ovs_assert(orig == 6); \
369 __sync_synchronize(); \
370 ovs_assert(x == 2); \
372 orig = __sync_fetch_and_xor(&x, 10); \
373 ovs_assert(orig == 2); \
374 __sync_synchronize(); \
375 ovs_assert(x == 8); \
377 TEST_ATOMIC_TYPE(char);
378 TEST_ATOMIC_TYPE(unsigned char);
379 TEST_ATOMIC_TYPE(signed char);
380 TEST_ATOMIC_TYPE(short);
381 TEST_ATOMIC_TYPE(unsigned short);
382 TEST_ATOMIC_TYPE(int);
383 TEST_ATOMIC_TYPE(unsigned int);
384 TEST_ATOMIC_TYPE(long int);
385 TEST_ATOMIC_TYPE(unsigned long int);
386 TEST_ATOMIC_TYPE(long long int);
387 TEST_ATOMIC_TYPE(unsigned long long int);
389 [ovs_cv_gcc4_atomics=yes],
390 [ovs_cv_gcc4_atomics=no])])
391 if test $ovs_cv_gcc4_atomics = yes; then
392 AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
393 [Define to 1 if the C compiler and linker supports the GCC 4.0+
397 dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
399 dnl Checks __atomic_always_lock_free(SIZE, 0)
400 AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
402 [value of __atomic_always_lock_free($1)],
403 [ovs_cv_atomic_always_lock_free_$1],
405 [ovs_cv_atomic_always_lock_free_$1],
406 [__atomic_always_lock_free($1, 0)],
408 [ovs_cv_atomic_always_lock_free_$1=unsupported])])
409 if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
411 [ATOMIC_ALWAYS_LOCK_FREE_$1B],
412 [$ovs_cv_atomic_always_lock_free_$1],
413 [If the C compiler is GCC 4.7 or later, define to the return value of
414 __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
415 an older version of GCC, the value does not matter.])
418 dnl OVS_CHECK_POSIX_AIO
419 AC_DEFUN([OVS_CHECK_POSIX_AIO],
420 [AC_SEARCH_LIBS([aio_write], [rt])
421 AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
423 dnl OVS_CHECK_INCLUDE_NEXT
424 AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
425 [AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
426 gl_CHECK_NEXT_HEADERS([$1])])