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_ARG_WITH([pthread],
67 [AS_HELP_STRING([--with-pthread=DIR],
68 [root of the pthread-win32 directory])],
71 "" | y | ye | yes | n | no)
72 AC_MSG_ERROR([Invalid --with-pthread value])
75 PTHREAD_INCLUDES="-I$withval/include"
76 PTHREAD_LDFLAGS="-L$withval/lib/x86"
77 PTHREAD_LIBS="-lpthreadVC2"
78 AC_SUBST([PTHREAD_INCLUDES])
79 AC_SUBST([PTHREAD_LDFLAGS])
80 AC_SUBST([PTHREAD_LIBS])
84 AC_MSG_ERROR([pthread directory not specified])
87 AC_DEFINE([WIN32], [1], [Define to 1 if building on WIN32.])
88 AH_BOTTOM([#ifdef WIN32
89 #include "include/windows/windefs.h"
93 dnl Checks for Netlink support.
94 AC_DEFUN([OVS_CHECK_NETLINK],
95 [AC_CHECK_HEADER([linux/netlink.h],
98 [#include <sys/socket.h>
100 AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
101 if test "$HAVE_NETLINK" = yes; then
102 AC_DEFINE([HAVE_NETLINK], [1],
103 [Define to 1 if Netlink protocol is available.])
106 dnl Checks for OpenSSL.
107 AC_DEFUN([OVS_CHECK_OPENSSL],
110 [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
111 [case "${enableval}" in
114 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
118 if test "$ssl" != false; then
122 if test "$ssl" = check; then
123 AC_MSG_WARN([Cannot find openssl:
127 OpenFlow connections over SSL will not be supported.
128 (You may use --disable-ssl to suppress this warning.)])
130 AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
135 AC_SUBST([HAVE_OPENSSL])
136 AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
137 if test "$HAVE_OPENSSL" = yes; then
138 AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
141 dnl Checks for libraries needed by lib/socket-util.c.
142 AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
143 [AC_CHECK_LIB([socket], [connect])
144 AC_SEARCH_LIBS([gethostbyname], [resolv])])
146 dnl Checks for the directory in which to store the PKI.
147 AC_DEFUN([OVS_CHECK_PKIDIR],
150 AC_HELP_STRING([--with-pkidir=DIR],
151 [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
153 [PKIDIR='${localstatedir}/lib/openvswitch/pki'])
156 dnl Checks for the directory in which to store pidfiles.
157 AC_DEFUN([OVS_CHECK_RUNDIR],
160 AC_HELP_STRING([--with-rundir=DIR],
161 [directory used for pidfiles
162 [[LOCALSTATEDIR/run/openvswitch]]]),
164 [RUNDIR='${localstatedir}/run/openvswitch'])
167 dnl Checks for the directory in which to store logs.
168 AC_DEFUN([OVS_CHECK_LOGDIR],
171 AC_HELP_STRING([--with-logdir=DIR],
172 [directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
174 [LOGDIR='${localstatedir}/log/${PACKAGE}'])
177 dnl Checks for the directory in which to store the Open vSwitch database.
178 AC_DEFUN([OVS_CHECK_DBDIR],
181 AC_HELP_STRING([--with-dbdir=DIR],
182 [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
184 [DBDIR='${sysconfdir}/${PACKAGE}'])
187 dnl Defines HAVE_BACKTRACE if backtrace() is found.
188 AC_DEFUN([OVS_CHECK_BACKTRACE],
189 [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
190 [AC_DEFINE([HAVE_BACKTRACE], [1],
191 [Define to 1 if you have backtrace(3).])])])
193 dnl Checks for __malloc_hook, etc., supported by glibc.
194 AC_DEFUN([OVS_CHECK_MALLOC_HOOKS],
196 [whether libc supports hooks for malloc and related functions],
197 [ovs_cv_malloc_hooks],
202 [(void) __malloc_hook;
203 (void) __realloc_hook;
204 (void) __free_hook;])],
205 [ovs_cv_malloc_hooks=yes],
206 [ovs_cv_malloc_hooks=no])])
207 if test $ovs_cv_malloc_hooks = yes; then
208 AC_DEFINE([HAVE_MALLOC_HOOKS], [1],
209 [Define to 1 if you have __malloc_hook, __realloc_hook, and
210 __free_hook in <malloc.h>.])
213 dnl Checks for valgrind/valgrind.h.
214 AC_DEFUN([OVS_CHECK_VALGRIND],
215 [AC_CHECK_HEADERS([valgrind/valgrind.h])])
217 dnl Checks for Python 2.x, x >= 4.
218 AC_DEFUN([OVS_CHECK_PYTHON],
220 [for Python 2.x for x >= 4],
222 [if test -n "$PYTHON"; then
223 ovs_cv_python=$PYTHON
226 for binary in python python2.4 python2.5; do
227 ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
230 test -z "$dir" && dir=.
231 if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
232 if sys.hexversion >= 0x02040000 and sys.hexversion < 0x03000000:
236 ovs_cv_python=$dir/$binary
242 AC_SUBST([HAVE_PYTHON])
243 AM_MISSING_PROG([PYTHON], [python])
244 if test $ovs_cv_python != no; then
245 PYTHON=$ovs_cv_python
250 AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
253 AC_DEFUN([OVS_CHECK_DOT],
257 [dnl "dot" writes -V output to stderr:
258 if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
263 AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
265 dnl Checks whether $PYTHON supports the module given as $1
266 AC_DEFUN([OVS_CHECK_PYTHON_MODULE],
267 [AC_REQUIRE([OVS_CHECK_PYTHON])
269 [for $1 Python module],
270 [ovs_cv_py_[]AS_TR_SH([$1])],
271 [ovs_cv_py_[]AS_TR_SH([$1])=no
272 if test $HAVE_PYTHON = yes; then
273 AS_ECHO(["running $PYTHON -c 'import $1
275 sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1
276 if $PYTHON -c 'import $1
278 sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then
279 ovs_cv_py_[]AS_TR_SH([$1])=yes
283 dnl Checks for missing python modules at build time
284 AC_DEFUN([OVS_CHECK_PYTHON_COMPAT],
285 [OVS_CHECK_PYTHON_MODULE([uuid])
286 if test $ovs_cv_py_uuid = yes; then
287 INCLUDE_PYTHON_COMPAT=no
289 INCLUDE_PYTHON_COMPAT=yes
291 AC_MSG_CHECKING([whether to add python/compat to PYTHONPATH])
292 AC_MSG_RESULT([$INCLUDE_PYTHON_COMPAT])
293 AM_CONDITIONAL([INCLUDE_PYTHON_COMPAT], [test $INCLUDE_PYTHON_COMPAT = yes])])
295 dnl Checks for groff.
296 AC_DEFUN([OVS_CHECK_GROFF],
300 [if (groff -v) >/dev/null 2>&1; then
305 AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
307 dnl Checks for thread-local storage support.
309 dnl Checks whether the compiler and linker support the C11
310 dnl thread_local macro from <threads.h>, and if so defines
311 dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
312 dnl support the GCC __thread extension, and if so defines
314 AC_DEFUN([OVS_CHECK_TLS],
316 [whether $CC has <threads.h> that supports thread_local],
317 [ovs_cv_thread_local],
319 [AC_LANG_PROGRAM([#include <threads.h>
320 static thread_local int var;], [return var;])],
321 [ovs_cv_thread_local=yes],
322 [ovs_cv_thread_local=no])])
323 if test $ovs_cv_thread_local = yes; then
324 AC_DEFINE([HAVE_THREAD_LOCAL], [1],
325 [Define to 1 if the C compiler and linker supports the C11
326 thread_local matcro defined in <threads.h>.])
329 [whether $CC supports __thread],
332 [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
333 [ovs_cv___thread=yes],
334 [ovs_cv___thread=no])])
335 if test $ovs_cv___thread = yes; then
336 AC_DEFINE([HAVE___THREAD], [1],
337 [Define to 1 if the C compiler and linker supports the
338 GCC __thread extenions.])
342 dnl OVS_CHECK_ATOMIC_LIBS
344 dnl Check to see if -latomic is need for GCC atomic built-ins.
345 AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
346 [AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
348 dnl OVS_CHECK_GCC4_ATOMICS
350 dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
351 dnl A compile-time only check is not enough because the compiler defers
352 dnl unimplemented built-ins to libgcc, which sometimes also lacks
354 AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
356 [whether $CC supports GCC 4.0+ atomic built-ins],
357 [ovs_cv_gcc4_atomics],
359 [AC_LANG_PROGRAM([[#include <stdlib.h>
361 #define ovs_assert(expr) if (!(expr)) abort();
362 #define TEST_ATOMIC_TYPE(TYPE) \
367 __sync_synchronize(); \
368 ovs_assert(x == 1); \
370 __sync_synchronize(); \
372 __sync_synchronize(); \
373 ovs_assert(x == 3); \
375 orig = __sync_fetch_and_add(&x, 1); \
376 ovs_assert(orig == 3); \
377 __sync_synchronize(); \
378 ovs_assert(x == 4); \
380 orig = __sync_fetch_and_sub(&x, 2); \
381 ovs_assert(orig == 4); \
382 __sync_synchronize(); \
383 ovs_assert(x == 2); \
385 orig = __sync_fetch_and_or(&x, 6); \
386 ovs_assert(orig == 2); \
387 __sync_synchronize(); \
388 ovs_assert(x == 6); \
390 orig = __sync_fetch_and_and(&x, 10); \
391 ovs_assert(orig == 6); \
392 __sync_synchronize(); \
393 ovs_assert(x == 2); \
395 orig = __sync_fetch_and_xor(&x, 10); \
396 ovs_assert(orig == 2); \
397 __sync_synchronize(); \
398 ovs_assert(x == 8); \
400 TEST_ATOMIC_TYPE(char);
401 TEST_ATOMIC_TYPE(unsigned char);
402 TEST_ATOMIC_TYPE(signed char);
403 TEST_ATOMIC_TYPE(short);
404 TEST_ATOMIC_TYPE(unsigned short);
405 TEST_ATOMIC_TYPE(int);
406 TEST_ATOMIC_TYPE(unsigned int);
407 TEST_ATOMIC_TYPE(long int);
408 TEST_ATOMIC_TYPE(unsigned long int);
409 TEST_ATOMIC_TYPE(long long int);
410 TEST_ATOMIC_TYPE(unsigned long long int);
412 [ovs_cv_gcc4_atomics=yes],
413 [ovs_cv_gcc4_atomics=no])])
414 if test $ovs_cv_gcc4_atomics = yes; then
415 AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
416 [Define to 1 if the C compiler and linker supports the GCC 4.0+
420 dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
422 dnl Checks __atomic_always_lock_free(SIZE, 0)
423 AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
425 [value of __atomic_always_lock_free($1)],
426 [ovs_cv_atomic_always_lock_free_$1],
428 [ovs_cv_atomic_always_lock_free_$1],
429 [__atomic_always_lock_free($1, 0)],
431 [ovs_cv_atomic_always_lock_free_$1=unsupported])])
432 if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
434 [ATOMIC_ALWAYS_LOCK_FREE_$1B],
435 [$ovs_cv_atomic_always_lock_free_$1],
436 [If the C compiler is GCC 4.7 or later, define to the return value of
437 __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
438 an older version of GCC, the value does not matter.])
441 dnl OVS_CHECK_POSIX_AIO
442 AC_DEFUN([OVS_CHECK_POSIX_AIO],
443 [AC_SEARCH_LIBS([aio_write], [rt])
444 AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
446 dnl OVS_CHECK_INCLUDE_NEXT
447 AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
448 [AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
449 gl_CHECK_NEXT_HEADERS([$1])])