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 Netlink support.
60 AC_DEFUN([OVS_CHECK_NETLINK],
61 [AC_CHECK_HEADER([linux/netlink.h],
64 [#include <sys/socket.h>
65 #include <linux/types.h>
67 AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
68 if test "$HAVE_NETLINK" = yes; then
69 AC_DEFINE([HAVE_NETLINK], [1],
70 [Define to 1 if Netlink protocol is available.])
73 dnl Checks for OpenSSL.
74 AC_DEFUN([OVS_CHECK_OPENSSL],
77 [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
78 [case "${enableval}" in
81 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
85 if test "$ssl" != false; then
89 if test "$ssl" = check; then
90 AC_MSG_WARN([Cannot find openssl:
94 OpenFlow connections over SSL will not be supported.
95 (You may use --disable-ssl to suppress this warning.)])
97 AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
102 AC_SUBST([HAVE_OPENSSL])
103 AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
104 if test "$HAVE_OPENSSL" = yes; then
105 AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
108 dnl Checks for libraries needed by lib/socket-util.c.
109 AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
110 [AC_CHECK_LIB([socket], [connect])
111 AC_SEARCH_LIBS([gethostbyname], [resolv], [RESOLVER_LIBS=-lresolv])])
113 dnl Checks for the directory in which to store the PKI.
114 AC_DEFUN([OVS_CHECK_PKIDIR],
117 AC_HELP_STRING([--with-pkidir=DIR],
118 [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
120 [PKIDIR='${localstatedir}/lib/openvswitch/pki'])
123 dnl Checks for the directory in which to store pidfiles.
124 AC_DEFUN([OVS_CHECK_RUNDIR],
127 AC_HELP_STRING([--with-rundir=DIR],
128 [directory used for pidfiles
129 [[LOCALSTATEDIR/run/openvswitch]]]),
131 [RUNDIR='${localstatedir}/run/openvswitch'])
134 dnl Checks for the directory in which to store logs.
135 AC_DEFUN([OVS_CHECK_LOGDIR],
138 AC_HELP_STRING([--with-logdir=DIR],
139 [directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
141 [LOGDIR='${localstatedir}/log/${PACKAGE}'])
144 dnl Checks for the directory in which to store the Open vSwitch database.
145 AC_DEFUN([OVS_CHECK_DBDIR],
148 AC_HELP_STRING([--with-dbdir=DIR],
149 [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
151 [DBDIR='${sysconfdir}/${PACKAGE}'])
154 dnl Defines HAVE_BACKTRACE if backtrace() is found.
155 AC_DEFUN([OVS_CHECK_BACKTRACE],
156 [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
157 [AC_DEFINE([HAVE_BACKTRACE], [1],
158 [Define to 1 if you have backtrace(3).])])])
160 dnl Checks for __malloc_hook, etc., supported by glibc.
161 AC_DEFUN([OVS_CHECK_MALLOC_HOOKS],
163 [whether libc supports hooks for malloc and related functions],
164 [ovs_cv_malloc_hooks],
169 [(void) __malloc_hook;
170 (void) __realloc_hook;
171 (void) __free_hook;])],
172 [ovs_cv_malloc_hooks=yes],
173 [ovs_cv_malloc_hooks=no])])
174 if test $ovs_cv_malloc_hooks = yes; then
175 AC_DEFINE([HAVE_MALLOC_HOOKS], [1],
176 [Define to 1 if you have __malloc_hook, __realloc_hook, and
177 __free_hook in <malloc.h>.])
180 dnl Checks for valgrind/valgrind.h.
181 AC_DEFUN([OVS_CHECK_VALGRIND],
182 [AC_CHECK_HEADERS([valgrind/valgrind.h])])
184 dnl Checks for Python 2.x, x >= 4.
185 AC_DEFUN([OVS_CHECK_PYTHON],
187 [for Python 2.x for x >= 4],
189 [if test -n "$PYTHON"; then
190 ovs_cv_python=$PYTHON
193 for binary in python python2.4 python2.5; do
194 ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
197 test -z "$dir" && dir=.
198 if test -x $dir/$binary && $dir/$binary -c 'import sys
199 if sys.hexversion >= 0x02040000 and sys.hexversion < 0x03000000:
203 ovs_cv_python=$dir/$binary
209 AC_SUBST([HAVE_PYTHON])
210 AM_MISSING_PROG([PYTHON], [python])
211 if test $ovs_cv_python != no; then
212 PYTHON=$ovs_cv_python
217 AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
220 AC_DEFUN([OVS_CHECK_DOT],
224 [dnl "dot" writes -V output to stderr:
225 if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
230 AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
232 dnl Checks for pyuic4.
233 AC_DEFUN([OVS_CHECK_PYUIC4],
237 [if (pyuic4 --version) >/dev/null 2>&1; then
242 AM_MISSING_PROG([PYUIC4], [pyuic4])
243 if test $ovs_cv_pyuic4 != no; then
244 PYUIC4=$ovs_cv_pyuic4
247 dnl Checks whether $PYTHON supports the module given as $1
248 AC_DEFUN([OVS_CHECK_PYTHON_MODULE],
249 [AC_REQUIRE([OVS_CHECK_PYTHON])
251 [for $1 Python module],
252 [ovs_cv_py_[]AS_TR_SH([$1])],
253 [ovs_cv_py_[]AS_TR_SH([$1])=no
254 if test $HAVE_PYTHON = yes; then
255 AS_ECHO(["running $PYTHON -c 'import $1
257 sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1
258 if $PYTHON -c 'import $1
260 sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then
261 ovs_cv_py_[]AS_TR_SH([$1])=yes
265 dnl Checks for Python modules needed by ovsdbmonitor.
266 AC_DEFUN([OVS_CHECK_OVSDBMONITOR],
267 [OVS_CHECK_PYTHON_MODULE([PySide.QtCore])
268 OVS_CHECK_PYTHON_MODULE([PyQt4.QtCore])
269 OVS_CHECK_PYTHON_MODULE([twisted.conch.ssh])
270 OVS_CHECK_PYTHON_MODULE([twisted.internet])
271 OVS_CHECK_PYTHON_MODULE([twisted.application])
272 OVS_CHECK_PYTHON_MODULE([json])
273 OVS_CHECK_PYTHON_MODULE([zope.interface])
274 if (test $ovs_cv_py_PySide_QtCore = yes \
275 || test $ovs_cv_py_PyQt4_QtCore = yes) \
276 && test $ovs_cv_py_twisted_conch_ssh = yes \
277 && test $ovs_cv_py_twisted_internet = yes \
278 && test $ovs_cv_py_twisted_application = yes \
279 && test $ovs_cv_py_json = yes \
280 && test $ovs_cv_py_zope_interface = yes; then
281 BUILD_OVSDBMONITOR=yes
283 BUILD_OVSDBMONITOR=no
285 AC_MSG_CHECKING([whether to build ovsdbmonitor])
286 AC_MSG_RESULT([$BUILD_OVSDBMONITOR])
287 AM_CONDITIONAL([BUILD_OVSDBMONITOR], [test $BUILD_OVSDBMONITOR = yes])])
289 # OVS_LINK2_IFELSE(SOURCE1, SOURCE2, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
290 # -------------------------------------------------------------
291 # Based on AC_LINK_IFELSE, but tries to link both SOURCE1 and SOURCE2
294 # This macro is borrowed from acinclude.m4 in GNU PSPP, which has the
297 # Copyright (C) 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
298 # This file is free software; the Free Software Foundation
299 # gives unlimited permission to copy and/or distribute it,
300 # with or without modifications, as long as this notice is preserved.
302 m4_define([OVS_LINK2_IFELSE],
303 [m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
304 mv conftest.$ac_ext conftest1.$ac_ext
305 m4_ifvaln([$2], [AC_LANG_CONFTEST([$2])])dnl
306 mv conftest.$ac_ext conftest2.$ac_ext
307 rm -f conftest1.$ac_objext conftest2.$ac_objext conftest$ac_exeext
308 ovs_link2='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest1.$ac_ext conftest2.$ac_ext $LIBS >&5'
309 AS_IF([_AC_DO_STDERR($ovs_link2) && {
310 test -z "$ac_[]_AC_LANG_ABBREV[]_werror_flag" ||
311 test ! -s conftest.err
312 } && test -s conftest$ac_exeext && {
313 test "$cross_compiling" = yes ||
314 AS_TEST_X([conftest$ac_exeext])
317 [echo "$as_me: failed source file 1 of 2 was:" >&5
318 sed 's/^/| /' conftest1.$ac_ext >&5
319 echo "$as_me: failed source file 2 of 2 was:" >&5
320 sed 's/^/| /' conftest2.$ac_ext >&5
322 dnl Delete also the IPA/IPO (Inter Procedural Analysis/Optimization)
323 dnl information created by the PGI compiler (conftest_ipa8_conftest.oo),
324 dnl as it would interfere with the next link command.
325 rm -rf conftest.dSYM conftest1.dSYM conftest2.dSYM
326 rm -f core conftest.err conftest1.err conftest2.err
327 rm -f conftest1.$ac_objext conftest2.$ac_objext conftest*_ipa8_conftest*.oo
328 rm -f conftest$ac_exeext
329 rm -f m4_ifval([$1], [conftest1.$ac_ext]) m4_ifval([$2], [conftest1.$ac_ext])[]dnl
332 dnl Defines USE_LINKER_SECTIONS to 1 if the compiler supports putting
333 dnl variables in sections with user-defined names and the linker
334 dnl automatically defines __start_SECNAME and __stop_SECNAME symbols
335 dnl that designate the start and end of the sections.
336 AC_DEFUN([OVS_CHECK_LINKER_SECTIONS],
338 [for user-defined linker section support],
339 [ovs_cv_use_linker_sections],
342 [int a __attribute__((__section__("mysection"))) = 1;
343 int b __attribute__((__section__("mysection"))) = 2;
344 int c __attribute__((__section__("mysection"))) = 3;])],
347 extern int __start_mysection;
348 extern int __stop_mysection;],
349 [int n_ints = &__stop_mysection - &__start_mysection;
351 for (i = &__start_mysection; i < &__start_mysection + n_ints; i++) {
354 [ovs_cv_use_linker_sections=yes],
355 [ovs_cv_use_linker_sections=no])])
356 if test $ovs_cv_use_linker_sections = yes; then
357 AC_DEFINE([USE_LINKER_SECTIONS], [1],
358 [Define to 1 if the compiler support putting variables
359 into sections with user-defined names and the linker
360 automatically defines __start_SECNAME and __stop_SECNAME
361 symbols that designate the start and end of the section.])
364 [USE_LINKER_SECTIONS], [test $ovs_cv_use_linker_sections = yes])])
366 dnl Checks for groff.
367 AC_DEFUN([OVS_CHECK_GROFF],
371 [if (groff -v) >/dev/null 2>&1; then
376 AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
378 dnl Checks for thread-local storage support.
380 dnl Checks whether the compiler and linker support the C11
381 dnl thread_local macro from <threads.h>, and if so defines
382 dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
383 dnl support the GCC __thread extension, and if so defines
385 AC_DEFUN([OVS_CHECK_TLS],
387 [whether $CC has <threads.h> that supports thread_local],
388 [ovs_cv_thread_local],
390 [AC_LANG_PROGRAM([#include <threads.h>
391 static thread_local int var;], [return var;])],
392 [ovs_cv_thread_local=yes],
393 [ovs_cv_thread_local=no])])
394 if test $ovs_cv_thread_local = yes; then
395 AC_DEFINE([HAVE_THREAD_LOCAL], [1],
396 [Define to 1 if the C compiler and linker supports the C11
397 thread_local matcro defined in <threads.h>.])
400 [whether $CC supports __thread],
403 [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
404 [ovs_cv___thread=yes],
405 [ovs_cv___thread=no])])
406 if test $ovs_cv___thread = yes; then
407 AC_DEFINE([HAVE___THREAD], [1],
408 [Define to 1 if the C compiler and linker supports the
409 GCC __thread extenions.])
413 dnl OVS_CHECK_GCC4_ATOMICS
415 dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
416 dnl A compile-time only check is not enough because the compiler defers
417 dnl unimplemented built-ins to libgcc, which sometimes also lacks
419 AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
421 [whether $CC supports GCC 4.0+ atomic built-ins],
422 [ovs_cv_gcc4_atomics],
424 [AC_LANG_PROGRAM([[#include <stdlib.h>
426 #define ovs_assert(expr) if (!(expr)) abort();
427 #define TEST_ATOMIC_TYPE(TYPE) \
432 __sync_synchronize(); \
433 ovs_assert(x == 1); \
435 __sync_synchronize(); \
437 __sync_synchronize(); \
438 ovs_assert(x == 3); \
440 orig = __sync_fetch_and_add(&x, 1); \
441 ovs_assert(orig == 3); \
442 __sync_synchronize(); \
443 ovs_assert(x == 4); \
445 orig = __sync_fetch_and_sub(&x, 2); \
446 ovs_assert(orig == 4); \
447 __sync_synchronize(); \
448 ovs_assert(x == 2); \
450 orig = __sync_fetch_and_or(&x, 6); \
451 ovs_assert(orig == 2); \
452 __sync_synchronize(); \
453 ovs_assert(x == 6); \
455 orig = __sync_fetch_and_and(&x, 10); \
456 ovs_assert(orig == 6); \
457 __sync_synchronize(); \
458 ovs_assert(x == 2); \
460 orig = __sync_fetch_and_xor(&x, 10); \
461 ovs_assert(orig == 2); \
462 __sync_synchronize(); \
463 ovs_assert(x == 8); \
465 TEST_ATOMIC_TYPE(char);
466 TEST_ATOMIC_TYPE(unsigned char);
467 TEST_ATOMIC_TYPE(signed char);
468 TEST_ATOMIC_TYPE(short);
469 TEST_ATOMIC_TYPE(unsigned short);
470 TEST_ATOMIC_TYPE(int);
471 TEST_ATOMIC_TYPE(unsigned int);
472 TEST_ATOMIC_TYPE(long int);
473 TEST_ATOMIC_TYPE(unsigned long int);
474 TEST_ATOMIC_TYPE(long long int);
475 TEST_ATOMIC_TYPE(unsigned long long int);
477 [ovs_cv_gcc4_atomics=yes],
478 [ovs_cv_gcc4_atomics=no])])
479 if test $ovs_cv_gcc4_atomics = yes; then
480 AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
481 [Define to 1 if the C compiler and linker supports the GCC 4.0+
485 dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
487 dnl Checks __atomic_always_lock_free(SIZE, 0)
488 AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
490 [value of __atomic_always_lock_free($1)],
491 [ovs_cv_atomic_always_lock_free_$1],
493 [ovs_cv_atomic_always_lock_free_$1],
494 [__atomic_always_lock_free($1, 0)],
496 [ovs_cv_atomic_always_lock_free_$1=unsupported])])
497 if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
499 [ATOMIC_ALWAYS_LOCK_FREE_$1B],
500 [$ovs_cv_atomic_always_lock_free_$1],
501 [If the C compiler is GCC 4.7 or later, define to the return value of
502 __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
503 an older version of GCC, the value does not matter.])
506 dnl OVS_CHECK_POSIX_AIO
507 AC_DEFUN([OVS_CHECK_POSIX_AIO],
508 [AC_SEARCH_LIBS([aio_write], [rt])
509 AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])