3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 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 m4_include([m4/compat.at])
19 dnl Checks for --enable-coverage and updates CFLAGS and LDFLAGS appropriately.
20 AC_DEFUN([OVS_CHECK_COVERAGE],
21 [AC_REQUIRE([AC_PROG_CC])
24 [AC_HELP_STRING([--enable-coverage],
25 [Enable gcov coverage tool.])],
26 [case "${enableval}" in
27 (yes) coverage=true ;;
28 (no) coverage=false ;;
29 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-coverage]) ;;
33 # Autoconf by default puts "-g -O2" in CFLAGS. We need to remove the -O2
34 # option for coverage to be useful. This does it without otherwise
35 # interfering with anything that the user might have put there.
38 for option in $old_CFLAGS; do
41 (*) CFLAGS="$CFLAGS $option" ;;
45 OVS_CFLAGS="$OVS_CFLAGS --coverage"
46 OVS_LDFLAGS="$OVS_LDFLAGS --coverage"
49 dnl Checks for --enable-ndebug and defines NDEBUG if it is specified.
50 AC_DEFUN([OVS_CHECK_NDEBUG],
53 [AC_HELP_STRING([--enable-ndebug],
54 [Disable debugging features for max performance])],
55 [case "${enableval}" in
58 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ndebug]) ;;
61 AM_CONDITIONAL([NDEBUG], [test x$ndebug = xtrue])])
64 AC_DEFUN([OVS_CHECK_ESX],
65 [AC_CHECK_HEADER([vmware.h],
68 AM_CONDITIONAL([ESX], [test "$ESX" = yes])
69 if test "$ESX" = yes; then
70 AC_DEFINE([ESX], [1], [Define to 1 if building on ESX.])
73 dnl Checks for WINDOWS.
74 AC_DEFUN([OVS_CHECK_WIN32],
75 [AC_CHECK_HEADER([windows.h],
78 AM_CONDITIONAL([WIN32], [test "$WIN32" = yes])
79 if test "$WIN32" = yes; then
80 AC_ARG_WITH([pthread],
81 [AS_HELP_STRING([--with-pthread=DIR],
82 [root of the pthread-win32 directory])],
85 "" | y | ye | yes | n | no)
86 AC_MSG_ERROR([Invalid --with-pthread value])
89 PTHREAD_WIN32_DIR=$withval/lib/x86
90 PTHREAD_WIN32_DIR_DLL=/${withval/:/}/dll/x86
91 PTHREAD_INCLUDES=-I$withval/include
92 PTHREAD_LDFLAGS=-L$PTHREAD_WIN32_DIR
93 PTHREAD_LIBS="-lpthreadVC2"
94 AC_SUBST([PTHREAD_WIN32_DIR_DLL])
95 AC_SUBST([PTHREAD_INCLUDES])
96 AC_SUBST([PTHREAD_LDFLAGS])
97 AC_SUBST([PTHREAD_LIBS])
101 AC_MSG_ERROR([pthread directory not specified])
105 [AS_HELP_STRING([--with-debug],
106 [Build without compiler optimizations])],
109 AC_SUBST([MSVC_CFLAGS])
112 AC_SUBST([MSVC_CFLAGS])
116 AC_DEFINE([WIN32], [1], [Define to 1 if building on WIN32.])
117 AH_BOTTOM([#ifdef WIN32
118 #include "include/windows/windefs.h"
122 dnl OVS_CHECK_WINDOWS
124 dnl Configure Visual Studio solution build
125 AC_DEFUN([OVS_CHECK_VISUAL_STUDIO_DDK], [
126 AC_ARG_WITH([vstudiotarget],
127 [AS_HELP_STRING([--with-vstudiotarget=target_type],
128 [Target type: Debug/Release])],
133 *) AC_MSG_ERROR([No valid Visual Studio configuration found]) ;;
136 VSTUDIO_CONFIG=$withval
142 AC_SUBST([VSTUDIO_CONFIG])
143 AC_DEFINE([VSTUDIO_DDK], [1], [System uses the Visual Studio build target.])
144 AM_CONDITIONAL([VSTUDIO_DDK], [test -n "$VSTUDIO_CONFIG"])
147 dnl Checks for Netlink support.
148 AC_DEFUN([OVS_CHECK_NETLINK],
149 [AC_CHECK_HEADER([linux/netlink.h],
152 [#include <sys/socket.h>
154 AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
155 if test "$HAVE_NETLINK" = yes; then
156 AC_DEFINE([HAVE_NETLINK], [1],
157 [Define to 1 if Netlink protocol is available.])
160 dnl Checks for OpenSSL.
161 AC_DEFUN([OVS_CHECK_OPENSSL],
164 [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
165 [case "${enableval}" in
168 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
172 if test "$ssl" != false; then
176 if test "$ssl" = check; then
177 AC_MSG_WARN([Cannot find openssl:
181 OpenFlow connections over SSL will not be supported.
182 (You may use --disable-ssl to suppress this warning.)])
184 AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
189 AC_SUBST([HAVE_OPENSSL])
190 AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
191 if test "$HAVE_OPENSSL" = yes; then
192 AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
195 dnl Checks for libraries needed by lib/socket-util.c.
196 AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
197 [AC_CHECK_LIB([socket], [connect])
198 AC_SEARCH_LIBS([gethostbyname], [resolv])])
200 dnl Checks for the directory in which to store the PKI.
201 AC_DEFUN([OVS_CHECK_PKIDIR],
204 AC_HELP_STRING([--with-pkidir=DIR],
205 [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
207 [PKIDIR='${localstatedir}/lib/openvswitch/pki'])
210 dnl Checks for the directory in which to store pidfiles.
211 AC_DEFUN([OVS_CHECK_RUNDIR],
214 AC_HELP_STRING([--with-rundir=DIR],
215 [directory used for pidfiles
216 [[LOCALSTATEDIR/run/openvswitch]]]),
218 [RUNDIR='${localstatedir}/run/openvswitch'])
221 dnl Checks for the directory in which to store logs.
222 AC_DEFUN([OVS_CHECK_LOGDIR],
225 AC_HELP_STRING([--with-logdir=DIR],
226 [directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
228 [LOGDIR='${localstatedir}/log/${PACKAGE}'])
231 dnl Checks for the directory in which to store the Open vSwitch database.
232 AC_DEFUN([OVS_CHECK_DBDIR],
235 AC_HELP_STRING([--with-dbdir=DIR],
236 [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
238 [DBDIR='${sysconfdir}/${PACKAGE}'])
241 dnl Defines HAVE_BACKTRACE if backtrace() is found.
242 AC_DEFUN([OVS_CHECK_BACKTRACE],
243 [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
244 [AC_DEFINE([HAVE_BACKTRACE], [1],
245 [Define to 1 if you have backtrace(3).])])])
247 dnl Defines HAVE_PERF_EVENT if linux/perf_event.h is found.
248 AC_DEFUN([OVS_CHECK_PERF_EVENT],
249 [AC_CHECK_HEADERS([linux/perf_event.h])])
251 dnl Checks for valgrind/valgrind.h.
252 AC_DEFUN([OVS_CHECK_VALGRIND],
253 [AC_CHECK_HEADERS([valgrind/valgrind.h])])
255 dnl Checks for Python 2.x, x >= 4.
256 AC_DEFUN([OVS_CHECK_PYTHON],
258 [for Python 2.x for x >= 4],
260 [if test -n "$PYTHON"; then
261 ovs_cv_python=$PYTHON
264 for binary in python python2.4 python2.5 python2.7; do
265 ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
268 test -z "$dir" && dir=.
269 if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
270 if sys.hexversion >= 0x02040000 and sys.hexversion < 0x03000000:
274 ovs_cv_python=$dir/$binary
280 AC_SUBST([HAVE_PYTHON])
281 AM_MISSING_PROG([PYTHON], [python])
282 if test $ovs_cv_python != no; then
283 PYTHON=$ovs_cv_python
288 AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
291 AC_DEFUN([OVS_CHECK_DOT],
295 [dnl "dot" writes -V output to stderr:
296 if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
301 AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
303 dnl Checks whether $PYTHON supports the module given as $1
304 AC_DEFUN([OVS_CHECK_PYTHON_MODULE],
305 [AC_REQUIRE([OVS_CHECK_PYTHON])
307 [for $1 Python module],
308 [ovs_cv_py_[]AS_TR_SH([$1])],
309 [ovs_cv_py_[]AS_TR_SH([$1])=no
310 if test $HAVE_PYTHON = yes; then
311 AS_ECHO(["running $PYTHON -c 'import $1
313 sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1
314 if $PYTHON -c 'import $1
316 sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then
317 ovs_cv_py_[]AS_TR_SH([$1])=yes
321 dnl Checks for missing python modules at build time
322 AC_DEFUN([OVS_CHECK_PYTHON_COMPAT],
323 [OVS_CHECK_PYTHON_MODULE([uuid])
324 if test $ovs_cv_py_uuid = yes; then
325 INCLUDE_PYTHON_COMPAT=no
327 INCLUDE_PYTHON_COMPAT=yes
329 AC_MSG_CHECKING([whether to add python/compat to PYTHONPATH])
330 AC_MSG_RESULT([$INCLUDE_PYTHON_COMPAT])
331 AM_CONDITIONAL([INCLUDE_PYTHON_COMPAT], [test $INCLUDE_PYTHON_COMPAT = yes])])
333 dnl Checks for groff.
334 AC_DEFUN([OVS_CHECK_GROFF],
338 [if (groff -v) >/dev/null 2>&1; then
343 AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
345 dnl Checks for thread-local storage support.
347 dnl Checks whether the compiler and linker support the C11
348 dnl thread_local macro from <threads.h>, and if so defines
349 dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
350 dnl support the GCC __thread extension, and if so defines
352 AC_DEFUN([OVS_CHECK_TLS],
354 [whether $CC has <threads.h> that supports thread_local],
355 [ovs_cv_thread_local],
357 [AC_LANG_PROGRAM([#include <threads.h>
358 static thread_local int var;], [return var;])],
359 [ovs_cv_thread_local=yes],
360 [ovs_cv_thread_local=no])])
361 if test $ovs_cv_thread_local = yes; then
362 AC_DEFINE([HAVE_THREAD_LOCAL], [1],
363 [Define to 1 if the C compiler and linker supports the C11
364 thread_local matcro defined in <threads.h>.])
367 [whether $CC supports __thread],
370 [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
371 [ovs_cv___thread=yes],
372 [ovs_cv___thread=no])])
373 if test $ovs_cv___thread = yes; then
374 AC_DEFINE([HAVE___THREAD], [1],
375 [Define to 1 if the C compiler and linker supports the
376 GCC __thread extenions.])
380 dnl OVS_CHECK_ATOMIC_LIBS
382 dnl Check to see if -latomic is need for GCC atomic built-ins.
383 AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
384 [AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
386 dnl OVS_CHECK_GCC4_ATOMICS
388 dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
389 dnl A compile-time only check is not enough because the compiler defers
390 dnl unimplemented built-ins to libgcc, which sometimes also lacks
392 AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
394 [whether $CC supports GCC 4.0+ atomic built-ins],
395 [ovs_cv_gcc4_atomics],
397 [AC_LANG_PROGRAM([[#include <stdlib.h>
399 #define ovs_assert(expr) if (!(expr)) abort();
400 #define TEST_ATOMIC_TYPE(TYPE) \
405 __sync_synchronize(); \
406 ovs_assert(x == 1); \
408 __sync_synchronize(); \
410 __sync_synchronize(); \
411 ovs_assert(x == 3); \
413 orig = __sync_fetch_and_add(&x, 1); \
414 ovs_assert(orig == 3); \
415 __sync_synchronize(); \
416 ovs_assert(x == 4); \
418 orig = __sync_fetch_and_sub(&x, 2); \
419 ovs_assert(orig == 4); \
420 __sync_synchronize(); \
421 ovs_assert(x == 2); \
423 orig = __sync_fetch_and_or(&x, 6); \
424 ovs_assert(orig == 2); \
425 __sync_synchronize(); \
426 ovs_assert(x == 6); \
428 orig = __sync_fetch_and_and(&x, 10); \
429 ovs_assert(orig == 6); \
430 __sync_synchronize(); \
431 ovs_assert(x == 2); \
433 orig = __sync_fetch_and_xor(&x, 10); \
434 ovs_assert(orig == 2); \
435 __sync_synchronize(); \
436 ovs_assert(x == 8); \
438 TEST_ATOMIC_TYPE(char);
439 TEST_ATOMIC_TYPE(unsigned char);
440 TEST_ATOMIC_TYPE(signed char);
441 TEST_ATOMIC_TYPE(short);
442 TEST_ATOMIC_TYPE(unsigned short);
443 TEST_ATOMIC_TYPE(int);
444 TEST_ATOMIC_TYPE(unsigned int);
445 TEST_ATOMIC_TYPE(long int);
446 TEST_ATOMIC_TYPE(unsigned long int);
447 TEST_ATOMIC_TYPE(long long int);
448 TEST_ATOMIC_TYPE(unsigned long long int);
450 [ovs_cv_gcc4_atomics=yes],
451 [ovs_cv_gcc4_atomics=no])])
452 if test $ovs_cv_gcc4_atomics = yes; then
453 AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
454 [Define to 1 if the C compiler and linker supports the GCC 4.0+
458 dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
460 dnl Checks __atomic_always_lock_free(SIZE, 0)
461 AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
463 [value of __atomic_always_lock_free($1)],
464 [ovs_cv_atomic_always_lock_free_$1],
466 [ovs_cv_atomic_always_lock_free_$1],
467 [__atomic_always_lock_free($1, 0)],
469 [ovs_cv_atomic_always_lock_free_$1=unsupported])])
470 if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
472 [ATOMIC_ALWAYS_LOCK_FREE_$1B],
473 [$ovs_cv_atomic_always_lock_free_$1],
474 [If the C compiler is GCC 4.7 or later, define to the return value of
475 __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
476 an older version of GCC, the value does not matter.])
479 dnl OVS_CHECK_POSIX_AIO
480 AC_DEFUN([OVS_CHECK_POSIX_AIO],
481 [AC_SEARCH_LIBS([aio_write], [rt])
482 AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
484 dnl OVS_CHECK_INCLUDE_NEXT
485 AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
486 [AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
487 gl_CHECK_NEXT_HEADERS([$1])])
489 dnl OVS_CHECK_PRAGMA_MESSAGE
490 AC_DEFUN([OVS_CHECK_PRAGMA_MESSAGE],
491 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
492 [[_Pragma("message(\"Checking for pragma message\")")
494 [AC_DEFINE(HAVE_PRAGMA_MESSAGE,1,[Define if compiler supports #pragma
495 message directive])])