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_INCLUDES="-I$withval/include"
90 PTHREAD_LDFLAGS="-L$withval/lib/x86"
91 PTHREAD_LIBS="-lpthreadVC2"
92 AC_SUBST([PTHREAD_INCLUDES])
93 AC_SUBST([PTHREAD_LDFLAGS])
94 AC_SUBST([PTHREAD_LIBS])
98 AC_MSG_ERROR([pthread directory not specified])
102 [AS_HELP_STRING([--with-debug],
103 [Build without compiler optimizations])],
106 AC_SUBST([MSVC_CFLAGS])
109 AC_SUBST([MSVC_CFLAGS])
113 AC_DEFINE([WIN32], [1], [Define to 1 if building on WIN32.])
114 AH_BOTTOM([#ifdef WIN32
115 #include "include/windows/windefs.h"
119 dnl OVS_CHECK_WINDOWS
121 dnl Configure Visual Studio solution build
122 AC_DEFUN([OVS_CHECK_VISUAL_STUDIO_DDK], [
123 AC_ARG_WITH([vstudiotarget],
124 [AS_HELP_STRING([--with-vstudiotarget=target_type],
125 [Target type: Debug/Release])],
130 *) AC_MSG_ERROR([No valid Visual Studio configuration found]) ;;
133 VSTUDIO_CONFIG=$withval
139 AC_SUBST([VSTUDIO_CONFIG])
140 AC_DEFINE([VSTUDIO_DDK], [1], [System uses the Visual Studio build target.])
141 AM_CONDITIONAL([VSTUDIO_DDK], [test -n "$VSTUDIO_CONFIG"])
144 dnl Checks for Netlink support.
145 AC_DEFUN([OVS_CHECK_NETLINK],
146 [AC_CHECK_HEADER([linux/netlink.h],
149 [#include <sys/socket.h>
151 AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
152 if test "$HAVE_NETLINK" = yes; then
153 AC_DEFINE([HAVE_NETLINK], [1],
154 [Define to 1 if Netlink protocol is available.])
157 dnl Checks for OpenSSL.
158 AC_DEFUN([OVS_CHECK_OPENSSL],
161 [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
162 [case "${enableval}" in
165 (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
169 if test "$ssl" != false; then
173 if test "$ssl" = check; then
174 AC_MSG_WARN([Cannot find openssl:
178 OpenFlow connections over SSL will not be supported.
179 (You may use --disable-ssl to suppress this warning.)])
181 AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
186 AC_SUBST([HAVE_OPENSSL])
187 AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
188 if test "$HAVE_OPENSSL" = yes; then
189 AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
192 dnl Checks for libraries needed by lib/socket-util.c.
193 AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
194 [AC_CHECK_LIB([socket], [connect])
195 AC_SEARCH_LIBS([gethostbyname], [resolv])])
197 dnl Checks for the directory in which to store the PKI.
198 AC_DEFUN([OVS_CHECK_PKIDIR],
201 AC_HELP_STRING([--with-pkidir=DIR],
202 [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
204 [PKIDIR='${localstatedir}/lib/openvswitch/pki'])
207 dnl Checks for the directory in which to store pidfiles.
208 AC_DEFUN([OVS_CHECK_RUNDIR],
211 AC_HELP_STRING([--with-rundir=DIR],
212 [directory used for pidfiles
213 [[LOCALSTATEDIR/run/openvswitch]]]),
215 [RUNDIR='${localstatedir}/run/openvswitch'])
218 dnl Checks for the directory in which to store logs.
219 AC_DEFUN([OVS_CHECK_LOGDIR],
222 AC_HELP_STRING([--with-logdir=DIR],
223 [directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
225 [LOGDIR='${localstatedir}/log/${PACKAGE}'])
228 dnl Checks for the directory in which to store the Open vSwitch database.
229 AC_DEFUN([OVS_CHECK_DBDIR],
232 AC_HELP_STRING([--with-dbdir=DIR],
233 [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
235 [DBDIR='${sysconfdir}/${PACKAGE}'])
238 dnl Defines HAVE_BACKTRACE if backtrace() is found.
239 AC_DEFUN([OVS_CHECK_BACKTRACE],
240 [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
241 [AC_DEFINE([HAVE_BACKTRACE], [1],
242 [Define to 1 if you have backtrace(3).])])])
244 dnl Defines HAVE_PERF_EVENT if linux/perf_event.h is found.
245 AC_DEFUN([OVS_CHECK_PERF_EVENT],
246 [AC_CHECK_HEADERS([linux/perf_event.h])])
248 dnl Checks for valgrind/valgrind.h.
249 AC_DEFUN([OVS_CHECK_VALGRIND],
250 [AC_CHECK_HEADERS([valgrind/valgrind.h])])
252 dnl Checks for Python 2.x, x >= 7.
253 AC_DEFUN([OVS_CHECK_PYTHON],
255 [for Python 2.x for x >= 7],
257 [if test -n "$PYTHON"; then
258 ovs_cv_python=$PYTHON
261 for binary in python python2.7; do
262 ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
265 test -z "$dir" && dir=.
266 if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
267 if sys.hexversion >= 0x02070000 and sys.hexversion < 0x03000000:
271 ovs_cv_python=$dir/$binary
277 AC_SUBST([HAVE_PYTHON])
278 AM_MISSING_PROG([PYTHON], [python])
279 if test $ovs_cv_python != no; then
280 PYTHON=$ovs_cv_python
285 AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
288 AC_DEFUN([OVS_CHECK_DOT],
292 [dnl "dot" writes -V output to stderr:
293 if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
298 AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
300 dnl Checks for groff.
301 AC_DEFUN([OVS_CHECK_GROFF],
305 [if (groff -v) >/dev/null 2>&1; then
310 AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
312 dnl Checks for thread-local storage support.
314 dnl Checks whether the compiler and linker support the C11
315 dnl thread_local macro from <threads.h>, and if so defines
316 dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
317 dnl support the GCC __thread extension, and if so defines
319 AC_DEFUN([OVS_CHECK_TLS],
321 [whether $CC has <threads.h> that supports thread_local],
322 [ovs_cv_thread_local],
324 [AC_LANG_PROGRAM([#include <threads.h>
325 static thread_local int var;], [return var;])],
326 [ovs_cv_thread_local=yes],
327 [ovs_cv_thread_local=no])])
328 if test $ovs_cv_thread_local = yes; then
329 AC_DEFINE([HAVE_THREAD_LOCAL], [1],
330 [Define to 1 if the C compiler and linker supports the C11
331 thread_local matcro defined in <threads.h>.])
334 [whether $CC supports __thread],
337 [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
338 [ovs_cv___thread=yes],
339 [ovs_cv___thread=no])])
340 if test $ovs_cv___thread = yes; then
341 AC_DEFINE([HAVE___THREAD], [1],
342 [Define to 1 if the C compiler and linker supports the
343 GCC __thread extenions.])
347 dnl OVS_CHECK_ATOMIC_LIBS
349 dnl Check to see if -latomic is need for GCC atomic built-ins.
350 AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
351 [AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
353 dnl OVS_CHECK_GCC4_ATOMICS
355 dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
356 dnl A compile-time only check is not enough because the compiler defers
357 dnl unimplemented built-ins to libgcc, which sometimes also lacks
359 AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
361 [whether $CC supports GCC 4.0+ atomic built-ins],
362 [ovs_cv_gcc4_atomics],
364 [AC_LANG_PROGRAM([[#include <stdlib.h>
366 #define ovs_assert(expr) if (!(expr)) abort();
367 #define TEST_ATOMIC_TYPE(TYPE) \
372 __sync_synchronize(); \
373 ovs_assert(x == 1); \
375 __sync_synchronize(); \
377 __sync_synchronize(); \
378 ovs_assert(x == 3); \
380 orig = __sync_fetch_and_add(&x, 1); \
381 ovs_assert(orig == 3); \
382 __sync_synchronize(); \
383 ovs_assert(x == 4); \
385 orig = __sync_fetch_and_sub(&x, 2); \
386 ovs_assert(orig == 4); \
387 __sync_synchronize(); \
388 ovs_assert(x == 2); \
390 orig = __sync_fetch_and_or(&x, 6); \
391 ovs_assert(orig == 2); \
392 __sync_synchronize(); \
393 ovs_assert(x == 6); \
395 orig = __sync_fetch_and_and(&x, 10); \
396 ovs_assert(orig == 6); \
397 __sync_synchronize(); \
398 ovs_assert(x == 2); \
400 orig = __sync_fetch_and_xor(&x, 10); \
401 ovs_assert(orig == 2); \
402 __sync_synchronize(); \
403 ovs_assert(x == 8); \
405 TEST_ATOMIC_TYPE(char);
406 TEST_ATOMIC_TYPE(unsigned char);
407 TEST_ATOMIC_TYPE(signed char);
408 TEST_ATOMIC_TYPE(short);
409 TEST_ATOMIC_TYPE(unsigned short);
410 TEST_ATOMIC_TYPE(int);
411 TEST_ATOMIC_TYPE(unsigned int);
412 TEST_ATOMIC_TYPE(long int);
413 TEST_ATOMIC_TYPE(unsigned long int);
414 TEST_ATOMIC_TYPE(long long int);
415 TEST_ATOMIC_TYPE(unsigned long long int);
417 [ovs_cv_gcc4_atomics=yes],
418 [ovs_cv_gcc4_atomics=no])])
419 if test $ovs_cv_gcc4_atomics = yes; then
420 AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
421 [Define to 1 if the C compiler and linker supports the GCC 4.0+
425 dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
427 dnl Checks __atomic_always_lock_free(SIZE, 0)
428 AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
430 [value of __atomic_always_lock_free($1)],
431 [ovs_cv_atomic_always_lock_free_$1],
433 [ovs_cv_atomic_always_lock_free_$1],
434 [__atomic_always_lock_free($1, 0)],
436 [ovs_cv_atomic_always_lock_free_$1=unsupported])])
437 if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
439 [ATOMIC_ALWAYS_LOCK_FREE_$1B],
440 [$ovs_cv_atomic_always_lock_free_$1],
441 [If the C compiler is GCC 4.7 or later, define to the return value of
442 __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
443 an older version of GCC, the value does not matter.])
446 dnl OVS_CHECK_POSIX_AIO
447 AC_DEFUN([OVS_CHECK_POSIX_AIO],
448 [AC_SEARCH_LIBS([aio_write], [rt])
449 AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
451 dnl OVS_CHECK_INCLUDE_NEXT
452 AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
453 [AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
454 gl_CHECK_NEXT_HEADERS([$1])])
456 dnl OVS_CHECK_PRAGMA_MESSAGE
457 AC_DEFUN([OVS_CHECK_PRAGMA_MESSAGE],
458 [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
459 [[_Pragma("message(\"Checking for pragma message\")")
461 [AC_DEFINE(HAVE_PRAGMA_MESSAGE,1,[Define if compiler supports #pragma
462 message directive])])