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064af421 BP |
1 | # -*- autoconf -*- |
2 | ||
c22095a5 | 3 | # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc. |
064af421 | 4 | # |
a14bc59f BP |
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: | |
064af421 | 8 | # |
a14bc59f BP |
9 | # http://www.apache.org/licenses/LICENSE-2.0 |
10 | # | |
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. | |
064af421 | 16 | |
c2b07021 BP |
17 | dnl Checks for --enable-coverage and updates CFLAGS and LDFLAGS appropriately. |
18 | AC_DEFUN([OVS_CHECK_COVERAGE], | |
19 | [AC_REQUIRE([AC_PROG_CC]) | |
20 | AC_ARG_ENABLE( | |
21 | [coverage], | |
2e22e1c7 | 22 | [AC_HELP_STRING([--enable-coverage], |
c2b07021 BP |
23 | [Enable gcov coverage tool.])], |
24 | [case "${enableval}" in | |
8faa5a21 | 25 | (yes) coverage=true ;; |
7c126fbb | 26 | (no) coverage=false ;; |
c2b07021 BP |
27 | (*) AC_MSG_ERROR([bad value ${enableval} for --enable-coverage]) ;; |
28 | esac], | |
7c126fbb | 29 | [coverage=false]) |
c2b07021 BP |
30 | if $coverage; then |
31 | CFLAGS="$CFLAGS -O0 --coverage" | |
32 | LDFLAGS="$LDFLAGS --coverage" | |
7c126fbb | 33 | fi]) |
c2b07021 | 34 | |
064af421 BP |
35 | dnl Checks for --enable-ndebug and defines NDEBUG if it is specified. |
36 | AC_DEFUN([OVS_CHECK_NDEBUG], | |
37 | [AC_ARG_ENABLE( | |
38 | [ndebug], | |
2e22e1c7 | 39 | [AC_HELP_STRING([--enable-ndebug], |
064af421 BP |
40 | [Disable debugging features for max performance])], |
41 | [case "${enableval}" in | |
42 | (yes) ndebug=true ;; | |
43 | (no) ndebug=false ;; | |
44 | (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ndebug]) ;; | |
45 | esac], | |
46 | [ndebug=false]) | |
47 | AM_CONDITIONAL([NDEBUG], [test x$ndebug = xtrue])]) | |
48 | ||
361906b1 EJ |
49 | dnl Checks for ESX. |
50 | AC_DEFUN([OVS_CHECK_ESX], | |
51 | [AC_CHECK_HEADER([vmware.h], | |
52 | [ESX=yes], | |
53 | [ESX=no]) | |
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.]) | |
57 | fi]) | |
58 | ||
db6964bb GS |
59 | dnl Checks for WINDOWS. |
60 | AC_DEFUN([OVS_CHECK_WIN32], | |
61 | [AC_CHECK_HEADER([windows.h], | |
62 | [WIN32=yes], | |
63 | [WIN32=no]) | |
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.]) | |
e42dfc72 AS |
67 | AH_BOTTOM([#ifdef WIN32 |
68 | #include "include/windows/windefs.h" | |
69 | #endif]) | |
db6964bb GS |
70 | fi]) |
71 | ||
064af421 BP |
72 | dnl Checks for Netlink support. |
73 | AC_DEFUN([OVS_CHECK_NETLINK], | |
74 | [AC_CHECK_HEADER([linux/netlink.h], | |
75 | [HAVE_NETLINK=yes], | |
76 | [HAVE_NETLINK=no], | |
77 | [#include <sys/socket.h> | |
78 | #include <linux/types.h> | |
79 | ]) | |
80 | AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes]) | |
81 | if test "$HAVE_NETLINK" = yes; then | |
82 | AC_DEFINE([HAVE_NETLINK], [1], | |
83 | [Define to 1 if Netlink protocol is available.]) | |
84 | fi]) | |
85 | ||
f272ec73 | 86 | dnl Checks for OpenSSL. |
064af421 BP |
87 | AC_DEFUN([OVS_CHECK_OPENSSL], |
88 | [AC_ARG_ENABLE( | |
89 | [ssl], | |
f272ec73 | 90 | [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])], |
064af421 BP |
91 | [case "${enableval}" in |
92 | (yes) ssl=true ;; | |
93 | (no) ssl=false ;; | |
94 | (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;; | |
95 | esac], | |
f272ec73 | 96 | [ssl=check]) |
064af421 | 97 | |
f272ec73 | 98 | if test "$ssl" != false; then |
0f31bef5 | 99 | AX_CHECK_OPENSSL( |
48b9616a BP |
100 | [HAVE_OPENSSL=yes], |
101 | [HAVE_OPENSSL=no | |
f272ec73 | 102 | if test "$ssl" = check; then |
924c2434 | 103 | AC_MSG_WARN([Cannot find openssl: |
064af421 | 104 | |
48b9616a | 105 | $SSL_PKG_ERRORS |
064af421 | 106 | |
f272ec73 BP |
107 | OpenFlow connections over SSL will not be supported. |
108 | (You may use --disable-ssl to suppress this warning.)]) | |
109 | else | |
924c2434 | 110 | AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)]) |
f272ec73 | 111 | fi]) |
869decd4 BP |
112 | else |
113 | HAVE_OPENSSL=no | |
064af421 | 114 | fi |
d27ce529 | 115 | AC_SUBST([HAVE_OPENSSL]) |
064af421 BP |
116 | AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes]) |
117 | if test "$HAVE_OPENSSL" = yes; then | |
118 | AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.]) | |
119 | fi]) | |
120 | ||
064af421 BP |
121 | dnl Checks for libraries needed by lib/socket-util.c. |
122 | AC_DEFUN([OVS_CHECK_SOCKET_LIBS], | |
123 | [AC_CHECK_LIB([socket], [connect]) | |
c6e02a5c | 124 | AC_SEARCH_LIBS([gethostbyname], [resolv])]) |
064af421 BP |
125 | |
126 | dnl Checks for the directory in which to store the PKI. | |
127 | AC_DEFUN([OVS_CHECK_PKIDIR], | |
128 | [AC_ARG_WITH( | |
2e22e1c7 EJ |
129 | [pkidir], |
130 | AC_HELP_STRING([--with-pkidir=DIR], | |
14bd2d51 | 131 | [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]), |
064af421 | 132 | [PKIDIR=$withval], |
14bd2d51 | 133 | [PKIDIR='${localstatedir}/lib/openvswitch/pki']) |
064af421 BP |
134 | AC_SUBST([PKIDIR])]) |
135 | ||
136 | dnl Checks for the directory in which to store pidfiles. | |
137 | AC_DEFUN([OVS_CHECK_RUNDIR], | |
138 | [AC_ARG_WITH( | |
2e22e1c7 EJ |
139 | [rundir], |
140 | AC_HELP_STRING([--with-rundir=DIR], | |
bc391960 JP |
141 | [directory used for pidfiles |
142 | [[LOCALSTATEDIR/run/openvswitch]]]), | |
064af421 | 143 | [RUNDIR=$withval], |
bc391960 | 144 | [RUNDIR='${localstatedir}/run/openvswitch']) |
064af421 BP |
145 | AC_SUBST([RUNDIR])]) |
146 | ||
147 | dnl Checks for the directory in which to store logs. | |
148 | AC_DEFUN([OVS_CHECK_LOGDIR], | |
149 | [AC_ARG_WITH( | |
2e22e1c7 EJ |
150 | [logdir], |
151 | AC_HELP_STRING([--with-logdir=DIR], | |
064af421 BP |
152 | [directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]), |
153 | [LOGDIR=$withval], | |
154 | [LOGDIR='${localstatedir}/log/${PACKAGE}']) | |
155 | AC_SUBST([LOGDIR])]) | |
156 | ||
f973f2af BP |
157 | dnl Checks for the directory in which to store the Open vSwitch database. |
158 | AC_DEFUN([OVS_CHECK_DBDIR], | |
159 | [AC_ARG_WITH( | |
160 | [dbdir], | |
161 | AC_HELP_STRING([--with-dbdir=DIR], | |
162 | [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]), | |
163 | [DBDIR=$withval], | |
164 | [DBDIR='${sysconfdir}/${PACKAGE}']) | |
165 | AC_SUBST([DBDIR])]) | |
166 | ||
92f75e60 | 167 | dnl Defines HAVE_BACKTRACE if backtrace() is found. |
0e6644c3 | 168 | AC_DEFUN([OVS_CHECK_BACKTRACE], |
3453ed24 YT |
169 | [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace], |
170 | [AC_DEFINE([HAVE_BACKTRACE], [1], | |
171 | [Define to 1 if you have backtrace(3).])])]) | |
0e6644c3 | 172 | |
064af421 BP |
173 | dnl Checks for __malloc_hook, etc., supported by glibc. |
174 | AC_DEFUN([OVS_CHECK_MALLOC_HOOKS], | |
175 | [AC_CACHE_CHECK( | |
176 | [whether libc supports hooks for malloc and related functions], | |
177 | [ovs_cv_malloc_hooks], | |
178 | [AC_COMPILE_IFELSE( | |
179 | [AC_LANG_PROGRAM( | |
180 | [#include <malloc.h> | |
2e22e1c7 | 181 | ], |
064af421 BP |
182 | [(void) __malloc_hook; |
183 | (void) __realloc_hook; | |
184 | (void) __free_hook;])], | |
185 | [ovs_cv_malloc_hooks=yes], | |
186 | [ovs_cv_malloc_hooks=no])]) | |
187 | if test $ovs_cv_malloc_hooks = yes; then | |
2e22e1c7 | 188 | AC_DEFINE([HAVE_MALLOC_HOOKS], [1], |
064af421 BP |
189 | [Define to 1 if you have __malloc_hook, __realloc_hook, and |
190 | __free_hook in <malloc.h>.]) | |
191 | fi]) | |
192 | ||
193 | dnl Checks for valgrind/valgrind.h. | |
2e22e1c7 | 194 | AC_DEFUN([OVS_CHECK_VALGRIND], |
064af421 BP |
195 | [AC_CHECK_HEADERS([valgrind/valgrind.h])]) |
196 | ||
3b135da3 BP |
197 | dnl Checks for Python 2.x, x >= 4. |
198 | AC_DEFUN([OVS_CHECK_PYTHON], | |
195b5c35 | 199 | [AC_CACHE_CHECK( |
3b135da3 BP |
200 | [for Python 2.x for x >= 4], |
201 | [ovs_cv_python], | |
202 | [if test -n "$PYTHON"; then | |
203 | ovs_cv_python=$PYTHON | |
204 | else | |
205 | ovs_cv_python=no | |
206 | for binary in python python2.4 python2.5; do | |
207 | ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR | |
208 | for dir in $PATH; do | |
209 | IFS=$ovs_save_IFS | |
210 | test -z "$dir" && dir=. | |
4a6ba437 | 211 | if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys |
3b135da3 BP |
212 | if sys.hexversion >= 0x02040000 and sys.hexversion < 0x03000000: |
213 | sys.exit(0) | |
214 | else: | |
215 | sys.exit(1)'; then | |
216 | ovs_cv_python=$dir/$binary | |
217 | break 2 | |
218 | fi | |
219 | done | |
220 | done | |
221 | fi]) | |
05b3c97b | 222 | AC_SUBST([HAVE_PYTHON]) |
195b5c35 BP |
223 | AM_MISSING_PROG([PYTHON], [python]) |
224 | if test $ovs_cv_python != no; then | |
225 | PYTHON=$ovs_cv_python | |
05b3c97b BP |
226 | HAVE_PYTHON=yes |
227 | else | |
228 | HAVE_PYTHON=no | |
229 | fi | |
230 | AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])]) | |
436f27dd | 231 | |
f8d739a9 BP |
232 | dnl Checks for dot. |
233 | AC_DEFUN([OVS_CHECK_DOT], | |
234 | [AC_CACHE_CHECK( | |
235 | [for dot], | |
236 | [ovs_cv_dot], | |
237 | [dnl "dot" writes -V output to stderr: | |
a5eef57e | 238 | if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then |
f8d739a9 BP |
239 | ovs_cv_dot=yes |
240 | else | |
241 | ovs_cv_dot=no | |
f8d739a9 | 242 | fi]) |
7c9b0073 | 243 | AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])]) |
f8d739a9 | 244 | |
436f27dd AS |
245 | dnl Checks for pyuic4. |
246 | AC_DEFUN([OVS_CHECK_PYUIC4], | |
247 | [AC_CACHE_CHECK( | |
248 | [for pyuic4], | |
249 | [ovs_cv_pyuic4], | |
250 | [if (pyuic4 --version) >/dev/null 2>&1; then | |
251 | ovs_cv_pyuic4=pyuic4 | |
252 | else | |
253 | ovs_cv_pyuic4=no | |
254 | fi]) | |
255 | AM_MISSING_PROG([PYUIC4], [pyuic4]) | |
256 | if test $ovs_cv_pyuic4 != no; then | |
257 | PYUIC4=$ovs_cv_pyuic4 | |
258 | fi]) | |
259 | ||
260 | dnl Checks whether $PYTHON supports the module given as $1 | |
261 | AC_DEFUN([OVS_CHECK_PYTHON_MODULE], | |
262 | [AC_REQUIRE([OVS_CHECK_PYTHON]) | |
263 | AC_CACHE_CHECK( | |
264 | [for $1 Python module], | |
265 | [ovs_cv_py_[]AS_TR_SH([$1])], | |
266 | [ovs_cv_py_[]AS_TR_SH([$1])=no | |
267 | if test $HAVE_PYTHON = yes; then | |
268 | AS_ECHO(["running $PYTHON -c 'import $1 | |
269 | import sys | |
1df624e6 | 270 | sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1 |
436f27dd AS |
271 | if $PYTHON -c 'import $1 |
272 | import sys | |
1df624e6 | 273 | sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then |
436f27dd AS |
274 | ovs_cv_py_[]AS_TR_SH([$1])=yes |
275 | fi | |
276 | fi])]) | |
277 | ||
278 | dnl Checks for Python modules needed by ovsdbmonitor. | |
279 | AC_DEFUN([OVS_CHECK_OVSDBMONITOR], | |
280 | [OVS_CHECK_PYTHON_MODULE([PySide.QtCore]) | |
281 | OVS_CHECK_PYTHON_MODULE([PyQt4.QtCore]) | |
282 | OVS_CHECK_PYTHON_MODULE([twisted.conch.ssh]) | |
283 | OVS_CHECK_PYTHON_MODULE([twisted.internet]) | |
284 | OVS_CHECK_PYTHON_MODULE([twisted.application]) | |
285 | OVS_CHECK_PYTHON_MODULE([json]) | |
286 | OVS_CHECK_PYTHON_MODULE([zope.interface]) | |
287 | if (test $ovs_cv_py_PySide_QtCore = yes \ | |
288 | || test $ovs_cv_py_PyQt4_QtCore = yes) \ | |
289 | && test $ovs_cv_py_twisted_conch_ssh = yes \ | |
290 | && test $ovs_cv_py_twisted_internet = yes \ | |
291 | && test $ovs_cv_py_twisted_application = yes \ | |
292 | && test $ovs_cv_py_json = yes \ | |
293 | && test $ovs_cv_py_zope_interface = yes; then | |
294 | BUILD_OVSDBMONITOR=yes | |
295 | else | |
296 | BUILD_OVSDBMONITOR=no | |
297 | fi | |
298 | AC_MSG_CHECKING([whether to build ovsdbmonitor]) | |
299 | AC_MSG_RESULT([$BUILD_OVSDBMONITOR]) | |
300 | AM_CONDITIONAL([BUILD_OVSDBMONITOR], [test $BUILD_OVSDBMONITOR = yes])]) | |
480ce8ab | 301 | |
9b4a5392 AA |
302 | dnl Checks for missing python modules at build time |
303 | AC_DEFUN([OVS_CHECK_PYTHON_COMPAT], | |
304 | [OVS_CHECK_PYTHON_MODULE([uuid]) | |
305 | if test $ovs_cv_py_uuid = yes; then | |
306 | INCLUDE_PYTHON_COMPAT=no | |
307 | else | |
308 | INCLUDE_PYTHON_COMPAT=yes | |
309 | fi | |
310 | AC_MSG_CHECKING([whether to add python/compat to PYTHONPATH]) | |
311 | AC_MSG_RESULT([$INCLUDE_PYTHON_COMPAT]) | |
312 | AM_CONDITIONAL([INCLUDE_PYTHON_COMPAT], [test $INCLUDE_PYTHON_COMPAT = yes])]) | |
313 | ||
0027492d BP |
314 | dnl Checks for groff. |
315 | AC_DEFUN([OVS_CHECK_GROFF], | |
316 | [AC_CACHE_CHECK( | |
317 | [for groff], | |
318 | [ovs_cv_groff], | |
319 | [if (groff -v) >/dev/null 2>&1; then | |
320 | ovs_cv_groff=yes | |
321 | else | |
322 | ovs_cv_groff=no | |
323 | fi]) | |
324 | AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])]) | |
c22095a5 BP |
325 | |
326 | dnl Checks for thread-local storage support. | |
327 | dnl | |
328 | dnl Checks whether the compiler and linker support the C11 | |
329 | dnl thread_local macro from <threads.h>, and if so defines | |
330 | dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker | |
331 | dnl support the GCC __thread extension, and if so defines | |
332 | dnl HAVE___THREAD. | |
333 | AC_DEFUN([OVS_CHECK_TLS], | |
334 | [AC_CACHE_CHECK( | |
335 | [whether $CC has <threads.h> that supports thread_local], | |
336 | [ovs_cv_thread_local], | |
337 | [AC_LINK_IFELSE( | |
338 | [AC_LANG_PROGRAM([#include <threads.h> | |
339 | static thread_local int var;], [return var;])], | |
340 | [ovs_cv_thread_local=yes], | |
341 | [ovs_cv_thread_local=no])]) | |
342 | if test $ovs_cv_thread_local = yes; then | |
343 | AC_DEFINE([HAVE_THREAD_LOCAL], [1], | |
344 | [Define to 1 if the C compiler and linker supports the C11 | |
345 | thread_local matcro defined in <threads.h>.]) | |
346 | else | |
347 | AC_CACHE_CHECK( | |
348 | [whether $CC supports __thread], | |
349 | [ovs_cv___thread], | |
350 | [AC_LINK_IFELSE( | |
351 | [AC_LANG_PROGRAM([static __thread int var;], [return var;])], | |
352 | [ovs_cv___thread=yes], | |
353 | [ovs_cv___thread=no])]) | |
354 | if test $ovs_cv___thread = yes; then | |
355 | AC_DEFINE([HAVE___THREAD], [1], | |
356 | [Define to 1 if the C compiler and linker supports the | |
357 | GCC __thread extenions.]) | |
358 | fi | |
359 | fi]) | |
31a3fc6e | 360 | |
fd2e50cd JP |
361 | dnl OVS_CHECK_ATOMIC_LIBS |
362 | dnl | |
363 | dnl Check to see if -latomic is need for GCC atomic built-ins. | |
364 | AC_DEFUN([OVS_CHECK_ATOMIC_LIBS], | |
365 | [AC_SEARCH_LIBS([__atomic_load_8], [atomic])]) | |
366 | ||
15248032 BP |
367 | dnl OVS_CHECK_GCC4_ATOMICS |
368 | dnl | |
369 | dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins. | |
370 | dnl A compile-time only check is not enough because the compiler defers | |
371 | dnl unimplemented built-ins to libgcc, which sometimes also lacks | |
372 | dnl implementations. | |
373 | AC_DEFUN([OVS_CHECK_GCC4_ATOMICS], | |
374 | [AC_CACHE_CHECK( | |
375 | [whether $CC supports GCC 4.0+ atomic built-ins], | |
376 | [ovs_cv_gcc4_atomics], | |
377 | [AC_LINK_IFELSE( | |
378 | [AC_LANG_PROGRAM([[#include <stdlib.h> | |
379 | ||
380 | #define ovs_assert(expr) if (!(expr)) abort(); | |
381 | #define TEST_ATOMIC_TYPE(TYPE) \ | |
382 | { \ | |
383 | TYPE x = 1; \ | |
384 | TYPE orig; \ | |
385 | \ | |
386 | __sync_synchronize(); \ | |
387 | ovs_assert(x == 1); \ | |
388 | \ | |
389 | __sync_synchronize(); \ | |
390 | x = 3; \ | |
391 | __sync_synchronize(); \ | |
392 | ovs_assert(x == 3); \ | |
393 | \ | |
394 | orig = __sync_fetch_and_add(&x, 1); \ | |
395 | ovs_assert(orig == 3); \ | |
396 | __sync_synchronize(); \ | |
397 | ovs_assert(x == 4); \ | |
398 | \ | |
399 | orig = __sync_fetch_and_sub(&x, 2); \ | |
400 | ovs_assert(orig == 4); \ | |
401 | __sync_synchronize(); \ | |
402 | ovs_assert(x == 2); \ | |
403 | \ | |
404 | orig = __sync_fetch_and_or(&x, 6); \ | |
405 | ovs_assert(orig == 2); \ | |
406 | __sync_synchronize(); \ | |
407 | ovs_assert(x == 6); \ | |
408 | \ | |
409 | orig = __sync_fetch_and_and(&x, 10); \ | |
410 | ovs_assert(orig == 6); \ | |
411 | __sync_synchronize(); \ | |
412 | ovs_assert(x == 2); \ | |
413 | \ | |
414 | orig = __sync_fetch_and_xor(&x, 10); \ | |
415 | ovs_assert(orig == 2); \ | |
416 | __sync_synchronize(); \ | |
417 | ovs_assert(x == 8); \ | |
418 | }]], [dnl | |
419 | TEST_ATOMIC_TYPE(char); | |
420 | TEST_ATOMIC_TYPE(unsigned char); | |
421 | TEST_ATOMIC_TYPE(signed char); | |
422 | TEST_ATOMIC_TYPE(short); | |
423 | TEST_ATOMIC_TYPE(unsigned short); | |
424 | TEST_ATOMIC_TYPE(int); | |
425 | TEST_ATOMIC_TYPE(unsigned int); | |
426 | TEST_ATOMIC_TYPE(long int); | |
427 | TEST_ATOMIC_TYPE(unsigned long int); | |
428 | TEST_ATOMIC_TYPE(long long int); | |
429 | TEST_ATOMIC_TYPE(unsigned long long int); | |
430 | ])], | |
431 | [ovs_cv_gcc4_atomics=yes], | |
432 | [ovs_cv_gcc4_atomics=no])]) | |
433 | if test $ovs_cv_gcc4_atomics = yes; then | |
434 | AC_DEFINE([HAVE_GCC4_ATOMICS], [1], | |
435 | [Define to 1 if the C compiler and linker supports the GCC 4.0+ | |
436 | atomic built-ins.]) | |
437 | fi]) | |
438 | ||
31a3fc6e BP |
439 | dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE) |
440 | dnl | |
441 | dnl Checks __atomic_always_lock_free(SIZE, 0) | |
442 | AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE], | |
443 | [AC_CACHE_CHECK( | |
444 | [value of __atomic_always_lock_free($1)], | |
445 | [ovs_cv_atomic_always_lock_free_$1], | |
446 | [AC_COMPUTE_INT( | |
447 | [ovs_cv_atomic_always_lock_free_$1], | |
448 | [__atomic_always_lock_free($1, 0)], | |
449 | [], | |
450 | [ovs_cv_atomic_always_lock_free_$1=unsupported])]) | |
451 | if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then | |
452 | AC_DEFINE_UNQUOTED( | |
453 | [ATOMIC_ALWAYS_LOCK_FREE_$1B], | |
454 | [$ovs_cv_atomic_always_lock_free_$1], | |
455 | [If the C compiler is GCC 4.7 or later, define to the return value of | |
456 | __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is | |
457 | an older version of GCC, the value does not matter.]) | |
458 | fi]) | |
97eba8fc BP |
459 | |
460 | dnl OVS_CHECK_POSIX_AIO | |
461 | AC_DEFUN([OVS_CHECK_POSIX_AIO], | |
462 | [AC_SEARCH_LIBS([aio_write], [rt]) | |
463 | AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])]) | |
ed1be787 BP |
464 | |
465 | dnl OVS_CHECK_INCLUDE_NEXT | |
466 | AC_DEFUN([OVS_CHECK_INCLUDE_NEXT], | |
467 | [AC_REQUIRE([gl_CHECK_NEXT_HEADERS]) | |
468 | gl_CHECK_NEXT_HEADERS([$1])]) |