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.
18 AC_DEFUN([OVS_ENABLE_WERROR],
21 [AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
22 [], [enable_Werror=no])
23 AC_CONFIG_COMMANDS_PRE(
24 [if test "X$enable_Werror" = Xyes; then
25 CFLAGS="$CFLAGS -Werror"
30 dnl Configure linux kernel source tree
31 AC_DEFUN([OVS_CHECK_LINUX], [
33 [AC_HELP_STRING([--with-linux=/path/to/linux],
34 [Specify the Linux kernel build directory])])
35 AC_ARG_WITH([linux-source],
36 [AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
37 [Specify the Linux kernel source directory
38 (usually figured out automatically from build
41 # Deprecated equivalents to --with-linux, --with-linux-source.
43 AC_ARG_WITH([l26-source])
45 if test X"$with_linux" != X; then
47 elif test X"$with_l26" != X; then
49 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
54 if test X"$KBUILD" != X; then
55 if test X"$with_linux_source" != X; then
56 KSRC=$with_linux_source
57 elif test X"$with_l26_source" != X; then
59 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
63 elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
64 AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
67 if test -n "$KBUILD"; then
68 KBUILD=`eval echo "$KBUILD"`
71 *) KBUILD=`pwd`/$KBUILD ;;
74 # The build directory is what the user provided.
75 # Make sure that it exists.
76 AC_MSG_CHECKING([for Linux build directory])
77 if test -d "$KBUILD"; then
78 AC_MSG_RESULT([$KBUILD])
82 AC_ERROR([source dir $KBUILD doesn't exist])
85 # Debian breaks kernel headers into "source" header and "build" headers.
86 # We want the source headers, but $KBUILD gives us the "build" headers.
87 # Use heuristics to find the source headers.
88 AC_MSG_CHECKING([for Linux source directory])
89 if test -n "$KSRC"; then
90 KSRC=`eval echo "$KSRC"`
93 *) KSRC=`pwd`/$KSRC ;;
95 if test ! -e $KSRC/include/linux/kernel.h; then
96 AC_MSG_ERROR([$KSRC is not a kernel source directory])
100 if test ! -e $KSRC/include/linux/kernel.h; then
101 # Debian kernel build Makefiles tend to include a line of the form:
102 # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
103 # First try to extract the source directory from this line.
104 KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
105 if test ! -e "$KSRC"/include/linux/kernel.h; then
106 # Didn't work. Fall back to name-based heuristics that used to work.
107 case `echo "$KBUILD" | sed 's,/*$,,'` in # (
109 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
112 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
117 if test ! -e "$KSRC"/include/linux/kernel.h; then
118 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
121 AC_MSG_RESULT([$KSRC])
123 AC_MSG_CHECKING([for kernel version])
124 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
125 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
126 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
127 if test X"$version" = X || test X"$patchlevel" = X; then
128 AC_ERROR([cannot determine kernel version])
129 elif test X"$sublevel" = X; then
130 kversion=$version.$patchlevel
132 kversion=$version.$patchlevel.$sublevel
134 AC_MSG_RESULT([$kversion])
136 if test "$version" -ge 3; then
137 if test "$version" = 3 && test "$patchlevel" -le 14; then
140 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 3.14.x is not supported (please refer to the FAQ for advice)])
143 if test "$version" -le 1 || test "$patchlevel" -le 5 || test "$sublevel" -le 31; then
144 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 2.6.32 or later is required])
149 if (test ! -e "$KBUILD"/include/linux/version.h && \
150 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
151 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
152 test ! -e "$KBUILD"/include/generated/autoconf.h); then
153 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
155 OVS_CHECK_LINUX_COMPAT
157 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
162 dnl Configure DPDK source tree
163 AC_DEFUN([OVS_CHECK_DPDK], [
165 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
166 [Specify the DPDK build directory])])
168 if test X"$with_dpdk" != X; then
171 DPDK_INCLUDE=$RTE_SDK/include
172 DPDK_LIB_DIR=$RTE_SDK/lib
173 DPDK_LIB=-lintel_dpdk
175 LDFLAGS="$LDFLAGS -L$DPDK_LIB_DIR"
176 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
178 # On some systems we have to add -ldl to link with dpdk
180 # This code, at first, tries to link without -ldl (""),
181 # then adds it and tries again.
182 # Before each attempt the search cache must be unset,
183 # otherwise autoconf will stick with the old result
187 for extras in "" "-ldl"; do
188 LIBS="$DPDK_LIB $extras $save_LIBS"
190 [AC_LANG_PROGRAM([#include <rte_config.h>
191 #include <rte_eal.h>],
192 [int rte_argc; char ** rte_argv;
193 rte_eal_init(rte_argc, rte_argv);])],
199 if $found; then :; else
200 AC_MSG_ERROR([cannot link with dpdk])
203 # DPDK 1.7.0 pmd drivers are not linked unless --whole-archive is used.
205 # This happens because the rest of the DPDK code doesn't use any symbol in
206 # the pmd driver objects, and the drivers register themselves using an
207 # __attribute__((constructor)) function.
209 # These options are specified inside a single -Wl directive to prevent
210 # autotools from reordering them.
211 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
212 AC_SUBST([DPDK_vswitchd_LDFLAGS])
213 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
218 AM_CONDITIONAL([DPDK_NETDEV], test -n "$RTE_SDK")
221 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
223 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
224 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
225 dnl <REGEX> translated to uppercase.
226 AC_DEFUN([OVS_GREP_IFELSE], [
227 AC_MSG_CHECKING([whether $2 matches in $1])
229 grep '$2' $1 >/dev/null 2>&1
234 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
241 AC_MSG_ERROR([grep exited with status $status])
245 AC_MSG_RESULT([file not found])
252 dnl Defines NAME to 1 in kcompat.h.
253 AC_DEFUN([OVS_DEFINE], [
254 echo '#define $1 1' >> datapath/linux/kcompat.h.new
257 AC_DEFUN([OVS_CHECK_LOG2_H], [
258 AC_MSG_CHECKING([for $KSRC/include/linux/log2.h])
259 if test -e $KSRC/include/linux/log2.h; then
261 OVS_DEFINE([HAVE_LOG2_H])
267 dnl OVS_CHECK_LINUX_COMPAT
269 dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
270 dnl the directory in $KBUILD.
271 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
272 rm -f datapath/linux/kcompat.h.new
273 mkdir -p datapath/linux
274 : > datapath/linux/kcompat.h.new
276 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
277 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
279 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
281 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
282 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
284 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
286 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
288 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
289 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
290 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
291 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
292 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
293 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
294 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats])
296 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
298 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
299 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
300 [rcu_read_lock_held])])
301 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
303 # Check for the proto_data_valid member in struct sk_buff. The [^@]
304 # is necessary because some versions of this header remove the
305 # member but retain the kerneldoc comment that describes it (which
306 # starts with @). The brackets must be doubled because of m4
308 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
309 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
310 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
311 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
312 [OVS_DEFINE([HAVE_U16_RXHASH])])
313 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
314 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
315 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
316 [skb_copy_from_linear_data_offset])
317 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
318 [skb_reset_tail_pointer])
319 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
320 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
321 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
322 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
323 [OVS_DEFINE([HAVE_ICMP6_HDR])])
324 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
325 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
326 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
327 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
328 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
329 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
330 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
331 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
332 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
333 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
334 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
335 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [l4_rxhash])
337 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
338 [OVS_DEFINE([HAVE_BOOL_TYPE])])
339 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
340 [OVS_DEFINE([HAVE_CSUM_TYPES])])
341 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
342 [OVS_DEFINE([HAVE_CSUM_TYPES])])
344 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
345 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
347 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
348 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
349 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
350 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
351 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
352 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
353 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
355 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
357 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
358 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
360 OVS_GREP_IFELSE([$KSRC/include/linux/percpu.h], [this_cpu_ptr])
362 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
364 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
365 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
369 if cmp -s datapath/linux/kcompat.h.new \
370 datapath/linux/kcompat.h >/dev/null 2>&1; then
371 rm datapath/linux/kcompat.h.new
373 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
377 dnl Checks for net/if_packet.h.
378 AC_DEFUN([OVS_CHECK_IF_PACKET],
379 [AC_CHECK_HEADER([net/if_packet.h],
380 [HAVE_IF_PACKET=yes],
382 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
383 if test "$HAVE_IF_PACKET" = yes; then
384 AC_DEFINE([HAVE_IF_PACKET], [1],
385 [Define to 1 if net/if_packet.h is available.])
388 dnl Checks for net/if_dl.h.
390 dnl (We use this as a proxy for checking whether we're building on FreeBSD
392 AC_DEFUN([OVS_CHECK_IF_DL],
393 [AC_CHECK_HEADER([net/if_dl.h],
396 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
397 if test "$HAVE_IF_DL" = yes; then
398 AC_DEFINE([HAVE_IF_DL], [1],
399 [Define to 1 if net/if_dl.h is available.])
401 # On these platforms we use libpcap to access network devices.
402 AC_SEARCH_LIBS([pcap_open_live], [pcap])
405 dnl Checks for buggy strtok_r.
407 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
408 dnl with optimization that can cause segfaults:
410 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
411 AC_DEFUN([OVS_CHECK_STRTOK_R],
413 [whether strtok_r macro segfaults on some inputs],
414 [ovs_cv_strtok_r_bug],
416 [AC_LANG_PROGRAM([#include <stdio.h>
419 [[char string[] = ":::";
420 char *save_ptr = (char *) 0xc0ffee;
421 char *token1, *token2;
422 token1 = strtok_r(string, ":", &save_ptr);
423 token2 = strtok_r(NULL, ":", &save_ptr);
424 freopen ("/dev/null", "w", stdout);
425 printf ("%s %s\n", token1, token2);
428 [ovs_cv_strtok_r_bug=no],
429 [ovs_cv_strtok_r_bug=yes],
430 [ovs_cv_strtok_r_bug=yes])])
431 if test $ovs_cv_strtok_r_bug = yes; then
432 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
433 [Define if strtok_r macro segfaults on some inputs])
437 dnl ----------------------------------------------------------------------
438 dnl These macros are from GNU PSPP, with the following original license:
439 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
440 dnl This file is free software; the Free Software Foundation
441 dnl gives unlimited permission to copy and/or distribute it,
442 dnl with or without modifications, as long as this notice is preserved.
444 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
445 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
446 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
447 [ovs_save_CFLAGS="$CFLAGS"
448 dnl Include -Werror in the compiler options, because without -Werror
449 dnl clang's GCC-compatible compiler driver does not return a failure
450 dnl exit status even though it complains about options it does not
452 CFLAGS="$CFLAGS $WERROR $1"
453 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no])
454 CFLAGS="$ovs_save_CFLAGS"])
455 if test $ovs_cv_name = yes; then
456 m4_if([$2], [], [:], [$2])
458 m4_if([$3], [], [:], [$3])
464 dnl Check whether the C compiler accepts -Werror.
465 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
466 AC_DEFUN([OVS_CHECK_WERROR],
468 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
470 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
471 dnl Check whether the given C compiler OPTION is accepted.
472 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
473 AC_DEFUN([OVS_CHECK_CC_OPTION],
474 [AC_REQUIRE([OVS_CHECK_WERROR])
475 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
477 dnl OVS_ENABLE_OPTION([OPTION])
478 dnl Check whether the given C compiler OPTION is accepted.
479 dnl If so, add it to WARNING_FLAGS.
480 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
481 AC_DEFUN([OVS_ENABLE_OPTION],
482 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
483 AC_SUBST([WARNING_FLAGS])])
485 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
486 dnl Check whether the given C compiler OPTION is accepted.
487 dnl If so, enable the given Automake CONDITIONAL.
489 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
490 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
491 [OVS_CHECK_CC_OPTION(
492 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
493 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
494 dnl ----------------------------------------------------------------------
496 dnl Check for too-old XenServer.
497 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
498 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
499 [if test -e /etc/redhat-release; then
500 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
502 if test -z "$ovs_cv_xsversion"; then
503 ovs_cv_xsversion=none
505 case $ovs_cv_xsversion in
509 [[1-9]][[0-9]]* | dnl XenServer 10 or later
510 [[6-9]]* | dnl XenServer 6 or later
511 5.[[7-9]]* | dnl XenServer 5.7 or later
512 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
513 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
514 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
518 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
522 dnl OVS_MAKE_HAS_IF([if-true], [if-false])
524 dnl Checks whether make has the GNU make $(if condition,then,else) extension.
525 dnl Runs 'if-true' if so, 'if-false' otherwise.
526 AC_DEFUN([OVS_CHECK_MAKE_IF],
528 [whether ${MAKE-make} has GNU make \$(if) extension],
529 [ovs_cv_gnu_make_if],
530 [cat <<'EOF' > conftest.mk
532 echo $(if x,y,z) > conftest.out
536 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
537 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
538 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
539 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
540 result=`cat conftest.out`
541 rm -f conftest.mk conftest.out
542 if test "X$result" = "Xy"; then
543 ovs_cv_gnu_make_if=yes
545 ovs_cv_gnu_make_if=no
548 dnl OVS_CHECK_GNU_MAKE
550 dnl Checks whether make is GNU make (because Linux kernel Makefiles
551 dnl only work with GNU make).
552 AC_DEFUN([OVS_CHECK_GNU_MAKE],
554 [whether ${MAKE-make} is GNU make],
557 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
558 ${MAKE-make} --version >conftest.out 2>&1
559 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
560 result=`cat conftest.out`
561 rm -f conftest.mk conftest.out
564 GNU*) ovs_cv_gnu_make=yes ;; # (
565 *) ovs_cv_gnu_make=no ;;
567 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
569 dnl OVS_CHECK_SPARSE_TARGET
571 dnl The "cgcc" script from "sparse" isn't very good at detecting the
572 dnl target for which the code is being built. This helps it out.
573 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
575 [target hint for cgcc],
576 [ac_cv_sparse_target],
577 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
578 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
579 [x86_64-*], [ac_cv_sparse_target=x86_64],
580 [ac_cv_sparse_target=other])])
581 AS_CASE([$ac_cv_sparse_target],
582 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
583 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
584 [SPARSEFLAGS= CGCCFLAGS=])
585 AC_SUBST([SPARSEFLAGS])
586 AC_SUBST([CGCCFLAGS])])
588 dnl OVS_SPARSE_EXTRA_INCLUDES
590 dnl The cgcc script from "sparse" does not search gcc's default
591 dnl search path. Get the default search path from GCC and pass
593 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
594 AC_SUBST([SPARSE_EXTRA_INCLUDES],
595 [`$CC -v -E - </dev/null 2>&1 >/dev/null | sed -n -e '/^#include.*search.*starts.*here:/,/^End.*of.*search.*list\./s/^ \(.*\)/-I \1/p' |grep -v /usr/lib | grep -x -v '\-I /usr/include' | tr \\\n ' ' `] ))
597 dnl OVS_ENABLE_SPARSE
598 AC_DEFUN([OVS_ENABLE_SPARSE],
599 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
600 AC_REQUIRE([OVS_CHECK_MAKE_IF])
601 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
604 AC_CONFIG_COMMANDS_PRE(
605 [if test $ovs_cv_gnu_make_if = yes; then
606 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
609 dnl OVS_PTHREAD_SET_NAME
611 dnl This checks for three known variants of pthreads functions for setting
612 dnl the name of the current thread:
614 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
615 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
616 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
618 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
619 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
622 dnl This macro defines:
624 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
625 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
626 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
627 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
628 [AC_CHECK_FUNCS([pthread_set_name_np])
629 if test $ac_cv_func_pthread_set_name_np != yes; then
631 [for pthread_setname_np() variant],
632 [ovs_cv_pthread_setname_np],
634 [AC_LANG_PROGRAM([#include <pthread.h>
635 ], [pthread_setname_np(pthread_self(), "name");])],
636 [ovs_cv_pthread_setname_np=glibc],
638 [AC_LANG_PROGRAM([#include <pthread.h>
639 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
640 [ovs_cv_pthread_setname_np=netbsd],
641 [ovs_cv_pthread_setname_np=none])])])
642 case $ovs_cv_pthread_setname_np in # (
645 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
646 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
650 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
651 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
656 dnl OVS_CHECK_LINUX_HOST.
658 dnl Checks whether we're building for a Linux host, based on the presence of
659 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
660 dnl LINUX based on the result.
661 AC_DEFUN([OVS_CHECK_LINUX_HOST],
663 [whether __linux__ is defined],
666 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
668 [ovs_cv_linux=false])])
669 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])