3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 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$enable_Werror" = Xyes; then
25 OVS_CFLAGS="$OVS_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 "$version" -ge 4; then
137 if test "$version" = 4 && test "$patchlevel" -le 10; then
140 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.10.x is not supported (please refer to the FAQ for advice)])
142 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
145 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
147 if (test ! -e "$KBUILD"/include/linux/version.h && \
148 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
149 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
150 test ! -e "$KBUILD"/include/generated/autoconf.h); then
151 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
153 OVS_CHECK_LINUX_COMPAT
155 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
160 dnl Configure DPDK source tree
161 AC_DEFUN([OVS_CHECK_DPDK], [
163 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
164 [Specify the DPDK build directory])],
167 AC_MSG_CHECKING([whether dpdk datapath is enabled])
168 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
175 DPDK_AUTO_DISCOVER="true"
176 DPDK_INCLUDE="/usr/local/include/dpdk -I/usr/include/dpdk"
179 DPDK_AUTO_DISCOVER="false"
180 DPDK_INCLUDE="$with_dpdk/include"
181 # If 'with_dpdk' is passed install directory, point to headers
182 # installed in $DESTDIR/$prefix/include/dpdk
183 AC_CHECK_FILE([$DPDK_INCLUDE/rte_config.h], [],
184 [AC_CHECK_FILE([$DPDK_INCLUDE/dpdk/rte_config.h],
185 [DPDK_INCLUDE=$DPDK_INCLUDE/dpdk], [])])
186 DPDK_LIB_DIR="$with_dpdk/lib"
193 ovs_save_CFLAGS="$CFLAGS"
194 ovs_save_LDFLAGS="$LDFLAGS"
195 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
196 if test "$DPDK_AUTO_DISCOVER" = "false"; then
197 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
203 #include <rte_config.h>
204 #if RTE_LIBRTE_VHOST_NUMA
209 [AC_SEARCH_LIBS([get_mempolicy],[numa],[],[AC_MSG_ERROR([unable to find libnuma, install the dependency package])])
210 DPDK_EXTRA_LIB="-lnuma"
211 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])])
216 #include <rte_config.h>
217 #if RTE_LIBRTE_PMD_PCAP
222 [AC_SEARCH_LIBS([pcap_dump],[pcap],[],[AC_MSG_ERROR([unable to find libpcap, install the dependency package])])
223 DPDK_EXTRA_LIB="-lpcap"
227 #include <rte_config.h>
233 [AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])])
236 # On some systems we have to add -ldl to link with dpdk
238 # This code, at first, tries to link without -ldl (""),
239 # then adds it and tries again.
240 # Before each attempt the search cache must be unset,
241 # otherwise autoconf will stick with the old result
245 for extras in "" "-ldl"; do
246 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
248 [AC_LANG_PROGRAM([#include <rte_config.h>
249 #include <rte_eal.h>],
250 [int rte_argc; char ** rte_argv;
251 rte_eal_init(rte_argc, rte_argv);])],
252 [DPDKLIB_FOUND=true])
253 if $DPDKLIB_FOUND; then
258 # If linking unsuccessful
259 if test "$DPDKLIB_FOUND" = "false" ; then
260 if $DPDK_AUTO_DISCOVER; then
261 AC_MSG_ERROR([Could not find DPDK library in default search path, Use --with-dpdk to specify the DPDK library installed in non-standard location])
263 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
266 CFLAGS="$ovs_save_CFLAGS"
267 LDFLAGS="$ovs_save_LDFLAGS"
268 if test "$DPDK_AUTO_DISCOVER" = "false"; then
269 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
271 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE"
272 OVS_ENABLE_OPTION([-mssse3])
274 # DPDK pmd drivers are not linked unless --whole-archive is used.
276 # This happens because the rest of the DPDK code doesn't use any symbol in
277 # the pmd driver objects, and the drivers register themselves using an
278 # __attribute__((constructor)) function.
280 # These options are specified inside a single -Wl directive to prevent
281 # autotools from reordering them.
282 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
283 AC_SUBST([DPDK_vswitchd_LDFLAGS])
284 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
287 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
290 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
292 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
293 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
294 dnl <REGEX> translated to uppercase.
295 AC_DEFUN([OVS_GREP_IFELSE], [
296 AC_MSG_CHECKING([whether $2 matches in $1])
298 grep '$2' $1 >/dev/null 2>&1
303 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
310 AC_MSG_ERROR([grep exited with status $status])
314 AC_MSG_RESULT([file not found])
319 dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
321 dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
322 dnl structure definition. If this is successful, runs IF-MATCH, otherwise
323 dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
324 dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
325 dnl translated to uppercase.
326 AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
327 AC_MSG_CHECKING([whether $2 has member $3 in $1])
329 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
334 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
341 AC_MSG_ERROR([grep exited with status $status])
345 AC_MSG_RESULT([file not found])
350 dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
352 dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
353 dnl the function signature starting from the line matching FUNCTION
354 dnl and ending with the line containing the closing parenthesis. If
355 dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
356 dnl IF-MATCH is empty then it defines to
357 dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
358 dnl <REGEX> translated to uppercase.
359 AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
360 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
362 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
367 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
374 AC_MSG_ERROR([grep exited with status $status])
378 AC_MSG_RESULT([file not found])
385 dnl Defines NAME to 1 in kcompat.h.
386 AC_DEFUN([OVS_DEFINE], [
387 echo '#define $1 1' >> datapath/linux/kcompat.h.new
390 dnl OVS_CHECK_LINUX_COMPAT
392 dnl Runs various Autoconf checks on the Linux kernel source in
393 dnl the directory in $KBUILD.
394 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
395 rm -f datapath/linux/kcompat.h.new
396 mkdir -p datapath/linux
397 : > datapath/linux/kcompat.h.new
399 echo '#include <linux/version.h>
400 #ifndef RHEL_RELEASE_CODE
401 #define RHEL_RELEASE_CODE 0
402 #define RHEL_RELEASE_VERSION(a, b) 0
403 #endif' >> datapath/linux/kcompat.h.new
405 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
406 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
408 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
409 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
410 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
412 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
413 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
414 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
416 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
417 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
419 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
420 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
421 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
422 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
423 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
425 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
426 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
427 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
428 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
429 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
430 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
432 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
433 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
434 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
435 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
436 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
437 [ip_do_fragment], [net],
438 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
439 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
440 [ip_local_out], [net],
441 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
443 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
445 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
446 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
447 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
448 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
449 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
450 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
451 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
452 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
453 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
454 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
456 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
458 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
460 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
461 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
462 [sub_frag_mem_limit], [struct.netns_frags],
463 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
464 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
465 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
466 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
467 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
469 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
470 dnl OVS does not really need ipv6 label field, but its presence signifies that
471 dnl the stack has all required ipv6 support.
472 dnl OVS also does not need dst_cache But this dependency allows us to write
473 dnl much cleaner code.
475 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
477 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
478 [iptunnel_pull_offloads],
479 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
480 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])
482 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
483 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
484 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
485 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
486 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
487 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
488 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
489 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
490 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
491 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
492 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
493 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
494 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
495 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
496 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
497 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
498 dnl So check type of tstats.
499 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
500 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
501 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
502 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
503 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
504 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
505 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
506 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
507 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
508 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
510 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
511 [netdev_master_upper_dev_link], [upper_priv],
512 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
513 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
516 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
517 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
518 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
519 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
520 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
521 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
522 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
523 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
525 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
526 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
528 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
529 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
530 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
531 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
532 [nf_ct_get_tuplepr], [struct.net],
533 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
534 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
536 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
538 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
540 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
541 [nf_connlabels_get], [int bit],
542 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
543 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
544 [nf_conn_labels], [words])
545 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
546 [nf_ct_frag6_consume_orig])
547 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
548 [nf_ct_frag6_output])
549 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
550 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
551 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
553 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
554 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
556 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
557 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
558 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
559 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
560 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
562 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
563 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
564 [rcu_read_lock_held])])
565 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
567 # Check for the proto_data_valid member in struct sk_buff. The [^@]
568 # is necessary because some versions of this header remove the
569 # member but retain the kerneldoc comment that describes it (which
570 # starts with @). The brackets must be doubled because of m4
572 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
573 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
574 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
575 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
576 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
577 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
578 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
579 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
580 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
581 [OVS_DEFINE([HAVE_U16_RXHASH])])
582 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
583 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
584 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
585 [skb_copy_from_linear_data_offset])
586 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
587 [skb_reset_tail_pointer])
588 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
589 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
590 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
591 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
592 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
593 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
594 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
595 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
596 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
597 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
598 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
599 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
600 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
601 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
602 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
603 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
604 [OVS_DEFINE([HAVE_L4_RXHASH])])
605 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
606 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
607 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
608 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
609 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
610 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
611 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
612 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
614 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
615 [OVS_DEFINE([HAVE_BOOL_TYPE])])
616 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
617 [OVS_DEFINE([HAVE_CSUM_TYPES])])
618 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
619 [OVS_DEFINE([HAVE_CSUM_TYPES])])
621 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
622 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
624 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
625 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
627 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
628 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
629 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
630 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
631 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
632 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
633 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
634 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
635 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
636 [genl_notify], [net],
637 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
640 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
641 [genl_multicast_group], [id])
642 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
644 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
645 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
646 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
647 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
648 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
649 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
650 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
651 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
652 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
654 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
655 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
656 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
657 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
658 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
659 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
660 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
661 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
662 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
663 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
665 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
667 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
668 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
669 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
670 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
671 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
672 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
673 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
675 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
677 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
678 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
679 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
680 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
681 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
682 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
683 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
684 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
685 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
686 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
689 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
690 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
691 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
692 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
694 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
695 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
696 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
697 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
698 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
699 [udp_add_offload], [net],
700 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
703 if cmp -s datapath/linux/kcompat.h.new \
704 datapath/linux/kcompat.h >/dev/null 2>&1; then
705 rm datapath/linux/kcompat.h.new
707 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
711 dnl Checks for net/if_packet.h.
712 AC_DEFUN([OVS_CHECK_IF_PACKET],
713 [AC_CHECK_HEADER([net/if_packet.h],
714 [HAVE_IF_PACKET=yes],
716 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
717 if test "$HAVE_IF_PACKET" = yes; then
718 AC_DEFINE([HAVE_IF_PACKET], [1],
719 [Define to 1 if net/if_packet.h is available.])
722 dnl Checks for net/if_dl.h.
724 dnl (We use this as a proxy for checking whether we're building on FreeBSD
726 AC_DEFUN([OVS_CHECK_IF_DL],
727 [AC_CHECK_HEADER([net/if_dl.h],
730 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
731 if test "$HAVE_IF_DL" = yes; then
732 AC_DEFINE([HAVE_IF_DL], [1],
733 [Define to 1 if net/if_dl.h is available.])
735 # On these platforms we use libpcap to access network devices.
736 AC_SEARCH_LIBS([pcap_open_live], [pcap])
739 dnl Checks for buggy strtok_r.
741 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
742 dnl with optimization that can cause segfaults:
744 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
745 AC_DEFUN([OVS_CHECK_STRTOK_R],
747 [whether strtok_r macro segfaults on some inputs],
748 [ovs_cv_strtok_r_bug],
750 [AC_LANG_PROGRAM([#include <stdio.h>
753 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
754 /* Assume bug is present, because relatively minor
755 changes in compiler settings (e.g. optimization
756 level) can make it crop up. */
759 char string[] = ":::";
760 char *save_ptr = (char *) 0xc0ffee;
761 char *token1, *token2;
762 token1 = strtok_r(string, ":", &save_ptr);
763 token2 = strtok_r(NULL, ":", &save_ptr);
764 freopen ("/dev/null", "w", stdout);
765 printf ("%s %s\n", token1, token2);
769 [ovs_cv_strtok_r_bug=no],
770 [ovs_cv_strtok_r_bug=yes],
771 [ovs_cv_strtok_r_bug=yes])])
772 if test $ovs_cv_strtok_r_bug = yes; then
773 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
774 [Define if strtok_r macro segfaults on some inputs])
778 dnl ----------------------------------------------------------------------
779 dnl These macros are from GNU PSPP, with the following original license:
780 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
781 dnl This file is free software; the Free Software Foundation
782 dnl gives unlimited permission to copy and/or distribute it,
783 dnl with or without modifications, as long as this notice is preserved.
785 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
786 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
787 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
788 [ovs_save_CFLAGS="$CFLAGS"
789 dnl Include -Werror in the compiler options, because without -Werror
790 dnl clang's GCC-compatible compiler driver does not return a failure
791 dnl exit status even though it complains about options it does not
794 dnl Also, check stderr as gcc exits with status 0 for options
795 dnl rejected at getopt level.
797 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
798 dnl gcc: unrecognized option '-Qunused-arguments'
801 CFLAGS="$CFLAGS $WERROR $1"
803 [AC_LANG_SOURCE([int x;])],
804 [if test -s conftest.err && grep "unrecognized option" conftest.err
811 CFLAGS="$ovs_save_CFLAGS"])
812 if test $ovs_cv_name = yes; then
813 m4_if([$2], [], [:], [$2])
815 m4_if([$3], [], [:], [$3])
821 dnl Check whether the C compiler accepts -Werror.
822 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
823 AC_DEFUN([OVS_CHECK_WERROR],
825 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
827 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
828 dnl Check whether the given C compiler OPTION is accepted.
829 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
830 AC_DEFUN([OVS_CHECK_CC_OPTION],
831 [AC_REQUIRE([OVS_CHECK_WERROR])
832 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
834 dnl OVS_ENABLE_OPTION([OPTION])
835 dnl Check whether the given C compiler OPTION is accepted.
836 dnl If so, add it to WARNING_FLAGS.
837 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
838 AC_DEFUN([OVS_ENABLE_OPTION],
839 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
840 AC_SUBST([WARNING_FLAGS])])
842 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
843 dnl Check whether the given C compiler OPTION is accepted.
844 dnl If so, enable the given Automake CONDITIONAL.
846 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
847 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
848 [OVS_CHECK_CC_OPTION(
849 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
850 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
851 dnl ----------------------------------------------------------------------
853 dnl Check for too-old XenServer.
854 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
855 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
856 [if test -e /etc/redhat-release; then
857 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
859 if test -z "$ovs_cv_xsversion"; then
860 ovs_cv_xsversion=none
862 case $ovs_cv_xsversion in
866 [[1-9]][[0-9]]* | dnl XenServer 10 or later
867 [[6-9]]* | dnl XenServer 6 or later
868 5.[[7-9]]* | dnl XenServer 5.7 or later
869 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
870 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
871 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
875 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
879 dnl OVS_CHECK_SPARSE_TARGET
881 dnl The "cgcc" script from "sparse" isn't very good at detecting the
882 dnl target for which the code is being built. This helps it out.
883 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
885 [target hint for cgcc],
886 [ac_cv_sparse_target],
887 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
888 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
889 [x86_64-*], [ac_cv_sparse_target=x86_64],
890 [ac_cv_sparse_target=other])])
891 AS_CASE([$ac_cv_sparse_target],
892 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
893 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
894 [SPARSEFLAGS= CGCCFLAGS=])
895 AC_SUBST([SPARSEFLAGS])
896 AC_SUBST([CGCCFLAGS])])
898 dnl OVS_SPARSE_EXTRA_INCLUDES
900 dnl The cgcc script from "sparse" does not search gcc's default
901 dnl search path. Get the default search path from GCC and pass
903 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
904 AC_SUBST([SPARSE_EXTRA_INCLUDES],
905 [`$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 ' ' `] ))
907 dnl OVS_ENABLE_SPARSE
908 AC_DEFUN([OVS_ENABLE_SPARSE],
909 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
910 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
913 AC_CONFIG_COMMANDS_PRE(
914 [CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])])
916 dnl OVS_PTHREAD_SET_NAME
918 dnl This checks for three known variants of pthreads functions for setting
919 dnl the name of the current thread:
921 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
922 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
923 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
925 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
926 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
929 dnl This macro defines:
931 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
932 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
933 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
934 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
935 [AC_CHECK_FUNCS([pthread_set_name_np])
936 if test $ac_cv_func_pthread_set_name_np != yes; then
938 [for pthread_setname_np() variant],
939 [ovs_cv_pthread_setname_np],
941 [AC_LANG_PROGRAM([#include <pthread.h>
942 ], [pthread_setname_np(pthread_self(), "name");])],
943 [ovs_cv_pthread_setname_np=glibc],
945 [AC_LANG_PROGRAM([#include <pthread.h>
946 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
947 [ovs_cv_pthread_setname_np=netbsd],
948 [ovs_cv_pthread_setname_np=none])])])
949 case $ovs_cv_pthread_setname_np in # (
952 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
953 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
957 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
958 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
963 dnl OVS_CHECK_LINUX_HOST.
965 dnl Checks whether we're building for a Linux host, based on the presence of
966 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
967 dnl LINUX based on the result.
968 AC_DEFUN([OVS_CHECK_LINUX_HOST],
970 [whether __linux__ is defined],
973 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
975 [ovs_cv_linux=false])])
976 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])