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 11; then
140 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.11.x is not supported (please refer to the FAQ for advice)])
142 elif test "$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/net/mpls.h], [mpls_hdr],
483 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
484 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
485 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
486 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
487 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
488 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
489 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
490 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
491 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
492 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
493 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
494 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
495 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
496 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
497 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
498 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
499 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
500 dnl So check type of tstats.
501 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
502 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
503 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
504 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
505 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
506 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
507 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
508 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
509 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
510 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
512 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
513 [netdev_master_upper_dev_link], [upper_priv],
514 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
515 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
518 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
519 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
520 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
521 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
522 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
523 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
524 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
525 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
527 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
528 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
530 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
531 [nf_conn], [struct timer_list[[ \t]]*timeout],
532 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
533 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
534 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
536 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
537 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
538 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
539 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
540 [nf_ct_get_tuplepr], [struct.net],
541 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
542 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
544 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
545 [nf_ct_is_untracked])
546 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
548 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
550 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
551 [nf_connlabels_get], [int bit],
552 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
553 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
554 [nf_conn_labels], [words])
555 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
556 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
557 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
559 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
560 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
562 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
563 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
564 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
565 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
566 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
568 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
569 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
570 [rcu_read_lock_held])])
571 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
573 # Check for the proto_data_valid member in struct sk_buff. The [^@]
574 # is necessary because some versions of this header remove the
575 # member but retain the kerneldoc comment that describes it (which
576 # starts with @). The brackets must be doubled because of m4
578 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
579 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
580 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
581 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
582 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
583 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
584 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
585 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
586 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
587 [OVS_DEFINE([HAVE_U16_RXHASH])])
588 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
589 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
590 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
591 [skb_copy_from_linear_data_offset])
592 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
593 [skb_reset_tail_pointer])
594 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
595 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
596 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
597 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
598 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
599 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
600 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
601 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
602 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
603 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
604 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
605 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
606 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
607 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
608 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
609 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
610 [OVS_DEFINE([HAVE_L4_RXHASH])])
611 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
612 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
613 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
614 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
615 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
616 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
617 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
618 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
620 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
621 [OVS_DEFINE([HAVE_BOOL_TYPE])])
622 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
623 [OVS_DEFINE([HAVE_CSUM_TYPES])])
624 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
625 [OVS_DEFINE([HAVE_CSUM_TYPES])])
627 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
628 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
630 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
631 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
633 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
634 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
635 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
636 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
637 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
638 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
639 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
640 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
641 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
642 [genl_notify], [net],
643 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
646 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
647 [genl_multicast_group], [id])
648 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
650 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
651 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
652 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
653 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
654 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
655 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
656 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
657 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
658 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
660 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
661 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
662 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
663 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
664 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
665 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
666 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
667 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
668 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
669 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
670 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
671 [nla_parse], [netlink_ext_ack],
672 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
674 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
676 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
677 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
678 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
679 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
680 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
681 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
682 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
684 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
686 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
687 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
688 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
689 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
690 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
691 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
692 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
693 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
694 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
695 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
698 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
699 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
700 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
701 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
703 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
704 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
705 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
706 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
707 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
708 [udp_add_offload], [net],
709 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
710 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
711 [nf_defrag_ipv6_enable], [net],
712 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
714 if cmp -s datapath/linux/kcompat.h.new \
715 datapath/linux/kcompat.h >/dev/null 2>&1; then
716 rm datapath/linux/kcompat.h.new
718 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
722 dnl Checks for net/if_packet.h.
723 AC_DEFUN([OVS_CHECK_IF_PACKET],
724 [AC_CHECK_HEADER([net/if_packet.h],
725 [HAVE_IF_PACKET=yes],
727 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
728 if test "$HAVE_IF_PACKET" = yes; then
729 AC_DEFINE([HAVE_IF_PACKET], [1],
730 [Define to 1 if net/if_packet.h is available.])
733 dnl Checks for net/if_dl.h.
735 dnl (We use this as a proxy for checking whether we're building on FreeBSD
737 AC_DEFUN([OVS_CHECK_IF_DL],
738 [AC_CHECK_HEADER([net/if_dl.h],
741 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
742 if test "$HAVE_IF_DL" = yes; then
743 AC_DEFINE([HAVE_IF_DL], [1],
744 [Define to 1 if net/if_dl.h is available.])
746 # On these platforms we use libpcap to access network devices.
747 AC_SEARCH_LIBS([pcap_open_live], [pcap])
750 dnl Checks for buggy strtok_r.
752 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
753 dnl with optimization that can cause segfaults:
755 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
756 AC_DEFUN([OVS_CHECK_STRTOK_R],
758 [whether strtok_r macro segfaults on some inputs],
759 [ovs_cv_strtok_r_bug],
761 [AC_LANG_PROGRAM([#include <stdio.h>
764 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
765 /* Assume bug is present, because relatively minor
766 changes in compiler settings (e.g. optimization
767 level) can make it crop up. */
770 char string[] = ":::";
771 char *save_ptr = (char *) 0xc0ffee;
772 char *token1, *token2;
773 token1 = strtok_r(string, ":", &save_ptr);
774 token2 = strtok_r(NULL, ":", &save_ptr);
775 freopen ("/dev/null", "w", stdout);
776 printf ("%s %s\n", token1, token2);
780 [ovs_cv_strtok_r_bug=no],
781 [ovs_cv_strtok_r_bug=yes],
782 [ovs_cv_strtok_r_bug=yes])])
783 if test $ovs_cv_strtok_r_bug = yes; then
784 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
785 [Define if strtok_r macro segfaults on some inputs])
789 dnl ----------------------------------------------------------------------
790 dnl These macros are from GNU PSPP, with the following original license:
791 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
792 dnl This file is free software; the Free Software Foundation
793 dnl gives unlimited permission to copy and/or distribute it,
794 dnl with or without modifications, as long as this notice is preserved.
796 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
797 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
798 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
799 [ovs_save_CFLAGS="$CFLAGS"
800 dnl Include -Werror in the compiler options, because without -Werror
801 dnl clang's GCC-compatible compiler driver does not return a failure
802 dnl exit status even though it complains about options it does not
805 dnl Also, check stderr as gcc exits with status 0 for options
806 dnl rejected at getopt level.
808 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
809 dnl gcc: unrecognized option '-Qunused-arguments'
812 CFLAGS="$CFLAGS $WERROR $1"
814 [AC_LANG_SOURCE([int x;])],
815 [if test -s conftest.err && grep "unrecognized option" conftest.err
822 CFLAGS="$ovs_save_CFLAGS"])
823 if test $ovs_cv_name = yes; then
824 m4_if([$2], [], [:], [$2])
826 m4_if([$3], [], [:], [$3])
832 dnl Check whether the C compiler accepts -Werror.
833 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
834 AC_DEFUN([OVS_CHECK_WERROR],
836 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
838 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
839 dnl Check whether the given C compiler OPTION is accepted.
840 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
841 AC_DEFUN([OVS_CHECK_CC_OPTION],
842 [AC_REQUIRE([OVS_CHECK_WERROR])
843 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
845 dnl OVS_ENABLE_OPTION([OPTION])
846 dnl Check whether the given C compiler OPTION is accepted.
847 dnl If so, add it to WARNING_FLAGS.
848 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
849 AC_DEFUN([OVS_ENABLE_OPTION],
850 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
851 AC_SUBST([WARNING_FLAGS])])
853 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
854 dnl Check whether the given C compiler OPTION is accepted.
855 dnl If so, enable the given Automake CONDITIONAL.
857 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
858 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
859 [OVS_CHECK_CC_OPTION(
860 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
861 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
862 dnl ----------------------------------------------------------------------
864 dnl Check for too-old XenServer.
865 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
866 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
867 [if test -e /etc/redhat-release; then
868 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
870 if test -z "$ovs_cv_xsversion"; then
871 ovs_cv_xsversion=none
873 case $ovs_cv_xsversion in
877 [[1-9]][[0-9]]* | dnl XenServer 10 or later
878 [[6-9]]* | dnl XenServer 6 or later
879 5.[[7-9]]* | dnl XenServer 5.7 or later
880 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
881 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
882 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
886 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
890 dnl OVS_CHECK_SPARSE_TARGET
892 dnl The "cgcc" script from "sparse" isn't very good at detecting the
893 dnl target for which the code is being built. This helps it out.
894 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
896 [target hint for cgcc],
897 [ac_cv_sparse_target],
898 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
899 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
900 [x86_64-*], [ac_cv_sparse_target=x86_64],
901 [ac_cv_sparse_target=other])])
902 AS_CASE([$ac_cv_sparse_target],
903 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
904 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
905 [SPARSEFLAGS= CGCCFLAGS=])
906 AC_SUBST([SPARSEFLAGS])
907 AC_SUBST([CGCCFLAGS])])
909 dnl OVS_SPARSE_EXTRA_INCLUDES
911 dnl The cgcc script from "sparse" does not search gcc's default
912 dnl search path. Get the default search path from GCC and pass
914 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
915 AC_SUBST([SPARSE_EXTRA_INCLUDES],
916 [`$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 ' ' `] ))
918 dnl OVS_ENABLE_SPARSE
919 AC_DEFUN([OVS_ENABLE_SPARSE],
920 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
921 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
924 AC_CONFIG_COMMANDS_PRE(
925 [CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])])
927 dnl OVS_PTHREAD_SET_NAME
929 dnl This checks for three known variants of pthreads functions for setting
930 dnl the name of the current thread:
932 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
933 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
934 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
936 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
937 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
940 dnl This macro defines:
942 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
943 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
944 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
945 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
946 [AC_CHECK_FUNCS([pthread_set_name_np])
947 if test $ac_cv_func_pthread_set_name_np != yes; then
949 [for pthread_setname_np() variant],
950 [ovs_cv_pthread_setname_np],
952 [AC_LANG_PROGRAM([#include <pthread.h>
953 ], [pthread_setname_np(pthread_self(), "name");])],
954 [ovs_cv_pthread_setname_np=glibc],
956 [AC_LANG_PROGRAM([#include <pthread.h>
957 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
958 [ovs_cv_pthread_setname_np=netbsd],
959 [ovs_cv_pthread_setname_np=none])])])
960 case $ovs_cv_pthread_setname_np in # (
963 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
964 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
968 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
969 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
974 dnl OVS_CHECK_LINUX_HOST.
976 dnl Checks whether we're building for a Linux host, based on the presence of
977 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
978 dnl LINUX based on the result.
979 AC_DEFUN([OVS_CHECK_LINUX_HOST],
981 [whether __linux__ is defined],
984 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
986 [ovs_cv_linux=false])])
987 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])