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"
28 # Unless --enable-Werror is specified, report but do not fail the build
29 # for errors reported by flake8.
30 if test "X$enable_Werror" = Xyes; then
35 AC_SUBST([FLAKE8_WERROR])])
39 dnl Configure linux kernel source tree
40 AC_DEFUN([OVS_CHECK_LINUX], [
42 [AC_HELP_STRING([--with-linux=/path/to/linux],
43 [Specify the Linux kernel build directory])])
44 AC_ARG_WITH([linux-source],
45 [AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
46 [Specify the Linux kernel source directory
47 (usually figured out automatically from build
50 # Deprecated equivalents to --with-linux, --with-linux-source.
52 AC_ARG_WITH([l26-source])
54 if test X"$with_linux" != X; then
56 elif test X"$with_l26" != X; then
58 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
63 if test X"$KBUILD" != X; then
64 if test X"$with_linux_source" != X; then
65 KSRC=$with_linux_source
66 elif test X"$with_l26_source" != X; then
68 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
72 elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
73 AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
76 if test -n "$KBUILD"; then
77 KBUILD=`eval echo "$KBUILD"`
80 *) KBUILD=`pwd`/$KBUILD ;;
83 # The build directory is what the user provided.
84 # Make sure that it exists.
85 AC_MSG_CHECKING([for Linux build directory])
86 if test -d "$KBUILD"; then
87 AC_MSG_RESULT([$KBUILD])
91 AC_ERROR([source dir $KBUILD doesn't exist])
94 # Debian breaks kernel headers into "source" header and "build" headers.
95 # We want the source headers, but $KBUILD gives us the "build" headers.
96 # Use heuristics to find the source headers.
97 AC_MSG_CHECKING([for Linux source directory])
98 if test -n "$KSRC"; then
99 KSRC=`eval echo "$KSRC"`
102 *) KSRC=`pwd`/$KSRC ;;
104 if test ! -e $KSRC/include/linux/kernel.h; then
105 AC_MSG_ERROR([$KSRC is not a kernel source directory])
109 if test ! -e $KSRC/include/linux/kernel.h; then
110 # Debian kernel build Makefiles tend to include a line of the form:
111 # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
112 # First try to extract the source directory from this line.
113 KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
114 if test ! -e "$KSRC"/include/linux/kernel.h; then
115 # Didn't work. Fall back to name-based heuristics that used to work.
116 case `echo "$KBUILD" | sed 's,/*$,,'` in # (
118 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
121 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
126 if test ! -e "$KSRC"/include/linux/kernel.h; then
127 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
130 AC_MSG_RESULT([$KSRC])
132 AC_MSG_CHECKING([for kernel version])
133 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
134 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
135 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
136 if test X"$version" = X || test X"$patchlevel" = X; then
137 AC_ERROR([cannot determine kernel version])
138 elif test X"$sublevel" = X; then
139 kversion=$version.$patchlevel
141 kversion=$version.$patchlevel.$sublevel
143 AC_MSG_RESULT([$kversion])
145 if test "$version" -ge 4; then
146 if test "$version" = 4 && test "$patchlevel" -le 12; then
149 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.11.x is not supported (please refer to the FAQ for advice)])
151 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
154 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
156 if (test ! -e "$KBUILD"/include/linux/version.h && \
157 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
158 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
159 test ! -e "$KBUILD"/include/generated/autoconf.h); then
160 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
162 OVS_CHECK_LINUX_COMPAT
164 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
167 dnl OVS_CHECK_LINUX_TC
169 dnl Configure Linux tc compat.
170 AC_DEFUN([OVS_CHECK_LINUX_TC], [
172 AC_LANG_PROGRAM([#include <linux/pkt_cls.h>], [
173 int x = TCA_ACT_COOKIE;
175 [AC_DEFINE([HAVE_TCA_ACT_COOKIE], [1],
176 [Define to 1 if TCA_ACT_COOKIE is avaiable.])])
179 AC_LANG_PROGRAM([#include <linux/tc_act/tc_vlan.h>], [
180 int x = TCA_VLAN_PUSH_VLAN_PRIORITY;
182 [AC_DEFINE([HAVE_TCA_VLAN_PUSH_VLAN_PRIORITY], [1],
183 [Define to 1 if TCA_VLAN_PUSH_VLAN_PRIORITY is avaiable.])])
186 AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
187 int x = TCA_TUNNEL_KEY_ENC_DST_PORT;
189 [AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_DST_PORT], [1],
190 [Define to 1 if TCA_TUNNEL_KEY_ENC_DST_PORT is avaiable.])])
195 dnl Configure DPDK source tree
196 AC_DEFUN([OVS_CHECK_DPDK], [
198 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
199 [Specify the DPDK build directory])],
202 AC_MSG_CHECKING([whether dpdk datapath is enabled])
203 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
210 DPDK_AUTO_DISCOVER="true"
211 DPDK_INCLUDE="/usr/local/include/dpdk -I/usr/include/dpdk"
214 DPDK_AUTO_DISCOVER="false"
215 DPDK_INCLUDE="$with_dpdk/include"
216 # If 'with_dpdk' is passed install directory, point to headers
217 # installed in $DESTDIR/$prefix/include/dpdk
218 if test ! -e "$DPDK_INCLUDE/rte_config.h" && \
219 test -e "$DPDK_INCLUDE/dpdk/rte_config.h"; then
220 DPDK_INCLUDE=$DPDK_INCLUDE/dpdk
222 DPDK_LIB_DIR="$with_dpdk/lib"
229 ovs_save_CFLAGS="$CFLAGS"
230 ovs_save_LDFLAGS="$LDFLAGS"
231 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
232 if test "$DPDK_AUTO_DISCOVER" = "false"; then
233 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
239 #include <rte_config.h>
240 #if RTE_LIBRTE_VHOST_NUMA
245 [AC_SEARCH_LIBS([get_mempolicy],[numa],[],[AC_MSG_ERROR([unable to find libnuma, install the dependency package])])
246 DPDK_EXTRA_LIB="-lnuma"
247 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])])
252 #include <rte_config.h>
253 #if RTE_LIBRTE_PMD_PCAP
258 [AC_SEARCH_LIBS([pcap_dump],[pcap],[],[AC_MSG_ERROR([unable to find libpcap, install the dependency package])])
259 DPDK_EXTRA_LIB="-lpcap"
263 #include <rte_config.h>
269 [AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])])
272 # On some systems we have to add -ldl to link with dpdk
274 # This code, at first, tries to link without -ldl (""),
275 # then adds it and tries again.
276 # Before each attempt the search cache must be unset,
277 # otherwise autoconf will stick with the old result
281 for extras in "" "-ldl"; do
282 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
284 [AC_LANG_PROGRAM([#include <rte_config.h>
285 #include <rte_eal.h>],
286 [int rte_argc; char ** rte_argv;
287 rte_eal_init(rte_argc, rte_argv);])],
288 [DPDKLIB_FOUND=true])
289 if $DPDKLIB_FOUND; then
294 # If linking unsuccessful
295 if test "$DPDKLIB_FOUND" = "false" ; then
296 if $DPDK_AUTO_DISCOVER; then
297 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])
299 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
302 CFLAGS="$ovs_save_CFLAGS"
303 LDFLAGS="$ovs_save_LDFLAGS"
304 if test "$DPDK_AUTO_DISCOVER" = "false"; then
305 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
307 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE"
308 OVS_ENABLE_OPTION([-mssse3])
310 # DPDK pmd drivers are not linked unless --whole-archive is used.
312 # This happens because the rest of the DPDK code doesn't use any symbol in
313 # the pmd driver objects, and the drivers register themselves using an
314 # __attribute__((constructor)) function.
316 # These options are specified inside a single -Wl directive to prevent
317 # autotools from reordering them.
318 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
319 AC_SUBST([DPDK_vswitchd_LDFLAGS])
320 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
323 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
326 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
328 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
329 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
330 dnl <REGEX> translated to uppercase.
331 AC_DEFUN([OVS_GREP_IFELSE], [
332 AC_MSG_CHECKING([whether $2 matches in $1])
334 grep '$2' $1 >/dev/null 2>&1
339 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
346 AC_MSG_ERROR([grep exited with status $status])
350 AC_MSG_RESULT([file not found])
355 dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
357 dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
358 dnl structure definition. If this is successful, runs IF-MATCH, otherwise
359 dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
360 dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
361 dnl translated to uppercase.
362 AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
363 AC_MSG_CHECKING([whether $2 has member $3 in $1])
365 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
370 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
377 AC_MSG_ERROR([grep exited with status $status])
381 AC_MSG_RESULT([file not found])
386 dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
388 dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
389 dnl the function signature starting from the line matching FUNCTION
390 dnl and ending with the line containing the closing parenthesis. If
391 dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
392 dnl IF-MATCH is empty then it defines to
393 dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
394 dnl <REGEX> translated to uppercase.
395 AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
396 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
398 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
403 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
410 AC_MSG_ERROR([grep exited with status $status])
414 AC_MSG_RESULT([file not found])
421 dnl Defines NAME to 1 in kcompat.h.
422 AC_DEFUN([OVS_DEFINE], [
423 echo '#define $1 1' >> datapath/linux/kcompat.h.new
426 dnl OVS_CHECK_LINUX_COMPAT
428 dnl Runs various Autoconf checks on the Linux kernel source in
429 dnl the directory in $KBUILD.
430 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
431 rm -f datapath/linux/kcompat.h.new
432 mkdir -p datapath/linux
433 : > datapath/linux/kcompat.h.new
435 echo '#include <linux/version.h>
436 #ifndef RHEL_RELEASE_CODE
437 #define RHEL_RELEASE_CODE 0
438 #define RHEL_RELEASE_VERSION(a, b) 0
439 #endif' >> datapath/linux/kcompat.h.new
441 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
442 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
444 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
445 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
446 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
448 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
449 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
450 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
452 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
453 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
455 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
456 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
457 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
458 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
459 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
461 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
462 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
463 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
464 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
465 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
466 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
468 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
469 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
470 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
471 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
472 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
473 [ip_do_fragment], [net],
474 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
475 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
476 [ip_local_out], [net],
477 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
479 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
481 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
482 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
483 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
484 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
485 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
486 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
487 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
488 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
489 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
490 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
492 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
494 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
496 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
497 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
498 [sub_frag_mem_limit], [struct.netns_frags],
499 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
500 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
501 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
502 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
503 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
505 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
506 dnl OVS does not really need ipv6 label field, but its presence signifies that
507 dnl the stack has all required ipv6 support.
508 dnl OVS also does not need dst_cache But this dependency allows us to write
509 dnl much cleaner code.
511 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
513 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
514 [iptunnel_pull_offloads],
515 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
516 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])
518 OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
519 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
520 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
521 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
522 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
523 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
524 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
525 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
526 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
527 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
528 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
529 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
530 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
531 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
532 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
533 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
534 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
535 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
536 dnl So check type of tstats.
537 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
538 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
539 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
540 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
541 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
542 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
543 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
544 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
545 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
546 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
547 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
549 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
550 [netdev_master_upper_dev_link], [upper_priv],
551 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
552 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
555 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
556 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
557 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
558 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
559 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
560 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
561 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
562 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
564 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
565 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
567 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
568 [nf_conn], [struct timer_list[[ \t]]*timeout],
569 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
570 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
571 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
573 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
574 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
575 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
576 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
577 [nf_ct_get_tuplepr], [struct.net],
578 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
579 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
581 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
582 [nf_ct_is_untracked])
583 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
585 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
587 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
588 [nf_connlabels_get], [int bit],
589 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
590 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
591 [nf_conn_labels], [words])
592 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
593 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
594 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
596 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
597 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
599 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
600 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
601 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
602 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
603 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
605 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
606 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
607 [rcu_read_lock_held])])
608 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
610 # Check for the proto_data_valid member in struct sk_buff. The [^@]
611 # is necessary because some versions of this header remove the
612 # member but retain the kerneldoc comment that describes it (which
613 # starts with @). The brackets must be doubled because of m4
615 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
616 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
617 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
618 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
619 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
620 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
621 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
622 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
623 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
624 [OVS_DEFINE([HAVE_U16_RXHASH])])
625 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
626 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
627 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
628 [skb_copy_from_linear_data_offset])
629 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
630 [skb_reset_tail_pointer])
631 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
632 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
633 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
634 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
635 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
636 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
637 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
638 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
639 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
640 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
641 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
642 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
643 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
644 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
645 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
646 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
647 [OVS_DEFINE([HAVE_L4_RXHASH])])
648 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
649 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
650 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
651 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
652 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
653 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
654 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
655 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
656 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
658 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
659 [OVS_DEFINE([HAVE_BOOL_TYPE])])
660 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
661 [OVS_DEFINE([HAVE_CSUM_TYPES])])
662 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
663 [OVS_DEFINE([HAVE_CSUM_TYPES])])
665 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
666 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
668 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
669 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
671 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
672 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
673 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
674 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
675 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
676 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
677 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
678 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
679 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
680 [genl_notify], [net],
681 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
684 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
685 [genl_multicast_group], [id])
686 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
688 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
689 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
690 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
691 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
692 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
693 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
694 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
695 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
696 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
698 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
699 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
700 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
701 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
702 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
703 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
704 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
705 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
706 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
707 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
708 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
709 [nla_parse], [netlink_ext_ack],
710 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
712 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
714 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
715 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
716 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
717 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
718 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
719 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
720 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
722 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
723 [metadata_dst_alloc], [metadata_type])
725 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
727 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
728 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
729 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
730 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
731 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
732 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
733 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
734 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
735 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
736 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
739 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
740 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
741 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
742 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
744 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
745 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
746 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
747 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
748 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
749 [udp_add_offload], [net],
750 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
751 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
752 [nf_defrag_ipv6_enable], [net],
753 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
754 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
755 [OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
756 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
758 [OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
759 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
760 [OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
761 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
762 [nf_conntrack_helper_put])
764 if cmp -s datapath/linux/kcompat.h.new \
765 datapath/linux/kcompat.h >/dev/null 2>&1; then
766 rm datapath/linux/kcompat.h.new
768 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
772 dnl Checks for net/if_packet.h.
773 AC_DEFUN([OVS_CHECK_IF_PACKET],
774 [AC_CHECK_HEADER([net/if_packet.h],
775 [HAVE_IF_PACKET=yes],
777 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
778 if test "$HAVE_IF_PACKET" = yes; then
779 AC_DEFINE([HAVE_IF_PACKET], [1],
780 [Define to 1 if net/if_packet.h is available.])
783 dnl Checks for net/if_dl.h.
785 dnl (We use this as a proxy for checking whether we're building on FreeBSD
787 AC_DEFUN([OVS_CHECK_IF_DL],
788 [AC_CHECK_HEADER([net/if_dl.h],
791 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
792 if test "$HAVE_IF_DL" = yes; then
793 AC_DEFINE([HAVE_IF_DL], [1],
794 [Define to 1 if net/if_dl.h is available.])
796 # On these platforms we use libpcap to access network devices.
797 AC_SEARCH_LIBS([pcap_open_live], [pcap])
800 dnl Checks for buggy strtok_r.
802 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
803 dnl with optimization that can cause segfaults:
805 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
806 AC_DEFUN([OVS_CHECK_STRTOK_R],
808 [whether strtok_r macro segfaults on some inputs],
809 [ovs_cv_strtok_r_bug],
811 [AC_LANG_PROGRAM([#include <stdio.h>
814 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
815 /* Assume bug is present, because relatively minor
816 changes in compiler settings (e.g. optimization
817 level) can make it crop up. */
820 char string[] = ":::";
821 char *save_ptr = (char *) 0xc0ffee;
822 char *token1, *token2;
823 token1 = strtok_r(string, ":", &save_ptr);
824 token2 = strtok_r(NULL, ":", &save_ptr);
825 freopen ("/dev/null", "w", stdout);
826 printf ("%s %s\n", token1, token2);
830 [ovs_cv_strtok_r_bug=no],
831 [ovs_cv_strtok_r_bug=yes],
832 [ovs_cv_strtok_r_bug=yes])])
833 if test $ovs_cv_strtok_r_bug = yes; then
834 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
835 [Define if strtok_r macro segfaults on some inputs])
839 dnl ----------------------------------------------------------------------
840 dnl These macros are from GNU PSPP, with the following original license:
841 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
842 dnl This file is free software; the Free Software Foundation
843 dnl gives unlimited permission to copy and/or distribute it,
844 dnl with or without modifications, as long as this notice is preserved.
846 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
847 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
848 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
849 [ovs_save_CFLAGS="$CFLAGS"
850 dnl Include -Werror in the compiler options, because without -Werror
851 dnl clang's GCC-compatible compiler driver does not return a failure
852 dnl exit status even though it complains about options it does not
855 dnl Also, check stderr as gcc exits with status 0 for options
856 dnl rejected at getopt level.
858 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
859 dnl gcc: unrecognized option '-Qunused-arguments'
862 CFLAGS="$CFLAGS $WERROR $1"
864 [AC_LANG_SOURCE([int x;])],
865 [if test -s conftest.err && grep "unrecognized option" conftest.err
872 CFLAGS="$ovs_save_CFLAGS"])
873 if test $ovs_cv_name = yes; then
874 m4_if([$2], [], [:], [$2])
876 m4_if([$3], [], [:], [$3])
882 dnl Check whether the C compiler accepts -Werror.
883 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
884 AC_DEFUN([OVS_CHECK_WERROR],
886 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
888 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
889 dnl Check whether the given C compiler OPTION is accepted.
890 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
891 AC_DEFUN([OVS_CHECK_CC_OPTION],
892 [AC_REQUIRE([OVS_CHECK_WERROR])
893 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
895 dnl OVS_ENABLE_OPTION([OPTION])
896 dnl Check whether the given C compiler OPTION is accepted.
897 dnl If so, add it to WARNING_FLAGS.
898 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
899 AC_DEFUN([OVS_ENABLE_OPTION],
900 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
901 AC_SUBST([WARNING_FLAGS])])
903 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
904 dnl Check whether the given C compiler OPTION is accepted.
905 dnl If so, enable the given Automake CONDITIONAL.
907 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
908 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
909 [OVS_CHECK_CC_OPTION(
910 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
911 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
912 dnl ----------------------------------------------------------------------
914 dnl Check for too-old XenServer.
915 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
916 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
917 [if test -e /etc/redhat-release; then
918 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
920 if test -z "$ovs_cv_xsversion"; then
921 ovs_cv_xsversion=none
923 case $ovs_cv_xsversion in
927 [[1-9]][[0-9]]* | dnl XenServer 10 or later
928 [[6-9]]* | dnl XenServer 6 or later
929 5.[[7-9]]* | dnl XenServer 5.7 or later
930 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
931 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
932 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
936 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
940 dnl OVS_CHECK_SPARSE_TARGET
942 dnl The "cgcc" script from "sparse" isn't very good at detecting the
943 dnl target for which the code is being built. This helps it out.
944 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
946 [target hint for cgcc],
947 [ac_cv_sparse_target],
948 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
949 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
950 [x86_64-*], [ac_cv_sparse_target=x86_64],
951 [ac_cv_sparse_target=other])])
952 AS_CASE([$ac_cv_sparse_target],
953 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
954 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
955 [SPARSEFLAGS= CGCCFLAGS=])
956 AC_SUBST([SPARSEFLAGS])
957 AC_SUBST([CGCCFLAGS])])
959 dnl OVS_SPARSE_EXTRA_INCLUDES
961 dnl The cgcc script from "sparse" does not search gcc's default
962 dnl search path. Get the default search path from GCC and pass
964 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
965 AC_SUBST([SPARSE_EXTRA_INCLUDES],
966 [`$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 ' ' `] ))
968 dnl OVS_ENABLE_SPARSE
969 AC_DEFUN([OVS_ENABLE_SPARSE],
970 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
971 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
974 AC_CONFIG_COMMANDS_PRE(
975 [CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])])
977 dnl OVS_CTAGS_IDENTIFIERS
979 dnl ctags ignores symbols with extras identifiers. This builds a list of
980 dnl specially handled identifiers to be ignored.
981 AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
982 AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
983 [`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${srcdir}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
985 dnl OVS_PTHREAD_SET_NAME
987 dnl This checks for three known variants of pthreads functions for setting
988 dnl the name of the current thread:
990 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
991 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
992 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
994 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
995 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
998 dnl This macro defines:
1000 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
1001 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
1002 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
1003 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
1004 [AC_CHECK_FUNCS([pthread_set_name_np])
1005 if test $ac_cv_func_pthread_set_name_np != yes; then
1007 [for pthread_setname_np() variant],
1008 [ovs_cv_pthread_setname_np],
1010 [AC_LANG_PROGRAM([#include <pthread.h>
1011 ], [pthread_setname_np(pthread_self(), "name");])],
1012 [ovs_cv_pthread_setname_np=glibc],
1014 [AC_LANG_PROGRAM([#include <pthread.h>
1015 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
1016 [ovs_cv_pthread_setname_np=netbsd],
1017 [ovs_cv_pthread_setname_np=none])])])
1018 case $ovs_cv_pthread_setname_np in # (
1021 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
1022 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
1026 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
1027 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
1032 dnl OVS_CHECK_LINUX_HOST.
1034 dnl Checks whether we're building for a Linux host, based on the presence of
1035 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
1036 dnl LINUX based on the result.
1037 AC_DEFUN([OVS_CHECK_LINUX_HOST],
1039 [whether __linux__ is defined],
1042 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
1043 [ovs_cv_linux=true],
1044 [ovs_cv_linux=false])])
1045 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])