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_FLOWER_KEY_IP_TTL_MASK;
175 [AC_DEFINE([HAVE_TCA_FLOWER_KEY_IP_TTL_MASK], [1],
176 [Define to 1 if TCA_FLOWER_KEY_IP_TTL_MASK 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 PKG_CHECK_MODULES([DPDK], [libdpdk],
212 [DPDK_INCLUDE="$DPDK_CFLAGS"],
213 [DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"])
216 DPDK_AUTO_DISCOVER="false"
217 DPDK_INCLUDE_PATH="$with_dpdk/include"
218 # If 'with_dpdk' is passed install directory, point to headers
219 # installed in $DESTDIR/$prefix/include/dpdk
220 if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
221 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
222 elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
223 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
225 DPDK_LIB_DIR="$with_dpdk/lib"
232 ovs_save_CFLAGS="$CFLAGS"
233 ovs_save_LDFLAGS="$LDFLAGS"
234 CFLAGS="$CFLAGS $DPDK_INCLUDE"
235 if test "$DPDK_AUTO_DISCOVER" = "false"; then
236 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
242 #include <rte_config.h>
243 #if RTE_LIBRTE_VHOST_NUMA
248 [AC_SEARCH_LIBS([get_mempolicy],[numa],[],[AC_MSG_ERROR([unable to find libnuma, install the dependency package])])
249 DPDK_EXTRA_LIB="-lnuma"
250 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])])
255 #include <rte_config.h>
256 #if RTE_LIBRTE_PMD_PCAP
261 [AC_SEARCH_LIBS([pcap_dump],[pcap],[],[AC_MSG_ERROR([unable to find libpcap, install the dependency package])])
262 DPDK_EXTRA_LIB="-lpcap"
266 #include <rte_config.h>
272 [AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])])
275 # On some systems we have to add -ldl to link with dpdk
277 # This code, at first, tries to link without -ldl (""),
278 # then adds it and tries again.
279 # Before each attempt the search cache must be unset,
280 # otherwise autoconf will stick with the old result
284 for extras in "" "-ldl"; do
285 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
287 [AC_LANG_PROGRAM([#include <rte_config.h>
288 #include <rte_eal.h>],
289 [int rte_argc; char ** rte_argv;
290 rte_eal_init(rte_argc, rte_argv);])],
291 [DPDKLIB_FOUND=true])
292 if $DPDKLIB_FOUND; then
297 # If linking unsuccessful
298 if test "$DPDKLIB_FOUND" = "false" ; then
299 if $DPDK_AUTO_DISCOVER; then
300 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])
302 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
305 CFLAGS="$ovs_save_CFLAGS"
306 LDFLAGS="$ovs_save_LDFLAGS"
307 if test "$DPDK_AUTO_DISCOVER" = "false"; then
308 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
310 OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
311 OVS_ENABLE_OPTION([-mssse3])
313 # DPDK pmd drivers are not linked unless --whole-archive is used.
315 # This happens because the rest of the DPDK code doesn't use any symbol in
316 # the pmd driver objects, and the drivers register themselves using an
317 # __attribute__((constructor)) function.
319 # These options are specified inside a single -Wl directive to prevent
320 # autotools from reordering them.
321 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
322 AC_SUBST([DPDK_vswitchd_LDFLAGS])
323 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
326 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
329 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
331 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
332 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
333 dnl <REGEX> translated to uppercase.
334 AC_DEFUN([OVS_GREP_IFELSE], [
335 AC_MSG_CHECKING([whether $2 matches in $1])
337 grep '$2' $1 >/dev/null 2>&1
342 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
349 AC_MSG_ERROR([grep exited with status $status])
353 AC_MSG_RESULT([file not found])
358 dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
360 dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
361 dnl structure definition. If this is successful, runs IF-MATCH, otherwise
362 dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
363 dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
364 dnl translated to uppercase.
365 AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
366 AC_MSG_CHECKING([whether $2 has member $3 in $1])
368 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
373 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
380 AC_MSG_ERROR([grep exited with status $status])
384 AC_MSG_RESULT([file not found])
389 dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
391 dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
392 dnl the function signature starting from the line matching FUNCTION
393 dnl and ending with the line containing the closing parenthesis. If
394 dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
395 dnl IF-MATCH is empty then it defines to
396 dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
397 dnl <REGEX> translated to uppercase.
398 AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
399 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
401 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
406 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
413 AC_MSG_ERROR([grep exited with status $status])
417 AC_MSG_RESULT([file not found])
424 dnl Defines NAME to 1 in kcompat.h.
425 AC_DEFUN([OVS_DEFINE], [
426 echo '#define $1 1' >> datapath/linux/kcompat.h.new
429 dnl OVS_CHECK_LINUX_COMPAT
431 dnl Runs various Autoconf checks on the Linux kernel source in
432 dnl the directory in $KBUILD.
433 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
434 rm -f datapath/linux/kcompat.h.new
435 mkdir -p datapath/linux
436 : > datapath/linux/kcompat.h.new
438 echo '#include <linux/version.h>
439 #ifndef RHEL_RELEASE_CODE
440 #define RHEL_RELEASE_CODE 0
441 #define RHEL_RELEASE_VERSION(a, b) 0
442 #endif' >> datapath/linux/kcompat.h.new
444 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
445 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
447 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
448 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
449 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
451 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
452 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
453 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
455 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
456 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
458 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
459 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
460 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
461 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
462 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
464 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
465 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
466 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
467 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
468 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
469 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
471 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
472 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
473 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
474 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
475 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
476 [ip_do_fragment], [net],
477 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
478 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
479 [ip_local_out], [net],
480 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
482 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
484 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
485 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
486 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
487 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
488 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
489 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
490 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
491 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
492 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
493 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
495 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
497 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
499 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
500 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
501 [sub_frag_mem_limit], [struct.netns_frags],
502 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
503 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
504 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
505 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
506 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
508 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
509 dnl OVS does not really need ipv6 label field, but its presence signifies that
510 dnl the stack has all required ipv6 support.
511 dnl OVS also does not need dst_cache But this dependency allows us to write
512 dnl much cleaner code.
514 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
516 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
517 [iptunnel_pull_offloads],
518 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
519 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])
521 OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
522 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
523 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
524 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
525 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
526 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
527 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
528 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
529 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
530 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
531 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
532 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
533 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
534 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
535 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
536 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
537 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
538 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
539 dnl So check type of tstats.
540 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
541 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
542 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
543 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
544 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
545 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
546 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
547 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
548 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
549 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
550 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
552 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
553 [netdev_master_upper_dev_link], [upper_priv],
554 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
555 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
556 [netdev_master_upper_dev_link_rh],
557 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
559 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
562 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
563 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
564 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
565 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
566 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
567 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
568 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
569 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
571 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
572 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
574 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
575 [nf_conn], [struct timer_list[[ \t]]*timeout],
576 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
577 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
578 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
580 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
581 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
582 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
583 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
584 [nf_ct_get_tuplepr], [struct.net],
585 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
586 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
588 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
589 [nf_ct_is_untracked])
590 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
592 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
594 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
595 [nf_connlabels_get], [int bit],
596 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
597 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
598 [nf_conn_labels], [words])
599 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
600 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
601 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
603 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
604 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
606 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
607 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
608 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
609 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
610 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
612 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
613 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
614 [rcu_read_lock_held])])
615 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
617 # Check for the proto_data_valid member in struct sk_buff. The [^@]
618 # is necessary because some versions of this header remove the
619 # member but retain the kerneldoc comment that describes it (which
620 # starts with @). The brackets must be doubled because of m4
622 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
623 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
624 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
625 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
626 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
627 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
628 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
629 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
630 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
631 [OVS_DEFINE([HAVE_U16_RXHASH])])
632 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
633 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
634 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
635 [skb_copy_from_linear_data_offset])
636 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
637 [skb_reset_tail_pointer])
638 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
639 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
640 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
641 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
642 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
643 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
644 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
645 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
646 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
647 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
648 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
649 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
650 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
651 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
652 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
653 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
654 [OVS_DEFINE([HAVE_L4_RXHASH])])
655 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
656 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
657 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
658 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
659 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
660 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
661 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
662 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
663 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
665 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
666 [OVS_DEFINE([HAVE_BOOL_TYPE])])
667 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
668 [OVS_DEFINE([HAVE_CSUM_TYPES])])
669 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
670 [OVS_DEFINE([HAVE_CSUM_TYPES])])
672 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
673 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
675 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
676 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
678 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
679 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
680 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
681 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
682 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
683 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
684 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
685 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
686 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
687 [genl_notify], [net],
688 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
691 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
692 [genl_multicast_group], [id])
693 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
695 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
696 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
697 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
698 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
699 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
700 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
701 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
702 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
703 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
705 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
706 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
707 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
708 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
709 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
710 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
711 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
712 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
713 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
714 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
715 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
716 [nla_parse], [netlink_ext_ack],
717 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
719 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
721 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
722 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
723 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
724 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
725 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
726 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
727 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
729 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
730 [metadata_dst_alloc], [metadata_type])
732 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
734 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
735 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
736 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
737 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
738 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
739 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
740 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
741 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
742 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
743 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
746 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
747 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
748 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
749 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
751 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
752 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
753 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
754 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
755 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
756 [udp_add_offload], [net],
757 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
758 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
759 [nf_defrag_ipv6_enable], [net],
760 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
761 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
762 [OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
763 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
765 [OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
766 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
767 [OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
768 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
769 [nf_conntrack_helper_put])
771 if cmp -s datapath/linux/kcompat.h.new \
772 datapath/linux/kcompat.h >/dev/null 2>&1; then
773 rm datapath/linux/kcompat.h.new
775 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
779 dnl Checks for net/if_packet.h.
780 AC_DEFUN([OVS_CHECK_IF_PACKET],
781 [AC_CHECK_HEADER([net/if_packet.h],
782 [HAVE_IF_PACKET=yes],
784 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
785 if test "$HAVE_IF_PACKET" = yes; then
786 AC_DEFINE([HAVE_IF_PACKET], [1],
787 [Define to 1 if net/if_packet.h is available.])
790 dnl Checks for net/if_dl.h.
792 dnl (We use this as a proxy for checking whether we're building on FreeBSD
794 AC_DEFUN([OVS_CHECK_IF_DL],
795 [AC_CHECK_HEADER([net/if_dl.h],
798 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
799 if test "$HAVE_IF_DL" = yes; then
800 AC_DEFINE([HAVE_IF_DL], [1],
801 [Define to 1 if net/if_dl.h is available.])
803 # On these platforms we use libpcap to access network devices.
804 AC_SEARCH_LIBS([pcap_open_live], [pcap])
807 dnl Checks for buggy strtok_r.
809 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
810 dnl with optimization that can cause segfaults:
812 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
813 AC_DEFUN([OVS_CHECK_STRTOK_R],
815 [whether strtok_r macro segfaults on some inputs],
816 [ovs_cv_strtok_r_bug],
818 [AC_LANG_PROGRAM([#include <stdio.h>
821 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
822 /* Assume bug is present, because relatively minor
823 changes in compiler settings (e.g. optimization
824 level) can make it crop up. */
827 char string[] = ":::";
828 char *save_ptr = (char *) 0xc0ffee;
829 char *token1, *token2;
830 token1 = strtok_r(string, ":", &save_ptr);
831 token2 = strtok_r(NULL, ":", &save_ptr);
832 freopen ("/dev/null", "w", stdout);
833 printf ("%s %s\n", token1, token2);
837 [ovs_cv_strtok_r_bug=no],
838 [ovs_cv_strtok_r_bug=yes],
839 [ovs_cv_strtok_r_bug=yes])])
840 if test $ovs_cv_strtok_r_bug = yes; then
841 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
842 [Define if strtok_r macro segfaults on some inputs])
846 dnl ----------------------------------------------------------------------
847 dnl These macros are from GNU PSPP, with the following original license:
848 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
849 dnl This file is free software; the Free Software Foundation
850 dnl gives unlimited permission to copy and/or distribute it,
851 dnl with or without modifications, as long as this notice is preserved.
853 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
854 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
855 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
856 [ovs_save_CFLAGS="$CFLAGS"
857 dnl Include -Werror in the compiler options, because without -Werror
858 dnl clang's GCC-compatible compiler driver does not return a failure
859 dnl exit status even though it complains about options it does not
862 dnl Also, check stderr as gcc exits with status 0 for options
863 dnl rejected at getopt level.
865 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
866 dnl gcc: unrecognized option '-Qunused-arguments'
869 CFLAGS="$CFLAGS $WERROR $1"
871 [AC_LANG_SOURCE([int x;])],
872 [if test -s conftest.err && grep "unrecognized option" conftest.err
879 CFLAGS="$ovs_save_CFLAGS"])
880 if test $ovs_cv_name = yes; then
881 m4_if([$2], [], [:], [$2])
883 m4_if([$3], [], [:], [$3])
889 dnl Check whether the C compiler accepts -Werror.
890 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
891 AC_DEFUN([OVS_CHECK_WERROR],
893 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
895 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
896 dnl Check whether the given C compiler OPTION is accepted.
897 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
898 AC_DEFUN([OVS_CHECK_CC_OPTION],
899 [AC_REQUIRE([OVS_CHECK_WERROR])
900 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
902 dnl OVS_ENABLE_OPTION([OPTION])
903 dnl Check whether the given C compiler OPTION is accepted.
904 dnl If so, add it to WARNING_FLAGS.
905 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
906 AC_DEFUN([OVS_ENABLE_OPTION],
907 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
908 AC_SUBST([WARNING_FLAGS])])
910 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
911 dnl Check whether the given C compiler OPTION is accepted.
912 dnl If so, enable the given Automake CONDITIONAL.
914 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
915 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
916 [OVS_CHECK_CC_OPTION(
917 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
918 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
919 dnl ----------------------------------------------------------------------
921 dnl Check for too-old XenServer.
922 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
923 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
924 [if test -e /etc/redhat-release; then
925 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
927 if test -z "$ovs_cv_xsversion"; then
928 ovs_cv_xsversion=none
930 case $ovs_cv_xsversion in
934 [[1-9]][[0-9]]* | dnl XenServer 10 or later
935 [[6-9]]* | dnl XenServer 6 or later
936 5.[[7-9]]* | dnl XenServer 5.7 or later
937 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
938 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
939 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
943 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
947 dnl OVS_CHECK_SPARSE_TARGET
949 dnl The "cgcc" script from "sparse" isn't very good at detecting the
950 dnl target for which the code is being built. This helps it out.
951 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
953 [target hint for cgcc],
954 [ac_cv_sparse_target],
955 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
956 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
957 [x86_64-*], [ac_cv_sparse_target=x86_64],
958 [ac_cv_sparse_target=other])])
959 AS_CASE([$ac_cv_sparse_target],
960 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
961 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
962 [SPARSEFLAGS= CGCCFLAGS=])
963 AC_SUBST([SPARSEFLAGS])
964 AC_SUBST([CGCCFLAGS])])
966 dnl OVS_SPARSE_EXTRA_INCLUDES
968 dnl The cgcc script from "sparse" does not search gcc's default
969 dnl search path. Get the default search path from GCC and pass
971 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
972 AC_SUBST([SPARSE_EXTRA_INCLUDES],
973 [`$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 ' ' `] ))
975 dnl OVS_ENABLE_SPARSE
976 AC_DEFUN([OVS_ENABLE_SPARSE],
977 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
978 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
981 AC_CONFIG_COMMANDS_PRE(
982 [CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])])
984 dnl OVS_CTAGS_IDENTIFIERS
986 dnl ctags ignores symbols with extras identifiers. This builds a list of
987 dnl specially handled identifiers to be ignored.
988 AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
989 AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
990 [`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${srcdir}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
992 dnl OVS_PTHREAD_SET_NAME
994 dnl This checks for three known variants of pthreads functions for setting
995 dnl the name of the current thread:
997 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
998 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
999 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
1001 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
1002 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
1005 dnl This macro defines:
1007 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
1008 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
1009 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
1010 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
1011 [AC_CHECK_FUNCS([pthread_set_name_np])
1012 if test $ac_cv_func_pthread_set_name_np != yes; then
1014 [for pthread_setname_np() variant],
1015 [ovs_cv_pthread_setname_np],
1017 [AC_LANG_PROGRAM([#include <pthread.h>
1018 ], [pthread_setname_np(pthread_self(), "name");])],
1019 [ovs_cv_pthread_setname_np=glibc],
1021 [AC_LANG_PROGRAM([#include <pthread.h>
1022 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
1023 [ovs_cv_pthread_setname_np=netbsd],
1024 [ovs_cv_pthread_setname_np=none])])])
1025 case $ovs_cv_pthread_setname_np in # (
1028 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
1029 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
1033 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
1034 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
1039 dnl OVS_CHECK_LINUX_HOST.
1041 dnl Checks whether we're building for a Linux host, based on the presence of
1042 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
1043 dnl LINUX based on the result.
1044 AC_DEFUN([OVS_CHECK_LINUX_HOST],
1046 [whether __linux__ is defined],
1049 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
1050 [ovs_cv_linux=true],
1051 [ovs_cv_linux=false])])
1052 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])