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$enable_Werror" = Xyes; then
35 AC_SUBST([FLAKE8_WERROR])
37 # If --enable-Werror is specified, fail the build on sparse warnings.
38 if test "X$enable_Werror" = Xyes; then
39 SPARSE_WERROR=-Wsparse-error
43 AC_SUBST([SPARSE_WERROR])])
47 dnl Configure linux kernel source tree
48 AC_DEFUN([OVS_CHECK_LINUX], [
50 [AC_HELP_STRING([--with-linux=/path/to/linux],
51 [Specify the Linux kernel build directory])])
52 AC_ARG_WITH([linux-source],
53 [AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
54 [Specify the Linux kernel source directory
55 (usually figured out automatically from build
58 # Deprecated equivalents to --with-linux, --with-linux-source.
60 AC_ARG_WITH([l26-source])
62 if test X"$with_linux" != X; then
64 elif test X"$with_l26" != X; then
66 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
71 if test X"$KBUILD" != X; then
72 if test X"$with_linux_source" != X; then
73 KSRC=$with_linux_source
74 elif test X"$with_l26_source" != X; then
76 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
80 elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
81 AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
84 if test -n "$KBUILD"; then
85 KBUILD=`eval echo "$KBUILD"`
88 *) KBUILD=`pwd`/$KBUILD ;;
91 # The build directory is what the user provided.
92 # Make sure that it exists.
93 AC_MSG_CHECKING([for Linux build directory])
94 if test -d "$KBUILD"; then
95 AC_MSG_RESULT([$KBUILD])
99 AC_ERROR([source dir $KBUILD doesn't exist])
102 # Debian breaks kernel headers into "source" header and "build" headers.
103 # We want the source headers, but $KBUILD gives us the "build" headers.
104 # Use heuristics to find the source headers.
105 AC_MSG_CHECKING([for Linux source directory])
106 if test -n "$KSRC"; then
107 KSRC=`eval echo "$KSRC"`
110 *) KSRC=`pwd`/$KSRC ;;
112 if test ! -e $KSRC/include/linux/kernel.h; then
113 AC_MSG_ERROR([$KSRC is not a kernel source directory])
117 if test ! -e $KSRC/include/linux/kernel.h; then
118 # Debian kernel build Makefiles tend to include a line of the form:
119 # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
120 # First try to extract the source directory from this line.
121 KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
122 if test ! -e "$KSRC"/include/linux/kernel.h; then
123 # Didn't work. Fall back to name-based heuristics that used to work.
124 case `echo "$KBUILD" | sed 's,/*$,,'` in # (
126 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
129 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
134 if test ! -e "$KSRC"/include/linux/kernel.h; then
135 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
138 AC_MSG_RESULT([$KSRC])
140 AC_MSG_CHECKING([for kernel version])
141 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
142 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
143 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
144 if test X"$version" = X || test X"$patchlevel" = X; then
145 AC_ERROR([cannot determine kernel version])
146 elif test X"$sublevel" = X; then
147 kversion=$version.$patchlevel
149 kversion=$version.$patchlevel.$sublevel
151 AC_MSG_RESULT([$kversion])
153 if test "$version" -ge 4; then
154 if test "$version" = 4 && test "$patchlevel" -le 13; then
157 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.13.x is not supported (please refer to the FAQ for advice)])
159 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
162 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
164 if (test ! -e "$KBUILD"/include/linux/version.h && \
165 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
166 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
167 test ! -e "$KBUILD"/include/generated/autoconf.h); then
168 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
170 OVS_CHECK_LINUX_COMPAT
172 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
175 dnl OVS_CHECK_LINUX_TC
177 dnl Configure Linux tc compat.
178 AC_DEFUN([OVS_CHECK_LINUX_TC], [
180 AC_LANG_PROGRAM([#include <linux/pkt_cls.h>], [
181 int x = TCA_FLOWER_KEY_IP_TTL_MASK;
183 [AC_DEFINE([HAVE_TCA_FLOWER_KEY_IP_TTL_MASK], [1],
184 [Define to 1 if TCA_FLOWER_KEY_IP_TTL_MASK is avaiable.])])
187 AC_LANG_PROGRAM([#include <linux/tc_act/tc_vlan.h>], [
188 int x = TCA_VLAN_PUSH_VLAN_PRIORITY;
190 [AC_DEFINE([HAVE_TCA_VLAN_PUSH_VLAN_PRIORITY], [1],
191 [Define to 1 if TCA_VLAN_PUSH_VLAN_PRIORITY is avaiable.])])
194 AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
195 int x = TCA_TUNNEL_KEY_ENC_DST_PORT;
197 [AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_DST_PORT], [1],
198 [Define to 1 if TCA_TUNNEL_KEY_ENC_DST_PORT is avaiable.])])
201 AC_LANG_PROGRAM([#include <linux/tc_act/tc_pedit.h>], [
202 int x = TCA_PEDIT_KEY_EX_HDR_TYPE_UDP;
204 [AC_DEFINE([HAVE_TCA_PEDIT_KEY_EX_HDR_TYPE_UDP], [1],
205 [Define to 1 if TCA_PEDIT_KEY_EX_HDR_TYPE_UDP is avaiable.])])
210 dnl Configure DPDK source tree
211 AC_DEFUN([OVS_CHECK_DPDK], [
213 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
214 [Specify the DPDK build directory])],
217 AC_MSG_CHECKING([whether dpdk datapath is enabled])
218 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
225 DPDK_AUTO_DISCOVER="true"
226 PKG_CHECK_MODULES([DPDK], [libdpdk],
227 [DPDK_INCLUDE="$DPDK_CFLAGS"],
228 [DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"])
231 DPDK_AUTO_DISCOVER="false"
232 DPDK_INCLUDE_PATH="$with_dpdk/include"
233 # If 'with_dpdk' is passed install directory, point to headers
234 # installed in $DESTDIR/$prefix/include/dpdk
235 if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
236 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
237 elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
238 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
240 DPDK_LIB_DIR="$with_dpdk/lib"
247 ovs_save_CFLAGS="$CFLAGS"
248 ovs_save_LDFLAGS="$LDFLAGS"
249 CFLAGS="$CFLAGS $DPDK_INCLUDE"
250 if test "$DPDK_AUTO_DISCOVER" = "false"; then
251 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
257 #include <rte_config.h>
258 #if RTE_LIBRTE_VHOST_NUMA
263 [AC_SEARCH_LIBS([get_mempolicy],[numa],[],[AC_MSG_ERROR([unable to find libnuma, install the dependency package])])
264 DPDK_EXTRA_LIB="-lnuma"
265 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])])
270 #include <rte_config.h>
271 #if RTE_LIBRTE_PMD_PCAP
276 [AC_SEARCH_LIBS([pcap_dump],[pcap],[],[AC_MSG_ERROR([unable to find libpcap, install the dependency package])])
277 DPDK_EXTRA_LIB="-lpcap"
281 #include <rte_config.h>
287 [AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])])
290 # On some systems we have to add -ldl to link with dpdk
292 # This code, at first, tries to link without -ldl (""),
293 # then adds it and tries again.
294 # Before each attempt the search cache must be unset,
295 # otherwise autoconf will stick with the old result
299 for extras in "" "-ldl"; do
300 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
302 [AC_LANG_PROGRAM([#include <rte_config.h>
303 #include <rte_eal.h>],
304 [int rte_argc; char ** rte_argv;
305 rte_eal_init(rte_argc, rte_argv);])],
306 [DPDKLIB_FOUND=true])
307 if $DPDKLIB_FOUND; then
312 # If linking unsuccessful
313 if test "$DPDKLIB_FOUND" = "false" ; then
314 if $DPDK_AUTO_DISCOVER; then
315 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])
317 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
320 CFLAGS="$ovs_save_CFLAGS"
321 LDFLAGS="$ovs_save_LDFLAGS"
322 if test "$DPDK_AUTO_DISCOVER" = "false"; then
323 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
325 OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
326 OVS_ENABLE_OPTION([-mssse3])
328 # DPDK pmd drivers are not linked unless --whole-archive is used.
330 # This happens because the rest of the DPDK code doesn't use any symbol in
331 # the pmd driver objects, and the drivers register themselves using an
332 # __attribute__((constructor)) function.
334 # These options are specified inside a single -Wl directive to prevent
335 # autotools from reordering them.
336 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
337 AC_SUBST([DPDK_vswitchd_LDFLAGS])
338 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
341 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
344 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
346 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
347 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
348 dnl <REGEX> translated to uppercase.
349 AC_DEFUN([OVS_GREP_IFELSE], [
350 AC_MSG_CHECKING([whether $2 matches in $1])
352 grep '$2' $1 >/dev/null 2>&1
357 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
364 AC_MSG_ERROR([grep exited with status $status])
368 AC_MSG_RESULT([file not found])
373 dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
375 dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
376 dnl structure definition. If this is successful, runs IF-MATCH, otherwise
377 dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
378 dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
379 dnl translated to uppercase.
380 AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
381 AC_MSG_CHECKING([whether $2 has member $3 in $1])
383 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
388 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
395 AC_MSG_ERROR([grep exited with status $status])
399 AC_MSG_RESULT([file not found])
404 dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
406 dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
407 dnl the function signature starting from the line matching FUNCTION
408 dnl and ending with the line containing the closing parenthesis. If
409 dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
410 dnl IF-MATCH is empty then it defines to
411 dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
412 dnl <REGEX> translated to uppercase.
413 AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
414 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
416 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
421 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
428 AC_MSG_ERROR([grep exited with status $status])
432 AC_MSG_RESULT([file not found])
439 dnl Defines NAME to 1 in kcompat.h.
440 AC_DEFUN([OVS_DEFINE], [
441 echo '#define $1 1' >> datapath/linux/kcompat.h.new
444 dnl OVS_CHECK_LINUX_COMPAT
446 dnl Runs various Autoconf checks on the Linux kernel source in
447 dnl the directory in $KBUILD.
448 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
449 rm -f datapath/linux/kcompat.h.new
450 mkdir -p datapath/linux
451 : > datapath/linux/kcompat.h.new
453 echo '#include <linux/version.h>
454 #ifndef RHEL_RELEASE_CODE
455 #define RHEL_RELEASE_CODE 0
456 #define RHEL_RELEASE_VERSION(a, b) 0
457 #endif' >> datapath/linux/kcompat.h.new
459 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
460 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
462 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
463 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
464 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
466 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
467 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
468 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
470 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
471 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
473 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
474 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
475 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
476 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
477 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
479 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
480 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
481 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
482 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
483 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
484 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
486 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
487 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
488 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
489 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
490 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
491 [ip_do_fragment], [net],
492 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
493 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
494 [ip_local_out], [net],
495 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
497 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
499 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
500 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
501 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
502 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
503 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
504 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
505 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
506 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
507 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
508 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
510 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
512 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
514 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
515 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
516 [sub_frag_mem_limit], [struct.netns_frags],
517 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
518 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
519 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
520 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
521 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
523 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
524 dnl OVS does not really need ipv6 label field, but its presence signifies that
525 dnl the stack has all required ipv6 support.
526 dnl OVS also does not need dst_cache But this dependency allows us to write
527 dnl much cleaner code.
529 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
531 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
532 [iptunnel_pull_offloads],
533 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
534 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])
536 OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
537 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
538 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
539 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
540 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
541 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
542 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
543 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
544 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
545 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
546 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_gso_error_unwind])
547 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
548 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
549 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
550 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
551 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
552 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
553 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
554 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
555 dnl So check type of tstats.
556 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
557 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
558 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
559 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
560 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
561 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
562 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
563 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
564 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
565 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
566 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
568 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
569 [netdev_master_upper_dev_link], [upper_priv],
570 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
571 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
572 [netdev_master_upper_dev_link_rh],
573 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
575 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
578 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
579 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
580 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
581 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
582 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
583 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
584 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
585 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
587 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
588 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
590 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
591 [nf_conn], [struct timer_list[[ \t]]*timeout],
592 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
593 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
594 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
596 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
597 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
598 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
599 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
600 [nf_ct_get_tuplepr], [struct.net],
601 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
602 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
604 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
605 [nf_ct_is_untracked])
606 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
608 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
610 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
611 [nf_connlabels_get], [int bit],
612 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
613 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
614 [nf_conn_labels], [words])
615 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
616 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
617 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
619 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
620 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
622 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
623 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
624 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
625 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
626 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
628 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
629 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
630 [rcu_read_lock_held])])
631 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
633 # Check for the proto_data_valid member in struct sk_buff. The [^@]
634 # is necessary because some versions of this header remove the
635 # member but retain the kerneldoc comment that describes it (which
636 # starts with @). The brackets must be doubled because of m4
638 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
639 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
640 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
641 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
642 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
643 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
644 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
645 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
646 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
647 [OVS_DEFINE([HAVE_U16_RXHASH])])
648 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
649 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
650 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
651 [skb_copy_from_linear_data_offset])
652 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
653 [skb_reset_tail_pointer])
654 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
655 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
656 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
657 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
658 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
659 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
660 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
661 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
662 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
663 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
664 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
665 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
666 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
667 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
668 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
669 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
670 [OVS_DEFINE([HAVE_L4_RXHASH])])
671 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
672 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
673 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
674 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
675 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
676 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
677 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
678 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
679 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
681 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
682 [OVS_DEFINE([HAVE_BOOL_TYPE])])
683 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
684 [OVS_DEFINE([HAVE_CSUM_TYPES])])
685 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
686 [OVS_DEFINE([HAVE_CSUM_TYPES])])
688 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
689 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
691 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
692 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
694 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
695 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
696 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
697 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
698 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
699 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
700 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
701 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
702 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
703 [genl_notify], [net],
704 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
707 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
708 [genl_multicast_group], [id])
709 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
711 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
712 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
713 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
714 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
715 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
716 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
717 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
718 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
719 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
721 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
722 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
723 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
724 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
725 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
726 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
727 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
728 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
729 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
730 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
731 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
732 [nla_parse], [netlink_ext_ack],
733 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
735 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
737 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
738 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
739 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
740 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
741 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
742 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
743 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
745 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
746 [metadata_dst_alloc], [metadata_type])
748 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
750 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
751 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
752 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
753 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
754 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
755 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
756 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
757 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
758 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
759 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
762 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
763 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
764 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
765 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
767 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
768 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
769 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
770 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
771 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
772 [udp_add_offload], [net],
773 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
774 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
775 [nf_defrag_ipv6_enable], [net],
776 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
777 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
778 [OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
779 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
781 [OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
782 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
783 [OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
784 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
785 [nf_conntrack_helper_put],
786 [OVS_DEFINE(HAVE_NF_CONNTRACK_HELPER_PUT)])
787 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],[[[[:space:]]]SKB_GSO_UDP[[[:space:]]]],
788 [OVS_DEFINE([HAVE_SKB_GSO_UDP])])
789 OVS_GREP_IFELSE([$KSRC/include/net/dst.h],[DST_NOCACHE],
790 [OVS_DEFINE([HAVE_DST_NOCACHE])])
791 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_link_ops],
793 [OVS_DEFINE([HAVE_EXT_ACK_IN_RTNL_LINKOPS])])
794 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
796 [OVS_DEFINE([HAVE_LIST_IN_NF_HOOK_OPS])])
797 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netfilter/nf_conntrack_common.h],
799 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
800 [netdev_master_upper_dev_link], [extack],
801 [OVS_DEFINE([HAVE_UPPER_DEV_LINK_EXTACK])])
802 OVS_GREP_IFELSE([$KSRC/include/linux/compiler_types.h],
803 [__LINUX_COMPILER_TYPES_H],
804 [OVS_DEFINE([HAVE_LINUX_COMPILER_TYPES_H])])
805 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
807 [OVS_DEFINE([HAVE_KTIME_GET_TS64])])
809 if cmp -s datapath/linux/kcompat.h.new \
810 datapath/linux/kcompat.h >/dev/null 2>&1; then
811 rm datapath/linux/kcompat.h.new
813 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
817 dnl Checks for net/if_packet.h.
818 AC_DEFUN([OVS_CHECK_IF_PACKET],
819 [AC_CHECK_HEADER([net/if_packet.h],
820 [HAVE_IF_PACKET=yes],
822 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
823 if test "$HAVE_IF_PACKET" = yes; then
824 AC_DEFINE([HAVE_IF_PACKET], [1],
825 [Define to 1 if net/if_packet.h is available.])
828 dnl Checks for net/if_dl.h.
830 dnl (We use this as a proxy for checking whether we're building on FreeBSD
832 AC_DEFUN([OVS_CHECK_IF_DL],
833 [AC_CHECK_HEADER([net/if_dl.h],
836 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
837 if test "$HAVE_IF_DL" = yes; then
838 AC_DEFINE([HAVE_IF_DL], [1],
839 [Define to 1 if net/if_dl.h is available.])
841 # On these platforms we use libpcap to access network devices.
842 AC_SEARCH_LIBS([pcap_open_live], [pcap])
845 dnl Checks for buggy strtok_r.
847 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
848 dnl with optimization that can cause segfaults:
850 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
851 AC_DEFUN([OVS_CHECK_STRTOK_R],
853 [whether strtok_r macro segfaults on some inputs],
854 [ovs_cv_strtok_r_bug],
856 [AC_LANG_PROGRAM([#include <stdio.h>
859 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
860 /* Assume bug is present, because relatively minor
861 changes in compiler settings (e.g. optimization
862 level) can make it crop up. */
865 char string[] = ":::";
866 char *save_ptr = (char *) 0xc0ffee;
867 char *token1, *token2;
868 token1 = strtok_r(string, ":", &save_ptr);
869 token2 = strtok_r(NULL, ":", &save_ptr);
870 freopen ("/dev/null", "w", stdout);
871 printf ("%s %s\n", token1, token2);
875 [ovs_cv_strtok_r_bug=no],
876 [ovs_cv_strtok_r_bug=yes],
877 [ovs_cv_strtok_r_bug=yes])])
878 if test $ovs_cv_strtok_r_bug = yes; then
879 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
880 [Define if strtok_r macro segfaults on some inputs])
884 dnl ----------------------------------------------------------------------
885 dnl These macros are from GNU PSPP, with the following original license:
886 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
887 dnl This file is free software; the Free Software Foundation
888 dnl gives unlimited permission to copy and/or distribute it,
889 dnl with or without modifications, as long as this notice is preserved.
891 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
892 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
893 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
894 [ovs_save_CFLAGS="$CFLAGS"
895 dnl Include -Werror in the compiler options, because without -Werror
896 dnl clang's GCC-compatible compiler driver does not return a failure
897 dnl exit status even though it complains about options it does not
900 dnl Also, check stderr as gcc exits with status 0 for options
901 dnl rejected at getopt level.
903 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
904 dnl gcc: unrecognized option '-Qunused-arguments'
907 CFLAGS="$CFLAGS $WERROR $1"
909 [AC_LANG_SOURCE([int x;])],
910 [if test -s conftest.err && grep "unrecognized option" conftest.err
917 CFLAGS="$ovs_save_CFLAGS"])
918 if test $ovs_cv_name = yes; then
919 m4_if([$2], [], [:], [$2])
921 m4_if([$3], [], [:], [$3])
927 dnl Check whether the C compiler accepts -Werror.
928 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
929 AC_DEFUN([OVS_CHECK_WERROR],
931 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
933 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
934 dnl Check whether the given C compiler OPTION is accepted.
935 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
936 AC_DEFUN([OVS_CHECK_CC_OPTION],
937 [AC_REQUIRE([OVS_CHECK_WERROR])
938 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
940 dnl OVS_ENABLE_OPTION([OPTION])
941 dnl Check whether the given C compiler OPTION is accepted.
942 dnl If so, add it to WARNING_FLAGS.
943 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
944 AC_DEFUN([OVS_ENABLE_OPTION],
945 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
946 AC_SUBST([WARNING_FLAGS])])
948 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
949 dnl Check whether the given C compiler OPTION is accepted.
950 dnl If so, enable the given Automake CONDITIONAL.
952 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
953 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
954 [OVS_CHECK_CC_OPTION(
955 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
956 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
957 dnl ----------------------------------------------------------------------
959 dnl Check for too-old XenServer.
960 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
961 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
962 [if test -e /etc/redhat-release; then
963 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
965 if test -z "$ovs_cv_xsversion"; then
966 ovs_cv_xsversion=none
968 case $ovs_cv_xsversion in
972 [[1-9]][[0-9]]* | dnl XenServer 10 or later
973 [[6-9]]* | dnl XenServer 6 or later
974 5.[[7-9]]* | dnl XenServer 5.7 or later
975 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
976 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
977 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
981 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
985 dnl OVS_CHECK_SPARSE_TARGET
987 dnl The "cgcc" script from "sparse" isn't very good at detecting the
988 dnl target for which the code is being built. This helps it out.
989 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
991 [target hint for cgcc],
992 [ac_cv_sparse_target],
993 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
994 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
995 [x86_64-*], [ac_cv_sparse_target=x86_64],
996 [ac_cv_sparse_target=other])])
997 AS_CASE([$ac_cv_sparse_target],
998 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
999 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
1000 [SPARSEFLAGS= CGCCFLAGS=])
1001 AC_SUBST([SPARSEFLAGS])
1002 AC_SUBST([CGCCFLAGS])])
1004 dnl OVS_SPARSE_EXTRA_INCLUDES
1006 dnl The cgcc script from "sparse" does not search gcc's default
1007 dnl search path. Get the default search path from GCC and pass
1009 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
1010 AC_SUBST([SPARSE_EXTRA_INCLUDES],
1011 [`$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 ' ' `] ))
1013 dnl OVS_ENABLE_SPARSE
1014 AC_DEFUN([OVS_ENABLE_SPARSE],
1015 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
1016 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
1019 AC_CONFIG_COMMANDS_PRE(
1020 [CC='$(if $(C:0=),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) $(SPARSE_WERROR) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])
1024 [AC_HELP_STRING([--enable-sparse], [Run "sparse" by default])],
1025 [], [enable_sparse=no])
1026 AM_CONDITIONAL([ENABLE_SPARSE_BY_DEFAULT], [test $enable_sparse = yes])])
1028 dnl OVS_CTAGS_IDENTIFIERS
1030 dnl ctags ignores symbols with extras identifiers. This builds a list of
1031 dnl specially handled identifiers to be ignored.
1032 AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
1033 AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
1034 [`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${srcdir}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
1036 dnl OVS_PTHREAD_SET_NAME
1038 dnl This checks for three known variants of pthreads functions for setting
1039 dnl the name of the current thread:
1041 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
1042 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
1043 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
1045 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
1046 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
1049 dnl This macro defines:
1051 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
1052 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
1053 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
1054 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
1055 [AC_CHECK_FUNCS([pthread_set_name_np])
1056 if test $ac_cv_func_pthread_set_name_np != yes; then
1058 [for pthread_setname_np() variant],
1059 [ovs_cv_pthread_setname_np],
1061 [AC_LANG_PROGRAM([#include <pthread.h>
1062 ], [pthread_setname_np(pthread_self(), "name");])],
1063 [ovs_cv_pthread_setname_np=glibc],
1065 [AC_LANG_PROGRAM([#include <pthread.h>
1066 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
1067 [ovs_cv_pthread_setname_np=netbsd],
1068 [ovs_cv_pthread_setname_np=none])])])
1069 case $ovs_cv_pthread_setname_np in # (
1072 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
1073 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
1077 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
1078 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
1083 dnl OVS_CHECK_LINUX_HOST.
1085 dnl Checks whether we're building for a Linux host, based on the presence of
1086 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
1087 dnl LINUX based on the result.
1088 AC_DEFUN([OVS_CHECK_LINUX_HOST],
1090 [whether __linux__ is defined],
1093 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
1094 [ovs_cv_linux=true],
1095 [ovs_cv_linux=false])])
1096 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])