3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at:
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
18 AC_DEFUN([OVS_ENABLE_WERROR],
21 [AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
22 [], [enable_Werror=no])
23 AC_CONFIG_COMMANDS_PRE(
24 [if test "X$enable_Werror" = Xyes; then
25 OVS_CFLAGS="$OVS_CFLAGS -Werror"
30 dnl Configure linux kernel source tree
31 AC_DEFUN([OVS_CHECK_LINUX], [
33 [AC_HELP_STRING([--with-linux=/path/to/linux],
34 [Specify the Linux kernel build directory])])
35 AC_ARG_WITH([linux-source],
36 [AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
37 [Specify the Linux kernel source directory
38 (usually figured out automatically from build
41 # Deprecated equivalents to --with-linux, --with-linux-source.
43 AC_ARG_WITH([l26-source])
45 if test X"$with_linux" != X; then
47 elif test X"$with_l26" != X; then
49 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
54 if test X"$KBUILD" != X; then
55 if test X"$with_linux_source" != X; then
56 KSRC=$with_linux_source
57 elif test X"$with_l26_source" != X; then
59 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
63 elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
64 AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
67 if test -n "$KBUILD"; then
68 KBUILD=`eval echo "$KBUILD"`
71 *) KBUILD=`pwd`/$KBUILD ;;
74 # The build directory is what the user provided.
75 # Make sure that it exists.
76 AC_MSG_CHECKING([for Linux build directory])
77 if test -d "$KBUILD"; then
78 AC_MSG_RESULT([$KBUILD])
82 AC_ERROR([source dir $KBUILD doesn't exist])
85 # Debian breaks kernel headers into "source" header and "build" headers.
86 # We want the source headers, but $KBUILD gives us the "build" headers.
87 # Use heuristics to find the source headers.
88 AC_MSG_CHECKING([for Linux source directory])
89 if test -n "$KSRC"; then
90 KSRC=`eval echo "$KSRC"`
93 *) KSRC=`pwd`/$KSRC ;;
95 if test ! -e $KSRC/include/linux/kernel.h; then
96 AC_MSG_ERROR([$KSRC is not a kernel source directory])
100 if test ! -e $KSRC/include/linux/kernel.h; then
101 # Debian kernel build Makefiles tend to include a line of the form:
102 # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
103 # First try to extract the source directory from this line.
104 KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
105 if test ! -e "$KSRC"/include/linux/kernel.h; then
106 # Didn't work. Fall back to name-based heuristics that used to work.
107 case `echo "$KBUILD" | sed 's,/*$,,'` in # (
109 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
112 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
117 if test ! -e "$KSRC"/include/linux/kernel.h; then
118 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
121 AC_MSG_RESULT([$KSRC])
123 AC_MSG_CHECKING([for kernel version])
124 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
125 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
126 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
127 if test X"$version" = X || test X"$patchlevel" = X; then
128 AC_ERROR([cannot determine kernel version])
129 elif test X"$sublevel" = X; then
130 kversion=$version.$patchlevel
132 kversion=$version.$patchlevel.$sublevel
134 AC_MSG_RESULT([$kversion])
136 if test "$version" -ge 4; then
137 if test "$version" = 4 && test "$patchlevel" -le 3; then
140 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.3.x is not supported (please refer to the FAQ for advice)])
142 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
145 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
147 if (test ! -e "$KBUILD"/include/linux/version.h && \
148 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
149 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
150 test ! -e "$KBUILD"/include/generated/autoconf.h); then
151 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
153 OVS_CHECK_LINUX_COMPAT
155 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
160 dnl Configure DPDK source tree
161 AC_DEFUN([OVS_CHECK_DPDK], [
163 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
164 [Specify the DPDK build directory])])
166 if test X"$with_dpdk" != X; then
169 DPDK_INCLUDE=$RTE_SDK/include
170 DPDK_LIB_DIR=$RTE_SDK/lib
173 RTE_SDK_FULL=`readlink -f $RTE_SDK`
176 [AC_LANG_PROGRAM([#include <$RTE_SDK_FULL/include/rte_config.h>
177 #if !RTE_LIBRTE_VHOST_USER
180 [], [AC_DEFINE([VHOST_CUSE], [1], [DPDK vhost-cuse support enabled, vhost-user disabled.])
181 DPDK_EXTRA_LIB="-lfuse"])
183 ovs_save_CFLAGS="$CFLAGS"
184 ovs_save_LDFLAGS="$LDFLAGS"
185 LDFLAGS="$LDFLAGS -L$DPDK_LIB_DIR"
186 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
188 # On some systems we have to add -ldl to link with dpdk
190 # This code, at first, tries to link without -ldl (""),
191 # then adds it and tries again.
192 # Before each attempt the search cache must be unset,
193 # otherwise autoconf will stick with the old result
197 for extras in "" "-ldl"; do
198 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
200 [AC_LANG_PROGRAM([#include <rte_config.h>
201 #include <rte_eal.h>],
202 [int rte_argc; char ** rte_argv;
203 rte_eal_init(rte_argc, rte_argv);])],
209 if $found; then :; else
210 AC_MSG_ERROR([cannot link with dpdk])
212 CFLAGS="$ovs_save_CFLAGS"
213 LDFLAGS="$ovs_save_LDFLAGS"
214 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
215 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE"
216 OVS_ENABLE_OPTION([-mssse3])
218 # DPDK pmd drivers are not linked unless --whole-archive is used.
220 # This happens because the rest of the DPDK code doesn't use any symbol in
221 # the pmd driver objects, and the drivers register themselves using an
222 # __attribute__((constructor)) function.
224 # These options are specified inside a single -Wl directive to prevent
225 # autotools from reordering them.
226 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
227 AC_SUBST([DPDK_vswitchd_LDFLAGS])
228 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
234 AM_CONDITIONAL([DPDK_NETDEV], test -n "$RTE_SDK")
237 dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
239 dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
240 dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
241 dnl <REGEX> translated to uppercase.
242 AC_DEFUN([OVS_GREP_IFELSE], [
243 AC_MSG_CHECKING([whether $2 matches in $1])
245 grep '$2' $1 >/dev/null 2>&1
250 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
257 AC_MSG_ERROR([grep exited with status $status])
261 AC_MSG_RESULT([file not found])
266 dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
268 dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
269 dnl structure definition. If this is successful, runs IF-MATCH, otherwise
270 dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
271 dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
272 dnl translated to uppercase.
273 AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
274 AC_MSG_CHECKING([whether $2 has member $3 in $1])
276 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
281 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
288 AC_MSG_ERROR([grep exited with status $status])
292 AC_MSG_RESULT([file not found])
299 dnl Defines NAME to 1 in kcompat.h.
300 AC_DEFUN([OVS_DEFINE], [
301 echo '#define $1 1' >> datapath/linux/kcompat.h.new
304 dnl OVS_CHECK_LINUX_COMPAT
306 dnl Runs various Autoconf checks on the Linux kernel source in
307 dnl the directory in $KBUILD.
308 AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
309 rm -f datapath/linux/kcompat.h.new
310 mkdir -p datapath/linux
311 : > datapath/linux/kcompat.h.new
313 echo '#include <linux/version.h>
314 #ifndef RHEL_RELEASE_CODE
315 #define RHEL_RELEASE_CODE 0
316 #define RHEL_RELEASE_VERSION(a, b) 0
317 #endif' >> datapath/linux/kcompat.h.new
319 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
320 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
322 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
323 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
324 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
326 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
327 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
329 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
330 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
332 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
333 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
334 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
335 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
336 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
338 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
339 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
340 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
341 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
342 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
343 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
345 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
346 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
347 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_do_fragment])
348 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_is_fragment])
349 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
351 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
352 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
353 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
354 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
355 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
356 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
357 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
358 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
359 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
361 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
363 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
365 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
366 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
368 OVS_GREP_IFELSE([$KSRC/include/net/dst_metadata.h], [metadata_dst])
370 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
371 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
372 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
373 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
374 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
375 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
376 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
377 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
378 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
379 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
380 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
381 dnl So check type of tstats.
382 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
383 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
384 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
385 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
386 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
387 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
388 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
389 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
391 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
392 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
393 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
394 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
395 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
396 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
398 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
399 [tmpl_alloc.*conntrack_zone],
400 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
401 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
403 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
405 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
406 [nf_ct_frag6_consume_orig])
407 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
408 [nf_ct_frag6_output])
410 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
411 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
413 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
414 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
415 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
416 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
417 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
419 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
420 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
421 [rcu_read_lock_held])])
422 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
424 # Check for the proto_data_valid member in struct sk_buff. The [^@]
425 # is necessary because some versions of this header remove the
426 # member but retain the kerneldoc comment that describes it (which
427 # starts with @). The brackets must be doubled because of m4
429 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
430 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
431 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
432 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
433 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_mac_header])
434 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_network_header])
435 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
436 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_scrub_packet.*xnet],
437 [OVS_DEFINE([HAVE_SKB_SCRUB_PACKET_XNET])])
438 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
439 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
440 [OVS_DEFINE([HAVE_U16_RXHASH])])
441 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
442 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
443 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
444 [skb_copy_from_linear_data_offset])
445 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
446 [skb_reset_tail_pointer])
447 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
448 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
449 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
450 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
451 [OVS_DEFINE([HAVE_ICMP6_HDR])])
452 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
453 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
454 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
455 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
456 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
457 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
458 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
459 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
460 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
461 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
462 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
463 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
464 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
465 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
466 [OVS_DEFINE([HAVE_L4_RXHASH])])
467 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
468 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
469 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
471 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
472 [OVS_DEFINE([HAVE_BOOL_TYPE])])
473 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
474 [OVS_DEFINE([HAVE_CSUM_TYPES])])
475 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
476 [OVS_DEFINE([HAVE_CSUM_TYPES])])
478 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
479 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
481 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
482 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
484 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
485 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
486 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
487 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
488 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
489 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
490 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
491 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
492 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
494 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
495 [genl_multicast_group], [id])
496 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
498 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
499 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
500 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
501 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
502 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
503 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
504 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
505 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
506 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
508 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
509 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
510 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
511 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
512 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
513 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
514 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
515 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
516 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
518 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
520 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
521 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
522 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
523 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
524 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
526 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
528 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
529 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
530 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [VXLAN_HF_RCO])
531 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
532 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
533 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
534 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
535 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_set_csum])
536 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
537 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [ipv6_v6only],
538 [OVS_DEFINE([HAVE_UDP_TUNNEL_IPV6])])
540 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
541 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
542 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
543 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
545 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
546 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
548 if cmp -s datapath/linux/kcompat.h.new \
549 datapath/linux/kcompat.h >/dev/null 2>&1; then
550 rm datapath/linux/kcompat.h.new
552 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
556 dnl Checks for net/if_packet.h.
557 AC_DEFUN([OVS_CHECK_IF_PACKET],
558 [AC_CHECK_HEADER([net/if_packet.h],
559 [HAVE_IF_PACKET=yes],
561 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
562 if test "$HAVE_IF_PACKET" = yes; then
563 AC_DEFINE([HAVE_IF_PACKET], [1],
564 [Define to 1 if net/if_packet.h is available.])
567 dnl Checks for net/if_dl.h.
569 dnl (We use this as a proxy for checking whether we're building on FreeBSD
571 AC_DEFUN([OVS_CHECK_IF_DL],
572 [AC_CHECK_HEADER([net/if_dl.h],
575 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
576 if test "$HAVE_IF_DL" = yes; then
577 AC_DEFINE([HAVE_IF_DL], [1],
578 [Define to 1 if net/if_dl.h is available.])
580 # On these platforms we use libpcap to access network devices.
581 AC_SEARCH_LIBS([pcap_open_live], [pcap])
584 dnl Checks for buggy strtok_r.
586 dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
587 dnl with optimization that can cause segfaults:
589 dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
590 AC_DEFUN([OVS_CHECK_STRTOK_R],
592 [whether strtok_r macro segfaults on some inputs],
593 [ovs_cv_strtok_r_bug],
595 [AC_LANG_PROGRAM([#include <stdio.h>
598 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
599 /* Assume bug is present, because relatively minor
600 changes in compiler settings (e.g. optimization
601 level) can make it crop up. */
604 char string[] = ":::";
605 char *save_ptr = (char *) 0xc0ffee;
606 char *token1, *token2;
607 token1 = strtok_r(string, ":", &save_ptr);
608 token2 = strtok_r(NULL, ":", &save_ptr);
609 freopen ("/dev/null", "w", stdout);
610 printf ("%s %s\n", token1, token2);
614 [ovs_cv_strtok_r_bug=no],
615 [ovs_cv_strtok_r_bug=yes],
616 [ovs_cv_strtok_r_bug=yes])])
617 if test $ovs_cv_strtok_r_bug = yes; then
618 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
619 [Define if strtok_r macro segfaults on some inputs])
623 dnl ----------------------------------------------------------------------
624 dnl These macros are from GNU PSPP, with the following original license:
625 dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
626 dnl This file is free software; the Free Software Foundation
627 dnl gives unlimited permission to copy and/or distribute it,
628 dnl with or without modifications, as long as this notice is preserved.
630 AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
631 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
632 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
633 [ovs_save_CFLAGS="$CFLAGS"
634 dnl Include -Werror in the compiler options, because without -Werror
635 dnl clang's GCC-compatible compiler driver does not return a failure
636 dnl exit status even though it complains about options it does not
639 dnl Also, check stderr as gcc exits with status 0 for options
640 dnl rejected at getopt level.
642 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
643 dnl gcc: unrecognized option '-Qunused-arguments'
646 CFLAGS="$CFLAGS $WERROR $1"
647 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
648 CFLAGS="$ovs_save_CFLAGS"])
649 if test $ovs_cv_name = yes; then
650 m4_if([$2], [], [:], [$2])
652 m4_if([$3], [], [:], [$3])
658 dnl Check whether the C compiler accepts -Werror.
659 dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
660 AC_DEFUN([OVS_CHECK_WERROR],
662 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
664 dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
665 dnl Check whether the given C compiler OPTION is accepted.
666 dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
667 AC_DEFUN([OVS_CHECK_CC_OPTION],
668 [AC_REQUIRE([OVS_CHECK_WERROR])
669 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
671 dnl OVS_ENABLE_OPTION([OPTION])
672 dnl Check whether the given C compiler OPTION is accepted.
673 dnl If so, add it to WARNING_FLAGS.
674 dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
675 AC_DEFUN([OVS_ENABLE_OPTION],
676 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
677 AC_SUBST([WARNING_FLAGS])])
679 dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
680 dnl Check whether the given C compiler OPTION is accepted.
681 dnl If so, enable the given Automake CONDITIONAL.
683 dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
684 AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
685 [OVS_CHECK_CC_OPTION(
686 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
687 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
688 dnl ----------------------------------------------------------------------
690 dnl Check for too-old XenServer.
691 AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
692 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
693 [if test -e /etc/redhat-release; then
694 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
696 if test -z "$ovs_cv_xsversion"; then
697 ovs_cv_xsversion=none
699 case $ovs_cv_xsversion in
703 [[1-9]][[0-9]]* | dnl XenServer 10 or later
704 [[6-9]]* | dnl XenServer 6 or later
705 5.[[7-9]]* | dnl XenServer 5.7 or later
706 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
707 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
708 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
712 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.)])
716 dnl OVS_MAKE_HAS_IF([if-true], [if-false])
718 dnl Checks whether make has the GNU make $(if condition,then,else) extension.
719 dnl Runs 'if-true' if so, 'if-false' otherwise.
720 AC_DEFUN([OVS_CHECK_MAKE_IF],
722 [whether ${MAKE-make} has GNU make \$(if) extension],
723 [ovs_cv_gnu_make_if],
724 [cat <<'EOF' > conftest.mk
726 echo $(if x,y,z) > conftest.out
730 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
731 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
732 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
733 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
734 result=`cat conftest.out`
735 rm -f conftest.mk conftest.out
736 if test "X$result" = "Xy"; then
737 ovs_cv_gnu_make_if=yes
739 ovs_cv_gnu_make_if=no
742 dnl OVS_CHECK_GNU_MAKE
744 dnl Checks whether make is GNU make (because Linux kernel Makefiles
745 dnl only work with GNU make).
746 AC_DEFUN([OVS_CHECK_GNU_MAKE],
748 [whether ${MAKE-make} is GNU make],
751 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
752 ${MAKE-make} --version >conftest.out 2>&1
753 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
754 result=`cat conftest.out`
755 rm -f conftest.mk conftest.out
758 GNU*) ovs_cv_gnu_make=yes ;; # (
759 *) ovs_cv_gnu_make=no ;;
761 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
763 dnl OVS_CHECK_SPARSE_TARGET
765 dnl The "cgcc" script from "sparse" isn't very good at detecting the
766 dnl target for which the code is being built. This helps it out.
767 AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
769 [target hint for cgcc],
770 [ac_cv_sparse_target],
771 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
772 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
773 [x86_64-*], [ac_cv_sparse_target=x86_64],
774 [ac_cv_sparse_target=other])])
775 AS_CASE([$ac_cv_sparse_target],
776 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
777 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
778 [SPARSEFLAGS= CGCCFLAGS=])
779 AC_SUBST([SPARSEFLAGS])
780 AC_SUBST([CGCCFLAGS])])
782 dnl OVS_SPARSE_EXTRA_INCLUDES
784 dnl The cgcc script from "sparse" does not search gcc's default
785 dnl search path. Get the default search path from GCC and pass
787 AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
788 AC_SUBST([SPARSE_EXTRA_INCLUDES],
789 [`$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 ' ' `] ))
791 dnl OVS_ENABLE_SPARSE
792 AC_DEFUN([OVS_ENABLE_SPARSE],
793 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
794 AC_REQUIRE([OVS_CHECK_MAKE_IF])
795 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
798 AC_CONFIG_COMMANDS_PRE(
799 [if test $ovs_cv_gnu_make_if = yes; then
800 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
803 dnl OVS_PTHREAD_SET_NAME
805 dnl This checks for three known variants of pthreads functions for setting
806 dnl the name of the current thread:
808 dnl glibc: int pthread_setname_np(pthread_t, const char *name);
809 dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
810 dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
812 dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
813 dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
816 dnl This macro defines:
818 dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
819 dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
820 dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
821 AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
822 [AC_CHECK_FUNCS([pthread_set_name_np])
823 if test $ac_cv_func_pthread_set_name_np != yes; then
825 [for pthread_setname_np() variant],
826 [ovs_cv_pthread_setname_np],
828 [AC_LANG_PROGRAM([#include <pthread.h>
829 ], [pthread_setname_np(pthread_self(), "name");])],
830 [ovs_cv_pthread_setname_np=glibc],
832 [AC_LANG_PROGRAM([#include <pthread.h>
833 ], [pthread_setname_np(pthread_self(), "%s", "name");])],
834 [ovs_cv_pthread_setname_np=netbsd],
835 [ovs_cv_pthread_setname_np=none])])])
836 case $ovs_cv_pthread_setname_np in # (
839 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
840 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
844 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
845 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
850 dnl OVS_CHECK_LINUX_HOST.
852 dnl Checks whether we're building for a Linux host, based on the presence of
853 dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
854 dnl LINUX based on the result.
855 AC_DEFUN([OVS_CHECK_LINUX_HOST],
857 [whether __linux__ is defined],
860 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
862 [ovs_cv_linux=false])])
863 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])