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datapath: check for backported proto_ports_offset
[mirror_ovs.git] / acinclude.m4
CommitLineData
064af421
BP		 1# -*- autoconf -*-
2
416e7132 3# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
064af421 4#
a14bc59f
BP		 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:
064af421 8#
a14bc59f
BP		 9# http://www.apache.org/licenses/LICENSE-2.0
10#
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.
064af421 16
a64e37a1
BP		 17dnl OVS_ENABLE_WERROR
18AC_DEFUN([OVS_ENABLE_WERROR],
19 [AC_ARG_ENABLE(
20 [Werror],
21 [AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
22 [], [enable_Werror=no])
23 AC_CONFIG_COMMANDS_PRE(
24 [if test "X$enable_Werror" = Xyes; then
95626395 25 OVS_CFLAGS="$OVS_CFLAGS -Werror"
a64e37a1
BP		 26 fi])])
27
e3438006 28dnl OVS_CHECK_LINUX
064af421
BP		 29dnl
30dnl Configure linux kernel source tree
e3438006 31AC_DEFUN([OVS_CHECK_LINUX], [
8a2d6596
BP		 32 AC_ARG_WITH([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
a0903134
YT		 38 (usually figured out automatically from build
39 directory)])])
8a2d6596
BP		 40
41 # Deprecated equivalents to --with-linux, --with-linux-source.
42 AC_ARG_WITH([l26])
43 AC_ARG_WITH([l26-source])
44
45 if test X"$with_linux" != X; then
46 KBUILD=$with_linux
47 elif test X"$with_l26" != X; then
48 KBUILD=$with_l26
49 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
50 else
51 KBUILD=
52 fi
53
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
58 KSRC=$with_l26_source
59 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
0a89c170
BP		 60 else
61 KSRC=
8a2d6596
BP		 62 fi
63 elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
64 AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
65 fi
66
e3438006
BP		 67 if test -n "$KBUILD"; then
68 KBUILD=`eval echo "$KBUILD"`
69 case $KBUILD in
0b6d72fc 70 /*) ;;
e3438006 71 *) KBUILD=`pwd`/$KBUILD ;;
0b6d72fc 72 esac
064af421 73
7c9e113b
BP		 74 # The build directory is what the user provided.
75 # Make sure that it exists.
8a2d6596 76 AC_MSG_CHECKING([for Linux build directory])
e3438006 77 if test -d "$KBUILD"; then
a0903134
YT		 78 AC_MSG_RESULT([$KBUILD])
79 AC_SUBST(KBUILD)
064af421 80 else
a0903134
YT		 81 AC_MSG_RESULT([no])
82 AC_ERROR([source dir $KBUILD doesn't exist])
064af421
BP		 83 fi
84
7c9e113b 85 # Debian breaks kernel headers into "source" header and "build" headers.
e3438006 86 # We want the source headers, but $KBUILD gives us the "build" headers.
7c9e113b 87 # Use heuristics to find the source headers.
8a2d6596 88 AC_MSG_CHECKING([for Linux source directory])
e3438006
BP		 89 if test -n "$KSRC"; then
90 KSRC=`eval echo "$KSRC"`
91 case $KSRC in
f5fb5de6 92 /*) ;;
e3438006 93 *) KSRC=`pwd`/$KSRC ;;
b57f675c 94 esac
e3438006 95 if test ! -e $KSRC/include/linux/kernel.h; then
53319f95 96 AC_MSG_ERROR([$KSRC is not a kernel source directory])
f5fb5de6
BP		 97 fi
98 else
e3438006
BP		 99 KSRC=$KBUILD
100 if test ! -e $KSRC/include/linux/kernel.h; then
fe0731b1
BP		 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 # (
108 */build)
109 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
110 ;; # (
111 *)
112 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
113 ;;
114 esac
115 fi
f5fb5de6 116 fi
fe0731b1 117 if test ! -e "$KSRC"/include/linux/kernel.h; then
8a2d6596 118 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
7c9e113b
BP		 119 fi
120 fi
e3438006 121 AC_MSG_RESULT([$KSRC])
7c9e113b
BP		 122
123 AC_MSG_CHECKING([for kernel version])
71fe9970 124 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
e3438006
BP		 125 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
126 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
71fe9970 127 if test X"$version" = X || test X"$patchlevel" = X; then
7c9e113b 128 AC_ERROR([cannot determine kernel version])
71fe9970
BP		 129 elif test X"$sublevel" = X; then
130 kversion=$version.$patchlevel
131 else
132 kversion=$version.$patchlevel.$sublevel
7c9e113b 133 fi
71fe9970
BP		 134 AC_MSG_RESULT([$kversion])
135
3afcde43
JS		 136 if test "$version" -ge 4; then
137 if test "$version" = 4 && test "$patchlevel" -le 0; then
138 : # Linux 4.x
d76aabea 139 else
3afcde43 140 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.0.x is not supported (please refer to the FAQ for advice)])
d76aabea 141 fi
3afcde43
JS		 142 elif test "$version" = 3; then
143 : # Linux 3.x
71fe9970 144 else
d76aabea
PS		 145 if test "$version" -le 1 || test "$patchlevel" -le 5 || test "$sublevel" -le 31; then
146 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 2.6.32 or later is required])
7c9e113b 147 else
d76aabea 148 : # Linux 2.6.x
7c9e113b 149 fi
064af421 150 fi
2520f452
IY		 151 if (test ! -e "$KBUILD"/include/linux/version.h && \
152 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
e3438006
BP		 153 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
154 test ! -e "$KBUILD"/include/generated/autoconf.h); then
a0903134 155 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
064af421 156 fi
e3438006 157 OVS_CHECK_LINUX_COMPAT
064af421 158 fi
e3438006 159 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
064af421
BP		 160])
161
8a9562d2
PS		 162dnl OVS_CHECK_DPDK
163dnl
164dnl Configure DPDK source tree
165AC_DEFUN([OVS_CHECK_DPDK], [
166 AC_ARG_WITH([dpdk],
167 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
e2e54517 168 [Specify the DPDK build directory])])
8a9562d2
PS		 169
170 if test X"$with_dpdk" != X; then
171 RTE_SDK=$with_dpdk
172
173 DPDK_INCLUDE=$RTE_SDK/include
174 DPDK_LIB_DIR=$RTE_SDK/lib
3c94676c 175 DPDK_LIB="-lintel_dpdk"
10d01ad2
DDP		 176 DPDK_EXTRA_LIB=""
177
693e1138
GM		 178 AC_COMPILE_IFELSE(
179 [AC_LANG_PROGRAM([#include <$RTE_SDK/include/rte_config.h>
180#if !RTE_LIBRTE_VHOST_USER
181#error
182#endif], [])],
10d01ad2
DDP		 183 [], [AC_DEFINE([VHOST_CUSE], [1], [DPDK vhost-cuse support enabled, vhost-user disabled.])
184 DPDK_EXTRA_LIB="-lfuse"])
8a9562d2 185
95626395
TG		 186 ovs_save_CFLAGS="$CFLAGS"
187 ovs_save_LDFLAGS="$LDFLAGS"
c1223b11
DDP		 188 LDFLAGS="$LDFLAGS -L$DPDK_LIB_DIR"
189 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
190
191 # On some systems we have to add -ldl to link with dpdk
192 #
193 # This code, at first, tries to link without -ldl (""),
194 # then adds it and tries again.
195 # Before each attempt the search cache must be unset,
196 # otherwise autoconf will stick with the old result
197
198 found=false
199 save_LIBS=$LIBS
200 for extras in "" "-ldl"; do
3c94676c 201 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
c1223b11
DDP		 202 AC_LINK_IFELSE(
203 [AC_LANG_PROGRAM([#include <rte_config.h>
204 #include <rte_eal.h>],
205 [int rte_argc; char ** rte_argv;
206 rte_eal_init(rte_argc, rte_argv);])],
207 [found=true])
208 if $found; then
209 break
210 fi
211 done
212 if $found; then :; else
213 AC_MSG_ERROR([cannot link with dpdk])
214 fi
95626395
TG		 215 CFLAGS="$ovs_save_CFLAGS"
216 LDFLAGS="$ovs_save_LDFLAGS"
217 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
543342a4 218 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE -mssse3"
8a9562d2 219
3c94676c 220 # DPDK pmd drivers are not linked unless --whole-archive is used.
d7310583
DDP		 221 #
222 # This happens because the rest of the DPDK code doesn't use any symbol in
223 # the pmd driver objects, and the drivers register themselves using an
224 # __attribute__((constructor)) function.
225 #
226 # These options are specified inside a single -Wl directive to prevent
227 # autotools from reordering them.
3c94676c 228 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
9475dfeb 229 AC_SUBST([DPDK_vswitchd_LDFLAGS])
8a9562d2 230 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
7d1ced01 231
8a9562d2
PS		 232 else
233 RTE_SDK=
234 fi
235
236 AM_CONDITIONAL([DPDK_NETDEV], test -n "$RTE_SDK")
237])
238
8828e5c7 239dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 240dnl
241dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 242dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
243dnl <REGEX> translated to uppercase.
064af421
BP		 244AC_DEFUN([OVS_GREP_IFELSE], [
245 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 246 if test -f $1; then
247 grep '$2' $1 >/dev/null 2>&1
248 status=$?
249 case $status in
250 0)
251 AC_MSG_RESULT([yes])
8828e5c7 252 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48
JG		 253 ;;
254 1)
255 AC_MSG_RESULT([no])
256 $4
257 ;;
258 *)
259 AC_MSG_ERROR([grep exited with status $status])
260 ;;
261 esac
262 else
263 AC_MSG_RESULT([file not found])
264 $4
265 fi
064af421
BP		 266])
267
13dd4a97
JS		 268dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
269dnl
270dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
271dnl structure definition. If this is successful, runs IF-MATCH, otherwise
272dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
273dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
274dnl translated to uppercase.
275AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
276 AC_MSG_CHECKING([whether $2 has member $3 in $1])
277 if test -f $1; then
83a27884 278 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
13dd4a97
JS		 279 status=$?
280 case $status in
281 0)
282 AC_MSG_RESULT([yes])
283 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
284 ;;
285 1)
286 AC_MSG_RESULT([no])
287 $5
288 ;;
289 *)
290 AC_MSG_ERROR([grep exited with status $status])
291 ;;
292 esac
293 else
294 AC_MSG_RESULT([file not found])
295 $5
296 fi
297])
298
064af421
BP		 299dnl OVS_DEFINE(NAME)
300dnl
301dnl Defines NAME to 1 in kcompat.h.
302AC_DEFUN([OVS_DEFINE], [
22bcc0e7 303 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 304])
305
e3438006 306dnl OVS_CHECK_LINUX_COMPAT
064af421
BP		 307dnl
308dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
e3438006
BP		 309dnl the directory in $KBUILD.
310AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 311 rm -f datapath/linux/kcompat.h.new
312 mkdir -p datapath/linux
313 : > datapath/linux/kcompat.h.new
4aa13c0c 314
e3438006 315 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 316 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
317
e3438006 318 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4303ec34 319 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
4aa13c0c 320
d923a695 321 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
e2f3178f 322 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
d923a695
JG		 323
324 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
325
e3438006 326 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
46d69d18 327 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
2ea82414
PS		 328 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
329 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
13dd4a97
JS		 330 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
331 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
4aa13c0c 332
e3438006
BP		 333 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
334 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
335 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
42d5dd95
TG		 336 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
337 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
d1890de5 338 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
e2f3178f 339 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats])
cd7330d0
PS		 340 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
341 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
e2f3178f
PK		 342
343 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
4aa13c0c 344
e3438006
BP		 345 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
346 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 347 [rcu_read_lock_held])])
8fa52250 348 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
cf6cb3a2 349
6a33828d
BP		 350 # Check for the proto_data_valid member in struct sk_buff. The [^@]
351 # is necessary because some versions of this header remove the
352 # member but retain the kerneldoc comment that describes it (which
353 # starts with @). The brackets must be doubled because of m4
354 # quoting rules.
e3438006 355 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 356 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
d23239a2 357 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
60c4904f 358 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 359 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
360 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 361 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 362 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 363 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 364 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 365 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
366 [skb_reset_tail_pointer])
e3438006
BP		 367 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
368 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 369 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 370 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 371 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 372 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 373 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 374 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 375 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 376 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 377 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 378 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 379 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 380 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
e2f3178f
PK		 381 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
382 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 383 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
384 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
75e93287
FL		 385 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
386 [OVS_DEFINE([HAVE_L4_RXHASH])])
5cce04b6 387 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370
TG		 388 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
389 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
4aa13c0c 390
e3438006 391 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 392 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 393 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 394 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 395 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
396 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 397
e3438006
BP		 398 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
399 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 400
114fce23
SG		 401 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
402 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 403 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
705e9260 404 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
6233a1bd
TG		 405 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
406 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 407 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 408 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
409 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
410
411 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
412 [genl_multicast_group], [id])
413
cc1d0dea 414 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
8abaa53c 415 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e3438006 416 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 417 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
418 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
419 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
e3438006 420 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 421 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
4aa13c0c 422
c4e976db
JG		 423 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
424
e3438006 425 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 426 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 427 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f
TG		 428 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
429
431488e6 430
09f27436
JG		 431 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
432
f285d3e7
TG		 433 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
434 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
3174a818
TG		 435 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
436 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
f6a0c895 437 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 438 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
439 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
440 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
441 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_set_csum])
f6a0c895
TG		 442 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df:1],
443 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
13dd4a97
JS		 444 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_GRE_CSUM],
445 [OVS_DEFINE([HAVE_SKB_GSO_GRE_CSUM])])
446 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_UDP_TUNNEL_CSUM],
447 [OVS_DEFINE([HAVE_SKB_GSO_UDP_TUNNEL_CSUM])])
f6a0c895
TG		 448 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
449 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 450
22bcc0e7
JG		 451 if cmp -s datapath/linux/kcompat.h.new \
452 datapath/linux/kcompat.h >/dev/null 2>&1; then
453 rm datapath/linux/kcompat.h.new
064af421 454 else
22bcc0e7 455 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 456 fi
457])
458
459dnl Checks for net/if_packet.h.
460AC_DEFUN([OVS_CHECK_IF_PACKET],
461 [AC_CHECK_HEADER([net/if_packet.h],
462 [HAVE_IF_PACKET=yes],
463 [HAVE_IF_PACKET=no])
464 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
465 if test "$HAVE_IF_PACKET" = yes; then
466 AC_DEFINE([HAVE_IF_PACKET], [1],
467 [Define to 1 if net/if_packet.h is available.])
468 fi])
469
f6eb6b20 470dnl Checks for net/if_dl.h.
d30e714c 471dnl
d23fa2ed
YT		 472dnl (We use this as a proxy for checking whether we're building on FreeBSD
473dnl or NetBSD.)
9360d9b7
EM		 474AC_DEFUN([OVS_CHECK_IF_DL],
475 [AC_CHECK_HEADER([net/if_dl.h],
476 [HAVE_IF_DL=yes],
477 [HAVE_IF_DL=no])
478 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
479 if test "$HAVE_IF_DL" = yes; then
480 AC_DEFINE([HAVE_IF_DL], [1],
481 [Define to 1 if net/if_dl.h is available.])
d30e714c 482
d23fa2ed 483 # On these platforms we use libpcap to access network devices.
d30e714c 484 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 485 fi])
486
e50097d2
BP		 487dnl Checks for buggy strtok_r.
488dnl
489dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
490dnl with optimization that can cause segfaults:
491dnl
492dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
493AC_DEFUN([OVS_CHECK_STRTOK_R],
494 [AC_CACHE_CHECK(
495 [whether strtok_r macro segfaults on some inputs],
496 [ovs_cv_strtok_r_bug],
497 [AC_RUN_IFELSE(
498 [AC_LANG_PROGRAM([#include <stdio.h>
499 #include <string.h>
500 ],
416e7132
BP		 501 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
502 /* Assume bug is present, because relatively minor
503 changes in compiler settings (e.g. optimization
504 level) can make it crop up. */
505 return 1;
506 #else
507 char string[] = ":::";
e50097d2
BP		 508 char *save_ptr = (char *) 0xc0ffee;
509 char *token1, *token2;
510 token1 = strtok_r(string, ":", &save_ptr);
511 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 512 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 513 printf ("%s %s\n", token1, token2);
514 return 0;
416e7132 515 #endif
e50097d2
BP		 516 ]])],
517 [ovs_cv_strtok_r_bug=no],
518 [ovs_cv_strtok_r_bug=yes],
519 [ovs_cv_strtok_r_bug=yes])])
520 if test $ovs_cv_strtok_r_bug = yes; then
521 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
522 [Define if strtok_r macro segfaults on some inputs])
523 fi
524])
525
064af421
BP		 526dnl ----------------------------------------------------------------------
527dnl These macros are from GNU PSPP, with the following original license:
528dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
529dnl This file is free software; the Free Software Foundation
530dnl gives unlimited permission to copy and/or distribute it,
531dnl with or without modifications, as long as this notice is preserved.
532
50194820 533AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
7c96151e 534 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
064af421
BP		 535 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
536 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 537 dnl Include -Werror in the compiler options, because without -Werror
538 dnl clang's GCC-compatible compiler driver does not return a failure
539 dnl exit status even though it complains about options it does not
540 dnl understand.
c2deac54
YT		 541 dnl
542 dnl Also, check stderr as gcc exits with status 0 for options
543 dnl rejected at getopt level.
544 dnl % touch /tmp/a.c
545 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
546 dnl gcc: unrecognized option '-Qunused-arguments'
547 dnl 0
548 dnl %
50194820 549 CFLAGS="$CFLAGS $WERROR $1"
c2deac54 550 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
064af421
BP		 551 CFLAGS="$ovs_save_CFLAGS"])
552 if test $ovs_cv_name = yes; then
83f6c050 553 m4_if([$2], [], [:], [$2])
064af421
BP		 554 else
555 m4_if([$3], [], [:], [$3])
556 fi
557])
558
50194820
BP		 559dnl OVS_CHECK_WERROR
560dnl
561dnl Check whether the C compiler accepts -Werror.
562dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
563AC_DEFUN([OVS_CHECK_WERROR],
564 [WERROR=
565 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
566
567dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
568dnl Check whether the given C compiler OPTION is accepted.
569dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
570AC_DEFUN([OVS_CHECK_CC_OPTION],
571 [AC_REQUIRE([OVS_CHECK_WERROR])
572 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
573
064af421
BP		 574dnl OVS_ENABLE_OPTION([OPTION])
575dnl Check whether the given C compiler OPTION is accepted.
d161c099 576dnl If so, add it to WARNING_FLAGS.
064af421
BP		 577dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
578AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 579 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
580 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 581
582dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
583dnl Check whether the given C compiler OPTION is accepted.
584dnl If so, enable the given Automake CONDITIONAL.
585
586dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
587AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
588 [OVS_CHECK_CC_OPTION(
589 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
590 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 591dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 592
593dnl Check for too-old XenServer.
594AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
595 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
596 [if test -e /etc/redhat-release; then
597 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
598 fi
599 if test -z "$ovs_cv_xsversion"; then
600 ovs_cv_xsversion=none
601 fi])
602 case $ovs_cv_xsversion in
603 none)
604 ;;
605
606 [[1-9]][[0-9]]* | dnl XenServer 10 or later
607 [[6-9]]* | dnl XenServer 6 or later
608 5.[[7-9]]* | dnl XenServer 5.7 or later
609 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
610 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
611 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
612 ;;
613
614 *)
615 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.)])
616 ;;
617 esac])
29d935d6
BP		 618
619dnl OVS_MAKE_HAS_IF([if-true], [if-false])
620dnl
621dnl Checks whether make has the GNU make $(if condition,then,else) extension.
622dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 623AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 624 [AC_CACHE_CHECK(
625 [whether ${MAKE-make} has GNU make \$(if) extension],
626 [ovs_cv_gnu_make_if],
627 [cat <<'EOF' > conftest.mk
628conftest.out:
380f86e4 629 echo $(if x,y,z) > conftest.out
29d935d6
BP		 630.PHONY: all
631EOF
632 rm -f conftest.out
633 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
634 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
635 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
636 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
637 result=`cat conftest.out`
638 rm -f conftest.mk conftest.out
639 if test "X$result" = "Xy"; then
640 ovs_cv_gnu_make_if=yes
641 else
642 ovs_cv_gnu_make_if=no
372d58a4 643 fi])])
29d935d6 644
b4e1bf8b
BP		 645dnl OVS_CHECK_GNU_MAKE
646dnl
647dnl Checks whether make is GNU make (because Linux kernel Makefiles
648dnl only work with GNU make).
649AC_DEFUN([OVS_CHECK_GNU_MAKE],
650 [AC_CACHE_CHECK(
651 [whether ${MAKE-make} is GNU make],
652 [ovs_cv_gnu_make],
653 [rm -f conftest.out
654 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
655 ${MAKE-make} --version >conftest.out 2>&1
656 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
657 result=`cat conftest.out`
658 rm -f conftest.mk conftest.out
659
660 case $result in # (
661 GNU*) ovs_cv_gnu_make=yes ;; # (
662 *) ovs_cv_gnu_make=no ;;
663 esac])
664 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
665
643c0c34
BP		 666dnl OVS_CHECK_SPARSE_TARGET
667dnl
668dnl The "cgcc" script from "sparse" isn't very good at detecting the
669dnl target for which the code is being built. This helps it out.
670AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
671 [AC_CACHE_CHECK(
672 [target hint for cgcc],
673 [ac_cv_sparse_target],
674 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
675 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
676 [x86_64-*], [ac_cv_sparse_target=x86_64],
677 [ac_cv_sparse_target=other])])
678 AS_CASE([$ac_cv_sparse_target],
679 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
680 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
681 [SPARSEFLAGS= CGCCFLAGS=])
682 AC_SUBST([SPARSEFLAGS])
683 AC_SUBST([CGCCFLAGS])])
684
32e96ab7
AZ		 685dnl OVS_SPARSE_EXTRA_INCLUDES
686dnl
687dnl The cgcc script from "sparse" does not search gcc's default
688dnl search path. Get the default search path from GCC and pass
689dnl them to sparse.
690AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
691 AC_SUBST([SPARSE_EXTRA_INCLUDES],
692 [`$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 ' ' `] ))
693
29d935d6
BP		 694dnl OVS_ENABLE_SPARSE
695AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 696 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 697 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 698 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 699 : ${SPARSE=sparse}
700 AC_SUBST([SPARSE])
701 AC_CONFIG_COMMANDS_PRE(
702 [if test $ovs_cv_gnu_make_if = yes; then
38b7a52b 703 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 704 fi])])
8a8cd0ac
BP		 705
706dnl OVS_PTHREAD_SET_NAME
707dnl
708dnl This checks for three known variants of pthreads functions for setting
709dnl the name of the current thread:
710dnl
711dnl glibc: int pthread_setname_np(pthread_t, const char *name);
712dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
713dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
714dnl
715dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
716dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
717dnl provide to it.
718dnl
719dnl This macro defines:
720dnl
721dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
722dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
723dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
724AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
725 [AC_CHECK_FUNCS([pthread_set_name_np])
726 if test $ac_cv_func_pthread_set_name_np != yes; then
727 AC_CACHE_CHECK(
728 [for pthread_setname_np() variant],
729 [ovs_cv_pthread_setname_np],
730 [AC_LINK_IFELSE(
a0903134 731 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 732 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 733 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 734 [AC_LINK_IFELSE(
a0903134 735 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 736], [pthread_setname_np(pthread_self(), "%s", "name");])],
737 [ovs_cv_pthread_setname_np=netbsd],
a0903134 738 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 739 case $ovs_cv_pthread_setname_np in # (
740 glibc)
a0903134
YT		 741 AC_DEFINE(
742 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
743 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
744 ;; # (
8a8cd0ac 745 netbsd)
a0903134
YT		 746 AC_DEFINE(
747 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
748 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
749 ;;
8a8cd0ac
BP		 750 esac
751 fi])
5020f5f0
BP		 752
753dnl OVS_CHECK_LINUX_HOST.
754dnl
755dnl Checks whether we're building for a Linux host, based on the presence of
756dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
757dnl LINUX based on the result.
758AC_DEFUN([OVS_CHECK_LINUX_HOST],
759 [AC_CACHE_CHECK(
760 [whether __linux__ is defined],
761 [ovs_cv_linux],
762 [AC_COMPILE_IFELSE(
763 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
764 [ovs_cv_linux=true],
765 [ovs_cv_linux=false])])
766 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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