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list.h: Define OVS_LIST_POISON statically
[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 136 if test "$version" -ge 4; then
e23775f2 137 if test "$version" = 4 && test "$patchlevel" -le 3; then
3afcde43 138 : # Linux 4.x
d76aabea 139 else
e23775f2 140 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.3.x is not supported (please refer to the FAQ for advice)])
d76aabea 141 fi
8063e095 142 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
3afcde43 143 : # Linux 3.x
71fe9970 144 else
8063e095 145 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
064af421 146 fi
2520f452
IY		 147 if (test ! -e "$KBUILD"/include/linux/version.h && \
148 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
e3438006
BP		 149 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
150 test ! -e "$KBUILD"/include/generated/autoconf.h); then
a0903134 151 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
064af421 152 fi
e3438006 153 OVS_CHECK_LINUX_COMPAT
064af421 154 fi
e3438006 155 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
064af421
BP		 156])
157
8a9562d2
PS		 158dnl OVS_CHECK_DPDK
159dnl
160dnl Configure DPDK source tree
161AC_DEFUN([OVS_CHECK_DPDK], [
162 AC_ARG_WITH([dpdk],
163 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
e2e54517 164 [Specify the DPDK build directory])])
8a9562d2
PS		 165
166 if test X"$with_dpdk" != X; then
167 RTE_SDK=$with_dpdk
168
169 DPDK_INCLUDE=$RTE_SDK/include
170 DPDK_LIB_DIR=$RTE_SDK/lib
18f777b2 171 DPDK_LIB="-ldpdk"
10d01ad2 172 DPDK_EXTRA_LIB=""
613750ab 173 RTE_SDK_FULL=`readlink -f $RTE_SDK`
10d01ad2 174
693e1138 175 AC_COMPILE_IFELSE(
613750ab 176 [AC_LANG_PROGRAM([#include <$RTE_SDK_FULL/include/rte_config.h>
693e1138
GM		 177#if !RTE_LIBRTE_VHOST_USER
178#error
179#endif], [])],
10d01ad2
DDP		 180 [], [AC_DEFINE([VHOST_CUSE], [1], [DPDK vhost-cuse support enabled, vhost-user disabled.])
181 DPDK_EXTRA_LIB="-lfuse"])
8a9562d2 182
95626395
TG		 183 ovs_save_CFLAGS="$CFLAGS"
184 ovs_save_LDFLAGS="$LDFLAGS"
c1223b11
DDP		 185 LDFLAGS="$LDFLAGS -L$DPDK_LIB_DIR"
186 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
187
188 # On some systems we have to add -ldl to link with dpdk
189 #
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
194
195 found=false
196 save_LIBS=$LIBS
197 for extras in "" "-ldl"; do
3c94676c 198 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
c1223b11
DDP		 199 AC_LINK_IFELSE(
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);])],
204 [found=true])
205 if $found; then
206 break
207 fi
208 done
209 if $found; then :; else
210 AC_MSG_ERROR([cannot link with dpdk])
211 fi
95626395
TG		 212 CFLAGS="$ovs_save_CFLAGS"
213 LDFLAGS="$ovs_save_LDFLAGS"
214 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
ab2a3154
IM		 215 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE"
216 OVS_ENABLE_OPTION([-mssse3])
8a9562d2 217
3c94676c 218 # DPDK pmd drivers are not linked unless --whole-archive is used.
d7310583
DDP		 219 #
220 # This happens because the rest of the DPDK code doesn't use any symbol in
221 # the pmd driver objects, and the drivers register themselves using an
222 # __attribute__((constructor)) function.
223 #
224 # These options are specified inside a single -Wl directive to prevent
225 # autotools from reordering them.
3c94676c 226 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
9475dfeb 227 AC_SUBST([DPDK_vswitchd_LDFLAGS])
8a9562d2 228 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
7d1ced01 229
8a9562d2
PS		 230 else
231 RTE_SDK=
232 fi
233
234 AM_CONDITIONAL([DPDK_NETDEV], test -n "$RTE_SDK")
235])
236
8828e5c7 237dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 238dnl
239dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 240dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
241dnl <REGEX> translated to uppercase.
064af421
BP		 242AC_DEFUN([OVS_GREP_IFELSE], [
243 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 244 if test -f $1; then
245 grep '$2' $1 >/dev/null 2>&1
246 status=$?
247 case $status in
248 0)
249 AC_MSG_RESULT([yes])
8828e5c7 250 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48
JG		 251 ;;
252 1)
253 AC_MSG_RESULT([no])
254 $4
255 ;;
256 *)
257 AC_MSG_ERROR([grep exited with status $status])
258 ;;
259 esac
260 else
261 AC_MSG_RESULT([file not found])
262 $4
263 fi
064af421
BP		 264])
265
13dd4a97
JS		 266dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
267dnl
268dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
269dnl structure definition. If this is successful, runs IF-MATCH, otherwise
270dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
271dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
272dnl translated to uppercase.
273AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
274 AC_MSG_CHECKING([whether $2 has member $3 in $1])
275 if test -f $1; then
83a27884 276 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
13dd4a97
JS		 277 status=$?
278 case $status in
279 0)
280 AC_MSG_RESULT([yes])
281 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
282 ;;
283 1)
284 AC_MSG_RESULT([no])
285 $5
286 ;;
287 *)
288 AC_MSG_ERROR([grep exited with status $status])
289 ;;
290 esac
291 else
292 AC_MSG_RESULT([file not found])
293 $5
294 fi
295])
296
064af421
BP		 297dnl OVS_DEFINE(NAME)
298dnl
299dnl Defines NAME to 1 in kcompat.h.
300AC_DEFUN([OVS_DEFINE], [
22bcc0e7 301 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 302])
303
e3438006 304dnl OVS_CHECK_LINUX_COMPAT
064af421 305dnl
8063e095 306dnl Runs various Autoconf checks on the Linux kernel source in
e3438006
BP		 307dnl the directory in $KBUILD.
308AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 309 rm -f datapath/linux/kcompat.h.new
310 mkdir -p datapath/linux
311 : > datapath/linux/kcompat.h.new
4aa13c0c 312
e23775f2
PS		 313 echo '#include <linux/version.h>
314#ifndef RHEL_RELEASE_CODE
315#define RHEL_RELEASE_CODE 0
316#define RHEL_RELEASE_VERSION(a, b) 0
317#endif' >> datapath/linux/kcompat.h.new
318
e3438006 319 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 320 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
321
e23775f2
PS		 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])
325
e3438006 326 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4303ec34 327 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
4aa13c0c 328
d923a695 329 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
e2f3178f 330 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
d923a695 331
e23775f2
PS		 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([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
d923a695 335 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
ec96e663 336 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
d923a695 337
e3438006 338 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
46d69d18 339 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
2ea82414
PS		 340 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
341 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
e23775f2
PS		 342 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
343 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
344
13dd4a97
JS		 345 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
346 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
213e1f54 347 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_do_fragment])
920fc091 348 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_is_fragment])
cfda4537 349 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
0f09d6e3
JS		 350
351 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
352 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
06f1a61a 353 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
595e069a
JS		 354 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
355 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
8f00ece9
JS		 356 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
357 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
e0d45da3 358 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
91408ae0
JS		 359 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
360 [frags_work])
d1c390e6
JS		 361 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
362 [rwlock])
e0d45da3
JS		 363 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
364 [list_evictor])
401da7b9
JS		 365 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
366 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
8f00ece9 367
e23775f2 368 OVS_GREP_IFELSE([$KSRC/include/net/dst_metadata.h], [metadata_dst])
4aa13c0c 369
fdce83a3
PS		 370 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
371 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
e3438006
BP		 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([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
3f506f07 375 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
42d5dd95
TG		 376 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
377 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
e23775f2 378 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
d1890de5 379 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
8063e095
PS		 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([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
383 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
e23775f2
PS		 384 OVS_GREP_IFELSE([$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([$KSRC/include/linux/netdevice.h], [gro_remcsum])
390
391 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
392 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
cd7330d0
PS		 393 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
394 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
e4e04c3b
JS		 395 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
396 [fragment], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
e2f3178f 397
057772cf
JS		 398 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
399 [tmpl_alloc.*conntrack_zone],
400 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
ac9cd0d2
JS		 401 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
402 [nf_ct_zone_init])
459064e7
JS		 403 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
404 [nf_connlabels_get])
34c3c2b7
JS		 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])
057772cf 409
e2f3178f 410 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
f000c879 411 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
4aa13c0c 412
e23775f2
PS		 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])
418
e3438006
BP		 419 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
420 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 421 [rcu_read_lock_held])])
8fa52250 422 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
cf6cb3a2 423
6a33828d
BP		 424 # Check for the proto_data_valid member in struct sk_buff. The [^@]
425 # is necessary because some versions of this header remove the
426 # member but retain the kerneldoc comment that describes it (which
427 # starts with @). The brackets must be doubled because of m4
428 # quoting rules.
e3438006 429 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 430 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
ccb75a28 431 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
e23775f2
PS		 432 OVS_GREP_IFELSE([$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])
d23239a2 435 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
e23775f2
PS		 436 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_scrub_packet.*xnet],
437 [OVS_DEFINE([HAVE_SKB_SCRUB_PACKET_XNET])])
60c4904f 438 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 439 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
440 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 441 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 442 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 443 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 444 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 445 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
446 [skb_reset_tail_pointer])
e3438006
BP		 447 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
448 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 449 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 450 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 451 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 452 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 453 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 454 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 455 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 456 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 457 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 458 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 459 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 460 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
e2f3178f
PK		 461 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
462 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 463 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
464 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
75e93287
FL		 465 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
466 [OVS_DEFINE([HAVE_L4_RXHASH])])
5cce04b6 467 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370
TG		 468 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
469 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
4aa13c0c 470
e3438006 471 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 472 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 473 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 474 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 475 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
476 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 477
e3438006
BP		 478 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
479 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 480
0d03e51c 481 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
1dba1690 482 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
0d03e51c 483
114fce23
SG		 484 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
485 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 486 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
705e9260 487 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
6233a1bd
TG		 488 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
489 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 490 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 491 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
492 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
493
494 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
495 [genl_multicast_group], [id])
fdce83a3 496 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
13dd4a97 497
cc1d0dea 498 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
e23775f2 499 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
8abaa53c 500 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e23775f2 501 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
2d3ef70b 502 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
a94ebc39
JS		 503 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
504 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
213e1f54
JS		 505 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
506 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
507
e3438006 508 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 509 OVS_GREP_IFELSE([$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])
dd693f9b 512 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
e3438006 513 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 514 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
6dbd98e6
SH		 515 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
516 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
4aa13c0c 517
c4e976db
JG		 518 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
519
e3438006 520 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 521 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 522 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f 523 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
e23775f2 524 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
431488e6 525
09f27436
JG		 526 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
527
3174a818
TG		 528 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
529 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
e23775f2 530 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [VXLAN_HF_RCO])
f6a0c895 531 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 532 [OVS_GREP_IFELSE([$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])
e23775f2
PS		 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])])
539
540 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
f6a0c895
TG		 541 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
542 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
543 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 544
21a719d6
FL		 545 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
546 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
547
22bcc0e7
JG		 548 if cmp -s datapath/linux/kcompat.h.new \
549 datapath/linux/kcompat.h >/dev/null 2>&1; then
550 rm datapath/linux/kcompat.h.new
064af421 551 else
22bcc0e7 552 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 553 fi
554])
555
556dnl Checks for net/if_packet.h.
557AC_DEFUN([OVS_CHECK_IF_PACKET],
558 [AC_CHECK_HEADER([net/if_packet.h],
559 [HAVE_IF_PACKET=yes],
560 [HAVE_IF_PACKET=no])
561 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
562 if test "$HAVE_IF_PACKET" = yes; then
563 AC_DEFINE([HAVE_IF_PACKET], [1],
564 [Define to 1 if net/if_packet.h is available.])
565 fi])
566
f6eb6b20 567dnl Checks for net/if_dl.h.
d30e714c 568dnl
d23fa2ed
YT		 569dnl (We use this as a proxy for checking whether we're building on FreeBSD
570dnl or NetBSD.)
9360d9b7
EM		 571AC_DEFUN([OVS_CHECK_IF_DL],
572 [AC_CHECK_HEADER([net/if_dl.h],
573 [HAVE_IF_DL=yes],
574 [HAVE_IF_DL=no])
575 AM_CONDITIONAL([HAVE_IF_DL], [test "$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.])
d30e714c 579
d23fa2ed 580 # On these platforms we use libpcap to access network devices.
d30e714c 581 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 582 fi])
583
e50097d2
BP		 584dnl Checks for buggy strtok_r.
585dnl
586dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
587dnl with optimization that can cause segfaults:
588dnl
589dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
590AC_DEFUN([OVS_CHECK_STRTOK_R],
591 [AC_CACHE_CHECK(
592 [whether strtok_r macro segfaults on some inputs],
593 [ovs_cv_strtok_r_bug],
594 [AC_RUN_IFELSE(
595 [AC_LANG_PROGRAM([#include <stdio.h>
596 #include <string.h>
597 ],
416e7132
BP		 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. */
602 return 1;
603 #else
604 char string[] = ":::";
e50097d2
BP		 605 char *save_ptr = (char *) 0xc0ffee;
606 char *token1, *token2;
607 token1 = strtok_r(string, ":", &save_ptr);
608 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 609 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 610 printf ("%s %s\n", token1, token2);
611 return 0;
416e7132 612 #endif
e50097d2
BP		 613 ]])],
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])
620 fi
621])
622
064af421
BP		 623dnl ----------------------------------------------------------------------
624dnl These macros are from GNU PSPP, with the following original license:
625dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
626dnl This file is free software; the Free Software Foundation
627dnl gives unlimited permission to copy and/or distribute it,
628dnl with or without modifications, as long as this notice is preserved.
629
50194820 630AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
7c96151e 631 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
064af421
BP		 632 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
633 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 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
637 dnl understand.
c2deac54
YT		 638 dnl
639 dnl Also, check stderr as gcc exits with status 0 for options
640 dnl rejected at getopt level.
641 dnl % touch /tmp/a.c
642 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
643 dnl gcc: unrecognized option '-Qunused-arguments'
644 dnl 0
645 dnl %
50194820 646 CFLAGS="$CFLAGS $WERROR $1"
c2deac54 647 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
064af421
BP		 648 CFLAGS="$ovs_save_CFLAGS"])
649 if test $ovs_cv_name = yes; then
83f6c050 650 m4_if([$2], [], [:], [$2])
064af421
BP		 651 else
652 m4_if([$3], [], [:], [$3])
653 fi
654])
655
50194820
BP		 656dnl OVS_CHECK_WERROR
657dnl
658dnl Check whether the C compiler accepts -Werror.
659dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
660AC_DEFUN([OVS_CHECK_WERROR],
661 [WERROR=
662 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
663
664dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
665dnl Check whether the given C compiler OPTION is accepted.
666dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
667AC_DEFUN([OVS_CHECK_CC_OPTION],
668 [AC_REQUIRE([OVS_CHECK_WERROR])
669 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
670
064af421
BP		 671dnl OVS_ENABLE_OPTION([OPTION])
672dnl Check whether the given C compiler OPTION is accepted.
d161c099 673dnl If so, add it to WARNING_FLAGS.
064af421
BP		 674dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
675AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 676 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
677 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 678
679dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
680dnl Check whether the given C compiler OPTION is accepted.
681dnl If so, enable the given Automake CONDITIONAL.
682
683dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
684AC_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])])
064af421 688dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 689
690dnl Check for too-old XenServer.
691AC_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`
695 fi
696 if test -z "$ovs_cv_xsversion"; then
697 ovs_cv_xsversion=none
698 fi])
699 case $ovs_cv_xsversion in
700 none)
701 ;;
702
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
709 ;;
710
711 *)
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.)])
713 ;;
714 esac])
29d935d6
BP		 715
716dnl OVS_MAKE_HAS_IF([if-true], [if-false])
717dnl
718dnl Checks whether make has the GNU make $(if condition,then,else) extension.
719dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 720AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 721 [AC_CACHE_CHECK(
722 [whether ${MAKE-make} has GNU make \$(if) extension],
723 [ovs_cv_gnu_make_if],
724 [cat <<'EOF' > conftest.mk
725conftest.out:
380f86e4 726 echo $(if x,y,z) > conftest.out
29d935d6
BP		 727.PHONY: all
728EOF
729 rm -f conftest.out
730 AS_ECHO(["$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
738 else
739 ovs_cv_gnu_make_if=no
372d58a4 740 fi])])
29d935d6 741
b4e1bf8b
BP		 742dnl OVS_CHECK_GNU_MAKE
743dnl
744dnl Checks whether make is GNU make (because Linux kernel Makefiles
745dnl only work with GNU make).
746AC_DEFUN([OVS_CHECK_GNU_MAKE],
747 [AC_CACHE_CHECK(
748 [whether ${MAKE-make} is GNU make],
749 [ovs_cv_gnu_make],
750 [rm -f conftest.out
751 AS_ECHO(["$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
756
757 case $result in # (
758 GNU*) ovs_cv_gnu_make=yes ;; # (
759 *) ovs_cv_gnu_make=no ;;
760 esac])
761 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
762
643c0c34
BP		 763dnl OVS_CHECK_SPARSE_TARGET
764dnl
765dnl The "cgcc" script from "sparse" isn't very good at detecting the
766dnl target for which the code is being built. This helps it out.
767AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
768 [AC_CACHE_CHECK(
769 [target hint for cgcc],
770 [ac_cv_sparse_target],
771 [AS_CASE([`$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([$ac_cv_sparse_target],
776 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
777 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
778 [SPARSEFLAGS= CGCCFLAGS=])
779 AC_SUBST([SPARSEFLAGS])
780 AC_SUBST([CGCCFLAGS])])
781
32e96ab7
AZ		 782dnl OVS_SPARSE_EXTRA_INCLUDES
783dnl
784dnl The cgcc script from "sparse" does not search gcc's default
785dnl search path. Get the default search path from GCC and pass
786dnl them to sparse.
787AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
788 AC_SUBST([SPARSE_EXTRA_INCLUDES],
789 [`$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 ' ' `] ))
790
29d935d6
BP		 791dnl OVS_ENABLE_SPARSE
792AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 793 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 794 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 795 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 796 : ${SPARSE=sparse}
797 AC_SUBST([SPARSE])
798 AC_CONFIG_COMMANDS_PRE(
799 [if test $ovs_cv_gnu_make_if = yes; then
38b7a52b 800 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 801 fi])])
8a8cd0ac
BP		 802
803dnl OVS_PTHREAD_SET_NAME
804dnl
805dnl This checks for three known variants of pthreads functions for setting
806dnl the name of the current thread:
807dnl
808dnl glibc: int pthread_setname_np(pthread_t, const char *name);
809dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
810dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
811dnl
812dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
813dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
814dnl provide to it.
815dnl
816dnl This macro defines:
817dnl
818dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
819dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
820dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
821AC_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
824 AC_CACHE_CHECK(
825 [for pthread_setname_np() variant],
826 [ovs_cv_pthread_setname_np],
827 [AC_LINK_IFELSE(
a0903134 828 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 829 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 830 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 831 [AC_LINK_IFELSE(
a0903134 832 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 833], [pthread_setname_np(pthread_self(), "%s", "name");])],
834 [ovs_cv_pthread_setname_np=netbsd],
a0903134 835 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 836 case $ovs_cv_pthread_setname_np in # (
837 glibc)
a0903134
YT		 838 AC_DEFINE(
839 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
840 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
841 ;; # (
8a8cd0ac 842 netbsd)
a0903134
YT		 843 AC_DEFINE(
844 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
845 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
846 ;;
8a8cd0ac
BP		 847 esac
848 fi])
5020f5f0
BP		 849
850dnl OVS_CHECK_LINUX_HOST.
851dnl
852dnl Checks whether we're building for a Linux host, based on the presence of
853dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
854dnl LINUX based on the result.
855AC_DEFUN([OVS_CHECK_LINUX_HOST],
856 [AC_CACHE_CHECK(
857 [whether __linux__ is defined],
858 [ovs_cv_linux],
859 [AC_COMPILE_IFELSE(
860 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
861 [ovs_cv_linux=true],
862 [ovs_cv_linux=false])])
863 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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