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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 $kversion, but version newer than 4.3.x is not supported (please refer to the FAQ for advice)])
d76aabea 141 fi
3afcde43
JS		 142 elif test "$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
18f777b2 175 DPDK_LIB="-ldpdk"
10d01ad2 176 DPDK_EXTRA_LIB=""
613750ab 177 RTE_SDK_FULL=`readlink -f $RTE_SDK`
10d01ad2 178
693e1138 179 AC_COMPILE_IFELSE(
613750ab 180 [AC_LANG_PROGRAM([#include <$RTE_SDK_FULL/include/rte_config.h>
693e1138
GM		 181#if !RTE_LIBRTE_VHOST_USER
182#error
183#endif], [])],
10d01ad2
DDP		 184 [], [AC_DEFINE([VHOST_CUSE], [1], [DPDK vhost-cuse support enabled, vhost-user disabled.])
185 DPDK_EXTRA_LIB="-lfuse"])
8a9562d2 186
95626395
TG		 187 ovs_save_CFLAGS="$CFLAGS"
188 ovs_save_LDFLAGS="$LDFLAGS"
c1223b11
DDP		 189 LDFLAGS="$LDFLAGS -L$DPDK_LIB_DIR"
190 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
191
192 # On some systems we have to add -ldl to link with dpdk
193 #
194 # This code, at first, tries to link without -ldl (""),
195 # then adds it and tries again.
196 # Before each attempt the search cache must be unset,
197 # otherwise autoconf will stick with the old result
198
199 found=false
200 save_LIBS=$LIBS
201 for extras in "" "-ldl"; do
3c94676c 202 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
c1223b11
DDP		 203 AC_LINK_IFELSE(
204 [AC_LANG_PROGRAM([#include <rte_config.h>
205 #include <rte_eal.h>],
206 [int rte_argc; char ** rte_argv;
207 rte_eal_init(rte_argc, rte_argv);])],
208 [found=true])
209 if $found; then
210 break
211 fi
212 done
213 if $found; then :; else
214 AC_MSG_ERROR([cannot link with dpdk])
215 fi
95626395
TG		 216 CFLAGS="$ovs_save_CFLAGS"
217 LDFLAGS="$ovs_save_LDFLAGS"
218 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
ab2a3154
IM		 219 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE"
220 OVS_ENABLE_OPTION([-mssse3])
8a9562d2 221
3c94676c 222 # DPDK pmd drivers are not linked unless --whole-archive is used.
d7310583
DDP		 223 #
224 # This happens because the rest of the DPDK code doesn't use any symbol in
225 # the pmd driver objects, and the drivers register themselves using an
226 # __attribute__((constructor)) function.
227 #
228 # These options are specified inside a single -Wl directive to prevent
229 # autotools from reordering them.
3c94676c 230 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
9475dfeb 231 AC_SUBST([DPDK_vswitchd_LDFLAGS])
8a9562d2 232 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
7d1ced01 233
8a9562d2
PS		 234 else
235 RTE_SDK=
236 fi
237
238 AM_CONDITIONAL([DPDK_NETDEV], test -n "$RTE_SDK")
239])
240
8828e5c7 241dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 242dnl
243dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 244dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
245dnl <REGEX> translated to uppercase.
064af421
BP		 246AC_DEFUN([OVS_GREP_IFELSE], [
247 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 248 if test -f $1; then
249 grep '$2' $1 >/dev/null 2>&1
250 status=$?
251 case $status in
252 0)
253 AC_MSG_RESULT([yes])
8828e5c7 254 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48
JG		 255 ;;
256 1)
257 AC_MSG_RESULT([no])
258 $4
259 ;;
260 *)
261 AC_MSG_ERROR([grep exited with status $status])
262 ;;
263 esac
264 else
265 AC_MSG_RESULT([file not found])
266 $4
267 fi
064af421
BP		 268])
269
13dd4a97
JS		 270dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
271dnl
272dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
273dnl structure definition. If this is successful, runs IF-MATCH, otherwise
274dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
275dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
276dnl translated to uppercase.
277AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
278 AC_MSG_CHECKING([whether $2 has member $3 in $1])
279 if test -f $1; then
83a27884 280 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
13dd4a97
JS		 281 status=$?
282 case $status in
283 0)
284 AC_MSG_RESULT([yes])
285 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
286 ;;
287 1)
288 AC_MSG_RESULT([no])
289 $5
290 ;;
291 *)
292 AC_MSG_ERROR([grep exited with status $status])
293 ;;
294 esac
295 else
296 AC_MSG_RESULT([file not found])
297 $5
298 fi
299])
300
064af421
BP		 301dnl OVS_DEFINE(NAME)
302dnl
303dnl Defines NAME to 1 in kcompat.h.
304AC_DEFUN([OVS_DEFINE], [
22bcc0e7 305 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 306])
307
e3438006 308dnl OVS_CHECK_LINUX_COMPAT
064af421
BP		 309dnl
310dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
e3438006
BP		 311dnl the directory in $KBUILD.
312AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 313 rm -f datapath/linux/kcompat.h.new
314 mkdir -p datapath/linux
315 : > datapath/linux/kcompat.h.new
4aa13c0c 316
e23775f2
PS		 317 echo '#include <linux/version.h>
318#ifndef RHEL_RELEASE_CODE
319#define RHEL_RELEASE_CODE 0
320#define RHEL_RELEASE_VERSION(a, b) 0
321#endif' >> datapath/linux/kcompat.h.new
322
e3438006 323 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 324 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
325
e23775f2
PS		 326 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
327 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
328 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
329
e3438006 330 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4303ec34 331 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
4aa13c0c 332
d923a695 333 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
e2f3178f 334 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
d923a695 335
e23775f2
PS		 336 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
337 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
338 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
d923a695 339 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
ec96e663 340 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
d923a695 341
e3438006 342 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
46d69d18 343 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
2ea82414
PS		 344 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
345 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
e23775f2
PS		 346 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
347 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
348
13dd4a97
JS		 349 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
350 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
213e1f54 351 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_do_fragment])
920fc091 352 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_is_fragment])
cfda4537 353 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
595e069a
JS		 354 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
355 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
8f00ece9
JS		 356 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
357 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
91408ae0
JS		 358 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
359 [frags_work])
d1c390e6
JS		 360 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
361 [rwlock])
8f00ece9 362
e23775f2 363 OVS_GREP_IFELSE([$KSRC/include/net/dst_metadata.h], [metadata_dst])
4aa13c0c 364
fdce83a3
PS		 365 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
366 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
e3438006
BP		 367 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
368 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
369 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
3f506f07 370 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
42d5dd95
TG		 371 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
372 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
e23775f2 373 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
d1890de5 374 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
e2f3178f 375 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats])
572e54fa
FL		 376 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_rx_handler_register])
377 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_extended])
378 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [rx_handler_func_t.*pskb],
379 [OVS_DEFINE([HAVE_RX_HANDLER_PSKB])])
e23775f2
PS		 380 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
381 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
382 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
383 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
384 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
385 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
386
387 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
388 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
cd7330d0
PS		 389 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
390 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
e4e04c3b
JS		 391 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
392 [fragment], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
e2f3178f 393
057772cf
JS		 394 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
395 [tmpl_alloc.*conntrack_zone],
396 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
ac9cd0d2
JS		 397 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
398 [nf_ct_zone_init])
459064e7
JS		 399 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
400 [nf_connlabels_get])
057772cf 401
e2f3178f 402 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
f000c879 403 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
4aa13c0c 404
e23775f2
PS		 405 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
406 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
407 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
408 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
409 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
410
e3438006
BP		 411 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
412 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 413 [rcu_read_lock_held])])
8fa52250 414 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
cf6cb3a2 415
6a33828d
BP		 416 # Check for the proto_data_valid member in struct sk_buff. The [^@]
417 # is necessary because some versions of this header remove the
418 # member but retain the kerneldoc comment that describes it (which
419 # starts with @). The brackets must be doubled because of m4
420 # quoting rules.
e3438006 421 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 422 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
ccb75a28 423 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
e23775f2
PS		 424 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
425 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_mac_header])
426 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_network_header])
d23239a2 427 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
e23775f2
PS		 428 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_scrub_packet.*xnet],
429 [OVS_DEFINE([HAVE_SKB_SCRUB_PACKET_XNET])])
60c4904f 430 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 431 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
432 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 433 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 434 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 435 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 436 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 437 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
438 [skb_reset_tail_pointer])
e3438006
BP		 439 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
440 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 441 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 442 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 443 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 444 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 445 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 446 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 447 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 448 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 449 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 450 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 451 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 452 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
e2f3178f
PK		 453 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
454 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 455 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
456 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
75e93287
FL		 457 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
458 [OVS_DEFINE([HAVE_L4_RXHASH])])
5cce04b6 459 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370
TG		 460 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
461 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
4aa13c0c 462
e3438006 463 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 464 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 465 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 466 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 467 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
468 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 469
e3438006
BP		 470 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
471 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 472
0d03e51c
JS		 473 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
474
114fce23
SG		 475 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
476 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 477 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
705e9260 478 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
6233a1bd
TG		 479 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
480 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 481 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 482 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
483 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
484
485 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
486 [genl_multicast_group], [id])
fdce83a3 487 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
13dd4a97 488
cc1d0dea 489 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
e23775f2 490 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
8abaa53c 491 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e23775f2 492 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
2d3ef70b 493 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
a94ebc39
JS		 494 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
495 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
213e1f54
JS		 496 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
497 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
498
e3438006 499 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 500 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
501 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
502 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
dd693f9b 503 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
e3438006 504 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 505 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
6dbd98e6
SH		 506 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
507 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
4aa13c0c 508
c4e976db
JG		 509 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
510
e3438006 511 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 512 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 513 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f 514 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
e23775f2 515 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
431488e6 516
09f27436
JG		 517 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
518
f285d3e7
TG		 519 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
520 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
3174a818
TG		 521 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
522 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
e23775f2 523 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [VXLAN_HF_RCO])
f6a0c895 524 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 525 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
526 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
527 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
528 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_set_csum])
e23775f2
PS		 529 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
530 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [ipv6_v6only],
531 [OVS_DEFINE([HAVE_UDP_TUNNEL_IPV6])])
532
533 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
f6a0c895
TG		 534 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
535 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
536 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 537
21a719d6
FL		 538 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
539 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
540
595e069a
JS		 541 if test "$version" = 4 && test "$patchlevel" -le 2; then
542 OVS_DEFINE([OVS_FRAGMENT_BACKPORT])
543 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
544 OVS_DEFINE([OVS_FRAGMENT_BACKPORT])
545 fi
546
22bcc0e7
JG		 547 if cmp -s datapath/linux/kcompat.h.new \
548 datapath/linux/kcompat.h >/dev/null 2>&1; then
549 rm datapath/linux/kcompat.h.new
064af421 550 else
22bcc0e7 551 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 552 fi
553])
554
555dnl Checks for net/if_packet.h.
556AC_DEFUN([OVS_CHECK_IF_PACKET],
557 [AC_CHECK_HEADER([net/if_packet.h],
558 [HAVE_IF_PACKET=yes],
559 [HAVE_IF_PACKET=no])
560 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
561 if test "$HAVE_IF_PACKET" = yes; then
562 AC_DEFINE([HAVE_IF_PACKET], [1],
563 [Define to 1 if net/if_packet.h is available.])
564 fi])
565
f6eb6b20 566dnl Checks for net/if_dl.h.
d30e714c 567dnl
d23fa2ed
YT		 568dnl (We use this as a proxy for checking whether we're building on FreeBSD
569dnl or NetBSD.)
9360d9b7
EM		 570AC_DEFUN([OVS_CHECK_IF_DL],
571 [AC_CHECK_HEADER([net/if_dl.h],
572 [HAVE_IF_DL=yes],
573 [HAVE_IF_DL=no])
574 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
575 if test "$HAVE_IF_DL" = yes; then
576 AC_DEFINE([HAVE_IF_DL], [1],
577 [Define to 1 if net/if_dl.h is available.])
d30e714c 578
d23fa2ed 579 # On these platforms we use libpcap to access network devices.
d30e714c 580 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 581 fi])
582
e50097d2
BP		 583dnl Checks for buggy strtok_r.
584dnl
585dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
586dnl with optimization that can cause segfaults:
587dnl
588dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
589AC_DEFUN([OVS_CHECK_STRTOK_R],
590 [AC_CACHE_CHECK(
591 [whether strtok_r macro segfaults on some inputs],
592 [ovs_cv_strtok_r_bug],
593 [AC_RUN_IFELSE(
594 [AC_LANG_PROGRAM([#include <stdio.h>
595 #include <string.h>
596 ],
416e7132
BP		 597 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
598 /* Assume bug is present, because relatively minor
599 changes in compiler settings (e.g. optimization
600 level) can make it crop up. */
601 return 1;
602 #else
603 char string[] = ":::";
e50097d2
BP		 604 char *save_ptr = (char *) 0xc0ffee;
605 char *token1, *token2;
606 token1 = strtok_r(string, ":", &save_ptr);
607 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 608 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 609 printf ("%s %s\n", token1, token2);
610 return 0;
416e7132 611 #endif
e50097d2
BP		 612 ]])],
613 [ovs_cv_strtok_r_bug=no],
614 [ovs_cv_strtok_r_bug=yes],
615 [ovs_cv_strtok_r_bug=yes])])
616 if test $ovs_cv_strtok_r_bug = yes; then
617 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
618 [Define if strtok_r macro segfaults on some inputs])
619 fi
620])
621
064af421
BP		 622dnl ----------------------------------------------------------------------
623dnl These macros are from GNU PSPP, with the following original license:
624dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
625dnl This file is free software; the Free Software Foundation
626dnl gives unlimited permission to copy and/or distribute it,
627dnl with or without modifications, as long as this notice is preserved.
628
50194820 629AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
7c96151e 630 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
064af421
BP		 631 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
632 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 633 dnl Include -Werror in the compiler options, because without -Werror
634 dnl clang's GCC-compatible compiler driver does not return a failure
635 dnl exit status even though it complains about options it does not
636 dnl understand.
c2deac54
YT		 637 dnl
638 dnl Also, check stderr as gcc exits with status 0 for options
639 dnl rejected at getopt level.
640 dnl % touch /tmp/a.c
641 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
642 dnl gcc: unrecognized option '-Qunused-arguments'
643 dnl 0
644 dnl %
50194820 645 CFLAGS="$CFLAGS $WERROR $1"
c2deac54 646 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
064af421
BP		 647 CFLAGS="$ovs_save_CFLAGS"])
648 if test $ovs_cv_name = yes; then
83f6c050 649 m4_if([$2], [], [:], [$2])
064af421
BP		 650 else
651 m4_if([$3], [], [:], [$3])
652 fi
653])
654
50194820
BP		 655dnl OVS_CHECK_WERROR
656dnl
657dnl Check whether the C compiler accepts -Werror.
658dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
659AC_DEFUN([OVS_CHECK_WERROR],
660 [WERROR=
661 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
662
663dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
664dnl Check whether the given C compiler OPTION is accepted.
665dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
666AC_DEFUN([OVS_CHECK_CC_OPTION],
667 [AC_REQUIRE([OVS_CHECK_WERROR])
668 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
669
064af421
BP		 670dnl OVS_ENABLE_OPTION([OPTION])
671dnl Check whether the given C compiler OPTION is accepted.
d161c099 672dnl If so, add it to WARNING_FLAGS.
064af421
BP		 673dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
674AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 675 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
676 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 677
678dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
679dnl Check whether the given C compiler OPTION is accepted.
680dnl If so, enable the given Automake CONDITIONAL.
681
682dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
683AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
684 [OVS_CHECK_CC_OPTION(
685 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
686 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 687dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 688
689dnl Check for too-old XenServer.
690AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
691 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
692 [if test -e /etc/redhat-release; then
693 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
694 fi
695 if test -z "$ovs_cv_xsversion"; then
696 ovs_cv_xsversion=none
697 fi])
698 case $ovs_cv_xsversion in
699 none)
700 ;;
701
702 [[1-9]][[0-9]]* | dnl XenServer 10 or later
703 [[6-9]]* | dnl XenServer 6 or later
704 5.[[7-9]]* | dnl XenServer 5.7 or later
705 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
706 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
707 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
708 ;;
709
710 *)
711 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.)])
712 ;;
713 esac])
29d935d6
BP		 714
715dnl OVS_MAKE_HAS_IF([if-true], [if-false])
716dnl
717dnl Checks whether make has the GNU make $(if condition,then,else) extension.
718dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 719AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 720 [AC_CACHE_CHECK(
721 [whether ${MAKE-make} has GNU make \$(if) extension],
722 [ovs_cv_gnu_make_if],
723 [cat <<'EOF' > conftest.mk
724conftest.out:
380f86e4 725 echo $(if x,y,z) > conftest.out
29d935d6
BP		 726.PHONY: all
727EOF
728 rm -f conftest.out
729 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
730 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
731 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
732 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
733 result=`cat conftest.out`
734 rm -f conftest.mk conftest.out
735 if test "X$result" = "Xy"; then
736 ovs_cv_gnu_make_if=yes
737 else
738 ovs_cv_gnu_make_if=no
372d58a4 739 fi])])
29d935d6 740
b4e1bf8b
BP		 741dnl OVS_CHECK_GNU_MAKE
742dnl
743dnl Checks whether make is GNU make (because Linux kernel Makefiles
744dnl only work with GNU make).
745AC_DEFUN([OVS_CHECK_GNU_MAKE],
746 [AC_CACHE_CHECK(
747 [whether ${MAKE-make} is GNU make],
748 [ovs_cv_gnu_make],
749 [rm -f conftest.out
750 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
751 ${MAKE-make} --version >conftest.out 2>&1
752 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
753 result=`cat conftest.out`
754 rm -f conftest.mk conftest.out
755
756 case $result in # (
757 GNU*) ovs_cv_gnu_make=yes ;; # (
758 *) ovs_cv_gnu_make=no ;;
759 esac])
760 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
761
643c0c34
BP		 762dnl OVS_CHECK_SPARSE_TARGET
763dnl
764dnl The "cgcc" script from "sparse" isn't very good at detecting the
765dnl target for which the code is being built. This helps it out.
766AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
767 [AC_CACHE_CHECK(
768 [target hint for cgcc],
769 [ac_cv_sparse_target],
770 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
771 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
772 [x86_64-*], [ac_cv_sparse_target=x86_64],
773 [ac_cv_sparse_target=other])])
774 AS_CASE([$ac_cv_sparse_target],
775 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
776 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
777 [SPARSEFLAGS= CGCCFLAGS=])
778 AC_SUBST([SPARSEFLAGS])
779 AC_SUBST([CGCCFLAGS])])
780
32e96ab7
AZ		 781dnl OVS_SPARSE_EXTRA_INCLUDES
782dnl
783dnl The cgcc script from "sparse" does not search gcc's default
784dnl search path. Get the default search path from GCC and pass
785dnl them to sparse.
786AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
787 AC_SUBST([SPARSE_EXTRA_INCLUDES],
788 [`$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 ' ' `] ))
789
29d935d6
BP		 790dnl OVS_ENABLE_SPARSE
791AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 792 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 793 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 794 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 795 : ${SPARSE=sparse}
796 AC_SUBST([SPARSE])
797 AC_CONFIG_COMMANDS_PRE(
798 [if test $ovs_cv_gnu_make_if = yes; then
38b7a52b 799 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 800 fi])])
8a8cd0ac
BP		 801
802dnl OVS_PTHREAD_SET_NAME
803dnl
804dnl This checks for three known variants of pthreads functions for setting
805dnl the name of the current thread:
806dnl
807dnl glibc: int pthread_setname_np(pthread_t, const char *name);
808dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
809dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
810dnl
811dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
812dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
813dnl provide to it.
814dnl
815dnl This macro defines:
816dnl
817dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
818dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
819dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
820AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
821 [AC_CHECK_FUNCS([pthread_set_name_np])
822 if test $ac_cv_func_pthread_set_name_np != yes; then
823 AC_CACHE_CHECK(
824 [for pthread_setname_np() variant],
825 [ovs_cv_pthread_setname_np],
826 [AC_LINK_IFELSE(
a0903134 827 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 828 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 829 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 830 [AC_LINK_IFELSE(
a0903134 831 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 832], [pthread_setname_np(pthread_self(), "%s", "name");])],
833 [ovs_cv_pthread_setname_np=netbsd],
a0903134 834 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 835 case $ovs_cv_pthread_setname_np in # (
836 glibc)
a0903134
YT		 837 AC_DEFINE(
838 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
839 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
840 ;; # (
8a8cd0ac 841 netbsd)
a0903134
YT		 842 AC_DEFINE(
843 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
844 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
845 ;;
8a8cd0ac
BP		 846 esac
847 fi])
5020f5f0
BP		 848
849dnl OVS_CHECK_LINUX_HOST.
850dnl
851dnl Checks whether we're building for a Linux host, based on the presence of
852dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
853dnl LINUX based on the result.
854AC_DEFUN([OVS_CHECK_LINUX_HOST],
855 [AC_CACHE_CHECK(
856 [whether __linux__ is defined],
857 [ovs_cv_linux],
858 [AC_COMPILE_IFELSE(
859 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
860 [ovs_cv_linux=true],
861 [ovs_cv_linux=false])])
862 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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