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AUTHORS: Add Sairam Venugopal
[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])
2ea82414
PS		 327 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
328 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
13dd4a97
JS		 329 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
330 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
4aa13c0c 331
e3438006
BP		 332 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
333 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
334 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
42d5dd95
TG		 335 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
336 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
d1890de5 337 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
e2f3178f 338 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats])
cd7330d0
PS		 339 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
340 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
e2f3178f
PK		 341
342 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
4aa13c0c 343
e3438006
BP		 344 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
345 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 346 [rcu_read_lock_held])])
8fa52250 347 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
cf6cb3a2 348
6a33828d
BP		 349 # Check for the proto_data_valid member in struct sk_buff. The [^@]
350 # is necessary because some versions of this header remove the
351 # member but retain the kerneldoc comment that describes it (which
352 # starts with @). The brackets must be doubled because of m4
353 # quoting rules.
e3438006 354 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 355 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
d23239a2 356 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
60c4904f 357 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 358 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
359 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 360 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 361 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 362 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 363 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 364 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
365 [skb_reset_tail_pointer])
e3438006
BP		 366 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
367 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 368 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 369 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 370 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 371 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 372 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 373 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 374 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 375 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 376 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 377 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 378 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 379 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
e2f3178f
PK		 380 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
381 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 382 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
383 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
9bbf88b2 384 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [l4_rxhash])
5cce04b6 385 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370
TG		 386 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
387 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
4aa13c0c 388
e3438006 389 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 390 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 391 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 392 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 393 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
394 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 395
e3438006
BP		 396 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
397 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 398
114fce23
SG		 399 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
400 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 401 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
705e9260 402 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
6233a1bd
TG		 403 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
404 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 405 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 406 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
407 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
408
409 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
410 [genl_multicast_group], [id])
411
cc1d0dea 412 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
8abaa53c 413 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e3438006 414 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 415 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
416 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
417 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
e3438006 418 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 419 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
4aa13c0c 420
c4e976db
JG		 421 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
422
e3438006 423 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 424 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 425 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f
TG		 426 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
427
431488e6 428
09f27436
JG		 429 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
430
f285d3e7
TG		 431 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
432 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
3174a818
TG		 433 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
434 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
f6a0c895 435 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 436 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
437 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
438 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
439 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_set_csum])
f6a0c895
TG		 440 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df:1],
441 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
13dd4a97
JS		 442 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_GRE_CSUM],
443 [OVS_DEFINE([HAVE_SKB_GSO_GRE_CSUM])])
444 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_UDP_TUNNEL_CSUM],
445 [OVS_DEFINE([HAVE_SKB_GSO_UDP_TUNNEL_CSUM])])
f6a0c895
TG		 446 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
447 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 448
22bcc0e7
JG		 449 if cmp -s datapath/linux/kcompat.h.new \
450 datapath/linux/kcompat.h >/dev/null 2>&1; then
451 rm datapath/linux/kcompat.h.new
064af421 452 else
22bcc0e7 453 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 454 fi
455])
456
457dnl Checks for net/if_packet.h.
458AC_DEFUN([OVS_CHECK_IF_PACKET],
459 [AC_CHECK_HEADER([net/if_packet.h],
460 [HAVE_IF_PACKET=yes],
461 [HAVE_IF_PACKET=no])
462 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
463 if test "$HAVE_IF_PACKET" = yes; then
464 AC_DEFINE([HAVE_IF_PACKET], [1],
465 [Define to 1 if net/if_packet.h is available.])
466 fi])
467
f6eb6b20 468dnl Checks for net/if_dl.h.
d30e714c 469dnl
d23fa2ed
YT		 470dnl (We use this as a proxy for checking whether we're building on FreeBSD
471dnl or NetBSD.)
9360d9b7
EM		 472AC_DEFUN([OVS_CHECK_IF_DL],
473 [AC_CHECK_HEADER([net/if_dl.h],
474 [HAVE_IF_DL=yes],
475 [HAVE_IF_DL=no])
476 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
477 if test "$HAVE_IF_DL" = yes; then
478 AC_DEFINE([HAVE_IF_DL], [1],
479 [Define to 1 if net/if_dl.h is available.])
d30e714c 480
d23fa2ed 481 # On these platforms we use libpcap to access network devices.
d30e714c 482 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 483 fi])
484
e50097d2
BP		 485dnl Checks for buggy strtok_r.
486dnl
487dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
488dnl with optimization that can cause segfaults:
489dnl
490dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
491AC_DEFUN([OVS_CHECK_STRTOK_R],
492 [AC_CACHE_CHECK(
493 [whether strtok_r macro segfaults on some inputs],
494 [ovs_cv_strtok_r_bug],
495 [AC_RUN_IFELSE(
496 [AC_LANG_PROGRAM([#include <stdio.h>
497 #include <string.h>
498 ],
416e7132
BP		 499 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
500 /* Assume bug is present, because relatively minor
501 changes in compiler settings (e.g. optimization
502 level) can make it crop up. */
503 return 1;
504 #else
505 char string[] = ":::";
e50097d2
BP		 506 char *save_ptr = (char *) 0xc0ffee;
507 char *token1, *token2;
508 token1 = strtok_r(string, ":", &save_ptr);
509 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 510 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 511 printf ("%s %s\n", token1, token2);
512 return 0;
416e7132 513 #endif
e50097d2
BP		 514 ]])],
515 [ovs_cv_strtok_r_bug=no],
516 [ovs_cv_strtok_r_bug=yes],
517 [ovs_cv_strtok_r_bug=yes])])
518 if test $ovs_cv_strtok_r_bug = yes; then
519 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
520 [Define if strtok_r macro segfaults on some inputs])
521 fi
522])
523
064af421
BP		 524dnl ----------------------------------------------------------------------
525dnl These macros are from GNU PSPP, with the following original license:
526dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
527dnl This file is free software; the Free Software Foundation
528dnl gives unlimited permission to copy and/or distribute it,
529dnl with or without modifications, as long as this notice is preserved.
530
50194820 531AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
7c96151e 532 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
064af421
BP		 533 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
534 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 535 dnl Include -Werror in the compiler options, because without -Werror
536 dnl clang's GCC-compatible compiler driver does not return a failure
537 dnl exit status even though it complains about options it does not
538 dnl understand.
c2deac54
YT		 539 dnl
540 dnl Also, check stderr as gcc exits with status 0 for options
541 dnl rejected at getopt level.
542 dnl % touch /tmp/a.c
543 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
544 dnl gcc: unrecognized option '-Qunused-arguments'
545 dnl 0
546 dnl %
50194820 547 CFLAGS="$CFLAGS $WERROR $1"
c2deac54 548 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
064af421
BP		 549 CFLAGS="$ovs_save_CFLAGS"])
550 if test $ovs_cv_name = yes; then
83f6c050 551 m4_if([$2], [], [:], [$2])
064af421
BP		 552 else
553 m4_if([$3], [], [:], [$3])
554 fi
555])
556
50194820
BP		 557dnl OVS_CHECK_WERROR
558dnl
559dnl Check whether the C compiler accepts -Werror.
560dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
561AC_DEFUN([OVS_CHECK_WERROR],
562 [WERROR=
563 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
564
565dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
566dnl Check whether the given C compiler OPTION is accepted.
567dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
568AC_DEFUN([OVS_CHECK_CC_OPTION],
569 [AC_REQUIRE([OVS_CHECK_WERROR])
570 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
571
064af421
BP		 572dnl OVS_ENABLE_OPTION([OPTION])
573dnl Check whether the given C compiler OPTION is accepted.
d161c099 574dnl If so, add it to WARNING_FLAGS.
064af421
BP		 575dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
576AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 577 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
578 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 579
580dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
581dnl Check whether the given C compiler OPTION is accepted.
582dnl If so, enable the given Automake CONDITIONAL.
583
584dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
585AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
586 [OVS_CHECK_CC_OPTION(
587 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
588 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 589dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 590
591dnl Check for too-old XenServer.
592AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
593 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
594 [if test -e /etc/redhat-release; then
595 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
596 fi
597 if test -z "$ovs_cv_xsversion"; then
598 ovs_cv_xsversion=none
599 fi])
600 case $ovs_cv_xsversion in
601 none)
602 ;;
603
604 [[1-9]][[0-9]]* | dnl XenServer 10 or later
605 [[6-9]]* | dnl XenServer 6 or later
606 5.[[7-9]]* | dnl XenServer 5.7 or later
607 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
608 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
609 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
610 ;;
611
612 *)
613 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.)])
614 ;;
615 esac])
29d935d6
BP		 616
617dnl OVS_MAKE_HAS_IF([if-true], [if-false])
618dnl
619dnl Checks whether make has the GNU make $(if condition,then,else) extension.
620dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 621AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 622 [AC_CACHE_CHECK(
623 [whether ${MAKE-make} has GNU make \$(if) extension],
624 [ovs_cv_gnu_make_if],
625 [cat <<'EOF' > conftest.mk
626conftest.out:
380f86e4 627 echo $(if x,y,z) > conftest.out
29d935d6
BP		 628.PHONY: all
629EOF
630 rm -f conftest.out
631 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
632 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
633 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
634 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
635 result=`cat conftest.out`
636 rm -f conftest.mk conftest.out
637 if test "X$result" = "Xy"; then
638 ovs_cv_gnu_make_if=yes
639 else
640 ovs_cv_gnu_make_if=no
372d58a4 641 fi])])
29d935d6 642
b4e1bf8b
BP		 643dnl OVS_CHECK_GNU_MAKE
644dnl
645dnl Checks whether make is GNU make (because Linux kernel Makefiles
646dnl only work with GNU make).
647AC_DEFUN([OVS_CHECK_GNU_MAKE],
648 [AC_CACHE_CHECK(
649 [whether ${MAKE-make} is GNU make],
650 [ovs_cv_gnu_make],
651 [rm -f conftest.out
652 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
653 ${MAKE-make} --version >conftest.out 2>&1
654 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
655 result=`cat conftest.out`
656 rm -f conftest.mk conftest.out
657
658 case $result in # (
659 GNU*) ovs_cv_gnu_make=yes ;; # (
660 *) ovs_cv_gnu_make=no ;;
661 esac])
662 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
663
643c0c34
BP		 664dnl OVS_CHECK_SPARSE_TARGET
665dnl
666dnl The "cgcc" script from "sparse" isn't very good at detecting the
667dnl target for which the code is being built. This helps it out.
668AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
669 [AC_CACHE_CHECK(
670 [target hint for cgcc],
671 [ac_cv_sparse_target],
672 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
673 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
674 [x86_64-*], [ac_cv_sparse_target=x86_64],
675 [ac_cv_sparse_target=other])])
676 AS_CASE([$ac_cv_sparse_target],
677 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
678 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
679 [SPARSEFLAGS= CGCCFLAGS=])
680 AC_SUBST([SPARSEFLAGS])
681 AC_SUBST([CGCCFLAGS])])
682
32e96ab7
AZ		 683dnl OVS_SPARSE_EXTRA_INCLUDES
684dnl
685dnl The cgcc script from "sparse" does not search gcc's default
686dnl search path. Get the default search path from GCC and pass
687dnl them to sparse.
688AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
689 AC_SUBST([SPARSE_EXTRA_INCLUDES],
690 [`$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 ' ' `] ))
691
29d935d6
BP		 692dnl OVS_ENABLE_SPARSE
693AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 694 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 695 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 696 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 697 : ${SPARSE=sparse}
698 AC_SUBST([SPARSE])
699 AC_CONFIG_COMMANDS_PRE(
700 [if test $ovs_cv_gnu_make_if = yes; then
38b7a52b 701 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 702 fi])])
8a8cd0ac
BP		 703
704dnl OVS_PTHREAD_SET_NAME
705dnl
706dnl This checks for three known variants of pthreads functions for setting
707dnl the name of the current thread:
708dnl
709dnl glibc: int pthread_setname_np(pthread_t, const char *name);
710dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
711dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
712dnl
713dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
714dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
715dnl provide to it.
716dnl
717dnl This macro defines:
718dnl
719dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
720dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
721dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
722AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
723 [AC_CHECK_FUNCS([pthread_set_name_np])
724 if test $ac_cv_func_pthread_set_name_np != yes; then
725 AC_CACHE_CHECK(
726 [for pthread_setname_np() variant],
727 [ovs_cv_pthread_setname_np],
728 [AC_LINK_IFELSE(
a0903134 729 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 730 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 731 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 732 [AC_LINK_IFELSE(
a0903134 733 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 734], [pthread_setname_np(pthread_self(), "%s", "name");])],
735 [ovs_cv_pthread_setname_np=netbsd],
a0903134 736 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 737 case $ovs_cv_pthread_setname_np in # (
738 glibc)
a0903134
YT		 739 AC_DEFINE(
740 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
741 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
742 ;; # (
8a8cd0ac 743 netbsd)
a0903134
YT		 744 AC_DEFINE(
745 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
746 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
747 ;;
8a8cd0ac
BP		 748 esac
749 fi])
5020f5f0
BP		 750
751dnl OVS_CHECK_LINUX_HOST.
752dnl
753dnl Checks whether we're building for a Linux host, based on the presence of
754dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
755dnl LINUX based on the result.
756AC_DEFUN([OVS_CHECK_LINUX_HOST],
757 [AC_CACHE_CHECK(
758 [whether __linux__ is defined],
759 [ovs_cv_linux],
760 [AC_COMPILE_IFELSE(
761 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
762 [ovs_cv_linux=true],
763 [ovs_cv_linux=false])])
764 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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