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odp-util: Fix a bug in parse_flag().
[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
136 if test "$version" -ge 3; then
adfaaeac 137 if test "$version" = 3 && test "$patchlevel" -le 19; then
d76aabea
PS		 138 : # Linux 3.x
139 else
adfaaeac 140 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 3.19.x is not supported (please refer to the FAQ for advice)])
d76aabea 141 fi
71fe9970 142 else
d76aabea
PS		 143 if test "$version" -le 1 || test "$patchlevel" -le 5 || test "$sublevel" -le 31; then
144 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 2.6.32 or later is required])
7c9e113b 145 else
d76aabea 146 : # Linux 2.6.x
7c9e113b 147 fi
064af421 148 fi
2520f452
IY		 149 if (test ! -e "$KBUILD"/include/linux/version.h && \
150 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
e3438006
BP		 151 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
152 test ! -e "$KBUILD"/include/generated/autoconf.h); then
a0903134 153 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
064af421 154 fi
e3438006 155 OVS_CHECK_LINUX_COMPAT
064af421 156 fi
e3438006 157 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
064af421
BP		 158])
159
8a9562d2
PS		 160dnl OVS_CHECK_DPDK
161dnl
162dnl Configure DPDK source tree
163AC_DEFUN([OVS_CHECK_DPDK], [
164 AC_ARG_WITH([dpdk],
165 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
e2e54517 166 [Specify the DPDK build directory])])
8a9562d2
PS		 167
168 if test X"$with_dpdk" != X; then
169 RTE_SDK=$with_dpdk
170
171 DPDK_INCLUDE=$RTE_SDK/include
172 DPDK_LIB_DIR=$RTE_SDK/lib
3c94676c
DDP		 173 DPDK_LIB="-lintel_dpdk"
174 DPDK_EXTRA_LIB="-lfuse"
8a9562d2 175
95626395
TG		 176 ovs_save_CFLAGS="$CFLAGS"
177 ovs_save_LDFLAGS="$LDFLAGS"
c1223b11
DDP		 178 LDFLAGS="$LDFLAGS -L$DPDK_LIB_DIR"
179 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
180
181 # On some systems we have to add -ldl to link with dpdk
182 #
183 # This code, at first, tries to link without -ldl (""),
184 # then adds it and tries again.
185 # Before each attempt the search cache must be unset,
186 # otherwise autoconf will stick with the old result
187
188 found=false
189 save_LIBS=$LIBS
190 for extras in "" "-ldl"; do
3c94676c 191 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
c1223b11
DDP		 192 AC_LINK_IFELSE(
193 [AC_LANG_PROGRAM([#include <rte_config.h>
194 #include <rte_eal.h>],
195 [int rte_argc; char ** rte_argv;
196 rte_eal_init(rte_argc, rte_argv);])],
197 [found=true])
198 if $found; then
199 break
200 fi
201 done
202 if $found; then :; else
203 AC_MSG_ERROR([cannot link with dpdk])
204 fi
95626395
TG		 205 CFLAGS="$ovs_save_CFLAGS"
206 LDFLAGS="$ovs_save_LDFLAGS"
207 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
543342a4 208 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE -mssse3"
8a9562d2 209
3c94676c 210 # DPDK pmd drivers are not linked unless --whole-archive is used.
d7310583
DDP		 211 #
212 # This happens because the rest of the DPDK code doesn't use any symbol in
213 # the pmd driver objects, and the drivers register themselves using an
214 # __attribute__((constructor)) function.
215 #
216 # These options are specified inside a single -Wl directive to prevent
217 # autotools from reordering them.
3c94676c 218 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
9475dfeb 219 AC_SUBST([DPDK_vswitchd_LDFLAGS])
8a9562d2
PS		 220 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
221 else
222 RTE_SDK=
223 fi
224
225 AM_CONDITIONAL([DPDK_NETDEV], test -n "$RTE_SDK")
226])
227
8828e5c7 228dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 229dnl
230dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 231dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
232dnl <REGEX> translated to uppercase.
064af421
BP		 233AC_DEFUN([OVS_GREP_IFELSE], [
234 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 235 if test -f $1; then
236 grep '$2' $1 >/dev/null 2>&1
237 status=$?
238 case $status in
239 0)
240 AC_MSG_RESULT([yes])
8828e5c7 241 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48
JG		 242 ;;
243 1)
244 AC_MSG_RESULT([no])
245 $4
246 ;;
247 *)
248 AC_MSG_ERROR([grep exited with status $status])
249 ;;
250 esac
251 else
252 AC_MSG_RESULT([file not found])
253 $4
254 fi
064af421
BP		 255])
256
13dd4a97
JS		 257dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
258dnl
259dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
260dnl structure definition. If this is successful, runs IF-MATCH, otherwise
261dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
262dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
263dnl translated to uppercase.
264AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
265 AC_MSG_CHECKING([whether $2 has member $3 in $1])
266 if test -f $1; then
267 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3'
268 status=$?
269 case $status in
270 0)
271 AC_MSG_RESULT([yes])
272 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
273 ;;
274 1)
275 AC_MSG_RESULT([no])
276 $5
277 ;;
278 *)
279 AC_MSG_ERROR([grep exited with status $status])
280 ;;
281 esac
282 else
283 AC_MSG_RESULT([file not found])
284 $5
285 fi
286])
287
064af421
BP		 288dnl OVS_DEFINE(NAME)
289dnl
290dnl Defines NAME to 1 in kcompat.h.
291AC_DEFUN([OVS_DEFINE], [
22bcc0e7 292 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 293])
294
e3438006 295dnl OVS_CHECK_LINUX_COMPAT
064af421
BP		 296dnl
297dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
e3438006
BP		 298dnl the directory in $KBUILD.
299AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 300 rm -f datapath/linux/kcompat.h.new
301 mkdir -p datapath/linux
302 : > datapath/linux/kcompat.h.new
4aa13c0c 303
e3438006 304 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 305 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
306
e3438006 307 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4303ec34 308 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
4aa13c0c 309
d923a695 310 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
e2f3178f 311 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
d923a695
JG		 312
313 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
314
e3438006 315 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
2ea82414
PS		 316 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
317 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
13dd4a97
JS		 318 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
319 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
4aa13c0c 320
e3438006
BP		 321 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
322 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
323 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
42d5dd95
TG		 324 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
325 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
d1890de5 326 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
e2f3178f
PK		 327 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats])
328
329 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
4aa13c0c 330
e3438006
BP		 331 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
332 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 333 [rcu_read_lock_held])])
8fa52250 334 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
cf6cb3a2 335
6a33828d
BP		 336 # Check for the proto_data_valid member in struct sk_buff. The [^@]
337 # is necessary because some versions of this header remove the
338 # member but retain the kerneldoc comment that describes it (which
339 # starts with @). The brackets must be doubled because of m4
340 # quoting rules.
e3438006 341 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 342 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
60c4904f 343 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 344 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
345 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 346 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 347 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 348 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 349 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 350 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
351 [skb_reset_tail_pointer])
e3438006
BP		 352 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
353 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 354 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 355 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 356 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 357 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 358 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 359 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 360 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 361 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 362 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 363 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 364 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 365 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
e2f3178f
PK		 366 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
367 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 368 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
369 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
9bbf88b2 370 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [l4_rxhash])
5cce04b6 371 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370
TG		 372 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
373 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
4aa13c0c 374
e3438006 375 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 376 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 377 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 378 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 379 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
380 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 381
e3438006
BP		 382 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
383 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 384
114fce23
SG		 385 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
386 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 387 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
705e9260 388 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
6233a1bd
TG		 389 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
390 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 391 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 392 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
393 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
394
395 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
396 [genl_multicast_group], [id])
397
cc1d0dea 398 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
8abaa53c 399 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e3438006 400 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 401 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
402 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
403 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
e3438006 404 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 405 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
4aa13c0c 406
c4e976db
JG		 407 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
408
e3438006 409 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 410 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 411 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f
TG		 412 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
413
431488e6 414
09f27436
JG		 415 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
416
f285d3e7
TG		 417 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
418 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
3174a818
TG		 419 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
420 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
f6a0c895 421 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 422 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
423 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
424 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
425 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_set_csum])
f6a0c895
TG		 426 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df:1],
427 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
13dd4a97
JS		 428 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_GRE_CSUM],
429 [OVS_DEFINE([HAVE_SKB_GSO_GRE_CSUM])])
430 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_UDP_TUNNEL_CSUM],
431 [OVS_DEFINE([HAVE_SKB_GSO_UDP_TUNNEL_CSUM])])
f6a0c895
TG		 432 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
433 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 434
22bcc0e7
JG		 435 if cmp -s datapath/linux/kcompat.h.new \
436 datapath/linux/kcompat.h >/dev/null 2>&1; then
437 rm datapath/linux/kcompat.h.new
064af421 438 else
22bcc0e7 439 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 440 fi
441])
442
443dnl Checks for net/if_packet.h.
444AC_DEFUN([OVS_CHECK_IF_PACKET],
445 [AC_CHECK_HEADER([net/if_packet.h],
446 [HAVE_IF_PACKET=yes],
447 [HAVE_IF_PACKET=no])
448 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
449 if test "$HAVE_IF_PACKET" = yes; then
450 AC_DEFINE([HAVE_IF_PACKET], [1],
451 [Define to 1 if net/if_packet.h is available.])
452 fi])
453
f6eb6b20 454dnl Checks for net/if_dl.h.
d30e714c 455dnl
d23fa2ed
YT		 456dnl (We use this as a proxy for checking whether we're building on FreeBSD
457dnl or NetBSD.)
9360d9b7
EM		 458AC_DEFUN([OVS_CHECK_IF_DL],
459 [AC_CHECK_HEADER([net/if_dl.h],
460 [HAVE_IF_DL=yes],
461 [HAVE_IF_DL=no])
462 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
463 if test "$HAVE_IF_DL" = yes; then
464 AC_DEFINE([HAVE_IF_DL], [1],
465 [Define to 1 if net/if_dl.h is available.])
d30e714c 466
d23fa2ed 467 # On these platforms we use libpcap to access network devices.
d30e714c 468 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 469 fi])
470
e50097d2
BP		 471dnl Checks for buggy strtok_r.
472dnl
473dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
474dnl with optimization that can cause segfaults:
475dnl
476dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
477AC_DEFUN([OVS_CHECK_STRTOK_R],
478 [AC_CACHE_CHECK(
479 [whether strtok_r macro segfaults on some inputs],
480 [ovs_cv_strtok_r_bug],
481 [AC_RUN_IFELSE(
482 [AC_LANG_PROGRAM([#include <stdio.h>
483 #include <string.h>
484 ],
416e7132
BP		 485 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
486 /* Assume bug is present, because relatively minor
487 changes in compiler settings (e.g. optimization
488 level) can make it crop up. */
489 return 1;
490 #else
491 char string[] = ":::";
e50097d2
BP		 492 char *save_ptr = (char *) 0xc0ffee;
493 char *token1, *token2;
494 token1 = strtok_r(string, ":", &save_ptr);
495 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 496 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 497 printf ("%s %s\n", token1, token2);
498 return 0;
416e7132 499 #endif
e50097d2
BP		 500 ]])],
501 [ovs_cv_strtok_r_bug=no],
502 [ovs_cv_strtok_r_bug=yes],
503 [ovs_cv_strtok_r_bug=yes])])
504 if test $ovs_cv_strtok_r_bug = yes; then
505 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
506 [Define if strtok_r macro segfaults on some inputs])
507 fi
508])
509
064af421
BP		 510dnl ----------------------------------------------------------------------
511dnl These macros are from GNU PSPP, with the following original license:
512dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
513dnl This file is free software; the Free Software Foundation
514dnl gives unlimited permission to copy and/or distribute it,
515dnl with or without modifications, as long as this notice is preserved.
516
50194820 517AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
7c96151e 518 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
064af421
BP		 519 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
520 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 521 dnl Include -Werror in the compiler options, because without -Werror
522 dnl clang's GCC-compatible compiler driver does not return a failure
523 dnl exit status even though it complains about options it does not
524 dnl understand.
c2deac54
YT		 525 dnl
526 dnl Also, check stderr as gcc exits with status 0 for options
527 dnl rejected at getopt level.
528 dnl % touch /tmp/a.c
529 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
530 dnl gcc: unrecognized option '-Qunused-arguments'
531 dnl 0
532 dnl %
50194820 533 CFLAGS="$CFLAGS $WERROR $1"
c2deac54 534 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
064af421
BP		 535 CFLAGS="$ovs_save_CFLAGS"])
536 if test $ovs_cv_name = yes; then
83f6c050 537 m4_if([$2], [], [:], [$2])
064af421
BP		 538 else
539 m4_if([$3], [], [:], [$3])
540 fi
541])
542
50194820
BP		 543dnl OVS_CHECK_WERROR
544dnl
545dnl Check whether the C compiler accepts -Werror.
546dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
547AC_DEFUN([OVS_CHECK_WERROR],
548 [WERROR=
549 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
550
551dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
552dnl Check whether the given C compiler OPTION is accepted.
553dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
554AC_DEFUN([OVS_CHECK_CC_OPTION],
555 [AC_REQUIRE([OVS_CHECK_WERROR])
556 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
557
064af421
BP		 558dnl OVS_ENABLE_OPTION([OPTION])
559dnl Check whether the given C compiler OPTION is accepted.
d161c099 560dnl If so, add it to WARNING_FLAGS.
064af421
BP		 561dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
562AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 563 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
564 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 565
566dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
567dnl Check whether the given C compiler OPTION is accepted.
568dnl If so, enable the given Automake CONDITIONAL.
569
570dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
571AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
572 [OVS_CHECK_CC_OPTION(
573 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
574 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 575dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 576
577dnl Check for too-old XenServer.
578AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
579 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
580 [if test -e /etc/redhat-release; then
581 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
582 fi
583 if test -z "$ovs_cv_xsversion"; then
584 ovs_cv_xsversion=none
585 fi])
586 case $ovs_cv_xsversion in
587 none)
588 ;;
589
590 [[1-9]][[0-9]]* | dnl XenServer 10 or later
591 [[6-9]]* | dnl XenServer 6 or later
592 5.[[7-9]]* | dnl XenServer 5.7 or later
593 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
594 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
595 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
596 ;;
597
598 *)
599 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.)])
600 ;;
601 esac])
29d935d6
BP		 602
603dnl OVS_MAKE_HAS_IF([if-true], [if-false])
604dnl
605dnl Checks whether make has the GNU make $(if condition,then,else) extension.
606dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 607AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 608 [AC_CACHE_CHECK(
609 [whether ${MAKE-make} has GNU make \$(if) extension],
610 [ovs_cv_gnu_make_if],
611 [cat <<'EOF' > conftest.mk
612conftest.out:
380f86e4 613 echo $(if x,y,z) > conftest.out
29d935d6
BP		 614.PHONY: all
615EOF
616 rm -f conftest.out
617 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
618 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
619 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
620 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
621 result=`cat conftest.out`
622 rm -f conftest.mk conftest.out
623 if test "X$result" = "Xy"; then
624 ovs_cv_gnu_make_if=yes
625 else
626 ovs_cv_gnu_make_if=no
372d58a4 627 fi])])
29d935d6 628
b4e1bf8b
BP		 629dnl OVS_CHECK_GNU_MAKE
630dnl
631dnl Checks whether make is GNU make (because Linux kernel Makefiles
632dnl only work with GNU make).
633AC_DEFUN([OVS_CHECK_GNU_MAKE],
634 [AC_CACHE_CHECK(
635 [whether ${MAKE-make} is GNU make],
636 [ovs_cv_gnu_make],
637 [rm -f conftest.out
638 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
639 ${MAKE-make} --version >conftest.out 2>&1
640 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
641 result=`cat conftest.out`
642 rm -f conftest.mk conftest.out
643
644 case $result in # (
645 GNU*) ovs_cv_gnu_make=yes ;; # (
646 *) ovs_cv_gnu_make=no ;;
647 esac])
648 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
649
643c0c34
BP		 650dnl OVS_CHECK_SPARSE_TARGET
651dnl
652dnl The "cgcc" script from "sparse" isn't very good at detecting the
653dnl target for which the code is being built. This helps it out.
654AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
655 [AC_CACHE_CHECK(
656 [target hint for cgcc],
657 [ac_cv_sparse_target],
658 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
659 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
660 [x86_64-*], [ac_cv_sparse_target=x86_64],
661 [ac_cv_sparse_target=other])])
662 AS_CASE([$ac_cv_sparse_target],
663 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
664 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
665 [SPARSEFLAGS= CGCCFLAGS=])
666 AC_SUBST([SPARSEFLAGS])
667 AC_SUBST([CGCCFLAGS])])
668
32e96ab7
AZ		 669dnl OVS_SPARSE_EXTRA_INCLUDES
670dnl
671dnl The cgcc script from "sparse" does not search gcc's default
672dnl search path. Get the default search path from GCC and pass
673dnl them to sparse.
674AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
675 AC_SUBST([SPARSE_EXTRA_INCLUDES],
676 [`$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 ' ' `] ))
677
29d935d6
BP		 678dnl OVS_ENABLE_SPARSE
679AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 680 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 681 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 682 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 683 : ${SPARSE=sparse}
684 AC_SUBST([SPARSE])
685 AC_CONFIG_COMMANDS_PRE(
686 [if test $ovs_cv_gnu_make_if = yes; then
38b7a52b 687 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 688 fi])])
8a8cd0ac
BP		 689
690dnl OVS_PTHREAD_SET_NAME
691dnl
692dnl This checks for three known variants of pthreads functions for setting
693dnl the name of the current thread:
694dnl
695dnl glibc: int pthread_setname_np(pthread_t, const char *name);
696dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
697dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
698dnl
699dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
700dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
701dnl provide to it.
702dnl
703dnl This macro defines:
704dnl
705dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
706dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
707dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
708AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
709 [AC_CHECK_FUNCS([pthread_set_name_np])
710 if test $ac_cv_func_pthread_set_name_np != yes; then
711 AC_CACHE_CHECK(
712 [for pthread_setname_np() variant],
713 [ovs_cv_pthread_setname_np],
714 [AC_LINK_IFELSE(
a0903134 715 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 716 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 717 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 718 [AC_LINK_IFELSE(
a0903134 719 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 720], [pthread_setname_np(pthread_self(), "%s", "name");])],
721 [ovs_cv_pthread_setname_np=netbsd],
a0903134 722 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 723 case $ovs_cv_pthread_setname_np in # (
724 glibc)
a0903134
YT		 725 AC_DEFINE(
726 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
727 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
728 ;; # (
8a8cd0ac 729 netbsd)
a0903134
YT		 730 AC_DEFINE(
731 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
732 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
733 ;;
8a8cd0ac
BP		 734 esac
735 fi])
5020f5f0
BP		 736
737dnl OVS_CHECK_LINUX_HOST.
738dnl
739dnl Checks whether we're building for a Linux host, based on the presence of
740dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
741dnl LINUX based on the result.
742AC_DEFUN([OVS_CHECK_LINUX_HOST],
743 [AC_CACHE_CHECK(
744 [whether __linux__ is defined],
745 [ovs_cv_linux],
746 [AC_COMPILE_IFELSE(
747 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
748 [ovs_cv_linux=true],
749 [ovs_cv_linux=false])])
750 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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