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INSTALL.DPDK: Notes on running ovs-vswitchd/dpdk inside a VM
[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
DDP		 175 DPDK_LIB="-lintel_dpdk"
176 DPDK_EXTRA_LIB="-lfuse"
8a9562d2 177
95626395
TG		 178 ovs_save_CFLAGS="$CFLAGS"
179 ovs_save_LDFLAGS="$LDFLAGS"
c1223b11
DDP		 180 LDFLAGS="$LDFLAGS -L$DPDK_LIB_DIR"
181 CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
182
183 # On some systems we have to add -ldl to link with dpdk
184 #
185 # This code, at first, tries to link without -ldl (""),
186 # then adds it and tries again.
187 # Before each attempt the search cache must be unset,
188 # otherwise autoconf will stick with the old result
189
190 found=false
191 save_LIBS=$LIBS
192 for extras in "" "-ldl"; do
3c94676c 193 LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
c1223b11
DDP		 194 AC_LINK_IFELSE(
195 [AC_LANG_PROGRAM([#include <rte_config.h>
196 #include <rte_eal.h>],
197 [int rte_argc; char ** rte_argv;
198 rte_eal_init(rte_argc, rte_argv);])],
199 [found=true])
200 if $found; then
201 break
202 fi
203 done
204 if $found; then :; else
205 AC_MSG_ERROR([cannot link with dpdk])
206 fi
95626395
TG		 207 CFLAGS="$ovs_save_CFLAGS"
208 LDFLAGS="$ovs_save_LDFLAGS"
209 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
543342a4 210 OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE -mssse3"
8a9562d2 211
3c94676c 212 # DPDK pmd drivers are not linked unless --whole-archive is used.
d7310583
DDP		 213 #
214 # This happens because the rest of the DPDK code doesn't use any symbol in
215 # the pmd driver objects, and the drivers register themselves using an
216 # __attribute__((constructor)) function.
217 #
218 # These options are specified inside a single -Wl directive to prevent
219 # autotools from reordering them.
3c94676c 220 DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
9475dfeb 221 AC_SUBST([DPDK_vswitchd_LDFLAGS])
8a9562d2
PS		 222 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
223 else
224 RTE_SDK=
225 fi
226
227 AM_CONDITIONAL([DPDK_NETDEV], test -n "$RTE_SDK")
228])
229
8828e5c7 230dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 231dnl
232dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 233dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
234dnl <REGEX> translated to uppercase.
064af421
BP		 235AC_DEFUN([OVS_GREP_IFELSE], [
236 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 237 if test -f $1; then
238 grep '$2' $1 >/dev/null 2>&1
239 status=$?
240 case $status in
241 0)
242 AC_MSG_RESULT([yes])
8828e5c7 243 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48
JG		 244 ;;
245 1)
246 AC_MSG_RESULT([no])
247 $4
248 ;;
249 *)
250 AC_MSG_ERROR([grep exited with status $status])
251 ;;
252 esac
253 else
254 AC_MSG_RESULT([file not found])
255 $4
256 fi
064af421
BP		 257])
258
13dd4a97
JS		 259dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
260dnl
261dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
262dnl structure definition. If this is successful, runs IF-MATCH, otherwise
263dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
264dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
265dnl translated to uppercase.
266AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
267 AC_MSG_CHECKING([whether $2 has member $3 in $1])
268 if test -f $1; then
269 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3'
270 status=$?
271 case $status in
272 0)
273 AC_MSG_RESULT([yes])
274 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
275 ;;
276 1)
277 AC_MSG_RESULT([no])
278 $5
279 ;;
280 *)
281 AC_MSG_ERROR([grep exited with status $status])
282 ;;
283 esac
284 else
285 AC_MSG_RESULT([file not found])
286 $5
287 fi
288])
289
064af421
BP		 290dnl OVS_DEFINE(NAME)
291dnl
292dnl Defines NAME to 1 in kcompat.h.
293AC_DEFUN([OVS_DEFINE], [
22bcc0e7 294 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 295])
296
e3438006 297dnl OVS_CHECK_LINUX_COMPAT
064af421
BP		 298dnl
299dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
e3438006
BP		 300dnl the directory in $KBUILD.
301AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 302 rm -f datapath/linux/kcompat.h.new
303 mkdir -p datapath/linux
304 : > datapath/linux/kcompat.h.new
4aa13c0c 305
e3438006 306 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 307 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
308
e3438006 309 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4303ec34 310 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
4aa13c0c 311
d923a695 312 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
e2f3178f 313 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
d923a695
JG		 314
315 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
316
e3438006 317 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
2ea82414
PS		 318 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
319 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
13dd4a97
JS		 320 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
321 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
4aa13c0c 322
e3438006
BP		 323 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
324 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
325 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
42d5dd95
TG		 326 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
327 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
d1890de5 328 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
e2f3178f 329 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats])
cd7330d0
PS		 330 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
331 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
e2f3178f
PK		 332
333 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
4aa13c0c 334
e3438006
BP		 335 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
336 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 337 [rcu_read_lock_held])])
8fa52250 338 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
cf6cb3a2 339
6a33828d
BP		 340 # Check for the proto_data_valid member in struct sk_buff. The [^@]
341 # is necessary because some versions of this header remove the
342 # member but retain the kerneldoc comment that describes it (which
343 # starts with @). The brackets must be doubled because of m4
344 # quoting rules.
e3438006 345 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 346 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
60c4904f 347 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 348 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
349 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 350 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 351 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 352 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 353 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 354 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
355 [skb_reset_tail_pointer])
e3438006
BP		 356 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
357 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 358 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 359 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 360 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 361 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 362 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 363 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 364 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 365 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 366 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 367 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 368 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 369 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
e2f3178f
PK		 370 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
371 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 372 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
373 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
9bbf88b2 374 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [l4_rxhash])
5cce04b6 375 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370
TG		 376 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
377 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
4aa13c0c 378
e3438006 379 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 380 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 381 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 382 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 383 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
384 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 385
e3438006
BP		 386 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
387 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 388
114fce23
SG		 389 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
390 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 391 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
705e9260 392 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
6233a1bd
TG		 393 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
394 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 395 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 396 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
397 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
398
399 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
400 [genl_multicast_group], [id])
401
cc1d0dea 402 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
8abaa53c 403 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e3438006 404 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 405 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
406 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
407 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
e3438006 408 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 409 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
4aa13c0c 410
c4e976db
JG		 411 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
412
e3438006 413 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 414 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 415 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f
TG		 416 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
417
431488e6 418
09f27436
JG		 419 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
420
f285d3e7
TG		 421 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
422 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
3174a818
TG		 423 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
424 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
f6a0c895 425 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 426 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
427 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
428 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
429 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_set_csum])
f6a0c895
TG		 430 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df:1],
431 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
13dd4a97
JS		 432 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_GRE_CSUM],
433 [OVS_DEFINE([HAVE_SKB_GSO_GRE_CSUM])])
434 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_UDP_TUNNEL_CSUM],
435 [OVS_DEFINE([HAVE_SKB_GSO_UDP_TUNNEL_CSUM])])
f6a0c895
TG		 436 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
437 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 438
22bcc0e7
JG		 439 if cmp -s datapath/linux/kcompat.h.new \
440 datapath/linux/kcompat.h >/dev/null 2>&1; then
441 rm datapath/linux/kcompat.h.new
064af421 442 else
22bcc0e7 443 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 444 fi
445])
446
447dnl Checks for net/if_packet.h.
448AC_DEFUN([OVS_CHECK_IF_PACKET],
449 [AC_CHECK_HEADER([net/if_packet.h],
450 [HAVE_IF_PACKET=yes],
451 [HAVE_IF_PACKET=no])
452 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
453 if test "$HAVE_IF_PACKET" = yes; then
454 AC_DEFINE([HAVE_IF_PACKET], [1],
455 [Define to 1 if net/if_packet.h is available.])
456 fi])
457
f6eb6b20 458dnl Checks for net/if_dl.h.
d30e714c 459dnl
d23fa2ed
YT		 460dnl (We use this as a proxy for checking whether we're building on FreeBSD
461dnl or NetBSD.)
9360d9b7
EM		 462AC_DEFUN([OVS_CHECK_IF_DL],
463 [AC_CHECK_HEADER([net/if_dl.h],
464 [HAVE_IF_DL=yes],
465 [HAVE_IF_DL=no])
466 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
467 if test "$HAVE_IF_DL" = yes; then
468 AC_DEFINE([HAVE_IF_DL], [1],
469 [Define to 1 if net/if_dl.h is available.])
d30e714c 470
d23fa2ed 471 # On these platforms we use libpcap to access network devices.
d30e714c 472 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 473 fi])
474
e50097d2
BP		 475dnl Checks for buggy strtok_r.
476dnl
477dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
478dnl with optimization that can cause segfaults:
479dnl
480dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
481AC_DEFUN([OVS_CHECK_STRTOK_R],
482 [AC_CACHE_CHECK(
483 [whether strtok_r macro segfaults on some inputs],
484 [ovs_cv_strtok_r_bug],
485 [AC_RUN_IFELSE(
486 [AC_LANG_PROGRAM([#include <stdio.h>
487 #include <string.h>
488 ],
416e7132
BP		 489 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
490 /* Assume bug is present, because relatively minor
491 changes in compiler settings (e.g. optimization
492 level) can make it crop up. */
493 return 1;
494 #else
495 char string[] = ":::";
e50097d2
BP		 496 char *save_ptr = (char *) 0xc0ffee;
497 char *token1, *token2;
498 token1 = strtok_r(string, ":", &save_ptr);
499 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 500 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 501 printf ("%s %s\n", token1, token2);
502 return 0;
416e7132 503 #endif
e50097d2
BP		 504 ]])],
505 [ovs_cv_strtok_r_bug=no],
506 [ovs_cv_strtok_r_bug=yes],
507 [ovs_cv_strtok_r_bug=yes])])
508 if test $ovs_cv_strtok_r_bug = yes; then
509 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
510 [Define if strtok_r macro segfaults on some inputs])
511 fi
512])
513
064af421
BP		 514dnl ----------------------------------------------------------------------
515dnl These macros are from GNU PSPP, with the following original license:
516dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
517dnl This file is free software; the Free Software Foundation
518dnl gives unlimited permission to copy and/or distribute it,
519dnl with or without modifications, as long as this notice is preserved.
520
50194820 521AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
7c96151e 522 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
064af421
BP		 523 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
524 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 525 dnl Include -Werror in the compiler options, because without -Werror
526 dnl clang's GCC-compatible compiler driver does not return a failure
527 dnl exit status even though it complains about options it does not
528 dnl understand.
c2deac54
YT		 529 dnl
530 dnl Also, check stderr as gcc exits with status 0 for options
531 dnl rejected at getopt level.
532 dnl % touch /tmp/a.c
533 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
534 dnl gcc: unrecognized option '-Qunused-arguments'
535 dnl 0
536 dnl %
50194820 537 CFLAGS="$CFLAGS $WERROR $1"
c2deac54 538 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
064af421
BP		 539 CFLAGS="$ovs_save_CFLAGS"])
540 if test $ovs_cv_name = yes; then
83f6c050 541 m4_if([$2], [], [:], [$2])
064af421
BP		 542 else
543 m4_if([$3], [], [:], [$3])
544 fi
545])
546
50194820
BP		 547dnl OVS_CHECK_WERROR
548dnl
549dnl Check whether the C compiler accepts -Werror.
550dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
551AC_DEFUN([OVS_CHECK_WERROR],
552 [WERROR=
553 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
554
555dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
556dnl Check whether the given C compiler OPTION is accepted.
557dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
558AC_DEFUN([OVS_CHECK_CC_OPTION],
559 [AC_REQUIRE([OVS_CHECK_WERROR])
560 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
561
064af421
BP		 562dnl OVS_ENABLE_OPTION([OPTION])
563dnl Check whether the given C compiler OPTION is accepted.
d161c099 564dnl If so, add it to WARNING_FLAGS.
064af421
BP		 565dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
566AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 567 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
568 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 569
570dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
571dnl Check whether the given C compiler OPTION is accepted.
572dnl If so, enable the given Automake CONDITIONAL.
573
574dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
575AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
576 [OVS_CHECK_CC_OPTION(
577 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
578 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 579dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 580
581dnl Check for too-old XenServer.
582AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
583 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
584 [if test -e /etc/redhat-release; then
585 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
586 fi
587 if test -z "$ovs_cv_xsversion"; then
588 ovs_cv_xsversion=none
589 fi])
590 case $ovs_cv_xsversion in
591 none)
592 ;;
593
594 [[1-9]][[0-9]]* | dnl XenServer 10 or later
595 [[6-9]]* | dnl XenServer 6 or later
596 5.[[7-9]]* | dnl XenServer 5.7 or later
597 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
598 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
599 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
600 ;;
601
602 *)
603 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.)])
604 ;;
605 esac])
29d935d6
BP		 606
607dnl OVS_MAKE_HAS_IF([if-true], [if-false])
608dnl
609dnl Checks whether make has the GNU make $(if condition,then,else) extension.
610dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 611AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 612 [AC_CACHE_CHECK(
613 [whether ${MAKE-make} has GNU make \$(if) extension],
614 [ovs_cv_gnu_make_if],
615 [cat <<'EOF' > conftest.mk
616conftest.out:
380f86e4 617 echo $(if x,y,z) > conftest.out
29d935d6
BP		 618.PHONY: all
619EOF
620 rm -f conftest.out
621 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
622 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
623 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
624 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
625 result=`cat conftest.out`
626 rm -f conftest.mk conftest.out
627 if test "X$result" = "Xy"; then
628 ovs_cv_gnu_make_if=yes
629 else
630 ovs_cv_gnu_make_if=no
372d58a4 631 fi])])
29d935d6 632
b4e1bf8b
BP		 633dnl OVS_CHECK_GNU_MAKE
634dnl
635dnl Checks whether make is GNU make (because Linux kernel Makefiles
636dnl only work with GNU make).
637AC_DEFUN([OVS_CHECK_GNU_MAKE],
638 [AC_CACHE_CHECK(
639 [whether ${MAKE-make} is GNU make],
640 [ovs_cv_gnu_make],
641 [rm -f conftest.out
642 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
643 ${MAKE-make} --version >conftest.out 2>&1
644 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
645 result=`cat conftest.out`
646 rm -f conftest.mk conftest.out
647
648 case $result in # (
649 GNU*) ovs_cv_gnu_make=yes ;; # (
650 *) ovs_cv_gnu_make=no ;;
651 esac])
652 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
653
643c0c34
BP		 654dnl OVS_CHECK_SPARSE_TARGET
655dnl
656dnl The "cgcc" script from "sparse" isn't very good at detecting the
657dnl target for which the code is being built. This helps it out.
658AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
659 [AC_CACHE_CHECK(
660 [target hint for cgcc],
661 [ac_cv_sparse_target],
662 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
663 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
664 [x86_64-*], [ac_cv_sparse_target=x86_64],
665 [ac_cv_sparse_target=other])])
666 AS_CASE([$ac_cv_sparse_target],
667 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
668 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
669 [SPARSEFLAGS= CGCCFLAGS=])
670 AC_SUBST([SPARSEFLAGS])
671 AC_SUBST([CGCCFLAGS])])
672
32e96ab7
AZ		 673dnl OVS_SPARSE_EXTRA_INCLUDES
674dnl
675dnl The cgcc script from "sparse" does not search gcc's default
676dnl search path. Get the default search path from GCC and pass
677dnl them to sparse.
678AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
679 AC_SUBST([SPARSE_EXTRA_INCLUDES],
680 [`$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 ' ' `] ))
681
29d935d6
BP		 682dnl OVS_ENABLE_SPARSE
683AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 684 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 685 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 686 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 687 : ${SPARSE=sparse}
688 AC_SUBST([SPARSE])
689 AC_CONFIG_COMMANDS_PRE(
690 [if test $ovs_cv_gnu_make_if = yes; then
38b7a52b 691 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 692 fi])])
8a8cd0ac
BP		 693
694dnl OVS_PTHREAD_SET_NAME
695dnl
696dnl This checks for three known variants of pthreads functions for setting
697dnl the name of the current thread:
698dnl
699dnl glibc: int pthread_setname_np(pthread_t, const char *name);
700dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
701dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
702dnl
703dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
704dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
705dnl provide to it.
706dnl
707dnl This macro defines:
708dnl
709dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
710dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
711dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
712AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
713 [AC_CHECK_FUNCS([pthread_set_name_np])
714 if test $ac_cv_func_pthread_set_name_np != yes; then
715 AC_CACHE_CHECK(
716 [for pthread_setname_np() variant],
717 [ovs_cv_pthread_setname_np],
718 [AC_LINK_IFELSE(
a0903134 719 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 720 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 721 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 722 [AC_LINK_IFELSE(
a0903134 723 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 724], [pthread_setname_np(pthread_self(), "%s", "name");])],
725 [ovs_cv_pthread_setname_np=netbsd],
a0903134 726 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 727 case $ovs_cv_pthread_setname_np in # (
728 glibc)
a0903134
YT		 729 AC_DEFINE(
730 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
731 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
732 ;; # (
8a8cd0ac 733 netbsd)
a0903134
YT		 734 AC_DEFINE(
735 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
736 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
737 ;;
8a8cd0ac
BP		 738 esac
739 fi])
5020f5f0
BP		 740
741dnl OVS_CHECK_LINUX_HOST.
742dnl
743dnl Checks whether we're building for a Linux host, based on the presence of
744dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
745dnl LINUX based on the result.
746AC_DEFUN([OVS_CHECK_LINUX_HOST],
747 [AC_CACHE_CHECK(
748 [whether __linux__ is defined],
749 [ovs_cv_linux],
750 [AC_COMPILE_IFELSE(
751 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
752 [ovs_cv_linux=true],
753 [ovs_cv_linux=false])])
754 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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