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tnl-port: Fix list iteration.
[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
18f777b2 175 DPDK_LIB="-ldpdk"
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])
46d69d18 327 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
2ea82414
PS		 328 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
329 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
13dd4a97
JS		 330 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
331 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
920fc091 332 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_is_fragment])
4aa13c0c 333
e3438006
BP		 334 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
335 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
336 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
42d5dd95
TG		 337 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
338 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
d1890de5 339 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
e2f3178f 340 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats])
572e54fa
FL		 341 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_rx_handler_register])
342 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_extended])
343 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [rx_handler_func_t.*pskb],
344 [OVS_DEFINE([HAVE_RX_HANDLER_PSKB])])
cd7330d0
PS		 345 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
346 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
e2f3178f
PK		 347
348 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
4aa13c0c 349
e3438006
BP		 350 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
351 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 352 [rcu_read_lock_held])])
8fa52250 353 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
cf6cb3a2 354
6a33828d
BP		 355 # Check for the proto_data_valid member in struct sk_buff. The [^@]
356 # is necessary because some versions of this header remove the
357 # member but retain the kerneldoc comment that describes it (which
358 # starts with @). The brackets must be doubled because of m4
359 # quoting rules.
e3438006 360 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 361 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
d23239a2 362 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
60c4904f 363 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 364 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
365 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 366 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 367 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 368 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 369 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 370 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
371 [skb_reset_tail_pointer])
e3438006
BP		 372 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
373 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 374 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 375 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 376 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 377 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 378 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 379 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 380 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 381 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 382 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 383 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 384 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 385 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
e2f3178f
PK		 386 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash])
387 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 388 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
389 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
75e93287
FL		 390 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
391 [OVS_DEFINE([HAVE_L4_RXHASH])])
5cce04b6 392 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370
TG		 393 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
394 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
4aa13c0c 395
e3438006 396 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 397 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 398 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 399 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 400 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
401 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 402
e3438006
BP		 403 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
404 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 405
114fce23
SG		 406 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
407 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 408 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
705e9260 409 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_new_unicast])
6233a1bd
TG		 410 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
411 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 412 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 413 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
414 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
415
416 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
417 [genl_multicast_group], [id])
418
cc1d0dea 419 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
8abaa53c 420 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e3438006 421 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 422 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
423 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
424 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
e3438006 425 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 426 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
4aa13c0c 427
c4e976db
JG		 428 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
429
e3438006 430 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 431 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 432 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f
TG		 433 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
434
431488e6 435
09f27436
JG		 436 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
437
f285d3e7
TG		 438 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
439 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
3174a818
TG		 440 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
441 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
f6a0c895 442 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 443 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
444 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
445 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
446 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_set_csum])
f6a0c895
TG		 447 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df:1],
448 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
13dd4a97
JS		 449 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_GRE_CSUM],
450 [OVS_DEFINE([HAVE_SKB_GSO_GRE_CSUM])])
451 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [SKB_GSO_UDP_TUNNEL_CSUM],
452 [OVS_DEFINE([HAVE_SKB_GSO_UDP_TUNNEL_CSUM])])
f6a0c895
TG		 453 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
454 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 455
21a719d6
FL		 456 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
457 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
458
22bcc0e7
JG		 459 if cmp -s datapath/linux/kcompat.h.new \
460 datapath/linux/kcompat.h >/dev/null 2>&1; then
461 rm datapath/linux/kcompat.h.new
064af421 462 else
22bcc0e7 463 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 464 fi
465])
466
467dnl Checks for net/if_packet.h.
468AC_DEFUN([OVS_CHECK_IF_PACKET],
469 [AC_CHECK_HEADER([net/if_packet.h],
470 [HAVE_IF_PACKET=yes],
471 [HAVE_IF_PACKET=no])
472 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
473 if test "$HAVE_IF_PACKET" = yes; then
474 AC_DEFINE([HAVE_IF_PACKET], [1],
475 [Define to 1 if net/if_packet.h is available.])
476 fi])
477
f6eb6b20 478dnl Checks for net/if_dl.h.
d30e714c 479dnl
d23fa2ed
YT		 480dnl (We use this as a proxy for checking whether we're building on FreeBSD
481dnl or NetBSD.)
9360d9b7
EM		 482AC_DEFUN([OVS_CHECK_IF_DL],
483 [AC_CHECK_HEADER([net/if_dl.h],
484 [HAVE_IF_DL=yes],
485 [HAVE_IF_DL=no])
486 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
487 if test "$HAVE_IF_DL" = yes; then
488 AC_DEFINE([HAVE_IF_DL], [1],
489 [Define to 1 if net/if_dl.h is available.])
d30e714c 490
d23fa2ed 491 # On these platforms we use libpcap to access network devices.
d30e714c 492 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 493 fi])
494
e50097d2
BP		 495dnl Checks for buggy strtok_r.
496dnl
497dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
498dnl with optimization that can cause segfaults:
499dnl
500dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
501AC_DEFUN([OVS_CHECK_STRTOK_R],
502 [AC_CACHE_CHECK(
503 [whether strtok_r macro segfaults on some inputs],
504 [ovs_cv_strtok_r_bug],
505 [AC_RUN_IFELSE(
506 [AC_LANG_PROGRAM([#include <stdio.h>
507 #include <string.h>
508 ],
416e7132
BP		 509 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
510 /* Assume bug is present, because relatively minor
511 changes in compiler settings (e.g. optimization
512 level) can make it crop up. */
513 return 1;
514 #else
515 char string[] = ":::";
e50097d2
BP		 516 char *save_ptr = (char *) 0xc0ffee;
517 char *token1, *token2;
518 token1 = strtok_r(string, ":", &save_ptr);
519 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 520 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 521 printf ("%s %s\n", token1, token2);
522 return 0;
416e7132 523 #endif
e50097d2
BP		 524 ]])],
525 [ovs_cv_strtok_r_bug=no],
526 [ovs_cv_strtok_r_bug=yes],
527 [ovs_cv_strtok_r_bug=yes])])
528 if test $ovs_cv_strtok_r_bug = yes; then
529 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
530 [Define if strtok_r macro segfaults on some inputs])
531 fi
532])
533
064af421
BP		 534dnl ----------------------------------------------------------------------
535dnl These macros are from GNU PSPP, with the following original license:
536dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
537dnl This file is free software; the Free Software Foundation
538dnl gives unlimited permission to copy and/or distribute it,
539dnl with or without modifications, as long as this notice is preserved.
540
50194820 541AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
7c96151e 542 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
064af421
BP		 543 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
544 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 545 dnl Include -Werror in the compiler options, because without -Werror
546 dnl clang's GCC-compatible compiler driver does not return a failure
547 dnl exit status even though it complains about options it does not
548 dnl understand.
c2deac54
YT		 549 dnl
550 dnl Also, check stderr as gcc exits with status 0 for options
551 dnl rejected at getopt level.
552 dnl % touch /tmp/a.c
553 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
554 dnl gcc: unrecognized option '-Qunused-arguments'
555 dnl 0
556 dnl %
50194820 557 CFLAGS="$CFLAGS $WERROR $1"
c2deac54 558 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
064af421
BP		 559 CFLAGS="$ovs_save_CFLAGS"])
560 if test $ovs_cv_name = yes; then
83f6c050 561 m4_if([$2], [], [:], [$2])
064af421
BP		 562 else
563 m4_if([$3], [], [:], [$3])
564 fi
565])
566
50194820
BP		 567dnl OVS_CHECK_WERROR
568dnl
569dnl Check whether the C compiler accepts -Werror.
570dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
571AC_DEFUN([OVS_CHECK_WERROR],
572 [WERROR=
573 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
574
575dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
576dnl Check whether the given C compiler OPTION is accepted.
577dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
578AC_DEFUN([OVS_CHECK_CC_OPTION],
579 [AC_REQUIRE([OVS_CHECK_WERROR])
580 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
581
064af421
BP		 582dnl OVS_ENABLE_OPTION([OPTION])
583dnl Check whether the given C compiler OPTION is accepted.
d161c099 584dnl If so, add it to WARNING_FLAGS.
064af421
BP		 585dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
586AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 587 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
588 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 589
590dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
591dnl Check whether the given C compiler OPTION is accepted.
592dnl If so, enable the given Automake CONDITIONAL.
593
594dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
595AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
596 [OVS_CHECK_CC_OPTION(
597 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
598 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 599dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 600
601dnl Check for too-old XenServer.
602AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
603 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
604 [if test -e /etc/redhat-release; then
605 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
606 fi
607 if test -z "$ovs_cv_xsversion"; then
608 ovs_cv_xsversion=none
609 fi])
610 case $ovs_cv_xsversion in
611 none)
612 ;;
613
614 [[1-9]][[0-9]]* | dnl XenServer 10 or later
615 [[6-9]]* | dnl XenServer 6 or later
616 5.[[7-9]]* | dnl XenServer 5.7 or later
617 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
618 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
619 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
620 ;;
621
622 *)
623 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.)])
624 ;;
625 esac])
29d935d6
BP		 626
627dnl OVS_MAKE_HAS_IF([if-true], [if-false])
628dnl
629dnl Checks whether make has the GNU make $(if condition,then,else) extension.
630dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 631AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 632 [AC_CACHE_CHECK(
633 [whether ${MAKE-make} has GNU make \$(if) extension],
634 [ovs_cv_gnu_make_if],
635 [cat <<'EOF' > conftest.mk
636conftest.out:
380f86e4 637 echo $(if x,y,z) > conftest.out
29d935d6
BP		 638.PHONY: all
639EOF
640 rm -f conftest.out
641 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
642 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
643 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
644 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
645 result=`cat conftest.out`
646 rm -f conftest.mk conftest.out
647 if test "X$result" = "Xy"; then
648 ovs_cv_gnu_make_if=yes
649 else
650 ovs_cv_gnu_make_if=no
372d58a4 651 fi])])
29d935d6 652
b4e1bf8b
BP		 653dnl OVS_CHECK_GNU_MAKE
654dnl
655dnl Checks whether make is GNU make (because Linux kernel Makefiles
656dnl only work with GNU make).
657AC_DEFUN([OVS_CHECK_GNU_MAKE],
658 [AC_CACHE_CHECK(
659 [whether ${MAKE-make} is GNU make],
660 [ovs_cv_gnu_make],
661 [rm -f conftest.out
662 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
663 ${MAKE-make} --version >conftest.out 2>&1
664 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
665 result=`cat conftest.out`
666 rm -f conftest.mk conftest.out
667
668 case $result in # (
669 GNU*) ovs_cv_gnu_make=yes ;; # (
670 *) ovs_cv_gnu_make=no ;;
671 esac])
672 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
673
643c0c34
BP		 674dnl OVS_CHECK_SPARSE_TARGET
675dnl
676dnl The "cgcc" script from "sparse" isn't very good at detecting the
677dnl target for which the code is being built. This helps it out.
678AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
679 [AC_CACHE_CHECK(
680 [target hint for cgcc],
681 [ac_cv_sparse_target],
682 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
683 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
684 [x86_64-*], [ac_cv_sparse_target=x86_64],
685 [ac_cv_sparse_target=other])])
686 AS_CASE([$ac_cv_sparse_target],
687 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
688 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
689 [SPARSEFLAGS= CGCCFLAGS=])
690 AC_SUBST([SPARSEFLAGS])
691 AC_SUBST([CGCCFLAGS])])
692
32e96ab7
AZ		 693dnl OVS_SPARSE_EXTRA_INCLUDES
694dnl
695dnl The cgcc script from "sparse" does not search gcc's default
696dnl search path. Get the default search path from GCC and pass
697dnl them to sparse.
698AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
699 AC_SUBST([SPARSE_EXTRA_INCLUDES],
700 [`$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 ' ' `] ))
701
29d935d6
BP		 702dnl OVS_ENABLE_SPARSE
703AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 704 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 705 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 706 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 707 : ${SPARSE=sparse}
708 AC_SUBST([SPARSE])
709 AC_CONFIG_COMMANDS_PRE(
710 [if test $ovs_cv_gnu_make_if = yes; then
38b7a52b 711 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 712 fi])])
8a8cd0ac
BP		 713
714dnl OVS_PTHREAD_SET_NAME
715dnl
716dnl This checks for three known variants of pthreads functions for setting
717dnl the name of the current thread:
718dnl
719dnl glibc: int pthread_setname_np(pthread_t, const char *name);
720dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
721dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
722dnl
723dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
724dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
725dnl provide to it.
726dnl
727dnl This macro defines:
728dnl
729dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
730dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
731dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
732AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
733 [AC_CHECK_FUNCS([pthread_set_name_np])
734 if test $ac_cv_func_pthread_set_name_np != yes; then
735 AC_CACHE_CHECK(
736 [for pthread_setname_np() variant],
737 [ovs_cv_pthread_setname_np],
738 [AC_LINK_IFELSE(
a0903134 739 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 740 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 741 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 742 [AC_LINK_IFELSE(
a0903134 743 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 744], [pthread_setname_np(pthread_self(), "%s", "name");])],
745 [ovs_cv_pthread_setname_np=netbsd],
a0903134 746 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 747 case $ovs_cv_pthread_setname_np in # (
748 glibc)
a0903134
YT		 749 AC_DEFINE(
750 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
751 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
752 ;; # (
8a8cd0ac 753 netbsd)
a0903134
YT		 754 AC_DEFINE(
755 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
756 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
757 ;;
8a8cd0ac
BP		 758 esac
759 fi])
5020f5f0
BP		 760
761dnl OVS_CHECK_LINUX_HOST.
762dnl
763dnl Checks whether we're building for a Linux host, based on the presence of
764dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
765dnl LINUX based on the result.
766AC_DEFUN([OVS_CHECK_LINUX_HOST],
767 [AC_CACHE_CHECK(
768 [whether __linux__ is defined],
769 [ovs_cv_linux],
770 [AC_COMPILE_IFELSE(
771 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
772 [ovs_cv_linux=true],
773 [ovs_cv_linux=false])])
774 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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