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MAINTAINERS: Add Ilya Maximets.
[mirror_ovs.git] / acinclude.m4
CommitLineData
064af421
BP		 1# -*- autoconf -*-
2
0cdd5b13 3# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2019 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"
308bf988
BP		 26 fi])
27
28 # Unless --enable-Werror is specified, report but do not fail the build
29 # for errors reported by flake8.
30 if test "X$enable_Werror" = Xyes; then
31 FLAKE8_WERROR=
32 else
33 FLAKE8_WERROR=-
34 fi
df265086
BP		 35 AC_SUBST([FLAKE8_WERROR])
36
37 # If --enable-Werror is specified, fail the build on sparse warnings.
38 if test "X$enable_Werror" = Xyes; then
39 SPARSE_WERROR=-Wsparse-error
40 else
41 SPARSE_WERROR=
42 fi
43 AC_SUBST([SPARSE_WERROR])])
a64e37a1 44
e3438006 45dnl OVS_CHECK_LINUX
064af421 46dnl
997d327d 47dnl Configure linux kernel source tree
e3438006 48AC_DEFUN([OVS_CHECK_LINUX], [
8a2d6596
BP		 49 AC_ARG_WITH([linux],
50 [AC_HELP_STRING([--with-linux=/path/to/linux],
51 [Specify the Linux kernel build directory])])
52 AC_ARG_WITH([linux-source],
53 [AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
54 [Specify the Linux kernel source directory
a0903134
YT		 55 (usually figured out automatically from build
56 directory)])])
8a2d6596
BP		 57
58 # Deprecated equivalents to --with-linux, --with-linux-source.
59 AC_ARG_WITH([l26])
60 AC_ARG_WITH([l26-source])
61
62 if test X"$with_linux" != X; then
63 KBUILD=$with_linux
64 elif test X"$with_l26" != X; then
65 KBUILD=$with_l26
66 AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
67 else
68 KBUILD=
69 fi
70
71 if test X"$KBUILD" != X; then
72 if test X"$with_linux_source" != X; then
73 KSRC=$with_linux_source
74 elif test X"$with_l26_source" != X; then
75 KSRC=$with_l26_source
76 AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
0a89c170
BP		 77 else
78 KSRC=
8a2d6596
BP		 79 fi
80 elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
81 AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
82 fi
83
e3438006
BP		 84 if test -n "$KBUILD"; then
85 KBUILD=`eval echo "$KBUILD"`
86 case $KBUILD in
0b6d72fc 87 /*) ;;
e3438006 88 *) KBUILD=`pwd`/$KBUILD ;;
0b6d72fc 89 esac
064af421 90
7c9e113b
BP		 91 # The build directory is what the user provided.
92 # Make sure that it exists.
8a2d6596 93 AC_MSG_CHECKING([for Linux build directory])
e3438006 94 if test -d "$KBUILD"; then
a0903134
YT		 95 AC_MSG_RESULT([$KBUILD])
96 AC_SUBST(KBUILD)
064af421 97 else
a0903134
YT		 98 AC_MSG_RESULT([no])
99 AC_ERROR([source dir $KBUILD doesn't exist])
064af421
BP		 100 fi
101
7c9e113b 102 # Debian breaks kernel headers into "source" header and "build" headers.
e3438006 103 # We want the source headers, but $KBUILD gives us the "build" headers.
7c9e113b 104 # Use heuristics to find the source headers.
8a2d6596 105 AC_MSG_CHECKING([for Linux source directory])
e3438006
BP		 106 if test -n "$KSRC"; then
107 KSRC=`eval echo "$KSRC"`
108 case $KSRC in
f5fb5de6 109 /*) ;;
e3438006 110 *) KSRC=`pwd`/$KSRC ;;
b57f675c 111 esac
e3438006 112 if test ! -e $KSRC/include/linux/kernel.h; then
53319f95 113 AC_MSG_ERROR([$KSRC is not a kernel source directory])
f5fb5de6
BP		 114 fi
115 else
e3438006
BP		 116 KSRC=$KBUILD
117 if test ! -e $KSRC/include/linux/kernel.h; then
fe0731b1
BP		 118 # Debian kernel build Makefiles tend to include a line of the form:
119 # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
120 # First try to extract the source directory from this line.
121 KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
122 if test ! -e "$KSRC"/include/linux/kernel.h; then
123 # Didn't work. Fall back to name-based heuristics that used to work.
124 case `echo "$KBUILD" | sed 's,/*$,,'` in # (
125 */build)
126 KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
127 ;; # (
128 *)
129 KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
130 ;;
131 esac
132 fi
f5fb5de6 133 fi
fe0731b1 134 if test ! -e "$KSRC"/include/linux/kernel.h; then
8a2d6596 135 AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
7c9e113b
BP		 136 fi
137 fi
e3438006 138 AC_MSG_RESULT([$KSRC])
7c9e113b
BP		 139
140 AC_MSG_CHECKING([for kernel version])
71fe9970 141 version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
e3438006
BP		 142 patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
143 sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
71fe9970 144 if test X"$version" = X || test X"$patchlevel" = X; then
7c9e113b 145 AC_ERROR([cannot determine kernel version])
71fe9970
BP		 146 elif test X"$sublevel" = X; then
147 kversion=$version.$patchlevel
148 else
149 kversion=$version.$patchlevel.$sublevel
7c9e113b 150 fi
71fe9970
BP		 151 AC_MSG_RESULT([$kversion])
152
3afcde43 153 if test "$version" -ge 4; then
7c84d7f4 154 if test "$version" = 4 && test "$patchlevel" -le 18; then
3afcde43 155 : # Linux 4.x
d76aabea 156 else
7c84d7f4 157 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.18.x is not supported (please refer to the FAQ for advice)])
d76aabea 158 fi
8063e095 159 elif test "$version" = 3 && test "$patchlevel" -ge 10; then
3afcde43 160 : # Linux 3.x
71fe9970 161 else
8063e095 162 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
064af421 163 fi
2520f452
IY		 164 if (test ! -e "$KBUILD"/include/linux/version.h && \
165 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
e3438006
BP		 166 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
167 test ! -e "$KBUILD"/include/generated/autoconf.h); then
a0903134 168 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
064af421 169 fi
e3438006 170 OVS_CHECK_LINUX_COMPAT
064af421 171 fi
e3438006 172 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
064af421
BP		 173])
174
1dc0da67
PB		 175dnl OVS_CHECK_LINUX_TC
176dnl
177dnl Configure Linux tc compat.
178AC_DEFUN([OVS_CHECK_LINUX_TC], [
179 AC_COMPILE_IFELSE([
180 AC_LANG_PROGRAM([#include <linux/pkt_cls.h>], [
dd83253e 181 int x = TCA_FLOWER_KEY_ENC_IP_TTL_MASK;
1dc0da67 182 ])],
dd83253e
OG		 183 [AC_DEFINE([HAVE_TCA_FLOWER_KEY_ENC_IP_TTL_MASK], [1],
184 [Define to 1 if TCA_FLOWER_KEY_ENC_IP_TTL_MASK is available.])])
1dc0da67
PB		 185
186 AC_COMPILE_IFELSE([
187 AC_LANG_PROGRAM([#include <linux/tc_act/tc_vlan.h>], [
188 int x = TCA_VLAN_PUSH_VLAN_PRIORITY;
189 ])],
190 [AC_DEFINE([HAVE_TCA_VLAN_PUSH_VLAN_PRIORITY], [1],
dd83253e 191 [Define to 1 if TCA_VLAN_PUSH_VLAN_PRIORITY is available.])])
1dc0da67
PB		 192
193 AC_COMPILE_IFELSE([
194 AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
4b12e454 195 int x = TCA_TUNNEL_KEY_ENC_TTL;
1dc0da67 196 ])],
4b12e454
OG		 197 [AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_TTL], [1],
198 [Define to 1 if TCA_TUNNEL_KEY_ENC_TTL is available.])])
e5b1657e
PB		 199
200 AC_COMPILE_IFELSE([
201 AC_LANG_PROGRAM([#include <linux/tc_act/tc_pedit.h>], [
202 int x = TCA_PEDIT_KEY_EX_HDR_TYPE_UDP;
203 ])],
204 [AC_DEFINE([HAVE_TCA_PEDIT_KEY_EX_HDR_TYPE_UDP], [1],
dd83253e 205 [Define to 1 if TCA_PEDIT_KEY_EX_HDR_TYPE_UDP is available.])])
7808b2b9
JH		 206
207 AC_COMPILE_IFELSE([
208 AC_LANG_PROGRAM([#include <linux/tc_act/tc_skbedit.h>], [
209 int x = TCA_SKBEDIT_FLAGS;
210 ])],
211 [AC_DEFINE([HAVE_TCA_SKBEDIT_FLAGS], [1],
212 [Define to 1 if TCA_SKBEDIT_FLAGS is available.])])
1dc0da67
PB		 213])
214
f0d1ead8
IM		 215dnl OVS_FIND_DEPENDENCY(FUNCTION, SEARCH_LIBS, NAME_TO_PRINT)
216dnl
217dnl Check for a function in a library list.
218AC_DEFUN([OVS_FIND_DEPENDENCY], [
219 AC_SEARCH_LIBS([$1], [$2], [], [
220 AC_MSG_ERROR([unable to find $3, install the dependency package])
221 ])
222])
223
8a9562d2
PS		 224dnl OVS_CHECK_DPDK
225dnl
226dnl Configure DPDK source tree
227AC_DEFUN([OVS_CHECK_DPDK], [
228 AC_ARG_WITH([dpdk],
229 [AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
4c16ee48
MV		 230 [Specify the DPDK build directory])],
231 [have_dpdk=true])
8a9562d2 232
40b5ea86 233 AC_MSG_CHECKING([whether dpdk datapath is enabled])
4c16ee48 234 if test "$have_dpdk" != true || test "$with_dpdk" = no; then
40b5ea86
BB		 235 AC_MSG_RESULT([no])
236 DPDKLIB_FOUND=false
237 else
238 AC_MSG_RESULT([yes])
239 case "$with_dpdk" in
240 yes)
241 DPDK_AUTO_DISCOVER="true"
5b5aa2d8
CE		 242 PKG_CHECK_MODULES_STATIC([DPDK], [libdpdk], [
243 DPDK_INCLUDE="$DPDK_CFLAGS"
244 DPDK_LIB="$DPDK_LIBS"], [
245 DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"
246 DPDK_LIB="-ldpdk"])
40b5ea86
BB		 247 ;;
248 *)
249 DPDK_AUTO_DISCOVER="false"
96195c09 250 DPDK_INCLUDE_PATH="$with_dpdk/include"
40b5ea86
BB		 251 # If 'with_dpdk' is passed install directory, point to headers
252 # installed in $DESTDIR/$prefix/include/dpdk
96195c09
CE		 253 if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
254 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
255 elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
256 DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
214ac6d4 257 fi
40b5ea86 258 DPDK_LIB_DIR="$with_dpdk/lib"
5b5aa2d8 259 DPDK_LIB="-ldpdk"
40b5ea86
BB		 260 ;;
261 esac
8a9562d2 262
95626395
TG		 263 ovs_save_CFLAGS="$CFLAGS"
264 ovs_save_LDFLAGS="$LDFLAGS"
96195c09 265 CFLAGS="$CFLAGS $DPDK_INCLUDE"
40b5ea86
BB		 266 if test "$DPDK_AUTO_DISCOVER" = "false"; then
267 LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
268 fi
269
865cee2b
IM		 270 AC_CHECK_HEADERS([rte_config.h], [], [
271 AC_MSG_ERROR([unable to find rte_config.h in $with_dpdk])
272 ], [AC_INCLUDES_DEFAULT])
273
f0d1ead8
IM		 274 AC_CHECK_DECLS([RTE_LIBRTE_VHOST_NUMA, RTE_EAL_NUMA_AWARE_HUGEPAGES], [
275 OVS_FIND_DEPENDENCY([get_mempolicy], [numa], [libnuma])
276 ], [], [[#include <rte_config.h>]])
4b88d678 277
f0d1ead8
IM		 278 AC_CHECK_DECL([RTE_LIBRTE_VHOST_NUMA], [
279 AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])
280 ], [], [[#include <rte_config.h>]])
fc3b425f 281
f0d1ead8
IM		 282 AC_CHECK_DECL([RTE_LIBRTE_PMD_PCAP], [
283 OVS_FIND_DEPENDENCY([pcap_dump], [pcap], [libpcap])
284 AC_CHECK_DECL([RTE_LIBRTE_PDUMP], [
285 AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])
286 ], [], [[#include <rte_config.h>]])
287 ], [], [[#include <rte_config.h>]])
939bad9a 288
f0d1ead8
IM		 289 AC_CHECK_DECL([RTE_LIBRTE_MLX5_PMD], [dnl found
290 OVS_FIND_DEPENDENCY([mnl_attr_put], [mnl], [libmnl])
291 AC_CHECK_DECL([RTE_LIBRTE_MLX5_DLOPEN_DEPS], [], [dnl not found
292 OVS_FIND_DEPENDENCY([mlx5dv_create_wq], [mlx5], [libmlx5])
293 OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
294 ], [[#include <rte_config.h>]])
295 ], [], [[#include <rte_config.h>]])
84844e3f 296
f0d1ead8
IM		 297 AC_CHECK_DECL([RTE_LIBRTE_MLX4_PMD], [dnl found
298 AC_CHECK_DECL([RTE_LIBRTE_MLX4_DLOPEN_DEPS], [], [dnl not found
299 OVS_FIND_DEPENDENCY([mlx4dv_init_obj], [mlx4], [libmlx4])
300 OVS_FIND_DEPENDENCY([verbs_init_cq], [ibverbs], [libibverbs])
301 ], [[#include <rte_config.h>]])
302 ], [], [[#include <rte_config.h>]])
939bad9a 303
e2f37511
IM		 304 # DPDK uses dlopen to load plugins.
305 OVS_FIND_DEPENDENCY([dlopen], [dl], [libdl])
306
307 AC_MSG_CHECKING([whether linking with dpdk works])
308 LIBS="$DPDK_LIB $LIBS"
309 AC_LINK_IFELSE(
310 [AC_LANG_PROGRAM([#include <rte_config.h>
311 #include <rte_eal.h>],
312 [int rte_argc; char ** rte_argv;
313 rte_eal_init(rte_argc, rte_argv);])],
314 [AC_MSG_RESULT([yes])
315 DPDKLIB_FOUND=true],
316 [AC_MSG_RESULT([no])
317 if test "$DPDK_AUTO_DISCOVER" = "true"; then
318 AC_MSG_ERROR(m4_normalize([
319 Could not find DPDK library in default search path, Use --with-dpdk
320 to specify the DPDK library installed in non-standard location]))
321 else
322 AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
323 fi
324 ])
c1223b11 325
95626395
TG		 326 CFLAGS="$ovs_save_CFLAGS"
327 LDFLAGS="$ovs_save_LDFLAGS"
40b5ea86
BB		 328 if test "$DPDK_AUTO_DISCOVER" = "false"; then
329 OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
330 fi
96195c09 331 OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
ab2a3154 332 OVS_ENABLE_OPTION([-mssse3])
8a9562d2 333
3c94676c 334 # DPDK pmd drivers are not linked unless --whole-archive is used.
d7310583
DDP		 335 #
336 # This happens because the rest of the DPDK code doesn't use any symbol in
337 # the pmd driver objects, and the drivers register themselves using an
338 # __attribute__((constructor)) function.
339 #
340 # These options are specified inside a single -Wl directive to prevent
341 # autotools from reordering them.
5b5aa2d8
CE		 342 #
343 # OTOH newer versions of dpdk pkg-config (generated with Meson)
344 # will already have flagged just the right set of libs with
345 # --whole-archive - in those cases do not wrap it once more.
346 case "$DPDK_LIB" in
347 *whole-archive*) DPDK_vswitchd_LDFLAGS=$DPDK_LIB;;
348 *) DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
349 esac
9475dfeb 350 AC_SUBST([DPDK_vswitchd_LDFLAGS])
8a9562d2 351 AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
8a9562d2
PS		 352 fi
353
40b5ea86 354 AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
8a9562d2
PS		 355])
356
8828e5c7 357dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 358dnl
359dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 360dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
361dnl <REGEX> translated to uppercase.
064af421
BP		 362AC_DEFUN([OVS_GREP_IFELSE], [
363 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 364 if test -f $1; then
365 grep '$2' $1 >/dev/null 2>&1
366 status=$?
367 case $status in
997d327d 368 0)
7507ec48 369 AC_MSG_RESULT([yes])
8828e5c7 370 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48 371 ;;
997d327d 372 1)
7507ec48
JG		 373 AC_MSG_RESULT([no])
374 $4
375 ;;
997d327d 376 *)
7507ec48
JG		 377 AC_MSG_ERROR([grep exited with status $status])
378 ;;
379 esac
380 else
381 AC_MSG_RESULT([file not found])
382 $4
383 fi
064af421
BP		 384])
385
13dd4a97
JS		 386dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
387dnl
388dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
389dnl structure definition. If this is successful, runs IF-MATCH, otherwise
390dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
391dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
392dnl translated to uppercase.
393AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
394 AC_MSG_CHECKING([whether $2 has member $3 in $1])
395 if test -f $1; then
83a27884 396 awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
13dd4a97
JS		 397 status=$?
398 case $status in
399 0)
400 AC_MSG_RESULT([yes])
401 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
402 ;;
403 1)
404 AC_MSG_RESULT([no])
405 $5
406 ;;
407 *)
408 AC_MSG_ERROR([grep exited with status $status])
409 ;;
410 esac
411 else
412 AC_MSG_RESULT([file not found])
413 $5
414 fi
415])
416
71ce9edd
JR		 417dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
418dnl
419dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
420dnl the function signature starting from the line matching FUNCTION
421dnl and ending with the line containing the closing parenthesis. If
422dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
423dnl IF-MATCH is empty then it defines to
424dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
425dnl <REGEX> translated to uppercase.
426AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
427 AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
428 if test -f $1; then
429 awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
430 status=$?
431 case $status in
432 0)
433 AC_MSG_RESULT([yes])
434 m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
435 ;;
436 1)
437 AC_MSG_RESULT([no])
438 $5
439 ;;
440 *)
441 AC_MSG_ERROR([grep exited with status $status])
442 ;;
443 esac
444 else
445 AC_MSG_RESULT([file not found])
446 $5
447 fi
448])
449
064af421
BP		 450dnl OVS_DEFINE(NAME)
451dnl
452dnl Defines NAME to 1 in kcompat.h.
453AC_DEFUN([OVS_DEFINE], [
22bcc0e7 454 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 455])
456
e3438006 457dnl OVS_CHECK_LINUX_COMPAT
064af421 458dnl
8063e095 459dnl Runs various Autoconf checks on the Linux kernel source in
e3438006
BP		 460dnl the directory in $KBUILD.
461AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 462 rm -f datapath/linux/kcompat.h.new
463 mkdir -p datapath/linux
464 : > datapath/linux/kcompat.h.new
4aa13c0c 465
e23775f2
PS		 466 echo '#include <linux/version.h>
467#ifndef RHEL_RELEASE_CODE
468#define RHEL_RELEASE_CODE 0
469#define RHEL_RELEASE_VERSION(a, b) 0
470#endif' >> datapath/linux/kcompat.h.new
471
e3438006 472 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 473 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
474
db1dcb23
DB		 475 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6_get_cookie],
476 [OVS_DEFINE([HAVE_RT6_GET_COOKIE])])
477
e23775f2
PS		 478 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
479 [OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
480 OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
481
e3438006 482 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4303ec34 483 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
54125dd0 484 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
4aa13c0c 485
8aef057b 486 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [static_branch_unlikely(],
6660a959 487 [OVS_DEFINE([HAVE_UPSTREAM_STATIC_KEY])])
8aef057b
YHW		 488 OVS_GREP_IFELSE([$KSRC/include/linux/jump_label.h], [DEFINE_STATIC_KEY_FALSE],
489 [OVS_DEFINE([HAVE_DEFINE_STATIC_KEY])])
6660a959 490
d923a695 491 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
e2f3178f 492 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
d923a695 493
e23775f2
PS		 494 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
495 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
496 OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
d923a695 497 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
ec96e663 498 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
d923a695 499
e3438006 500 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
46d69d18 501 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
2ea82414
PS		 502 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
503 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
e23775f2
PS		 504 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
505 [OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
506
13dd4a97
JS		 507 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
508 [OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
39c0ff22
JS		 509 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
510 [OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
0374bcbe
EB		 511 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
512 [ip_do_fragment], [net],
513 [OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
0643a78b
PS		 514 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
515 [ip_local_out], [net],
516 [OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
517
cfda4537 518 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
0f09d6e3
JS		 519
520 OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
521 [OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
06f1a61a 522 OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
595e069a
JS		 523 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
524 [OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
8f00ece9
JS		 525 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
526 [OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
e0d45da3 527 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
ccd0a13b 528 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
91408ae0
JS		 529 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
530 [frags_work])
d1c390e6
JS		 531 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
532 [rwlock])
e0d45da3
JS		 533 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
534 [list_evictor])
38f45380 535 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
6ccf21ca
YHW		 536 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
537 [sub_frag_mem_limit], [struct.netns_frags],
538 [OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
539 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
540 [OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
401da7b9
JS		 541 OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
542 [OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
8f00ece9 543
f2252c61
PS		 544 dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
545 dnl OVS does not really need ipv6 label field, but its presence signifies that
546 dnl the stack has all required ipv6 support.
547 dnl OVS also does not need dst_cache But this dependency allows us to write
548 dnl much cleaner code.
549
3259c4ff
PS		 550 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
551 [label],
552 [OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
553 [iptunnel_pull_offloads],
997d327d 554 [OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
e1ededf4
GR		 555 [OVS_GREP_IFELSE([$KSRC/include/net/erspan.h], [erspan_md2],
556 [OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])])
4aa13c0c 557
138df3e5
GR		 558 OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
559 [OVS_DEFINE([USE_BUILTIN_DST_CACHE])])
65590144
YHW		 560 OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
561 [OVS_DEFINE([MPLS_HEADER_IS_L3])])
fdce83a3
PS		 562 OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
563 [OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
aad7cb91 564 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
e3438006
BP		 565 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
566 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
567 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
3f506f07 568 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
42d5dd95 569 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
96b82f6d 570 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_gso_error_unwind])
42d5dd95 571 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
e23775f2 572 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
0a0d9095
PS		 573 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
574 [OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
f2252c61
PS		 575 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
576 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
e2e11c89 577 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_udp_tunnel_add])
d1890de5 578 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
8063e095
PS		 579 dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
580 dnl So check type of tstats.
581 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
582 [OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
e23775f2
PS		 583 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
584 [OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
a0c9fedc 585 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
e23775f2
PS		 586 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
587 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
588 [OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
589 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
8ce37339 590 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
6ccf21ca
YHW		 591 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
592 [extended])
7efb1e09
PS		 593 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
594 [netdev_master_upper_dev_link], [upper_priv],
595 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
b7ab7316
YHW		 596 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
597 [netdev_master_upper_dev_link_rh],
598 [OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
599
6c0bf091
JW		 600 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
601 [max_mtu])
39ca3383
YHW		 602 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops_extended],
603 [ndo_change_mtu], [OVS_DEFINE([HAVE_RHEL7_MAX_MTU])])
e23775f2
PS		 604
605 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
606 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
cd7330d0
PS		 607 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
608 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
0643a78b
PS		 609 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
610 [OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
611 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
612 [owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
179fccce
YHW		 613 OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [NFPROTO_INET])
614
0643a78b 615
e4e04c3b 616 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
2b64e8fc 617 [fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
e2f3178f 618
6d9b6937
JR		 619 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
620 [nf_conn], [struct timer_list[[ \t]]*timeout],
621 [OVS_DEFINE([HAVE_NF_CONN_TIMER])])
622 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
623 [nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
624
71ce9edd
JR		 625 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
626 [nf_ct_tmpl_alloc], [nf_conntrack_zone],
057772cf 627 [OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
71ce9edd
JR		 628 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
629 [nf_ct_get_tuplepr], [struct.net],
fa67f8e0 630 [OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
dfa791b2
FW		 631 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
632 [nf_ct_set])
56ec5593
JS		 633 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
634 [nf_ct_is_untracked])
ac9cd0d2
JS		 635 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
636 [nf_ct_zone_init])
eca4cde0
YS		 637 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_l3proto.h],
638 [net_ns_get])
459064e7
JS		 639 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
640 [nf_connlabels_get])
7f2ab8cd
JR		 641 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
642 [nf_connlabels_get], [int bit],
643 [OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
9f04eabe
JR		 644 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
645 [nf_conn_labels], [words])
0d330e42
JR		 646 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
647 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
fdec3c17 648 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_range2])
0d330e42 649 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
74496432
YHW		 650 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_count.h], [nf_conncount_gc_list],
651 [OVS_DEFINE([HAVE_UPSTREAM_NF_CONNCOUNT])])
057772cf 652
e2f3178f 653 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
f000c879 654 OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
4aa13c0c 655
e23775f2
PS		 656 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
657 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
658 OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
659 [OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
660 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
661
e3438006
BP		 662 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
663 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2 664 [rcu_read_lock_held])])
8fa52250 665 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
3d10a0c8 666 OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [net_rwsem])
997d327d 667
6a33828d
BP		 668 # Check for the proto_data_valid member in struct sk_buff. The [^@]
669 # is necessary because some versions of this header remove the
670 # member but retain the kerneldoc comment that describes it (which
671 # starts with @). The brackets must be doubled because of m4
672 # quoting rules.
e3438006 673 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 674 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
ccb75a28 675 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
e23775f2 676 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
f2252c61 677 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
c1eb2500 678 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
d23239a2 679 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
60c4904f 680 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
5640cbd8
JG		 681 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
682 [OVS_DEFINE([HAVE_U16_RXHASH])])
e3438006 683 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 684 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
997d327d 685 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 686 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 687 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
688 [skb_reset_tail_pointer])
e3438006 689 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
e3438006 690 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 691 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 692 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 693 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
da4bbeb7 694 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
0aa6fda7 695 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
d923a695 696 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 697 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
1edc458d 698 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
c253c2e3
MC		 699 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
700 [OVS_DEFINE([HAVE_SKB_GET_HASH])])
e2f3178f 701 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
705e9260
PS		 702 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
703 [OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
75e93287
FL		 704 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
705 [OVS_DEFINE([HAVE_L4_RXHASH])])
5cce04b6 706 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
97894370 707 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
a27c454e 708 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
97894370 709 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
c6e13fcc 710 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
ea3acd7a 711 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
73daf51a 712 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
d3c313c1 713 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
0ace0a26 714 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
4aa13c0c 715
e3438006 716 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 717 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 718 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 719 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 720 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
721 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 722
e3438006
BP		 723 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
724 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 725
0d03e51c 726 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
1dba1690 727 OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
0d03e51c 728
114fce23
SG		 729 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
730 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
14002a59 731 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
6233a1bd
TG		 732 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
733 [OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
c623ba49 734 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
13dd4a97
JS		 735 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
736 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
0643a78b
PS		 737 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
738 [genl_notify], [net],
739 [OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
740
13dd4a97
JS		 741
742 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
743 [genl_multicast_group], [id])
fdce83a3 744 OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
13dd4a97 745
cc1d0dea 746 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
e23775f2 747 OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
8abaa53c 748 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
e23775f2 749 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
2d3ef70b 750 OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
a94ebc39
JS		 751 OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
752 [OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
213e1f54
JS		 753 OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
754 [OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
755
91b37647 756 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
e3438006 757 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 758 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
759 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
760 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
dd693f9b 761 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
e3438006 762 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
0fcc086d 763 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
6dbd98e6
SH		 764 OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
765 [OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
15702dc9
JB		 766 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
767 [nla_parse], [netlink_ext_ack],
768 [OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
4aa13c0c 769
c4e976db
JG		 770 OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
771
e3438006 772 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6 773 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
1f649f1c 774 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
17e3889f 775 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
e23775f2 776 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
5c3f23fe 777 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
ca6da1b1 778 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
431488e6 779
aadd6ae9
JS		 780 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
781 [metadata_dst_alloc], [metadata_type])
782
09f27436
JG		 783 OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
784
3174a818
TG		 785 OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
786 [OVS_DEFINE([HAVE_VXLAN_METADATA])])
f6a0c895 787 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
13dd4a97
JS		 788 [OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
789 [OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
790 OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
e23775f2 791 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
06aeda48
PS		 792 OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
793 [OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
d7e58913
PS		 794 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
795 [gro_receive])
e23775f2
PS		 796
797 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
f6a0c895
TG		 798 [OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
799 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
800 [OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
f285d3e7 801
b7ebebcd
PS		 802 OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
803 OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
21a719d6
FL		 804 OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
805 [OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
c970aa4e
PS		 806 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
807 [udp_add_offload], [net],
808 [OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
802d12b6
GR		 809 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
810 [nf_defrag_ipv6_enable], [net],
811 [OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
bef862bc
GR		 812 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
813 [OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
7f15e8dd
GR		 814 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
815 [needs_free_netdev],
816 [OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
14365643
GR		 817 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
818 [OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
ac8e3c6d 819 OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
35fc0638
GR		 820 [nf_conntrack_helper_put],
821 [OVS_DEFINE(HAVE_NF_CONNTRACK_HELPER_PUT)])
f90e29c9 822 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],[[[[:space:]]]SKB_GSO_UDP[[[:space:]]]],
ad283644 823 [OVS_DEFINE([HAVE_SKB_GSO_UDP])])
db1dcb23
DB		 824 OVS_GREP_IFELSE([$KSRC/include/net/dst.h],[DST_NOCACHE],
825 [OVS_DEFINE([HAVE_DST_NOCACHE])])
6b51641a
GR		 826 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_link_ops],
827 [extack],
828 [OVS_DEFINE([HAVE_EXT_ACK_IN_RTNL_LINKOPS])])
a5220693
GR		 829 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
830 [list],
831 [OVS_DEFINE([HAVE_LIST_IN_NF_HOOK_OPS])])
c0802634
EG		 832 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netfilter/nf_conntrack_common.h],
833 [IP_CT_UNTRACKED])
36d3520b
GR		 834 OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
835 [netdev_master_upper_dev_link], [extack],
836 [OVS_DEFINE([HAVE_UPPER_DEV_LINK_EXTACK])])
a61fbfa4
GR		 837 OVS_GREP_IFELSE([$KSRC/include/linux/compiler_types.h],
838 [__LINUX_COMPILER_TYPES_H],
839 [OVS_DEFINE([HAVE_LINUX_COMPILER_TYPES_H])])
6deeb55a
AB		 840 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
841 [ktime_get_ts64],
842 [OVS_DEFINE([HAVE_KTIME_GET_TS64])])
b147f2e9
JB		 843 OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h],
844 [EXPORT_SYMBOL_GPL(peernet2id_alloc)],
845 [OVS_DEFINE([HAVE_PEERNET2ID_ALLOC])])
1cb57039
AZ		 846 OVS_GREP_IFELSE([$KSRC/include/linux/timekeeping.h],
847 [ktime_get_ns],
848 [OVS_DEFINE([HAVE_KTIME_GET_NS])])
b3e647ca
GR		 849 OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h],
850 frag_percpu_counter_batch[],
851 [OVS_DEFINE([HAVE_FRAG_PERCPU_COUNTER_BATCH])])
8e53509c
WT		 852 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
853 [null_compute_pseudo],
854 [OVS_DEFINE([HAVE_NULL_COMPUTE_PSEUDO])])
855 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
856 [__skb_checksum_convert],
857 [OVS_DEFINE([HAVE_SKB_CHECKSUM_CONVERT])])
858 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
859 [max_mtu],
860 [OVS_DEFINE([HAVE_NET_DEVICE_MAX_MTU])])
8e53509c
WT		 861 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip6_tunnel.h], [__ip6_tnl_parm],
862 [erspan_ver],
863 [OVS_DEFINE([HAVE_IP6_TNL_PARM_ERSPAN_VER])])
864 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
865 [SKB_GSO_IPXIP6],
866 [OVS_DEFINE([HAVE_SKB_GSO_IPXIP6])])
867 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ipv6.h],
868 [ip6_make_flowlabel], [fl6],
869 [OVS_DEFINE([HAVE_IP6_MAKE_FLOWLABEL_FL6])])
870 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ipv6.h], [netns_sysctl_ipv6],
871 [auto_flowlabels],
872 [OVS_DEFINE([HAVE_NETNS_SYSCTL_IPV6_AUTO_FLOWLABELS])])
873 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
874 [netif_keep_dst],
875 [OVS_DEFINE([HAVE_NETIF_KEEP_DST])])
876 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
877 [ndo_get_iflink],
878 [OVS_DEFINE([HAVE_NDO_GET_IFLINK])])
879 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
880 [skb_set_inner_ipproto],
881 [OVS_DEFINE([HAVE_SKB_SET_INNER_IPPROTO])])
882 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
883 [tunnel_encap_types],
884 [OVS_DEFINE([HAVE_TUNNEL_ENCAP_TYPES])])
885 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
886 [IFLA_IPTUN_ENCAP_TYPE],
887 [OVS_DEFINE([HAVE_IFLA_IPTUN_ENCAP_TYPE])])
888 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
889 [IFLA_IPTUN_COLLECT_METADATA],
890 [OVS_DEFINE([HAVE_IFLA_IPTUN_COLLECT_METADATA])])
e1ededf4
GR		 891 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
892 [IFLA_GRE_ENCAP_DPORT])
893 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
894 [IFLA_GRE_COLLECT_METADATA])
895 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
896 [IFLA_GRE_IGNORE_DF])
897 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
898 [IFLA_GRE_FWMARK])
899 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
900 [IFLA_GRE_ERSPAN_INDEX])
901 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
902 [IFLA_GRE_ERSPAN_HWID])
436d36db
GR		 903 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_tunnel.h],
904 [IFLA_IPTUN_FWMARK])
10f24236
GR		 905 OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/skbuff.h], [sk_buff],
906 [csum_valid],
907 [OVS_DEFINE([HAVE_SKBUFF_CSUM_VALID])])
908 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
909 [skb_checksum_simple_validate])
44a629b5
GR		 910 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
911 [void.*ndo_get_stats64],
912 [OVS_DEFINE([HAVE_VOID_NDO_GET_STATS64])])
7f63d830
YS		 913 OVS_GREP_IFELSE([$KSRC/include/linux/timer.h], [init_timer_deferrable],
914 [OVS_DEFINE([HAVE_INIT_TIMER_DEFERRABLE])])
3f3b76f9
GR		 915 OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip_tunnels.h],
916 [ip_tunnel_info_opts_set], [flags],
917 [OVS_DEFINE([HAVE_IP_TUNNEL_INFO_OPTS_SET_FLAGS])])
4a90b277
GR		 918 OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
919 [rnd],
920 [OVS_DEFINE([HAVE_INET_FRAGS_RND])])
f7246940
GS		 921 OVS_GREP_IFELSE([$KSRC/include/linux/overflow.h], [__LINUX_OVERFLOW_H],
922 [OVS_DEFINE([HAVE_OVERFLOW_H])])
923 OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_array],
924 [OVS_DEFINE([HAVE_KVMALLOC_ARRAY])])
925 OVS_GREP_IFELSE([$KSRC/include/linux/mm.h], [kvmalloc_node],
926 [OVS_DEFINE([HAVE_KVMALLOC_NODE])])
21a719d6 927
22bcc0e7
JG		 928 if cmp -s datapath/linux/kcompat.h.new \
929 datapath/linux/kcompat.h >/dev/null 2>&1; then
930 rm datapath/linux/kcompat.h.new
064af421 931 else
22bcc0e7 932 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 933 fi
934])
935
f6eb6b20 936dnl Checks for net/if_dl.h.
d30e714c 937dnl
d23fa2ed
YT		 938dnl (We use this as a proxy for checking whether we're building on FreeBSD
939dnl or NetBSD.)
9360d9b7
EM		 940AC_DEFUN([OVS_CHECK_IF_DL],
941 [AC_CHECK_HEADER([net/if_dl.h],
942 [HAVE_IF_DL=yes],
943 [HAVE_IF_DL=no])
944 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
945 if test "$HAVE_IF_DL" = yes; then
946 AC_DEFINE([HAVE_IF_DL], [1],
947 [Define to 1 if net/if_dl.h is available.])
d30e714c 948
d23fa2ed 949 # On these platforms we use libpcap to access network devices.
d30e714c 950 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 951 fi])
952
e50097d2
BP		 953dnl Checks for buggy strtok_r.
954dnl
955dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
956dnl with optimization that can cause segfaults:
957dnl
958dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
959AC_DEFUN([OVS_CHECK_STRTOK_R],
960 [AC_CACHE_CHECK(
961 [whether strtok_r macro segfaults on some inputs],
962 [ovs_cv_strtok_r_bug],
963 [AC_RUN_IFELSE(
964 [AC_LANG_PROGRAM([#include <stdio.h>
965 #include <string.h>
966 ],
416e7132
BP		 967 [[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
968 /* Assume bug is present, because relatively minor
969 changes in compiler settings (e.g. optimization
970 level) can make it crop up. */
971 return 1;
972 #else
973 char string[] = ":::";
e50097d2
BP		 974 char *save_ptr = (char *) 0xc0ffee;
975 char *token1, *token2;
976 token1 = strtok_r(string, ":", &save_ptr);
977 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 978 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 979 printf ("%s %s\n", token1, token2);
980 return 0;
416e7132 981 #endif
e50097d2
BP		 982 ]])],
983 [ovs_cv_strtok_r_bug=no],
984 [ovs_cv_strtok_r_bug=yes],
985 [ovs_cv_strtok_r_bug=yes])])
986 if test $ovs_cv_strtok_r_bug = yes; then
987 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
988 [Define if strtok_r macro segfaults on some inputs])
989 fi
990])
991
064af421
BP		 992dnl ----------------------------------------------------------------------
993dnl These macros are from GNU PSPP, with the following original license:
994dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
995dnl This file is free software; the Free Software Foundation
996dnl gives unlimited permission to copy and/or distribute it,
997dnl with or without modifications, as long as this notice is preserved.
998
50194820 999AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
726af752 1000 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
064af421
BP		 1001 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
1002 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 1003 dnl Include -Werror in the compiler options, because without -Werror
1004 dnl clang's GCC-compatible compiler driver does not return a failure
1005 dnl exit status even though it complains about options it does not
1006 dnl understand.
c2deac54
YT		 1007 dnl
1008 dnl Also, check stderr as gcc exits with status 0 for options
1009 dnl rejected at getopt level.
1010 dnl % touch /tmp/a.c
1011 dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
1012 dnl gcc: unrecognized option '-Qunused-arguments'
1013 dnl 0
1014 dnl %
4c1e8cb9
BP		 1015 dnl
1016 dnl In addition, GCC does not complain about a -Wno-<foo> option that
1017 dnl it does not understand, unless it has another error to report, so
1018 dnl instead of testing for -Wno-<foo>, test for the positive version.
1019 CFLAGS="$CFLAGS $WERROR m4_bpatsubst([$1], [-Wno-], [-W])"
37f4615e
BP		 1020 AC_COMPILE_IFELSE(
1021 [AC_LANG_SOURCE([int x;])],
1022 [if test -s conftest.err && grep "unrecognized option" conftest.err
1023 then
1024 ovs_cv_name[]=no
1025 else
1026 ovs_cv_name[]=yes
1027 fi],
1028 [ovs_cv_name[]=no])
064af421
BP		 1029 CFLAGS="$ovs_save_CFLAGS"])
1030 if test $ovs_cv_name = yes; then
83f6c050 1031 m4_if([$2], [], [:], [$2])
064af421
BP		 1032 else
1033 m4_if([$3], [], [:], [$3])
1034 fi
1035])
1036
50194820
BP		 1037dnl OVS_CHECK_WERROR
1038dnl
1039dnl Check whether the C compiler accepts -Werror.
1040dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
1041AC_DEFUN([OVS_CHECK_WERROR],
1042 [WERROR=
1043 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
1044
1045dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
1046dnl Check whether the given C compiler OPTION is accepted.
1047dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
1048AC_DEFUN([OVS_CHECK_CC_OPTION],
1049 [AC_REQUIRE([OVS_CHECK_WERROR])
1050 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
1051
064af421
BP		 1052dnl OVS_ENABLE_OPTION([OPTION])
1053dnl Check whether the given C compiler OPTION is accepted.
d161c099 1054dnl If so, add it to WARNING_FLAGS.
064af421
BP		 1055dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
1056AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 1057 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
1058 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 1059
1060dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
1061dnl Check whether the given C compiler OPTION is accepted.
1062dnl If so, enable the given Automake CONDITIONAL.
1063
1064dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
1065AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
1066 [OVS_CHECK_CC_OPTION(
1067 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
1068 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 1069dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 1070
1071dnl Check for too-old XenServer.
1072AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
1073 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
1074 [if test -e /etc/redhat-release; then
1075 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
1076 fi
1077 if test -z "$ovs_cv_xsversion"; then
1078 ovs_cv_xsversion=none
1079 fi])
1080 case $ovs_cv_xsversion in
1081 none)
1082 ;;
1083
1084 [[1-9]][[0-9]]* | dnl XenServer 10 or later
1085 [[6-9]]* | dnl XenServer 6 or later
1086 5.[[7-9]]* | dnl XenServer 5.7 or later
1087 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
1088 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
1089 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
1090 ;;
1091
1092 *)
1093 AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
1094 ;;
1095 esac])
29d935d6 1096
643c0c34
BP		 1097dnl OVS_CHECK_SPARSE_TARGET
1098dnl
1099dnl The "cgcc" script from "sparse" isn't very good at detecting the
1100dnl target for which the code is being built. This helps it out.
1101AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
1102 [AC_CACHE_CHECK(
1103 [target hint for cgcc],
1104 [ac_cv_sparse_target],
1105 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
1106 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
1107 [x86_64-*], [ac_cv_sparse_target=x86_64],
1108 [ac_cv_sparse_target=other])])
1109 AS_CASE([$ac_cv_sparse_target],
0cdd5b13
BP		 1110 [x86], [SPARSEFLAGS= CGCCFLAGS="-target=i86 -target=host_os_specs"],
1111 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS="-target=x86_64 -target=host_os_specs"],
643c0c34
BP		 1112 [SPARSEFLAGS= CGCCFLAGS=])
1113 AC_SUBST([SPARSEFLAGS])
1114 AC_SUBST([CGCCFLAGS])])
1115
32e96ab7
AZ		 1116dnl OVS_SPARSE_EXTRA_INCLUDES
1117dnl
1118dnl The cgcc script from "sparse" does not search gcc's default
1119dnl search path. Get the default search path from GCC and pass
1120dnl them to sparse.
1121AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
1122 AC_SUBST([SPARSE_EXTRA_INCLUDES],
1123 [`$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 ' ' `] ))
1124
29d935d6
BP		 1125dnl OVS_ENABLE_SPARSE
1126AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 1127 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
32e96ab7 1128 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 1129 : ${SPARSE=sparse}
1130 AC_SUBST([SPARSE])
1131 AC_CONFIG_COMMANDS_PRE(
d4042a70
BP		 1132 [CC='$(if $(C:0=),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) $(SPARSE_WERROR) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])
1133
1134 AC_ARG_ENABLE(
1135 [sparse],
1136 [AC_HELP_STRING([--enable-sparse], [Run "sparse" by default])],
1137 [], [enable_sparse=no])
1138 AM_CONDITIONAL([ENABLE_SPARSE_BY_DEFAULT], [test $enable_sparse = yes])])
8a8cd0ac 1139
0eaaacac
FL		 1140dnl OVS_CTAGS_IDENTIFIERS
1141dnl
1142dnl ctags ignores symbols with extras identifiers. This builds a list of
1143dnl specially handled identifiers to be ignored.
1144AC_DEFUN([OVS_CTAGS_IDENTIFIERS],
1145 AC_SUBST([OVS_CTAGS_IDENTIFIERS_LIST],
c9990318 1146 [`printf %s '-I "'; sed -n 's/^#define \(OVS_[A-Z_]\+\)(\.\.\.)$/\1+/p' ${srcdir}/include/openvswitch/compiler.h | tr \\\n ' ' ; printf '"'`] ))
0eaaacac 1147
8a8cd0ac
BP		 1148dnl OVS_PTHREAD_SET_NAME
1149dnl
1150dnl This checks for three known variants of pthreads functions for setting
1151dnl the name of the current thread:
1152dnl
1153dnl glibc: int pthread_setname_np(pthread_t, const char *name);
1154dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
1155dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
1156dnl
1157dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
1158dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
1159dnl provide to it.
1160dnl
1161dnl This macro defines:
1162dnl
1163dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
1164dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
1165dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
1166AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
1167 [AC_CHECK_FUNCS([pthread_set_name_np])
1168 if test $ac_cv_func_pthread_set_name_np != yes; then
1169 AC_CACHE_CHECK(
1170 [for pthread_setname_np() variant],
1171 [ovs_cv_pthread_setname_np],
1172 [AC_LINK_IFELSE(
a0903134 1173 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac 1174 ], [pthread_setname_np(pthread_self(), "name");])],
a0903134 1175 [ovs_cv_pthread_setname_np=glibc],
8a8cd0ac 1176 [AC_LINK_IFELSE(
a0903134 1177 [AC_LANG_PROGRAM([#include <pthread.h>
8a8cd0ac
BP		 1178], [pthread_setname_np(pthread_self(), "%s", "name");])],
1179 [ovs_cv_pthread_setname_np=netbsd],
a0903134 1180 [ovs_cv_pthread_setname_np=none])])])
8a8cd0ac
BP		 1181 case $ovs_cv_pthread_setname_np in # (
1182 glibc)
a0903134
YT		 1183 AC_DEFINE(
1184 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
1185 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
1186 ;; # (
8a8cd0ac 1187 netbsd)
a0903134
YT		 1188 AC_DEFINE(
1189 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
1190 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
1191 ;;
8a8cd0ac
BP		 1192 esac
1193 fi])
5020f5f0
BP		 1194
1195dnl OVS_CHECK_LINUX_HOST.
1196dnl
1197dnl Checks whether we're building for a Linux host, based on the presence of
1198dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
1199dnl LINUX based on the result.
1200AC_DEFUN([OVS_CHECK_LINUX_HOST],
1201 [AC_CACHE_CHECK(
1202 [whether __linux__ is defined],
1203 [ovs_cv_linux],
1204 [AC_COMPILE_IFELSE(
1205 [AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
1206 [ovs_cv_linux=true],
1207 [ovs_cv_linux=false])])
1208 AM_CONDITIONAL([LINUX], [$ovs_cv_linux])])
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