forked from openvswitch/ovs
-
Notifications
You must be signed in to change notification settings - Fork 0
/
acinclude.m4
1001 lines (916 loc) · 41.2 KB
/
acinclude.m4
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# -*- autoconf -*-
# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
dnl OVS_ENABLE_WERROR
AC_DEFUN([OVS_ENABLE_WERROR],
[AC_ARG_ENABLE(
[Werror],
[AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
[], [enable_Werror=no])
AC_CONFIG_COMMANDS_PRE(
[if test "X$enable_Werror" = Xyes; then
OVS_CFLAGS="$OVS_CFLAGS -Werror"
fi])])
dnl OVS_CHECK_LINUX
dnl
dnl Configure linux kernel source tree
AC_DEFUN([OVS_CHECK_LINUX], [
AC_ARG_WITH([linux],
[AC_HELP_STRING([--with-linux=/path/to/linux],
[Specify the Linux kernel build directory])])
AC_ARG_WITH([linux-source],
[AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
[Specify the Linux kernel source directory
(usually figured out automatically from build
directory)])])
# Deprecated equivalents to --with-linux, --with-linux-source.
AC_ARG_WITH([l26])
AC_ARG_WITH([l26-source])
if test X"$with_linux" != X; then
KBUILD=$with_linux
elif test X"$with_l26" != X; then
KBUILD=$with_l26
AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
else
KBUILD=
fi
if test X"$KBUILD" != X; then
if test X"$with_linux_source" != X; then
KSRC=$with_linux_source
elif test X"$with_l26_source" != X; then
KSRC=$with_l26_source
AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
else
KSRC=
fi
elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
fi
if test -n "$KBUILD"; then
KBUILD=`eval echo "$KBUILD"`
case $KBUILD in
/*) ;;
*) KBUILD=`pwd`/$KBUILD ;;
esac
# The build directory is what the user provided.
# Make sure that it exists.
AC_MSG_CHECKING([for Linux build directory])
if test -d "$KBUILD"; then
AC_MSG_RESULT([$KBUILD])
AC_SUBST(KBUILD)
else
AC_MSG_RESULT([no])
AC_ERROR([source dir $KBUILD doesn't exist])
fi
# Debian breaks kernel headers into "source" header and "build" headers.
# We want the source headers, but $KBUILD gives us the "build" headers.
# Use heuristics to find the source headers.
AC_MSG_CHECKING([for Linux source directory])
if test -n "$KSRC"; then
KSRC=`eval echo "$KSRC"`
case $KSRC in
/*) ;;
*) KSRC=`pwd`/$KSRC ;;
esac
if test ! -e $KSRC/include/linux/kernel.h; then
AC_MSG_ERROR([$KSRC is not a kernel source directory])
fi
else
KSRC=$KBUILD
if test ! -e $KSRC/include/linux/kernel.h; then
# Debian kernel build Makefiles tend to include a line of the form:
# MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
# First try to extract the source directory from this line.
KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
if test ! -e "$KSRC"/include/linux/kernel.h; then
# Didn't work. Fall back to name-based heuristics that used to work.
case `echo "$KBUILD" | sed 's,/*$,,'` in # (
*/build)
KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
;; # (
*)
KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
;;
esac
fi
fi
if test ! -e "$KSRC"/include/linux/kernel.h; then
AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
fi
fi
AC_MSG_RESULT([$KSRC])
AC_MSG_CHECKING([for kernel version])
version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
if test X"$version" = X || test X"$patchlevel" = X; then
AC_ERROR([cannot determine kernel version])
elif test X"$sublevel" = X; then
kversion=$version.$patchlevel
else
kversion=$version.$patchlevel.$sublevel
fi
AC_MSG_RESULT([$kversion])
if test "$version" -ge 4; then
if test "$version" = 4 && test "$patchlevel" -le 7; then
: # Linux 4.x
else
AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.7.x is not supported (please refer to the FAQ for advice)])
fi
elif test "$version" = 3 && test "$patchlevel" -ge 10; then
: # Linux 3.x
else
AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
fi
if (test ! -e "$KBUILD"/include/linux/version.h && \
test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
(test ! -e "$KBUILD"/include/linux/autoconf.h && \
test ! -e "$KBUILD"/include/generated/autoconf.h); then
AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
fi
OVS_CHECK_LINUX_COMPAT
fi
AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
])
dnl OVS_CHECK_DPDK
dnl
dnl Configure DPDK source tree
AC_DEFUN([OVS_CHECK_DPDK], [
AC_ARG_WITH([dpdk],
[AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
[Specify the DPDK build directory])],
[have_dpdk=true])
AC_MSG_CHECKING([whether dpdk datapath is enabled])
if test "$have_dpdk" != true || test "$with_dpdk" = no; then
AC_MSG_RESULT([no])
DPDKLIB_FOUND=false
else
AC_MSG_RESULT([yes])
case "$with_dpdk" in
yes)
DPDK_AUTO_DISCOVER="true"
DPDK_INCLUDE="/usr/local/include/dpdk -I/usr/include/dpdk"
;;
*)
DPDK_AUTO_DISCOVER="false"
DPDK_INCLUDE="$with_dpdk/include"
# If 'with_dpdk' is passed install directory, point to headers
# installed in $DESTDIR/$prefix/include/dpdk
AC_CHECK_FILE([$DPDK_INCLUDE/rte_config.h], [],
[AC_CHECK_FILE([$DPDK_INCLUDE/dpdk/rte_config.h],
[DPDK_INCLUDE=$DPDK_INCLUDE/dpdk], [])])
DPDK_LIB_DIR="$with_dpdk/lib"
;;
esac
DPDK_LIB="-ldpdk"
DPDK_EXTRA_LIB=""
ovs_save_CFLAGS="$CFLAGS"
ovs_save_LDFLAGS="$LDFLAGS"
CFLAGS="$CFLAGS -I$DPDK_INCLUDE"
if test "$DPDK_AUTO_DISCOVER" = "false"; then
LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
fi
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[
#include <rte_config.h>
#if RTE_LIBRTE_VHOST_NUMA
#error
#endif
], [])
], [],
[AC_SEARCH_LIBS([get_mempolicy],[numa],[],[AC_MSG_ERROR([unable to find libnuma, install the dependency package])])
DPDK_EXTRA_LIB="-lnuma"
AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[
#include <rte_config.h>
#if RTE_LIBRTE_PMD_PCAP
#error
#endif
], [])
], [],
[AC_SEARCH_LIBS([pcap_dump],[pcap],[],[AC_MSG_ERROR([unable to find libpcap, install the dependency package])])
DPDK_EXTRA_LIB="-lpcap"
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[
#include <rte_config.h>
#if RTE_LIBRTE_PDUMP
#error
#endif
], [])
], [],
[AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])])
])
# On some systems we have to add -ldl to link with dpdk
#
# This code, at first, tries to link without -ldl (""),
# then adds it and tries again.
# Before each attempt the search cache must be unset,
# otherwise autoconf will stick with the old result
DPDKLIB_FOUND=false
save_LIBS=$LIBS
for extras in "" "-ldl"; do
LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <rte_config.h>
#include <rte_eal.h>],
[int rte_argc; char ** rte_argv;
rte_eal_init(rte_argc, rte_argv);])],
[DPDKLIB_FOUND=true])
if $DPDKLIB_FOUND; then
break
fi
done
# If linking unsuccessful
if test "$DPDKLIB_FOUND" = "false" ; then
if $DPDK_AUTO_DISCOVER; then
AC_MSG_ERROR([Could not find DPDK library in default search path, Use --with-dpdk to specify the DPDK library installed in non-standard location])
else
AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
fi
fi
CFLAGS="$ovs_save_CFLAGS"
LDFLAGS="$ovs_save_LDFLAGS"
if test "$DPDK_AUTO_DISCOVER" = "false"; then
OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
fi
OVS_CFLAGS="$OVS_CFLAGS -I$DPDK_INCLUDE"
OVS_ENABLE_OPTION([-mssse3])
# DPDK pmd drivers are not linked unless --whole-archive is used.
#
# This happens because the rest of the DPDK code doesn't use any symbol in
# the pmd driver objects, and the drivers register themselves using an
# __attribute__((constructor)) function.
#
# These options are specified inside a single -Wl directive to prevent
# autotools from reordering them.
DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
AC_SUBST([DPDK_vswitchd_LDFLAGS])
AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
fi
AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
])
dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
dnl
dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
dnl <REGEX> translated to uppercase.
AC_DEFUN([OVS_GREP_IFELSE], [
AC_MSG_CHECKING([whether $2 matches in $1])
if test -f $1; then
grep '$2' $1 >/dev/null 2>&1
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
;;
1)
AC_MSG_RESULT([no])
$4
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$4
fi
])
dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
dnl
dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
dnl structure definition. If this is successful, runs IF-MATCH, otherwise
dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
dnl translated to uppercase.
AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
AC_MSG_CHECKING([whether $2 has member $3 in $1])
if test -f $1; then
awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
;;
1)
AC_MSG_RESULT([no])
$5
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$5
fi
])
dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
dnl
dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
dnl the function signature starting from the line matching FUNCTION
dnl and ending with the line containing the closing parenthesis. If
dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
dnl IF-MATCH is empty then it defines to
dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
dnl <REGEX> translated to uppercase.
AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
if test -f $1; then
awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
;;
1)
AC_MSG_RESULT([no])
$5
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$5
fi
])
dnl OVS_DEFINE(NAME)
dnl
dnl Defines NAME to 1 in kcompat.h.
AC_DEFUN([OVS_DEFINE], [
echo '#define $1 1' >> datapath/linux/kcompat.h.new
])
dnl OVS_CHECK_LINUX_COMPAT
dnl
dnl Runs various Autoconf checks on the Linux kernel source in
dnl the directory in $KBUILD.
AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
rm -f datapath/linux/kcompat.h.new
mkdir -p datapath/linux
: > datapath/linux/kcompat.h.new
echo '#include <linux/version.h>
#ifndef RHEL_RELEASE_CODE
#define RHEL_RELEASE_CODE 0
#define RHEL_RELEASE_VERSION(a, b) 0
#endif' >> datapath/linux/kcompat.h.new
OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
[OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
[OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
[OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
[OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
[OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
[OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
[ip_do_fragment], [net],
[OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
[ip_local_out], [net],
[OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
[OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
[OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
[OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
[frags_work])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
[rwlock])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
[list_evictor])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
[OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
dnl OVS does not really need ipv6 label field, but its presence signifies that
dnl the stack has all required ipv6 support.
dnl OVS also does not need dst_cache But this dependency allows us to write
dnl much cleaner code.
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
[label],
[OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
[iptunnel_pull_offloads],
[OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
[OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])
OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
[OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
[OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
dnl So check type of tstats.
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
[OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
[OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
[OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
[netdev_master_upper_dev_link], [upper_priv],
[OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
[OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
[OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
[owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
[fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_tmpl_alloc], [nf_conntrack_zone],
[OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_get_tuplepr], [struct.net],
[OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
[nf_ct_zone_init])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
[nf_connlabels_get])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
[nf_connlabels_get], [int bit],
[OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
[nf_ct_frag6_consume_orig])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
[nf_ct_frag6_output])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
[OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
[OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
[rcu_read_lock_held])])
OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
# Check for the proto_data_valid member in struct sk_buff. The [^@]
# is necessary because some versions of this header remove the
# member but retain the kerneldoc comment that describes it (which
# starts with @). The brackets must be doubled because of m4
# quoting rules.
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
[OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
[OVS_DEFINE([HAVE_U16_RXHASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
[OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[skb_copy_from_linear_data_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[skb_reset_tail_pointer])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
[OVS_DEFINE([HAVE_SKB_WARN_LRO])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
[OVS_DEFINE([HAVE_SKB_GET_HASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
[OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
[OVS_DEFINE([HAVE_L4_RXHASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
[OVS_DEFINE([HAVE_BOOL_TYPE])])
OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
[OVS_DEFINE([HAVE_CSUM_TYPES])])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
[OVS_DEFINE([HAVE_CSUM_TYPES])])
OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
[OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
[OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
[genl_notify], [net],
[OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
[genl_multicast_group], [id])
OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
[OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
[OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
[OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
[OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
[OVS_DEFINE([HAVE_VXLAN_METADATA])])
OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
[OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
[OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
[OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
[gro_receive])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
[OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
[OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
[OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
[udp_add_offload], [net],
[OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
if cmp -s datapath/linux/kcompat.h.new \
datapath/linux/kcompat.h >/dev/null 2>&1; then
rm datapath/linux/kcompat.h.new
else
mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
fi
])
dnl Checks for net/if_packet.h.
AC_DEFUN([OVS_CHECK_IF_PACKET],
[AC_CHECK_HEADER([net/if_packet.h],
[HAVE_IF_PACKET=yes],
[HAVE_IF_PACKET=no])
AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
if test "$HAVE_IF_PACKET" = yes; then
AC_DEFINE([HAVE_IF_PACKET], [1],
[Define to 1 if net/if_packet.h is available.])
fi])
dnl Checks for net/if_dl.h.
dnl
dnl (We use this as a proxy for checking whether we're building on FreeBSD
dnl or NetBSD.)
AC_DEFUN([OVS_CHECK_IF_DL],
[AC_CHECK_HEADER([net/if_dl.h],
[HAVE_IF_DL=yes],
[HAVE_IF_DL=no])
AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
if test "$HAVE_IF_DL" = yes; then
AC_DEFINE([HAVE_IF_DL], [1],
[Define to 1 if net/if_dl.h is available.])
# On these platforms we use libpcap to access network devices.
AC_SEARCH_LIBS([pcap_open_live], [pcap])
fi])
dnl Checks for buggy strtok_r.
dnl
dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
dnl with optimization that can cause segfaults:
dnl
dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
AC_DEFUN([OVS_CHECK_STRTOK_R],
[AC_CACHE_CHECK(
[whether strtok_r macro segfaults on some inputs],
[ovs_cv_strtok_r_bug],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM([#include <stdio.h>
#include <string.h>
],
[[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
/* Assume bug is present, because relatively minor
changes in compiler settings (e.g. optimization
level) can make it crop up. */
return 1;
#else
char string[] = ":::";
char *save_ptr = (char *) 0xc0ffee;
char *token1, *token2;
token1 = strtok_r(string, ":", &save_ptr);
token2 = strtok_r(NULL, ":", &save_ptr);
freopen ("/dev/null", "w", stdout);
printf ("%s %s\n", token1, token2);
return 0;
#endif
]])],
[ovs_cv_strtok_r_bug=no],
[ovs_cv_strtok_r_bug=yes],
[ovs_cv_strtok_r_bug=yes])])
if test $ovs_cv_strtok_r_bug = yes; then
AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
[Define if strtok_r macro segfaults on some inputs])
fi
])
dnl ----------------------------------------------------------------------
dnl These macros are from GNU PSPP, with the following original license:
dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-=], [__])])dnl
AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
[ovs_save_CFLAGS="$CFLAGS"
dnl Include -Werror in the compiler options, because without -Werror
dnl clang's GCC-compatible compiler driver does not return a failure
dnl exit status even though it complains about options it does not
dnl understand.
dnl
dnl Also, check stderr as gcc exits with status 0 for options
dnl rejected at getopt level.
dnl % touch /tmp/a.c
dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
dnl gcc: unrecognized option '-Qunused-arguments'
dnl 0
dnl %
CFLAGS="$CFLAGS $WERROR $1"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [if test -s conftest.err && grep "unrecognized option" conftest.err; then ovs_cv_name[]=no; else ovs_cv_name[]=yes; fi], [ovs_cv_name[]=no])
CFLAGS="$ovs_save_CFLAGS"])
if test $ovs_cv_name = yes; then
m4_if([$2], [], [:], [$2])
else
m4_if([$3], [], [:], [$3])
fi
])
dnl OVS_CHECK_WERROR
dnl
dnl Check whether the C compiler accepts -Werror.
dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
AC_DEFUN([OVS_CHECK_WERROR],
[WERROR=
_OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
AC_DEFUN([OVS_CHECK_CC_OPTION],
[AC_REQUIRE([OVS_CHECK_WERROR])
_OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
dnl OVS_ENABLE_OPTION([OPTION])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, add it to WARNING_FLAGS.
dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
AC_DEFUN([OVS_ENABLE_OPTION],
[OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
AC_SUBST([WARNING_FLAGS])])
dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, enable the given Automake CONDITIONAL.
dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
[OVS_CHECK_CC_OPTION(
[$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
dnl ----------------------------------------------------------------------
dnl Check for too-old XenServer.
AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
[AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
[if test -e /etc/redhat-release; then
ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
fi
if test -z "$ovs_cv_xsversion"; then
ovs_cv_xsversion=none
fi])
case $ovs_cv_xsversion in
none)
;;
[[1-9]][[0-9]]* | dnl XenServer 10 or later
[[6-9]]* | dnl XenServer 6 or later
5.[[7-9]]* | dnl XenServer 5.7 or later
5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
;;
*)
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.)])
;;
esac])
dnl OVS_MAKE_HAS_IF([if-true], [if-false])
dnl
dnl Checks whether make has the GNU make $(if condition,then,else) extension.
dnl Runs 'if-true' if so, 'if-false' otherwise.
AC_DEFUN([OVS_CHECK_MAKE_IF],
[AC_CACHE_CHECK(
[whether ${MAKE-make} has GNU make \$(if) extension],
[ovs_cv_gnu_make_if],
[cat <<'EOF' > conftest.mk
conftest.out:
echo $(if x,y,z) > conftest.out
.PHONY: all
EOF
rm -f conftest.out
AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
result=`cat conftest.out`
rm -f conftest.mk conftest.out
if test "X$result" = "Xy"; then
ovs_cv_gnu_make_if=yes
else
ovs_cv_gnu_make_if=no
fi])])
dnl OVS_CHECK_GNU_MAKE
dnl
dnl Checks whether make is GNU make (because Linux kernel Makefiles
dnl only work with GNU make).
AC_DEFUN([OVS_CHECK_GNU_MAKE],
[AC_CACHE_CHECK(
[whether ${MAKE-make} is GNU make],
[ovs_cv_gnu_make],
[rm -f conftest.out
AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
${MAKE-make} --version >conftest.out 2>&1
cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
result=`cat conftest.out`
rm -f conftest.mk conftest.out
case $result in # (
GNU*) ovs_cv_gnu_make=yes ;; # (
*) ovs_cv_gnu_make=no ;;
esac])
AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
dnl OVS_CHECK_SPARSE_TARGET
dnl
dnl The "cgcc" script from "sparse" isn't very good at detecting the
dnl target for which the code is being built. This helps it out.
AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
[AC_CACHE_CHECK(
[target hint for cgcc],
[ac_cv_sparse_target],
[AS_CASE([`$CC -dumpmachine 2>/dev/null`],
[i?86-* | athlon-*], [ac_cv_sparse_target=x86],
[x86_64-*], [ac_cv_sparse_target=x86_64],
[ac_cv_sparse_target=other])])
AS_CASE([$ac_cv_sparse_target],
[x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
[x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
[SPARSEFLAGS= CGCCFLAGS=])
AC_SUBST([SPARSEFLAGS])
AC_SUBST([CGCCFLAGS])])
dnl OVS_SPARSE_EXTRA_INCLUDES
dnl
dnl The cgcc script from "sparse" does not search gcc's default
dnl search path. Get the default search path from GCC and pass
dnl them to sparse.
AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
AC_SUBST([SPARSE_EXTRA_INCLUDES],
[`$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 ' ' `] ))
dnl OVS_ENABLE_SPARSE
AC_DEFUN([OVS_ENABLE_SPARSE],
[AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
AC_REQUIRE([OVS_CHECK_MAKE_IF])
AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
: ${SPARSE=sparse}
AC_SUBST([SPARSE])
AC_CONFIG_COMMANDS_PRE(
[if test $ovs_cv_gnu_make_if = yes; then
CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
fi])])
dnl OVS_PTHREAD_SET_NAME
dnl
dnl This checks for three known variants of pthreads functions for setting
dnl the name of the current thread:
dnl
dnl glibc: int pthread_setname_np(pthread_t, const char *name);
dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
dnl
dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
dnl provide to it.
dnl
dnl This macro defines:
dnl
dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
[AC_CHECK_FUNCS([pthread_set_name_np])
if test $ac_cv_func_pthread_set_name_np != yes; then
AC_CACHE_CHECK(
[for pthread_setname_np() variant],
[ovs_cv_pthread_setname_np],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <pthread.h>
], [pthread_setname_np(pthread_self(), "name");])],
[ovs_cv_pthread_setname_np=glibc],
[AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <pthread.h>
], [pthread_setname_np(pthread_self(), "%s", "name");])],
[ovs_cv_pthread_setname_np=netbsd],
[ovs_cv_pthread_setname_np=none])])])
case $ovs_cv_pthread_setname_np in # (
glibc)
AC_DEFINE(
[HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
[Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
;; # (
netbsd)
AC_DEFINE(
[HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
[Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
;;
esac
fi])
dnl OVS_CHECK_LINUX_HOST.
dnl
dnl Checks whether we're building for a Linux host, based on the presence of
dnl the __linux__ preprocessor symbol, and sets up an Automake conditional
dnl LINUX based on the result.
AC_DEFUN([OVS_CHECK_LINUX_HOST],
[AC_CACHE_CHECK(
[whether __linux__ is defined],
[ovs_cv_linux],
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([enum { LINUX = __linux__};], [])],
[ovs_cv_linux=true],
[ovs_cv_linux=false])])