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064af421 BP |
1 | # -*- autoconf -*- |
2 | ||
c0a0ac4f | 3 | # Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks. |
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 |
17 | dnl OVS_ENABLE_WERROR |
18 | AC_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$enable_Werror" = Xyes; then | |
25 | CFLAGS="$CFLAGS -Werror" | |
26 | fi])]) | |
27 | ||
7c9e113b | 28 | dnl OVS_CHECK_LINUX26 |
064af421 BP |
29 | dnl |
30 | dnl Configure linux kernel source tree | |
7c9e113b BP |
31 | AC_DEFUN([OVS_CHECK_LINUX26], [ |
32 | AC_ARG_WITH([l26], | |
33 | [AC_HELP_STRING([--with-l26=/path/to/linux-2.6], | |
f5fb5de6 | 34 | [Specify the linux 2.6 kernel build directory])], |
7c9e113b | 35 | [KBUILD26="$withval"], [KBUILD26=])dnl |
f5fb5de6 BP |
36 | AC_ARG_WITH([l26-source], |
37 | [AC_HELP_STRING([--with-l26-source=/path/to/linux-2.6-source], | |
38 | [Specify the linux 2.6 kernel source directory | |
39 | (usually figured out automatically from build | |
40 | directory)])], | |
41 | [KSRC26="$withval"], [KSRC26=])dnl | |
7c9e113b BP |
42 | if test -n "$KBUILD26"; then |
43 | KBUILD26=`eval echo "$KBUILD26"` | |
0b6d72fc BP |
44 | case $KBUILD26 in |
45 | /*) ;; | |
46 | *) KBUILD26=`pwd`/$KBUILD26 ;; | |
47 | esac | |
064af421 | 48 | |
7c9e113b BP |
49 | # The build directory is what the user provided. |
50 | # Make sure that it exists. | |
51 | AC_MSG_CHECKING([for Linux 2.6 build directory]) | |
52 | if test -d "$KBUILD26"; then | |
53 | AC_MSG_RESULT([$KBUILD26]) | |
54 | AC_SUBST(KBUILD26) | |
064af421 BP |
55 | else |
56 | AC_MSG_RESULT([no]) | |
7c9e113b | 57 | AC_ERROR([source dir $KBUILD26 doesn't exist]) |
064af421 BP |
58 | fi |
59 | ||
7c9e113b BP |
60 | # Debian breaks kernel headers into "source" header and "build" headers. |
61 | # We want the source headers, but $KBUILD26 gives us the "build" headers. | |
62 | # Use heuristics to find the source headers. | |
63 | AC_MSG_CHECKING([for Linux 2.6 source directory]) | |
f5fb5de6 BP |
64 | if test -n "$KSRC26"; then |
65 | KSRC26=`eval echo "$KSRC26"` | |
66 | case $KSRC26 in | |
67 | /*) ;; | |
68 | *) KSRC26=`pwd`/$KSRC26 ;; | |
b57f675c | 69 | esac |
7c9e113b | 70 | if test ! -e $KSRC26/include/linux/kernel.h; then |
f5fb5de6 BP |
71 | AC_MSG_ERROR([$KSRC26 is not a kernel source directory)]) |
72 | fi | |
73 | else | |
74 | KSRC26=$KBUILD26 | |
75 | if test ! -e $KSRC26/include/linux/kernel.h; then | |
76 | case `echo "$KBUILD26" | sed 's,/*$,,'` in # ( | |
77 | */build) | |
78 | KSRC26=`echo "$KBUILD26" | sed 's,/build/*$,/source,'` | |
79 | ;; # ( | |
80 | *) | |
81 | KSRC26=`(cd $KBUILD26 && pwd -P) | sed 's,-[[^-]]*$,-common,'` | |
82 | ;; | |
83 | esac | |
84 | fi | |
85 | if test ! -e $KSRC26/include/linux/kernel.h; then | |
86 | AC_MSG_ERROR([cannot find source directory (please use --with-l26-source)]) | |
7c9e113b BP |
87 | fi |
88 | fi | |
89 | AC_MSG_RESULT([$KSRC26]) | |
90 | ||
91 | AC_MSG_CHECKING([for kernel version]) | |
92 | patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC26/Makefile"` | |
93 | sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC26/Makefile"` | |
94 | if test -z "$patchlevel" || test -z "$sublevel"; then | |
95 | AC_ERROR([cannot determine kernel version]) | |
96 | fi | |
064af421 | 97 | AC_MSG_RESULT([2.$patchlevel.$sublevel]) |
7c9e113b BP |
98 | if test "2.$patchlevel" != '2.6'; then |
99 | if test "$BUILD26" = "$KSRC26"; then | |
100 | AC_ERROR([Linux kernel in $KBUILD26 is not version 2.6]) | |
101 | else | |
102 | AC_ERROR([Linux kernel in build tree $KBUILD26 (source tree $KSRC26) is not version 2.6]) | |
103 | fi | |
064af421 | 104 | fi |
e0510a6c BP |
105 | if test ! -e "$KBUILD26"/include/linux/version.h || \ |
106 | (test ! -e "$KBUILD26"/include/linux/autoconf.h && \ | |
107 | test ! -e "$KBUILD26"/include/generated/autoconf.h); then | |
7c9e113b | 108 | AC_MSG_ERROR([Linux kernel source in $KBUILD26 is not configured]) |
064af421 | 109 | fi |
7c9e113b | 110 | OVS_CHECK_LINUX26_COMPAT |
f5fb5de6 BP |
111 | elif test -n "$KSRC26"; then |
112 | AC_MSG_ERROR([--with-l26-source may not be specified without --with-l26]) | |
064af421 | 113 | fi |
7c9e113b | 114 | AM_CONDITIONAL(L26_ENABLED, test -n "$KBUILD26") |
064af421 BP |
115 | ]) |
116 | ||
8828e5c7 | 117 | dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH]) |
064af421 BP |
118 | dnl |
119 | dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH. | |
8828e5c7 BP |
120 | dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with |
121 | dnl <REGEX> translated to uppercase. | |
064af421 BP |
122 | AC_DEFUN([OVS_GREP_IFELSE], [ |
123 | AC_MSG_CHECKING([whether $2 matches in $1]) | |
7507ec48 JG |
124 | if test -f $1; then |
125 | grep '$2' $1 >/dev/null 2>&1 | |
126 | status=$? | |
127 | case $status in | |
128 | 0) | |
129 | AC_MSG_RESULT([yes]) | |
8828e5c7 | 130 | m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3]) |
7507ec48 JG |
131 | ;; |
132 | 1) | |
133 | AC_MSG_RESULT([no]) | |
134 | $4 | |
135 | ;; | |
136 | *) | |
137 | AC_MSG_ERROR([grep exited with status $status]) | |
138 | ;; | |
139 | esac | |
140 | else | |
141 | AC_MSG_RESULT([file not found]) | |
142 | $4 | |
143 | fi | |
064af421 BP |
144 | ]) |
145 | ||
146 | dnl OVS_DEFINE(NAME) | |
147 | dnl | |
148 | dnl Defines NAME to 1 in kcompat.h. | |
149 | AC_DEFUN([OVS_DEFINE], [ | |
150 | echo '#define $1 1' >> datapath/linux-2.6/kcompat.h.new | |
151 | ]) | |
152 | ||
064af421 BP |
153 | AC_DEFUN([OVS_CHECK_LOG2_H], [ |
154 | AC_MSG_CHECKING([for $KSRC26/include/linux/log2.h]) | |
155 | if test -e $KSRC26/include/linux/log2.h; then | |
156 | AC_MSG_RESULT([yes]) | |
157 | OVS_DEFINE([HAVE_LOG2_H]) | |
158 | else | |
159 | AC_MSG_RESULT([no]) | |
160 | fi | |
161 | ]) | |
162 | ||
163 | dnl OVS_CHECK_LINUX26_COMPAT | |
164 | dnl | |
165 | dnl Runs various Autoconf checks on the Linux 2.6 kernel source in | |
7c9e113b | 166 | dnl the directory in $KBUILD26. |
064af421 BP |
167 | AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [ |
168 | rm -f datapath/linux-2.6/kcompat.h.new | |
169 | mkdir -p datapath/linux-2.6 | |
170 | : > datapath/linux-2.6/kcompat.h.new | |
4aa13c0c | 171 | |
25fb3596 JG |
172 | OVS_GREP_IFELSE([$KSRC26/arch/x86/include/asm/checksum_32.h], [src_err,], |
173 | [OVS_DEFINE([HAVE_CSUM_COPY_DBG])]) | |
174 | ||
8828e5c7 | 175 | OVS_GREP_IFELSE([$KSRC26/include/linux/err.h], [ERR_CAST]) |
4aa13c0c | 176 | |
8828e5c7 | 177 | OVS_GREP_IFELSE([$KSRC26/include/linux/in.h], [ipv4_is_multicast]) |
4aa13c0c | 178 | |
8828e5c7 BP |
179 | OVS_GREP_IFELSE([$KSRC26/include/linux/netdevice.h], [dev_disable_lro]) |
180 | OVS_GREP_IFELSE([$KSRC26/include/linux/netdevice.h], [dev_get_stats]) | |
23e795f4 | 181 | OVS_GREP_IFELSE([$KSRC26/include/linux/netdevice.h], [dev_get_by_index_rcu]) |
4aa13c0c | 182 | |
cf6cb3a2 JG |
183 | OVS_GREP_IFELSE([$KSRC26/include/linux/rcupdate.h], [rcu_read_lock_held], [], |
184 | [OVS_GREP_IFELSE([$KSRC26/include/linux/rtnetlink.h], | |
185 | [rcu_read_lock_held])]) | |
186 | ||
6a33828d BP |
187 | # Check for the proto_data_valid member in struct sk_buff. The [^@] |
188 | # is necessary because some versions of this header remove the | |
189 | # member but retain the kerneldoc comment that describes it (which | |
190 | # starts with @). The brackets must be doubled because of m4 | |
191 | # quoting rules. | |
192 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [[[^@]]proto_data_valid], | |
193 | [OVS_DEFINE([HAVE_PROTO_DATA_VALID])]) | |
4aa13c0c BP |
194 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [raw], |
195 | [OVS_DEFINE([HAVE_MAC_RAW])]) | |
85444c3f BP |
196 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_dst(], |
197 | [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])]) | |
4aa13c0c | 198 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], |
8828e5c7 BP |
199 | [skb_copy_from_linear_data_offset]) |
200 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_cow_head]) | |
4aa13c0c BP |
201 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_transport_header], |
202 | [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])]) | |
d31f1109 JP |
203 | OVS_GREP_IFELSE([$KSRC26/include/linux/icmpv6.h], [icmp6_hdr], |
204 | [OVS_DEFINE([HAVE_ICMP6_HDR])]) | |
4aa13c0c BP |
205 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_warn_if_lro], |
206 | [OVS_DEFINE([HAVE_SKB_WARN_LRO])]) | |
207 | ||
8828e5c7 BP |
208 | OVS_GREP_IFELSE([$KSRC26/include/linux/string.h], [kmemdup], [], |
209 | [OVS_GREP_IFELSE([$KSRC26/include/linux/slab.h], [kmemdup])]) | |
4aa13c0c BP |
210 | |
211 | OVS_GREP_IFELSE([$KSRC26/include/linux/types.h], [bool], | |
212 | [OVS_DEFINE([HAVE_BOOL_TYPE])]) | |
e215ebca JG |
213 | OVS_GREP_IFELSE([$KSRC26/include/linux/types.h], [__wsum], |
214 | [OVS_DEFINE([HAVE_CSUM_TYPES])]) | |
4aa13c0c | 215 | |
918097da | 216 | OVS_GREP_IFELSE([$KSRC26/include/net/checksum.h], [csum_replace4]) |
8828e5c7 | 217 | OVS_GREP_IFELSE([$KSRC26/include/net/checksum.h], [csum_unfold]) |
4aa13c0c | 218 | |
8828e5c7 BP |
219 | OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [NLA_NUL_STRING]) |
220 | OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [nla_get_be16]) | |
c0a0ac4f | 221 | OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [nla_find_nested]) |
4aa13c0c | 222 | |
1269f7ae BP |
223 | OVS_GREP_IFELSE([$KSRC26/include/linux/if_link.h], [rtnl_link_stats64]) |
224 | ||
431488e6 BP |
225 | OVS_GREP_IFELSE([$KSRC26/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD], |
226 | [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])]) | |
227 | ||
064af421 | 228 | OVS_CHECK_LOG2_H |
4aa13c0c | 229 | |
064af421 BP |
230 | if cmp -s datapath/linux-2.6/kcompat.h.new \ |
231 | datapath/linux-2.6/kcompat.h >/dev/null 2>&1; then | |
232 | rm datapath/linux-2.6/kcompat.h.new | |
233 | else | |
234 | mv datapath/linux-2.6/kcompat.h.new datapath/linux-2.6/kcompat.h | |
235 | fi | |
236 | ]) | |
237 | ||
238 | dnl Checks for net/if_packet.h. | |
239 | AC_DEFUN([OVS_CHECK_IF_PACKET], | |
240 | [AC_CHECK_HEADER([net/if_packet.h], | |
241 | [HAVE_IF_PACKET=yes], | |
242 | [HAVE_IF_PACKET=no]) | |
243 | AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes]) | |
244 | if test "$HAVE_IF_PACKET" = yes; then | |
245 | AC_DEFINE([HAVE_IF_PACKET], [1], | |
246 | [Define to 1 if net/if_packet.h is available.]) | |
247 | fi]) | |
248 | ||
e50097d2 BP |
249 | dnl Checks for buggy strtok_r. |
250 | dnl | |
251 | dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling | |
252 | dnl with optimization that can cause segfaults: | |
253 | dnl | |
254 | dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614. | |
255 | AC_DEFUN([OVS_CHECK_STRTOK_R], | |
256 | [AC_CACHE_CHECK( | |
257 | [whether strtok_r macro segfaults on some inputs], | |
258 | [ovs_cv_strtok_r_bug], | |
259 | [AC_RUN_IFELSE( | |
260 | [AC_LANG_PROGRAM([#include <stdio.h> | |
261 | #include <string.h> | |
262 | ], | |
263 | [[char string[] = ":::"; | |
264 | char *save_ptr = (char *) 0xc0ffee; | |
265 | char *token1, *token2; | |
266 | token1 = strtok_r(string, ":", &save_ptr); | |
267 | token2 = strtok_r(NULL, ":", &save_ptr); | |
5819a7cd | 268 | freopen ("/dev/null", "w", stdout); |
e50097d2 BP |
269 | printf ("%s %s\n", token1, token2); |
270 | return 0; | |
271 | ]])], | |
272 | [ovs_cv_strtok_r_bug=no], | |
273 | [ovs_cv_strtok_r_bug=yes], | |
274 | [ovs_cv_strtok_r_bug=yes])]) | |
275 | if test $ovs_cv_strtok_r_bug = yes; then | |
276 | AC_DEFINE([HAVE_STRTOK_R_BUG], [1], | |
277 | [Define if strtok_r macro segfaults on some inputs]) | |
278 | fi | |
279 | ]) | |
280 | ||
064af421 BP |
281 | dnl ---------------------------------------------------------------------- |
282 | dnl These macros are from GNU PSPP, with the following original license: | |
283 | dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. | |
284 | dnl This file is free software; the Free Software Foundation | |
285 | dnl gives unlimited permission to copy and/or distribute it, | |
286 | dnl with or without modifications, as long as this notice is preserved. | |
287 | ||
288 | dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED]) | |
289 | dnl Check whether the given C compiler OPTION is accepted. | |
290 | dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED. | |
291 | AC_DEFUN([OVS_CHECK_CC_OPTION], | |
292 | [ | |
293 | m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-], [_])])dnl | |
294 | AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name], | |
295 | [ovs_save_CFLAGS="$CFLAGS" | |
296 | CFLAGS="$CFLAGS $1" | |
297 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no]) | |
298 | CFLAGS="$ovs_save_CFLAGS"]) | |
299 | if test $ovs_cv_name = yes; then | |
83f6c050 | 300 | m4_if([$2], [], [:], [$2]) |
064af421 BP |
301 | else |
302 | m4_if([$3], [], [:], [$3]) | |
303 | fi | |
304 | ]) | |
305 | ||
306 | dnl OVS_ENABLE_OPTION([OPTION]) | |
307 | dnl Check whether the given C compiler OPTION is accepted. | |
d161c099 | 308 | dnl If so, add it to WARNING_FLAGS. |
064af421 BP |
309 | dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement]) |
310 | AC_DEFUN([OVS_ENABLE_OPTION], | |
d161c099 BP |
311 | [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"]) |
312 | AC_SUBST([WARNING_FLAGS])]) | |
c72e245a BP |
313 | |
314 | dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL]) | |
315 | dnl Check whether the given C compiler OPTION is accepted. | |
316 | dnl If so, enable the given Automake CONDITIONAL. | |
317 | ||
318 | dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED]) | |
319 | AC_DEFUN([OVS_CONDITIONAL_CC_OPTION], | |
320 | [OVS_CHECK_CC_OPTION( | |
321 | [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no]) | |
322 | AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])]) | |
064af421 | 323 | dnl ---------------------------------------------------------------------- |
ed2d4f6a BP |
324 | |
325 | dnl Check for too-old XenServer. | |
326 | AC_DEFUN([OVS_CHECK_XENSERVER_VERSION], | |
327 | [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion], | |
328 | [if test -e /etc/redhat-release; then | |
329 | ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release` | |
330 | fi | |
331 | if test -z "$ovs_cv_xsversion"; then | |
332 | ovs_cv_xsversion=none | |
333 | fi]) | |
334 | case $ovs_cv_xsversion in | |
335 | none) | |
336 | ;; | |
337 | ||
338 | [[1-9]][[0-9]]* | dnl XenServer 10 or later | |
339 | [[6-9]]* | dnl XenServer 6 or later | |
340 | 5.[[7-9]]* | dnl XenServer 5.7 or later | |
341 | 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later | |
342 | 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later | |
343 | 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later | |
344 | ;; | |
345 | ||
346 | *) | |
347 | 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.)]) | |
348 | ;; | |
349 | esac]) |