]>
Commit | Line | Data |
---|---|---|
064af421 BP |
1 | # -*- autoconf -*- |
2 | ||
b57f675c | 3 | # Copyright (c) 2008, 2009, 2010 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 | |
7c9e113b | 17 | dnl OVS_CHECK_LINUX26 |
064af421 BP |
18 | dnl |
19 | dnl Configure linux kernel source tree | |
7c9e113b BP |
20 | AC_DEFUN([OVS_CHECK_LINUX26], [ |
21 | AC_ARG_WITH([l26], | |
22 | [AC_HELP_STRING([--with-l26=/path/to/linux-2.6], | |
23 | [Specify the linux 2.6 kernel sources])], | |
24 | [KBUILD26="$withval"], [KBUILD26=])dnl | |
25 | if test -n "$KBUILD26"; then | |
26 | KBUILD26=`eval echo "$KBUILD26"` | |
064af421 | 27 | |
7c9e113b BP |
28 | # The build directory is what the user provided. |
29 | # Make sure that it exists. | |
30 | AC_MSG_CHECKING([for Linux 2.6 build directory]) | |
31 | if test -d "$KBUILD26"; then | |
32 | AC_MSG_RESULT([$KBUILD26]) | |
33 | AC_SUBST(KBUILD26) | |
064af421 BP |
34 | else |
35 | AC_MSG_RESULT([no]) | |
7c9e113b | 36 | AC_ERROR([source dir $KBUILD26 doesn't exist]) |
064af421 BP |
37 | fi |
38 | ||
7c9e113b BP |
39 | # Debian breaks kernel headers into "source" header and "build" headers. |
40 | # We want the source headers, but $KBUILD26 gives us the "build" headers. | |
41 | # Use heuristics to find the source headers. | |
42 | AC_MSG_CHECKING([for Linux 2.6 source directory]) | |
43 | KSRC26=$KBUILD26 | |
44 | if test ! -e $KSRC26/include/linux/kernel.h; then | |
b57f675c BP |
45 | case `echo "$KBUILD26" | sed 's,/*$,,'` in # ( |
46 | */build) | |
47 | KSRC26=`echo "$KBUILD26" | sed 's,/build/*$,/source,'` | |
48 | ;; # ( | |
49 | *) | |
50 | KSRC26=`(cd $KBUILD26 && pwd -P) | sed 's,-[[^-]]*$,-common,'` | |
51 | ;; | |
52 | esac | |
7c9e113b BP |
53 | if test ! -e $KSRC26/include/linux/kernel.h; then |
54 | AC_MSG_ERROR([cannot find source directory]) | |
55 | fi | |
56 | fi | |
57 | AC_MSG_RESULT([$KSRC26]) | |
58 | ||
59 | AC_MSG_CHECKING([for kernel version]) | |
60 | patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC26/Makefile"` | |
61 | sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC26/Makefile"` | |
62 | if test -z "$patchlevel" || test -z "$sublevel"; then | |
63 | AC_ERROR([cannot determine kernel version]) | |
64 | fi | |
064af421 | 65 | AC_MSG_RESULT([2.$patchlevel.$sublevel]) |
7c9e113b BP |
66 | if test "2.$patchlevel" != '2.6'; then |
67 | if test "$BUILD26" = "$KSRC26"; then | |
68 | AC_ERROR([Linux kernel in $KBUILD26 is not version 2.6]) | |
69 | else | |
70 | AC_ERROR([Linux kernel in build tree $KBUILD26 (source tree $KSRC26) is not version 2.6]) | |
71 | fi | |
064af421 | 72 | fi |
7c9e113b BP |
73 | if ! test -e "$KBUILD26"/include/linux/version.h || \ |
74 | ! test -e "$KBUILD26"/include/linux/autoconf.h; then | |
75 | AC_MSG_ERROR([Linux kernel source in $KBUILD26 is not configured]) | |
064af421 | 76 | fi |
7c9e113b | 77 | OVS_CHECK_LINUX26_COMPAT |
064af421 | 78 | fi |
7c9e113b | 79 | AM_CONDITIONAL(L26_ENABLED, test -n "$KBUILD26") |
064af421 BP |
80 | ]) |
81 | ||
82 | dnl OVS_GREP_IFELSE(FILE, REGEX, IF-MATCH, IF-NO-MATCH) | |
83 | dnl | |
84 | dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH. | |
85 | AC_DEFUN([OVS_GREP_IFELSE], [ | |
86 | AC_MSG_CHECKING([whether $2 matches in $1]) | |
87 | grep '$2' $1 >/dev/null 2>&1 | |
88 | status=$? | |
89 | case $status in | |
90 | 0) | |
91 | AC_MSG_RESULT([yes]) | |
92 | $3 | |
93 | ;; | |
94 | 1) | |
95 | AC_MSG_RESULT([no]) | |
96 | $4 | |
97 | ;; | |
98 | *) | |
99 | AC_MSG_ERROR([grep exited with status $status]) | |
100 | ;; | |
101 | esac | |
102 | ]) | |
103 | ||
104 | dnl OVS_DEFINE(NAME) | |
105 | dnl | |
106 | dnl Defines NAME to 1 in kcompat.h. | |
107 | AC_DEFUN([OVS_DEFINE], [ | |
108 | echo '#define $1 1' >> datapath/linux-2.6/kcompat.h.new | |
109 | ]) | |
110 | ||
111 | AC_DEFUN([OVS_CHECK_VETH], [ | |
112 | AC_MSG_CHECKING([whether to build veth module]) | |
113 | if test "$sublevel" = 18; then | |
114 | AC_MSG_RESULT([yes]) | |
115 | AC_SUBST([BUILD_VETH], 1) | |
116 | else | |
117 | AC_MSG_RESULT([no]) | |
118 | fi | |
119 | ]) | |
120 | ||
c3e3d2a1 JG |
121 | AC_DEFUN([OVS_CHECK_GRE], [ |
122 | AC_MSG_CHECKING([whether to build gre module]) | |
123 | if test "$sublevel" -ge 18; then | |
124 | AC_MSG_RESULT([yes]) | |
125 | AC_SUBST([BUILD_GRE], 1) | |
126 | else | |
127 | AC_MSG_RESULT([no]) | |
128 | fi | |
129 | ]) | |
130 | ||
064af421 BP |
131 | AC_DEFUN([OVS_CHECK_LOG2_H], [ |
132 | AC_MSG_CHECKING([for $KSRC26/include/linux/log2.h]) | |
133 | if test -e $KSRC26/include/linux/log2.h; then | |
134 | AC_MSG_RESULT([yes]) | |
135 | OVS_DEFINE([HAVE_LOG2_H]) | |
136 | else | |
137 | AC_MSG_RESULT([no]) | |
138 | fi | |
139 | ]) | |
140 | ||
141 | dnl OVS_CHECK_LINUX26_COMPAT | |
142 | dnl | |
143 | dnl Runs various Autoconf checks on the Linux 2.6 kernel source in | |
7c9e113b | 144 | dnl the directory in $KBUILD26. |
064af421 BP |
145 | AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [ |
146 | rm -f datapath/linux-2.6/kcompat.h.new | |
147 | mkdir -p datapath/linux-2.6 | |
148 | : > datapath/linux-2.6/kcompat.h.new | |
8f3a29be JP |
149 | OVS_GREP_IFELSE([$KSRC26/include/linux/types.h], [bool], |
150 | [OVS_DEFINE([HAVE_BOOL_TYPE])]) | |
064af421 BP |
151 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_transport_header], |
152 | [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])]) | |
153 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [raw], | |
154 | [OVS_DEFINE([HAVE_MAC_RAW])]) | |
155 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], | |
156 | [skb_copy_from_linear_data_offset], | |
157 | [OVS_DEFINE([HAVE_SKB_COPY_FROM_LINEAR_DATA_OFFSET])]) | |
158 | OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [NLA_NUL_STRING], | |
159 | [OVS_DEFINE([HAVE_NLA_NUL_STRING])]) | |
160 | OVS_GREP_IFELSE([$KSRC26/include/linux/err.h], [ERR_CAST], | |
161 | [OVS_DEFINE([HAVE_ERR_CAST])]) | |
aed94495 BP |
162 | OVS_GREP_IFELSE([$KSRC26/include/net/checksum.h], [csum_unfold], |
163 | [OVS_DEFINE([HAVE_CSUM_UNFOLD])]) | |
164 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_cow], | |
165 | [OVS_DEFINE([HAVE_SKB_COW])]) | |
8f3a29be JP |
166 | OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [nla_get_be16], |
167 | [OVS_DEFINE([HAVE_NLA_GET_BE16])]) | |
168 | OVS_GREP_IFELSE([$KSRC26/include/linux/in.h], [ipv4_is_multicast], | |
169 | [OVS_DEFINE([HAVE_IPV4_IS_MULTICAST])]) | |
6a33828d BP |
170 | # Check for the proto_data_valid member in struct sk_buff. The [^@] |
171 | # is necessary because some versions of this header remove the | |
172 | # member but retain the kerneldoc comment that describes it (which | |
173 | # starts with @). The brackets must be doubled because of m4 | |
174 | # quoting rules. | |
175 | OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [[[^@]]proto_data_valid], | |
176 | [OVS_DEFINE([HAVE_PROTO_DATA_VALID])]) | |
064af421 BP |
177 | OVS_CHECK_LOG2_H |
178 | OVS_CHECK_VETH | |
c3e3d2a1 | 179 | OVS_CHECK_GRE |
064af421 BP |
180 | if cmp -s datapath/linux-2.6/kcompat.h.new \ |
181 | datapath/linux-2.6/kcompat.h >/dev/null 2>&1; then | |
182 | rm datapath/linux-2.6/kcompat.h.new | |
183 | else | |
184 | mv datapath/linux-2.6/kcompat.h.new datapath/linux-2.6/kcompat.h | |
185 | fi | |
186 | ]) | |
187 | ||
188 | dnl Checks for net/if_packet.h. | |
189 | AC_DEFUN([OVS_CHECK_IF_PACKET], | |
190 | [AC_CHECK_HEADER([net/if_packet.h], | |
191 | [HAVE_IF_PACKET=yes], | |
192 | [HAVE_IF_PACKET=no]) | |
193 | AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes]) | |
194 | if test "$HAVE_IF_PACKET" = yes; then | |
195 | AC_DEFINE([HAVE_IF_PACKET], [1], | |
196 | [Define to 1 if net/if_packet.h is available.]) | |
197 | fi]) | |
198 | ||
e50097d2 BP |
199 | dnl Checks for buggy strtok_r. |
200 | dnl | |
201 | dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling | |
202 | dnl with optimization that can cause segfaults: | |
203 | dnl | |
204 | dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614. | |
205 | AC_DEFUN([OVS_CHECK_STRTOK_R], | |
206 | [AC_CACHE_CHECK( | |
207 | [whether strtok_r macro segfaults on some inputs], | |
208 | [ovs_cv_strtok_r_bug], | |
209 | [AC_RUN_IFELSE( | |
210 | [AC_LANG_PROGRAM([#include <stdio.h> | |
211 | #include <string.h> | |
212 | ], | |
213 | [[char string[] = ":::"; | |
214 | char *save_ptr = (char *) 0xc0ffee; | |
215 | char *token1, *token2; | |
216 | token1 = strtok_r(string, ":", &save_ptr); | |
217 | token2 = strtok_r(NULL, ":", &save_ptr); | |
5819a7cd | 218 | freopen ("/dev/null", "w", stdout); |
e50097d2 BP |
219 | printf ("%s %s\n", token1, token2); |
220 | return 0; | |
221 | ]])], | |
222 | [ovs_cv_strtok_r_bug=no], | |
223 | [ovs_cv_strtok_r_bug=yes], | |
224 | [ovs_cv_strtok_r_bug=yes])]) | |
225 | if test $ovs_cv_strtok_r_bug = yes; then | |
226 | AC_DEFINE([HAVE_STRTOK_R_BUG], [1], | |
227 | [Define if strtok_r macro segfaults on some inputs]) | |
228 | fi | |
229 | ]) | |
230 | ||
064af421 BP |
231 | dnl ---------------------------------------------------------------------- |
232 | dnl These macros are from GNU PSPP, with the following original license: | |
233 | dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. | |
234 | dnl This file is free software; the Free Software Foundation | |
235 | dnl gives unlimited permission to copy and/or distribute it, | |
236 | dnl with or without modifications, as long as this notice is preserved. | |
237 | ||
238 | dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED]) | |
239 | dnl Check whether the given C compiler OPTION is accepted. | |
240 | dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED. | |
241 | AC_DEFUN([OVS_CHECK_CC_OPTION], | |
242 | [ | |
243 | m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-], [_])])dnl | |
244 | AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name], | |
245 | [ovs_save_CFLAGS="$CFLAGS" | |
246 | CFLAGS="$CFLAGS $1" | |
247 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no]) | |
248 | CFLAGS="$ovs_save_CFLAGS"]) | |
249 | if test $ovs_cv_name = yes; then | |
83f6c050 | 250 | m4_if([$2], [], [:], [$2]) |
064af421 BP |
251 | else |
252 | m4_if([$3], [], [:], [$3]) | |
253 | fi | |
254 | ]) | |
255 | ||
256 | dnl OVS_ENABLE_OPTION([OPTION]) | |
257 | dnl Check whether the given C compiler OPTION is accepted. | |
d161c099 | 258 | dnl If so, add it to WARNING_FLAGS. |
064af421 BP |
259 | dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement]) |
260 | AC_DEFUN([OVS_ENABLE_OPTION], | |
d161c099 BP |
261 | [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"]) |
262 | AC_SUBST([WARNING_FLAGS])]) | |
c72e245a BP |
263 | |
264 | dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL]) | |
265 | dnl Check whether the given C compiler OPTION is accepted. | |
266 | dnl If so, enable the given Automake CONDITIONAL. | |
267 | ||
268 | dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED]) | |
269 | AC_DEFUN([OVS_CONDITIONAL_CC_OPTION], | |
270 | [OVS_CHECK_CC_OPTION( | |
271 | [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no]) | |
272 | AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])]) | |
064af421 | 273 | dnl ---------------------------------------------------------------------- |