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064af421 BP |
1 | # -*- autoconf -*- |
2 | ||
d30e714c | 3 | # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 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 |
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 | ||
e3438006 | 28 | dnl OVS_CHECK_LINUX |
064af421 BP |
29 | dnl |
30 | dnl Configure linux kernel source tree | |
e3438006 | 31 | AC_DEFUN([OVS_CHECK_LINUX], [ |
8a2d6596 BP |
32 | AC_ARG_WITH([linux], |
33 | [AC_HELP_STRING([--with-linux=/path/to/linux], | |
34 | [Specify the Linux kernel build directory])]) | |
35 | AC_ARG_WITH([linux-source], | |
36 | [AC_HELP_STRING([--with-linux-source=/path/to/linux-source], | |
37 | [Specify the Linux kernel source directory | |
f5fb5de6 | 38 | (usually figured out automatically from build |
8a2d6596 BP |
39 | directory)])]) |
40 | ||
41 | # Deprecated equivalents to --with-linux, --with-linux-source. | |
42 | AC_ARG_WITH([l26]) | |
43 | AC_ARG_WITH([l26-source]) | |
44 | ||
45 | if test X"$with_linux" != X; then | |
46 | KBUILD=$with_linux | |
47 | elif test X"$with_l26" != X; then | |
48 | KBUILD=$with_l26 | |
49 | AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead]) | |
50 | else | |
51 | KBUILD= | |
52 | fi | |
53 | ||
54 | if test X"$KBUILD" != X; then | |
55 | if test X"$with_linux_source" != X; then | |
56 | KSRC=$with_linux_source | |
57 | elif test X"$with_l26_source" != X; then | |
58 | KSRC=$with_l26_source | |
59 | AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead]) | |
0a89c170 BP |
60 | else |
61 | KSRC= | |
8a2d6596 BP |
62 | fi |
63 | elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then | |
64 | AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory]) | |
65 | fi | |
66 | ||
e3438006 BP |
67 | if test -n "$KBUILD"; then |
68 | KBUILD=`eval echo "$KBUILD"` | |
69 | case $KBUILD in | |
0b6d72fc | 70 | /*) ;; |
e3438006 | 71 | *) KBUILD=`pwd`/$KBUILD ;; |
0b6d72fc | 72 | esac |
064af421 | 73 | |
7c9e113b BP |
74 | # The build directory is what the user provided. |
75 | # Make sure that it exists. | |
8a2d6596 | 76 | AC_MSG_CHECKING([for Linux build directory]) |
e3438006 BP |
77 | if test -d "$KBUILD"; then |
78 | AC_MSG_RESULT([$KBUILD]) | |
79 | AC_SUBST(KBUILD) | |
064af421 BP |
80 | else |
81 | AC_MSG_RESULT([no]) | |
e3438006 | 82 | AC_ERROR([source dir $KBUILD doesn't exist]) |
064af421 BP |
83 | fi |
84 | ||
7c9e113b | 85 | # Debian breaks kernel headers into "source" header and "build" headers. |
e3438006 | 86 | # We want the source headers, but $KBUILD gives us the "build" headers. |
7c9e113b | 87 | # Use heuristics to find the source headers. |
8a2d6596 | 88 | AC_MSG_CHECKING([for Linux source directory]) |
e3438006 BP |
89 | if test -n "$KSRC"; then |
90 | KSRC=`eval echo "$KSRC"` | |
91 | case $KSRC in | |
f5fb5de6 | 92 | /*) ;; |
e3438006 | 93 | *) KSRC=`pwd`/$KSRC ;; |
b57f675c | 94 | esac |
e3438006 | 95 | if test ! -e $KSRC/include/linux/kernel.h; then |
53319f95 | 96 | AC_MSG_ERROR([$KSRC is not a kernel source directory]) |
f5fb5de6 BP |
97 | fi |
98 | else | |
e3438006 BP |
99 | KSRC=$KBUILD |
100 | if test ! -e $KSRC/include/linux/kernel.h; then | |
fe0731b1 BP |
101 | # Debian kernel build Makefiles tend to include a line of the form: |
102 | # MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486 | |
103 | # First try to extract the source directory from this line. | |
104 | KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile` | |
105 | if test ! -e "$KSRC"/include/linux/kernel.h; then | |
106 | # Didn't work. Fall back to name-based heuristics that used to work. | |
107 | case `echo "$KBUILD" | sed 's,/*$,,'` in # ( | |
108 | */build) | |
109 | KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'` | |
110 | ;; # ( | |
111 | *) | |
112 | KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'` | |
113 | ;; | |
114 | esac | |
115 | fi | |
f5fb5de6 | 116 | fi |
fe0731b1 | 117 | if test ! -e "$KSRC"/include/linux/kernel.h; then |
8a2d6596 | 118 | AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)]) |
7c9e113b BP |
119 | fi |
120 | fi | |
e3438006 | 121 | AC_MSG_RESULT([$KSRC]) |
7c9e113b BP |
122 | |
123 | AC_MSG_CHECKING([for kernel version]) | |
71fe9970 | 124 | version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"` |
e3438006 BP |
125 | patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"` |
126 | sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"` | |
71fe9970 | 127 | if test X"$version" = X || test X"$patchlevel" = X; then |
7c9e113b | 128 | AC_ERROR([cannot determine kernel version]) |
71fe9970 BP |
129 | elif test X"$sublevel" = X; then |
130 | kversion=$version.$patchlevel | |
131 | else | |
132 | kversion=$version.$patchlevel.$sublevel | |
7c9e113b | 133 | fi |
71fe9970 BP |
134 | AC_MSG_RESULT([$kversion]) |
135 | ||
136 | if test "$version" -ge 3; then | |
54af97ad | 137 | if test "$version" = 3 && test "$patchlevel" -le 11; then |
d76aabea PS |
138 | : # Linux 3.x |
139 | else | |
54af97ad | 140 | AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 3.11.x is not supported]) |
d76aabea | 141 | fi |
71fe9970 | 142 | else |
d76aabea PS |
143 | if test "$version" -le 1 || test "$patchlevel" -le 5 || test "$sublevel" -le 31; then |
144 | AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 2.6.32 or later is required]) | |
7c9e113b | 145 | else |
d76aabea | 146 | : # Linux 2.6.x |
7c9e113b | 147 | fi |
064af421 | 148 | fi |
2520f452 IY |
149 | if (test ! -e "$KBUILD"/include/linux/version.h && \ |
150 | test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \ | |
e3438006 BP |
151 | (test ! -e "$KBUILD"/include/linux/autoconf.h && \ |
152 | test ! -e "$KBUILD"/include/generated/autoconf.h); then | |
153 | AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured]) | |
064af421 | 154 | fi |
e3438006 | 155 | OVS_CHECK_LINUX_COMPAT |
064af421 | 156 | fi |
e3438006 | 157 | AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD") |
064af421 BP |
158 | ]) |
159 | ||
8828e5c7 | 160 | dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH]) |
064af421 BP |
161 | dnl |
162 | dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH. | |
8828e5c7 BP |
163 | dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with |
164 | dnl <REGEX> translated to uppercase. | |
064af421 BP |
165 | AC_DEFUN([OVS_GREP_IFELSE], [ |
166 | AC_MSG_CHECKING([whether $2 matches in $1]) | |
7507ec48 JG |
167 | if test -f $1; then |
168 | grep '$2' $1 >/dev/null 2>&1 | |
169 | status=$? | |
170 | case $status in | |
171 | 0) | |
172 | AC_MSG_RESULT([yes]) | |
8828e5c7 | 173 | m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3]) |
7507ec48 JG |
174 | ;; |
175 | 1) | |
176 | AC_MSG_RESULT([no]) | |
177 | $4 | |
178 | ;; | |
179 | *) | |
180 | AC_MSG_ERROR([grep exited with status $status]) | |
181 | ;; | |
182 | esac | |
183 | else | |
184 | AC_MSG_RESULT([file not found]) | |
185 | $4 | |
186 | fi | |
064af421 BP |
187 | ]) |
188 | ||
189 | dnl OVS_DEFINE(NAME) | |
190 | dnl | |
191 | dnl Defines NAME to 1 in kcompat.h. | |
192 | AC_DEFUN([OVS_DEFINE], [ | |
22bcc0e7 | 193 | echo '#define $1 1' >> datapath/linux/kcompat.h.new |
064af421 BP |
194 | ]) |
195 | ||
064af421 | 196 | AC_DEFUN([OVS_CHECK_LOG2_H], [ |
e3438006 BP |
197 | AC_MSG_CHECKING([for $KSRC/include/linux/log2.h]) |
198 | if test -e $KSRC/include/linux/log2.h; then | |
064af421 BP |
199 | AC_MSG_RESULT([yes]) |
200 | OVS_DEFINE([HAVE_LOG2_H]) | |
201 | else | |
202 | AC_MSG_RESULT([no]) | |
203 | fi | |
204 | ]) | |
205 | ||
e3438006 | 206 | dnl OVS_CHECK_LINUX_COMPAT |
064af421 BP |
207 | dnl |
208 | dnl Runs various Autoconf checks on the Linux 2.6 kernel source in | |
e3438006 BP |
209 | dnl the directory in $KBUILD. |
210 | AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [ | |
22bcc0e7 JG |
211 | rm -f datapath/linux/kcompat.h.new |
212 | mkdir -p datapath/linux | |
213 | : > datapath/linux/kcompat.h.new | |
4aa13c0c | 214 | |
e3438006 | 215 | OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,], |
25fb3596 JG |
216 | [OVS_DEFINE([HAVE_CSUM_COPY_DBG])]) |
217 | ||
e3438006 | 218 | OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST]) |
4aa13c0c | 219 | |
d923a695 JG |
220 | OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random]) |
221 | ||
222 | OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto]) | |
223 | ||
e3438006 | 224 | OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast]) |
4aa13c0c | 225 | |
e3438006 BP |
226 | OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro]) |
227 | OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats]) | |
228 | OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu]) | |
42d5dd95 TG |
229 | OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment]) |
230 | OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol]) | |
d1890de5 | 231 | OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t]) |
4aa13c0c | 232 | |
e3438006 BP |
233 | OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [], |
234 | [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], | |
cf6cb3a2 | 235 | [rcu_read_lock_held])]) |
8fa52250 | 236 | OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held]) |
cf6cb3a2 | 237 | |
6a33828d BP |
238 | # Check for the proto_data_valid member in struct sk_buff. The [^@] |
239 | # is necessary because some versions of this header remove the | |
240 | # member but retain the kerneldoc comment that describes it (which | |
241 | # starts with @). The brackets must be doubled because of m4 | |
242 | # quoting rules. | |
e3438006 | 243 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid], |
6a33828d | 244 | [OVS_DEFINE([HAVE_PROTO_DATA_VALID])]) |
60c4904f | 245 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash]) |
e3438006 | 246 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(], |
85444c3f | 247 | [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])]) |
e3438006 | 248 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], |
8828e5c7 | 249 | [skb_copy_from_linear_data_offset]) |
b9c15df9 PS |
250 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], |
251 | [skb_reset_tail_pointer]) | |
e3438006 BP |
252 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head]) |
253 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header], | |
4aa13c0c | 254 | [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])]) |
e3438006 | 255 | OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr], |
d31f1109 | 256 | [OVS_DEFINE([HAVE_ICMP6_HDR])]) |
e3438006 | 257 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro], |
4aa13c0c | 258 | [OVS_DEFINE([HAVE_SKB_WARN_LRO])]) |
e3438006 | 259 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb]) |
6c4ea27c | 260 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page]) |
da4bbeb7 | 261 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list]) |
0aa6fda7 | 262 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc]) |
d923a695 | 263 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len]) |
dc0d542d | 264 | OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone]) |
4aa13c0c | 265 | |
e3438006 | 266 | OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool], |
4aa13c0c | 267 | [OVS_DEFINE([HAVE_BOOL_TYPE])]) |
e3438006 | 268 | OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum], |
e215ebca | 269 | [OVS_DEFINE([HAVE_CSUM_TYPES])]) |
8dbe1f9f PS |
270 | OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum], |
271 | [OVS_DEFINE([HAVE_CSUM_TYPES])]) | |
4aa13c0c | 272 | |
e3438006 BP |
273 | OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4]) |
274 | OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold]) | |
4aa13c0c | 275 | |
14002a59 | 276 | OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops]) |
cc1d0dea | 277 | OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register]) |
e3438006 | 278 | OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16]) |
42d5dd95 TG |
279 | OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16]) |
280 | OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32]) | |
281 | OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64]) | |
e3438006 | 282 | OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested]) |
4aa13c0c | 283 | |
c4e976db JG |
284 | OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum]) |
285 | ||
e3438006 | 286 | OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD], |
431488e6 BP |
287 | [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])]) |
288 | ||
42d5dd95 TG |
289 | OVS_GREP_IFELSE([$KSRC/include/linux/percpu.h], [this_cpu_ptr]) |
290 | ||
f285d3e7 TG |
291 | OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook], |
292 | [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])]) | |
293 | ||
064af421 | 294 | OVS_CHECK_LOG2_H |
4aa13c0c | 295 | |
22bcc0e7 JG |
296 | if cmp -s datapath/linux/kcompat.h.new \ |
297 | datapath/linux/kcompat.h >/dev/null 2>&1; then | |
298 | rm datapath/linux/kcompat.h.new | |
064af421 | 299 | else |
22bcc0e7 | 300 | mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h |
064af421 BP |
301 | fi |
302 | ]) | |
303 | ||
304 | dnl Checks for net/if_packet.h. | |
305 | AC_DEFUN([OVS_CHECK_IF_PACKET], | |
306 | [AC_CHECK_HEADER([net/if_packet.h], | |
307 | [HAVE_IF_PACKET=yes], | |
308 | [HAVE_IF_PACKET=no]) | |
309 | AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes]) | |
310 | if test "$HAVE_IF_PACKET" = yes; then | |
311 | AC_DEFINE([HAVE_IF_PACKET], [1], | |
312 | [Define to 1 if net/if_packet.h is available.]) | |
313 | fi]) | |
314 | ||
f6eb6b20 | 315 | dnl Checks for net/if_dl.h. |
d30e714c | 316 | dnl |
d23fa2ed YT |
317 | dnl (We use this as a proxy for checking whether we're building on FreeBSD |
318 | dnl or NetBSD.) | |
9360d9b7 EM |
319 | AC_DEFUN([OVS_CHECK_IF_DL], |
320 | [AC_CHECK_HEADER([net/if_dl.h], | |
321 | [HAVE_IF_DL=yes], | |
322 | [HAVE_IF_DL=no]) | |
323 | AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes]) | |
324 | if test "$HAVE_IF_DL" = yes; then | |
325 | AC_DEFINE([HAVE_IF_DL], [1], | |
326 | [Define to 1 if net/if_dl.h is available.]) | |
d30e714c | 327 | |
d23fa2ed | 328 | # On these platforms we use libpcap to access network devices. |
d30e714c | 329 | AC_SEARCH_LIBS([pcap_open_live], [pcap]) |
9360d9b7 EM |
330 | fi]) |
331 | ||
e50097d2 BP |
332 | dnl Checks for buggy strtok_r. |
333 | dnl | |
334 | dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling | |
335 | dnl with optimization that can cause segfaults: | |
336 | dnl | |
337 | dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614. | |
338 | AC_DEFUN([OVS_CHECK_STRTOK_R], | |
339 | [AC_CACHE_CHECK( | |
340 | [whether strtok_r macro segfaults on some inputs], | |
341 | [ovs_cv_strtok_r_bug], | |
342 | [AC_RUN_IFELSE( | |
343 | [AC_LANG_PROGRAM([#include <stdio.h> | |
344 | #include <string.h> | |
345 | ], | |
346 | [[char string[] = ":::"; | |
347 | char *save_ptr = (char *) 0xc0ffee; | |
348 | char *token1, *token2; | |
349 | token1 = strtok_r(string, ":", &save_ptr); | |
350 | token2 = strtok_r(NULL, ":", &save_ptr); | |
5819a7cd | 351 | freopen ("/dev/null", "w", stdout); |
e50097d2 BP |
352 | printf ("%s %s\n", token1, token2); |
353 | return 0; | |
354 | ]])], | |
355 | [ovs_cv_strtok_r_bug=no], | |
356 | [ovs_cv_strtok_r_bug=yes], | |
357 | [ovs_cv_strtok_r_bug=yes])]) | |
358 | if test $ovs_cv_strtok_r_bug = yes; then | |
359 | AC_DEFINE([HAVE_STRTOK_R_BUG], [1], | |
360 | [Define if strtok_r macro segfaults on some inputs]) | |
361 | fi | |
362 | ]) | |
363 | ||
064af421 BP |
364 | dnl ---------------------------------------------------------------------- |
365 | dnl These macros are from GNU PSPP, with the following original license: | |
366 | dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc. | |
367 | dnl This file is free software; the Free Software Foundation | |
368 | dnl gives unlimited permission to copy and/or distribute it, | |
369 | dnl with or without modifications, as long as this notice is preserved. | |
370 | ||
50194820 | 371 | AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl |
064af421 BP |
372 | m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-], [_])])dnl |
373 | AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name], | |
374 | [ovs_save_CFLAGS="$CFLAGS" | |
50194820 BP |
375 | dnl Include -Werror in the compiler options, because without -Werror |
376 | dnl clang's GCC-compatible compiler driver does not return a failure | |
377 | dnl exit status even though it complains about options it does not | |
378 | dnl understand. | |
379 | CFLAGS="$CFLAGS $WERROR $1" | |
064af421 BP |
380 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no]) |
381 | CFLAGS="$ovs_save_CFLAGS"]) | |
382 | if test $ovs_cv_name = yes; then | |
83f6c050 | 383 | m4_if([$2], [], [:], [$2]) |
064af421 BP |
384 | else |
385 | m4_if([$3], [], [:], [$3]) | |
386 | fi | |
387 | ]) | |
388 | ||
50194820 BP |
389 | dnl OVS_CHECK_WERROR |
390 | dnl | |
391 | dnl Check whether the C compiler accepts -Werror. | |
392 | dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string. | |
393 | AC_DEFUN([OVS_CHECK_WERROR], | |
394 | [WERROR= | |
395 | _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])]) | |
396 | ||
397 | dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED]) | |
398 | dnl Check whether the given C compiler OPTION is accepted. | |
399 | dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED. | |
400 | AC_DEFUN([OVS_CHECK_CC_OPTION], | |
401 | [AC_REQUIRE([OVS_CHECK_WERROR]) | |
402 | _OVS_CHECK_CC_OPTION([$1], [$2], [$3])]) | |
403 | ||
064af421 BP |
404 | dnl OVS_ENABLE_OPTION([OPTION]) |
405 | dnl Check whether the given C compiler OPTION is accepted. | |
d161c099 | 406 | dnl If so, add it to WARNING_FLAGS. |
064af421 BP |
407 | dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement]) |
408 | AC_DEFUN([OVS_ENABLE_OPTION], | |
d161c099 BP |
409 | [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"]) |
410 | AC_SUBST([WARNING_FLAGS])]) | |
c72e245a BP |
411 | |
412 | dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL]) | |
413 | dnl Check whether the given C compiler OPTION is accepted. | |
414 | dnl If so, enable the given Automake CONDITIONAL. | |
415 | ||
416 | dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED]) | |
417 | AC_DEFUN([OVS_CONDITIONAL_CC_OPTION], | |
418 | [OVS_CHECK_CC_OPTION( | |
419 | [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no]) | |
420 | AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])]) | |
064af421 | 421 | dnl ---------------------------------------------------------------------- |
ed2d4f6a BP |
422 | |
423 | dnl Check for too-old XenServer. | |
424 | AC_DEFUN([OVS_CHECK_XENSERVER_VERSION], | |
425 | [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion], | |
426 | [if test -e /etc/redhat-release; then | |
427 | ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release` | |
428 | fi | |
429 | if test -z "$ovs_cv_xsversion"; then | |
430 | ovs_cv_xsversion=none | |
431 | fi]) | |
432 | case $ovs_cv_xsversion in | |
433 | none) | |
434 | ;; | |
435 | ||
436 | [[1-9]][[0-9]]* | dnl XenServer 10 or later | |
437 | [[6-9]]* | dnl XenServer 6 or later | |
438 | 5.[[7-9]]* | dnl XenServer 5.7 or later | |
439 | 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later | |
440 | 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later | |
441 | 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later | |
442 | ;; | |
443 | ||
444 | *) | |
445 | 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.)]) | |
446 | ;; | |
447 | esac]) | |
29d935d6 BP |
448 | |
449 | dnl OVS_MAKE_HAS_IF([if-true], [if-false]) | |
450 | dnl | |
451 | dnl Checks whether make has the GNU make $(if condition,then,else) extension. | |
452 | dnl Runs 'if-true' if so, 'if-false' otherwise. | |
372d58a4 | 453 | AC_DEFUN([OVS_CHECK_MAKE_IF], |
29d935d6 BP |
454 | [AC_CACHE_CHECK( |
455 | [whether ${MAKE-make} has GNU make \$(if) extension], | |
456 | [ovs_cv_gnu_make_if], | |
457 | [cat <<'EOF' > conftest.mk | |
458 | conftest.out: | |
459 | echo $(if x,y,z) > conftest.out | |
460 | .PHONY: all | |
461 | EOF | |
462 | rm -f conftest.out | |
463 | AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1 | |
464 | ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1 | |
465 | AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1 | |
466 | cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1 | |
467 | result=`cat conftest.out` | |
468 | rm -f conftest.mk conftest.out | |
469 | if test "X$result" = "Xy"; then | |
470 | ovs_cv_gnu_make_if=yes | |
471 | else | |
472 | ovs_cv_gnu_make_if=no | |
372d58a4 | 473 | fi])]) |
29d935d6 | 474 | |
b4e1bf8b BP |
475 | dnl OVS_CHECK_GNU_MAKE |
476 | dnl | |
477 | dnl Checks whether make is GNU make (because Linux kernel Makefiles | |
478 | dnl only work with GNU make). | |
479 | AC_DEFUN([OVS_CHECK_GNU_MAKE], | |
480 | [AC_CACHE_CHECK( | |
481 | [whether ${MAKE-make} is GNU make], | |
482 | [ovs_cv_gnu_make], | |
483 | [rm -f conftest.out | |
484 | AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1 | |
485 | ${MAKE-make} --version >conftest.out 2>&1 | |
486 | cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1 | |
487 | result=`cat conftest.out` | |
488 | rm -f conftest.mk conftest.out | |
489 | ||
490 | case $result in # ( | |
491 | GNU*) ovs_cv_gnu_make=yes ;; # ( | |
492 | *) ovs_cv_gnu_make=no ;; | |
493 | esac]) | |
494 | AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])]) | |
495 | ||
643c0c34 BP |
496 | dnl OVS_CHECK_SPARSE_TARGET |
497 | dnl | |
498 | dnl The "cgcc" script from "sparse" isn't very good at detecting the | |
499 | dnl target for which the code is being built. This helps it out. | |
500 | AC_DEFUN([OVS_CHECK_SPARSE_TARGET], | |
501 | [AC_CACHE_CHECK( | |
502 | [target hint for cgcc], | |
503 | [ac_cv_sparse_target], | |
504 | [AS_CASE([`$CC -dumpmachine 2>/dev/null`], | |
505 | [i?86-* | athlon-*], [ac_cv_sparse_target=x86], | |
506 | [x86_64-*], [ac_cv_sparse_target=x86_64], | |
507 | [ac_cv_sparse_target=other])]) | |
508 | AS_CASE([$ac_cv_sparse_target], | |
509 | [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86], | |
510 | [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64], | |
511 | [SPARSEFLAGS= CGCCFLAGS=]) | |
512 | AC_SUBST([SPARSEFLAGS]) | |
513 | AC_SUBST([CGCCFLAGS])]) | |
514 | ||
32e96ab7 AZ |
515 | dnl OVS_SPARSE_EXTRA_INCLUDES |
516 | dnl | |
517 | dnl The cgcc script from "sparse" does not search gcc's default | |
518 | dnl search path. Get the default search path from GCC and pass | |
519 | dnl them to sparse. | |
520 | AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES], | |
521 | AC_SUBST([SPARSE_EXTRA_INCLUDES], | |
522 | [`$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 ' ' `] )) | |
523 | ||
29d935d6 BP |
524 | dnl OVS_ENABLE_SPARSE |
525 | AC_DEFUN([OVS_ENABLE_SPARSE], | |
643c0c34 | 526 | [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET]) |
372d58a4 | 527 | AC_REQUIRE([OVS_CHECK_MAKE_IF]) |
32e96ab7 | 528 | AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES]) |
372d58a4 BP |
529 | : ${SPARSE=sparse} |
530 | AC_SUBST([SPARSE]) | |
531 | AC_CONFIG_COMMANDS_PRE( | |
532 | [if test $ovs_cv_gnu_make_if = yes; then | |
38b7a52b | 533 | CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')' |
372d58a4 | 534 | fi])]) |
8a8cd0ac BP |
535 | |
536 | dnl OVS_PTHREAD_SET_NAME | |
537 | dnl | |
538 | dnl This checks for three known variants of pthreads functions for setting | |
539 | dnl the name of the current thread: | |
540 | dnl | |
541 | dnl glibc: int pthread_setname_np(pthread_t, const char *name); | |
542 | dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg); | |
543 | dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name); | |
544 | dnl | |
545 | dnl For glibc and FreeBSD, the arguments are just a thread and its name. For | |
546 | dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to | |
547 | dnl provide to it. | |
548 | dnl | |
549 | dnl This macro defines: | |
550 | dnl | |
551 | dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP | |
552 | dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP | |
553 | dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP | |
554 | AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME], | |
555 | [AC_CHECK_FUNCS([pthread_set_name_np]) | |
556 | if test $ac_cv_func_pthread_set_name_np != yes; then | |
557 | AC_CACHE_CHECK( | |
558 | [for pthread_setname_np() variant], | |
559 | [ovs_cv_pthread_setname_np], | |
560 | [AC_LINK_IFELSE( | |
561 | [AC_LANG_PROGRAM([#include <pthread.h> | |
562 | ], [pthread_setname_np(pthread_self(), "name");])], | |
563 | [ovs_cv_pthread_setname_np=glibc], | |
564 | [AC_LINK_IFELSE( | |
565 | [AC_LANG_PROGRAM([#include <pthread.h> | |
566 | ], [pthread_setname_np(pthread_self(), "%s", "name");])], | |
567 | [ovs_cv_pthread_setname_np=netbsd], | |
568 | [ovs_cv_pthread_setname_np=none])])]) | |
569 | case $ovs_cv_pthread_setname_np in # ( | |
570 | glibc) | |
571 | AC_DEFINE( | |
572 | [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1], | |
573 | [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).]) | |
574 | ;; # ( | |
575 | netbsd) | |
576 | AC_DEFINE( | |
577 | [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1], | |
578 | [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).]) | |
579 | ;; | |
580 | esac | |
581 | fi]) |