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datapath: Support for Linux kernel 3.10
[mirror_ovs.git] / acinclude.m4
CommitLineData
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		 17dnl OVS_ENABLE_WERROR
18AC_DEFUN([OVS_ENABLE_WERROR],
19 [AC_ARG_ENABLE(
20 [Werror],
21 [AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
22 [], [enable_Werror=no])
23 AC_CONFIG_COMMANDS_PRE(
24 [if test "X$enable_Werror" = Xyes; then
25 CFLAGS="$CFLAGS -Werror"
26 fi])])
27
e3438006 28dnl OVS_CHECK_LINUX
064af421
BP		 29dnl
30dnl Configure linux kernel source tree
e3438006 31AC_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 "$version" -ge 3; then
137 : # Linux 3.x
138 elif test "$version" = 2 && test "$patchlevel" -ge 6; then
139 : # Linux 2.6.x
140 else
e3438006 141 if test "$KBUILD" = "$KSRC"; then
71fe9970 142 AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 2.6 or later is required])
7c9e113b 143 else
71fe9970 144 AC_ERROR([Linux kernel in build tree $KBUILD (source tree $KSRC) is version $kversion, but version 2.6 or later is required])
7c9e113b 145 fi
064af421 146 fi
2520f452
IY		 147 if (test ! -e "$KBUILD"/include/linux/version.h && \
148 test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
e3438006
BP		 149 (test ! -e "$KBUILD"/include/linux/autoconf.h && \
150 test ! -e "$KBUILD"/include/generated/autoconf.h); then
151 AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
064af421 152 fi
e3438006 153 OVS_CHECK_LINUX_COMPAT
064af421 154 fi
e3438006 155 AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
064af421
BP		 156])
157
8828e5c7 158dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 159dnl
160dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 161dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
162dnl <REGEX> translated to uppercase.
064af421
BP		 163AC_DEFUN([OVS_GREP_IFELSE], [
164 AC_MSG_CHECKING([whether $2 matches in $1])
7507ec48
JG		 165 if test -f $1; then
166 grep '$2' $1 >/dev/null 2>&1
167 status=$?
168 case $status in
169 0)
170 AC_MSG_RESULT([yes])
8828e5c7 171 m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
7507ec48
JG		 172 ;;
173 1)
174 AC_MSG_RESULT([no])
175 $4
176 ;;
177 *)
178 AC_MSG_ERROR([grep exited with status $status])
179 ;;
180 esac
181 else
182 AC_MSG_RESULT([file not found])
183 $4
184 fi
064af421
BP		 185])
186
187dnl OVS_DEFINE(NAME)
188dnl
189dnl Defines NAME to 1 in kcompat.h.
190AC_DEFUN([OVS_DEFINE], [
22bcc0e7 191 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 192])
193
064af421 194AC_DEFUN([OVS_CHECK_LOG2_H], [
e3438006
BP		 195 AC_MSG_CHECKING([for $KSRC/include/linux/log2.h])
196 if test -e $KSRC/include/linux/log2.h; then
064af421
BP		 197 AC_MSG_RESULT([yes])
198 OVS_DEFINE([HAVE_LOG2_H])
199 else
200 AC_MSG_RESULT([no])
201 fi
202])
203
e3438006 204dnl OVS_CHECK_LINUX_COMPAT
064af421
BP		 205dnl
206dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
e3438006
BP		 207dnl the directory in $KBUILD.
208AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 209 rm -f datapath/linux/kcompat.h.new
210 mkdir -p datapath/linux
211 : > datapath/linux/kcompat.h.new
4aa13c0c 212
e3438006 213 OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
25fb3596
JG		 214 [OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
215
e3438006 216 OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
4aa13c0c 217
d923a695
JG		 218 OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
219
220 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
221
e3438006 222 OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
4aa13c0c 223
e3438006
BP		 224 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
225 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
226 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
42d5dd95
TG		 227 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
228 OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
4aa13c0c 229
e3438006
BP		 230 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
231 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2
JG		 232 [rcu_read_lock_held])])
233
6a33828d
BP		 234 # Check for the proto_data_valid member in struct sk_buff. The [^@]
235 # is necessary because some versions of this header remove the
236 # member but retain the kerneldoc comment that describes it (which
237 # starts with @). The brackets must be doubled because of m4
238 # quoting rules.
e3438006 239 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 240 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
e3438006 241 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [raw],
4aa13c0c 242 [OVS_DEFINE([HAVE_MAC_RAW])])
e3438006 243 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 244 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 245 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 246 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 247 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
248 [skb_reset_tail_pointer])
e3438006
BP		 249 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
250 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 251 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 252 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 253 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 254 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 255 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 256 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 257 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
d923a695 258 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 259 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
4aa13c0c 260
e3438006
BP		 261 OVS_GREP_IFELSE([$KSRC/include/linux/string.h], [kmemdup], [],
262 [OVS_GREP_IFELSE([$KSRC/include/linux/slab.h], [kmemdup])])
4aa13c0c 263
e3438006 264 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 265 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 266 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 267 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 268 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
269 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 270
e3438006
BP		 271 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
272 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 273
e3438006
BP		 274 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [NLA_NUL_STRING])
275 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 276 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
277 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
278 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
e3438006 279 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
4aa13c0c 280
e3438006 281 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6
BP		 282 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
283
42d5dd95
TG		 284 OVS_GREP_IFELSE([$KSRC/include/linux/percpu.h], [this_cpu_ptr])
285
f285d3e7
TG		 286 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
287 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
288
064af421 289 OVS_CHECK_LOG2_H
4aa13c0c 290
22bcc0e7
JG		 291 if cmp -s datapath/linux/kcompat.h.new \
292 datapath/linux/kcompat.h >/dev/null 2>&1; then
293 rm datapath/linux/kcompat.h.new
064af421 294 else
22bcc0e7 295 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 296 fi
297])
298
299dnl Checks for net/if_packet.h.
300AC_DEFUN([OVS_CHECK_IF_PACKET],
301 [AC_CHECK_HEADER([net/if_packet.h],
302 [HAVE_IF_PACKET=yes],
303 [HAVE_IF_PACKET=no])
304 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
305 if test "$HAVE_IF_PACKET" = yes; then
306 AC_DEFINE([HAVE_IF_PACKET], [1],
307 [Define to 1 if net/if_packet.h is available.])
308 fi])
309
f6eb6b20 310dnl Checks for net/if_dl.h.
d30e714c 311dnl
d23fa2ed
YT		 312dnl (We use this as a proxy for checking whether we're building on FreeBSD
313dnl or NetBSD.)
9360d9b7
EM		 314AC_DEFUN([OVS_CHECK_IF_DL],
315 [AC_CHECK_HEADER([net/if_dl.h],
316 [HAVE_IF_DL=yes],
317 [HAVE_IF_DL=no])
318 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
319 if test "$HAVE_IF_DL" = yes; then
320 AC_DEFINE([HAVE_IF_DL], [1],
321 [Define to 1 if net/if_dl.h is available.])
d30e714c 322
d23fa2ed 323 # On these platforms we use libpcap to access network devices.
d30e714c 324 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 325 fi])
326
e50097d2
BP		 327dnl Checks for buggy strtok_r.
328dnl
329dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
330dnl with optimization that can cause segfaults:
331dnl
332dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
333AC_DEFUN([OVS_CHECK_STRTOK_R],
334 [AC_CACHE_CHECK(
335 [whether strtok_r macro segfaults on some inputs],
336 [ovs_cv_strtok_r_bug],
337 [AC_RUN_IFELSE(
338 [AC_LANG_PROGRAM([#include <stdio.h>
339 #include <string.h>
340 ],
341 [[char string[] = ":::";
342 char *save_ptr = (char *) 0xc0ffee;
343 char *token1, *token2;
344 token1 = strtok_r(string, ":", &save_ptr);
345 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 346 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 347 printf ("%s %s\n", token1, token2);
348 return 0;
349 ]])],
350 [ovs_cv_strtok_r_bug=no],
351 [ovs_cv_strtok_r_bug=yes],
352 [ovs_cv_strtok_r_bug=yes])])
353 if test $ovs_cv_strtok_r_bug = yes; then
354 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
355 [Define if strtok_r macro segfaults on some inputs])
356 fi
357])
358
064af421
BP		 359dnl ----------------------------------------------------------------------
360dnl These macros are from GNU PSPP, with the following original license:
361dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
362dnl This file is free software; the Free Software Foundation
363dnl gives unlimited permission to copy and/or distribute it,
364dnl with or without modifications, as long as this notice is preserved.
365
50194820 366AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
064af421
BP		 367 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-], [_])])dnl
368 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
369 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 370 dnl Include -Werror in the compiler options, because without -Werror
371 dnl clang's GCC-compatible compiler driver does not return a failure
372 dnl exit status even though it complains about options it does not
373 dnl understand.
374 CFLAGS="$CFLAGS $WERROR $1"
064af421
BP		 375 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no])
376 CFLAGS="$ovs_save_CFLAGS"])
377 if test $ovs_cv_name = yes; then
83f6c050 378 m4_if([$2], [], [:], [$2])
064af421
BP		 379 else
380 m4_if([$3], [], [:], [$3])
381 fi
382])
383
50194820
BP		 384dnl OVS_CHECK_WERROR
385dnl
386dnl Check whether the C compiler accepts -Werror.
387dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
388AC_DEFUN([OVS_CHECK_WERROR],
389 [WERROR=
390 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
391
392dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
393dnl Check whether the given C compiler OPTION is accepted.
394dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
395AC_DEFUN([OVS_CHECK_CC_OPTION],
396 [AC_REQUIRE([OVS_CHECK_WERROR])
397 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
398
064af421
BP		 399dnl OVS_ENABLE_OPTION([OPTION])
400dnl Check whether the given C compiler OPTION is accepted.
d161c099 401dnl If so, add it to WARNING_FLAGS.
064af421
BP		 402dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
403AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 404 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
405 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 406
407dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
408dnl Check whether the given C compiler OPTION is accepted.
409dnl If so, enable the given Automake CONDITIONAL.
410
411dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
412AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
413 [OVS_CHECK_CC_OPTION(
414 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
415 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 416dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 417
418dnl Check for too-old XenServer.
419AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
420 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
421 [if test -e /etc/redhat-release; then
422 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
423 fi
424 if test -z "$ovs_cv_xsversion"; then
425 ovs_cv_xsversion=none
426 fi])
427 case $ovs_cv_xsversion in
428 none)
429 ;;
430
431 [[1-9]][[0-9]]* | dnl XenServer 10 or later
432 [[6-9]]* | dnl XenServer 6 or later
433 5.[[7-9]]* | dnl XenServer 5.7 or later
434 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
435 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
436 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
437 ;;
438
439 *)
440 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.)])
441 ;;
442 esac])
29d935d6
BP		 443
444dnl OVS_MAKE_HAS_IF([if-true], [if-false])
445dnl
446dnl Checks whether make has the GNU make $(if condition,then,else) extension.
447dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 448AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 449 [AC_CACHE_CHECK(
450 [whether ${MAKE-make} has GNU make \$(if) extension],
451 [ovs_cv_gnu_make_if],
452 [cat <<'EOF' > conftest.mk
453conftest.out:
454 echo $(if x,y,z) > conftest.out
455.PHONY: all
456EOF
457 rm -f conftest.out
458 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
459 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
460 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
461 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
462 result=`cat conftest.out`
463 rm -f conftest.mk conftest.out
464 if test "X$result" = "Xy"; then
465 ovs_cv_gnu_make_if=yes
466 else
467 ovs_cv_gnu_make_if=no
372d58a4 468 fi])])
29d935d6 469
b4e1bf8b
BP		 470dnl OVS_CHECK_GNU_MAKE
471dnl
472dnl Checks whether make is GNU make (because Linux kernel Makefiles
473dnl only work with GNU make).
474AC_DEFUN([OVS_CHECK_GNU_MAKE],
475 [AC_CACHE_CHECK(
476 [whether ${MAKE-make} is GNU make],
477 [ovs_cv_gnu_make],
478 [rm -f conftest.out
479 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
480 ${MAKE-make} --version >conftest.out 2>&1
481 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
482 result=`cat conftest.out`
483 rm -f conftest.mk conftest.out
484
485 case $result in # (
486 GNU*) ovs_cv_gnu_make=yes ;; # (
487 *) ovs_cv_gnu_make=no ;;
488 esac])
489 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
490
643c0c34
BP		 491dnl OVS_CHECK_SPARSE_TARGET
492dnl
493dnl The "cgcc" script from "sparse" isn't very good at detecting the
494dnl target for which the code is being built. This helps it out.
495AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
496 [AC_CACHE_CHECK(
497 [target hint for cgcc],
498 [ac_cv_sparse_target],
499 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
500 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
501 [x86_64-*], [ac_cv_sparse_target=x86_64],
502 [ac_cv_sparse_target=other])])
503 AS_CASE([$ac_cv_sparse_target],
504 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
505 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
506 [SPARSEFLAGS= CGCCFLAGS=])
507 AC_SUBST([SPARSEFLAGS])
508 AC_SUBST([CGCCFLAGS])])
509
32e96ab7
AZ		 510dnl OVS_SPARSE_EXTRA_INCLUDES
511dnl
512dnl The cgcc script from "sparse" does not search gcc's default
513dnl search path. Get the default search path from GCC and pass
514dnl them to sparse.
515AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
516 AC_SUBST([SPARSE_EXTRA_INCLUDES],
517 [`$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 ' ' `] ))
518
29d935d6
BP		 519dnl OVS_ENABLE_SPARSE
520AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 521 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 522 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 523 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 524 : ${SPARSE=sparse}
525 AC_SUBST([SPARSE])
526 AC_CONFIG_COMMANDS_PRE(
527 [if test $ovs_cv_gnu_make_if = yes; then
32e96ab7 528 CC='$(if $(C),REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 529 fi])])
8a8cd0ac
BP		 530
531dnl OVS_PTHREAD_SET_NAME
532dnl
533dnl This checks for three known variants of pthreads functions for setting
534dnl the name of the current thread:
535dnl
536dnl glibc: int pthread_setname_np(pthread_t, const char *name);
537dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
538dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
539dnl
540dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
541dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
542dnl provide to it.
543dnl
544dnl This macro defines:
545dnl
546dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
547dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
548dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
549AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
550 [AC_CHECK_FUNCS([pthread_set_name_np])
551 if test $ac_cv_func_pthread_set_name_np != yes; then
552 AC_CACHE_CHECK(
553 [for pthread_setname_np() variant],
554 [ovs_cv_pthread_setname_np],
555 [AC_LINK_IFELSE(
556 [AC_LANG_PROGRAM([#include <pthread.h>
557 ], [pthread_setname_np(pthread_self(), "name");])],
558 [ovs_cv_pthread_setname_np=glibc],
559 [AC_LINK_IFELSE(
560 [AC_LANG_PROGRAM([#include <pthread.h>
561], [pthread_setname_np(pthread_self(), "%s", "name");])],
562 [ovs_cv_pthread_setname_np=netbsd],
563 [ovs_cv_pthread_setname_np=none])])])
564 case $ovs_cv_pthread_setname_np in # (
565 glibc)
566 AC_DEFINE(
567 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
568 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
569 ;; # (
570 netbsd)
571 AC_DEFINE(
572 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
573 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
574 ;;
575 esac
576 fi])
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