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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		 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 "$version" -ge 3; then
54af97ad 137 if test "$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 160dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
064af421
BP		 161dnl
162dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
8828e5c7
BP		 163dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
164dnl <REGEX> translated to uppercase.
064af421
BP		 165AC_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
189dnl OVS_DEFINE(NAME)
190dnl
191dnl Defines NAME to 1 in kcompat.h.
192AC_DEFUN([OVS_DEFINE], [
22bcc0e7 193 echo '#define $1 1' >> datapath/linux/kcompat.h.new
064af421
BP		 194])
195
064af421 196AC_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 206dnl OVS_CHECK_LINUX_COMPAT
064af421
BP		 207dnl
208dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
e3438006
BP		 209dnl the directory in $KBUILD.
210AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
22bcc0e7
JG		 211 rm -f datapath/linux/kcompat.h.new
212 mkdir -p datapath/linux
213 : > datapath/linux/kcompat.h.new
4aa13c0c 214
e3438006 215 OVS_GREP_IFELSE([$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([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
4aa13c0c 231
e3438006
BP		 232 OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
233 [OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
cf6cb3a2
JG		 234 [rcu_read_lock_held])])
235
6a33828d
BP		 236 # Check for the proto_data_valid member in struct sk_buff. The [^@]
237 # is necessary because some versions of this header remove the
238 # member but retain the kerneldoc comment that describes it (which
239 # starts with @). The brackets must be doubled because of m4
240 # quoting rules.
e3438006 241 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
6a33828d 242 [OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
60c4904f 243 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
e3438006 244 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
85444c3f 245 [OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
e3438006 246 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
8828e5c7 247 [skb_copy_from_linear_data_offset])
b9c15df9
PS		 248 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
249 [skb_reset_tail_pointer])
e3438006
BP		 250 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
251 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
4aa13c0c 252 [OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
e3438006 253 OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
d31f1109 254 [OVS_DEFINE([HAVE_ICMP6_HDR])])
e3438006 255 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
4aa13c0c 256 [OVS_DEFINE([HAVE_SKB_WARN_LRO])])
e3438006 257 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
6c4ea27c 258 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
d923a695 259 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
dc0d542d 260 OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
4aa13c0c 261
e3438006 262 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
4aa13c0c 263 [OVS_DEFINE([HAVE_BOOL_TYPE])])
e3438006 264 OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
e215ebca 265 [OVS_DEFINE([HAVE_CSUM_TYPES])])
8dbe1f9f
PS		 266 OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
267 [OVS_DEFINE([HAVE_CSUM_TYPES])])
4aa13c0c 268
e3438006
BP		 269 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
270 OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
4aa13c0c 271
14002a59 272 OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
e3438006 273 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
42d5dd95
TG		 274 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
275 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
276 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
e3438006 277 OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
4aa13c0c 278
e3438006 279 OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
431488e6
BP		 280 [OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
281
42d5dd95
TG		 282 OVS_GREP_IFELSE([$KSRC/include/linux/percpu.h], [this_cpu_ptr])
283
f285d3e7
TG		 284 OVS_GREP_IFELSE([$KSRC/include/linux/openvswitch.h], [openvswitch_handle_frame_hook],
285 [OVS_DEFINE([HAVE_RHEL_OVS_HOOK])])
286
064af421 287 OVS_CHECK_LOG2_H
4aa13c0c 288
22bcc0e7
JG		 289 if cmp -s datapath/linux/kcompat.h.new \
290 datapath/linux/kcompat.h >/dev/null 2>&1; then
291 rm datapath/linux/kcompat.h.new
064af421 292 else
22bcc0e7 293 mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
064af421
BP		 294 fi
295])
296
297dnl Checks for net/if_packet.h.
298AC_DEFUN([OVS_CHECK_IF_PACKET],
299 [AC_CHECK_HEADER([net/if_packet.h],
300 [HAVE_IF_PACKET=yes],
301 [HAVE_IF_PACKET=no])
302 AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
303 if test "$HAVE_IF_PACKET" = yes; then
304 AC_DEFINE([HAVE_IF_PACKET], [1],
305 [Define to 1 if net/if_packet.h is available.])
306 fi])
307
f6eb6b20 308dnl Checks for net/if_dl.h.
d30e714c 309dnl
d23fa2ed
YT		 310dnl (We use this as a proxy for checking whether we're building on FreeBSD
311dnl or NetBSD.)
9360d9b7
EM		 312AC_DEFUN([OVS_CHECK_IF_DL],
313 [AC_CHECK_HEADER([net/if_dl.h],
314 [HAVE_IF_DL=yes],
315 [HAVE_IF_DL=no])
316 AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
317 if test "$HAVE_IF_DL" = yes; then
318 AC_DEFINE([HAVE_IF_DL], [1],
319 [Define to 1 if net/if_dl.h is available.])
d30e714c 320
d23fa2ed 321 # On these platforms we use libpcap to access network devices.
d30e714c 322 AC_SEARCH_LIBS([pcap_open_live], [pcap])
9360d9b7
EM		 323 fi])
324
e50097d2
BP		 325dnl Checks for buggy strtok_r.
326dnl
327dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
328dnl with optimization that can cause segfaults:
329dnl
330dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
331AC_DEFUN([OVS_CHECK_STRTOK_R],
332 [AC_CACHE_CHECK(
333 [whether strtok_r macro segfaults on some inputs],
334 [ovs_cv_strtok_r_bug],
335 [AC_RUN_IFELSE(
336 [AC_LANG_PROGRAM([#include <stdio.h>
337 #include <string.h>
338 ],
339 [[char string[] = ":::";
340 char *save_ptr = (char *) 0xc0ffee;
341 char *token1, *token2;
342 token1 = strtok_r(string, ":", &save_ptr);
343 token2 = strtok_r(NULL, ":", &save_ptr);
5819a7cd 344 freopen ("/dev/null", "w", stdout);
e50097d2
BP		 345 printf ("%s %s\n", token1, token2);
346 return 0;
347 ]])],
348 [ovs_cv_strtok_r_bug=no],
349 [ovs_cv_strtok_r_bug=yes],
350 [ovs_cv_strtok_r_bug=yes])])
351 if test $ovs_cv_strtok_r_bug = yes; then
352 AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
353 [Define if strtok_r macro segfaults on some inputs])
354 fi
355])
356
064af421
BP		 357dnl ----------------------------------------------------------------------
358dnl These macros are from GNU PSPP, with the following original license:
359dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
360dnl This file is free software; the Free Software Foundation
361dnl gives unlimited permission to copy and/or distribute it,
362dnl with or without modifications, as long as this notice is preserved.
363
50194820 364AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
064af421
BP		 365 m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-], [_])])dnl
366 AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
367 [ovs_save_CFLAGS="$CFLAGS"
50194820
BP		 368 dnl Include -Werror in the compiler options, because without -Werror
369 dnl clang's GCC-compatible compiler driver does not return a failure
370 dnl exit status even though it complains about options it does not
371 dnl understand.
372 CFLAGS="$CFLAGS $WERROR $1"
064af421
BP		 373 AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no])
374 CFLAGS="$ovs_save_CFLAGS"])
375 if test $ovs_cv_name = yes; then
83f6c050 376 m4_if([$2], [], [:], [$2])
064af421
BP		 377 else
378 m4_if([$3], [], [:], [$3])
379 fi
380])
381
50194820
BP		 382dnl OVS_CHECK_WERROR
383dnl
384dnl Check whether the C compiler accepts -Werror.
385dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
386AC_DEFUN([OVS_CHECK_WERROR],
387 [WERROR=
388 _OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
389
390dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
391dnl Check whether the given C compiler OPTION is accepted.
392dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
393AC_DEFUN([OVS_CHECK_CC_OPTION],
394 [AC_REQUIRE([OVS_CHECK_WERROR])
395 _OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
396
064af421
BP		 397dnl OVS_ENABLE_OPTION([OPTION])
398dnl Check whether the given C compiler OPTION is accepted.
d161c099 399dnl If so, add it to WARNING_FLAGS.
064af421
BP		 400dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
401AC_DEFUN([OVS_ENABLE_OPTION],
d161c099
BP		 402 [OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
403 AC_SUBST([WARNING_FLAGS])])
c72e245a
BP		 404
405dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
406dnl Check whether the given C compiler OPTION is accepted.
407dnl If so, enable the given Automake CONDITIONAL.
408
409dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
410AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
411 [OVS_CHECK_CC_OPTION(
412 [$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
413 AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
064af421 414dnl ----------------------------------------------------------------------
ed2d4f6a
BP		 415
416dnl Check for too-old XenServer.
417AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
418 [AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
419 [if test -e /etc/redhat-release; then
420 ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
421 fi
422 if test -z "$ovs_cv_xsversion"; then
423 ovs_cv_xsversion=none
424 fi])
425 case $ovs_cv_xsversion in
426 none)
427 ;;
428
429 [[1-9]][[0-9]]* | dnl XenServer 10 or later
430 [[6-9]]* | dnl XenServer 6 or later
431 5.[[7-9]]* | dnl XenServer 5.7 or later
432 5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
433 5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
434 5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
435 ;;
436
437 *)
438 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.)])
439 ;;
440 esac])
29d935d6
BP		 441
442dnl OVS_MAKE_HAS_IF([if-true], [if-false])
443dnl
444dnl Checks whether make has the GNU make $(if condition,then,else) extension.
445dnl Runs 'if-true' if so, 'if-false' otherwise.
372d58a4 446AC_DEFUN([OVS_CHECK_MAKE_IF],
29d935d6
BP		 447 [AC_CACHE_CHECK(
448 [whether ${MAKE-make} has GNU make \$(if) extension],
449 [ovs_cv_gnu_make_if],
450 [cat <<'EOF' > conftest.mk
451conftest.out:
452 echo $(if x,y,z) > conftest.out
453.PHONY: all
454EOF
455 rm -f conftest.out
456 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
457 ${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
458 AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
459 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
460 result=`cat conftest.out`
461 rm -f conftest.mk conftest.out
462 if test "X$result" = "Xy"; then
463 ovs_cv_gnu_make_if=yes
464 else
465 ovs_cv_gnu_make_if=no
372d58a4 466 fi])])
29d935d6 467
b4e1bf8b
BP		 468dnl OVS_CHECK_GNU_MAKE
469dnl
470dnl Checks whether make is GNU make (because Linux kernel Makefiles
471dnl only work with GNU make).
472AC_DEFUN([OVS_CHECK_GNU_MAKE],
473 [AC_CACHE_CHECK(
474 [whether ${MAKE-make} is GNU make],
475 [ovs_cv_gnu_make],
476 [rm -f conftest.out
477 AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
478 ${MAKE-make} --version >conftest.out 2>&1
479 cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
480 result=`cat conftest.out`
481 rm -f conftest.mk conftest.out
482
483 case $result in # (
484 GNU*) ovs_cv_gnu_make=yes ;; # (
485 *) ovs_cv_gnu_make=no ;;
486 esac])
487 AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
488
643c0c34
BP		 489dnl OVS_CHECK_SPARSE_TARGET
490dnl
491dnl The "cgcc" script from "sparse" isn't very good at detecting the
492dnl target for which the code is being built. This helps it out.
493AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
494 [AC_CACHE_CHECK(
495 [target hint for cgcc],
496 [ac_cv_sparse_target],
497 [AS_CASE([`$CC -dumpmachine 2>/dev/null`],
498 [i?86-* | athlon-*], [ac_cv_sparse_target=x86],
499 [x86_64-*], [ac_cv_sparse_target=x86_64],
500 [ac_cv_sparse_target=other])])
501 AS_CASE([$ac_cv_sparse_target],
502 [x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
503 [x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
504 [SPARSEFLAGS= CGCCFLAGS=])
505 AC_SUBST([SPARSEFLAGS])
506 AC_SUBST([CGCCFLAGS])])
507
32e96ab7
AZ		 508dnl OVS_SPARSE_EXTRA_INCLUDES
509dnl
510dnl The cgcc script from "sparse" does not search gcc's default
511dnl search path. Get the default search path from GCC and pass
512dnl them to sparse.
513AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
514 AC_SUBST([SPARSE_EXTRA_INCLUDES],
515 [`$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 ' ' `] ))
516
29d935d6
BP		 517dnl OVS_ENABLE_SPARSE
518AC_DEFUN([OVS_ENABLE_SPARSE],
643c0c34 519 [AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
372d58a4 520 AC_REQUIRE([OVS_CHECK_MAKE_IF])
32e96ab7 521 AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
372d58a4
BP		 522 : ${SPARSE=sparse}
523 AC_SUBST([SPARSE])
524 AC_CONFIG_COMMANDS_PRE(
525 [if test $ovs_cv_gnu_make_if = yes; then
38b7a52b 526 CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'
372d58a4 527 fi])])
8a8cd0ac
BP		 528
529dnl OVS_PTHREAD_SET_NAME
530dnl
531dnl This checks for three known variants of pthreads functions for setting
532dnl the name of the current thread:
533dnl
534dnl glibc: int pthread_setname_np(pthread_t, const char *name);
535dnl NetBSD: int pthread_setname_np(pthread_t, const char *format, void *arg);
536dnl FreeBSD: int pthread_set_name_np(pthread_t, const char *name);
537dnl
538dnl For glibc and FreeBSD, the arguments are just a thread and its name. For
539dnl NetBSD, 'format' is a printf() format string and 'arg' is an argument to
540dnl provide to it.
541dnl
542dnl This macro defines:
543dnl
544dnl glibc: HAVE_GLIBC_PTHREAD_SETNAME_NP
545dnl NetBSD: HAVE_NETBSD_PTHREAD_SETNAME_NP
546dnl FreeBSD: HAVE_PTHREAD_SET_NAME_NP
547AC_DEFUN([OVS_CHECK_PTHREAD_SET_NAME],
548 [AC_CHECK_FUNCS([pthread_set_name_np])
549 if test $ac_cv_func_pthread_set_name_np != yes; then
550 AC_CACHE_CHECK(
551 [for pthread_setname_np() variant],
552 [ovs_cv_pthread_setname_np],
553 [AC_LINK_IFELSE(
554 [AC_LANG_PROGRAM([#include <pthread.h>
555 ], [pthread_setname_np(pthread_self(), "name");])],
556 [ovs_cv_pthread_setname_np=glibc],
557 [AC_LINK_IFELSE(
558 [AC_LANG_PROGRAM([#include <pthread.h>
559], [pthread_setname_np(pthread_self(), "%s", "name");])],
560 [ovs_cv_pthread_setname_np=netbsd],
561 [ovs_cv_pthread_setname_np=none])])])
562 case $ovs_cv_pthread_setname_np in # (
563 glibc)
564 AC_DEFINE(
565 [HAVE_GLIBC_PTHREAD_SETNAME_NP], [1],
566 [Define to 1 if pthread_setname_np() is available and takes 2 parameters (like glibc).])
567 ;; # (
568 netbsd)
569 AC_DEFINE(
570 [HAVE_NETBSD_PTHREAD_SETNAME_NP], [1],
571 [Define to 1 if pthread_setname_np() is available and takes 3 parameters (like NetBSD).])
572 ;;
573 esac
574 fi])
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