m4/openvswitch.m4

   1 # -*- autoconf -*-
   2
   3 # Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
   4 #
   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:
   8 #
   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.
  16 #
  17 m4_include([m4/compat.at])
  18
  19 dnl Checks for --enable-coverage and updates CFLAGS and LDFLAGS appropriately.
  20 AC_DEFUN([OVS_CHECK_COVERAGE],
  21   [AC_REQUIRE([AC_PROG_CC])
  22    AC_ARG_ENABLE(
  23      [coverage],
  24      [AC_HELP_STRING([--enable-coverage],
  25                      [Enable gcov coverage tool.])],
  26      [case "${enableval}" in
  27         (yes) coverage=true ;;
  28         (no)  coverage=false ;;
  29         (*) AC_MSG_ERROR([bad value ${enableval} for --enable-coverage]) ;;
  30       esac],
  31      [coverage=false])
  32    if $coverage; then
  33      # Autoconf by default puts "-g -O2" in CFLAGS.  We need to remove the -O2
  34      # option for coverage to be useful.  This does it without otherwise
  35      # interfering with anything that the user might have put there.
  36      old_CFLAGS=$CFLAGS
  37      CFLAGS=
  38      for option in $old_CFLAGS; do
  39         case $option in
  40             (-O2) ;;
  41             (*) CFLAGS="$CFLAGS $option" ;;
  42         esac
  43      done
  44
  45      OVS_CFLAGS="$OVS_CFLAGS --coverage"
  46      OVS_LDFLAGS="$OVS_LDFLAGS --coverage"
  47    fi])
  48
  49 dnl Checks for --enable-ndebug and defines NDEBUG if it is specified.
  50 AC_DEFUN([OVS_CHECK_NDEBUG],
  51   [AC_ARG_ENABLE(
  52      [ndebug],
  53      [AC_HELP_STRING([--enable-ndebug],
  54                      [Disable debugging features for max performance])],
  55      [case "${enableval}" in
  56         (yes) ndebug=true ;;
  57         (no)  ndebug=false ;;
  58         (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ndebug]) ;;
  59       esac],
  60      [ndebug=false])
  61    AM_CONDITIONAL([NDEBUG], [test x$ndebug = xtrue])])
  62
  63 dnl Checks for ESX.
  64 AC_DEFUN([OVS_CHECK_ESX],
  65   [AC_CHECK_HEADER([vmware.h],
  66                    [ESX=yes],
  67                    [ESX=no])
  68    AM_CONDITIONAL([ESX], [test "$ESX" = yes])
  69    if test "$ESX" = yes; then
  70       AC_DEFINE([ESX], [1], [Define to 1 if building on ESX.])
  71    fi])
  72
  73 dnl Checks for WINDOWS.
  74 AC_DEFUN([OVS_CHECK_WIN32],
  75   [AC_CHECK_HEADER([windows.h],
  76                    [WIN32=yes],
  77                    [WIN32=no])
  78    AM_CONDITIONAL([WIN32], [test "$WIN32" = yes])
  79    if test "$WIN32" = yes; then
  80       AC_ARG_WITH([pthread],
  81          [AS_HELP_STRING([--with-pthread=DIR],
  82             [root of the pthread-win32 directory])],
  83          [
  84             case "$withval" in
  85             "" | y | ye | yes | n | no)
  86             AC_MSG_ERROR([Invalid --with-pthread value])
  87               ;;
  88             *)
  89             PTHREAD_INCLUDES="-I$withval/include"
  90             PTHREAD_LDFLAGS="-L$withval/lib/x86"
  91             PTHREAD_LIBS="-lpthreadVC2"
  92             AC_SUBST([PTHREAD_INCLUDES])
  93             AC_SUBST([PTHREAD_LDFLAGS])
  94             AC_SUBST([PTHREAD_LIBS])
  95               ;;
  96             esac
  97          ], [
  98             AC_MSG_ERROR([pthread directory not specified])
  99          ]
 100       )
 101       AC_ARG_WITH([debug],
 102          [AS_HELP_STRING([--with-debug],
 103             [Build without compiler optimizations])],
 104          [
 105             MSVC_CFLAGS="-O0"
 106             AC_SUBST([MSVC_CFLAGS])
 107          ], [
 108             MSVC_CFLAGS="-O2"
 109             AC_SUBST([MSVC_CFLAGS])
 110          ]
 111       )
 112
 113       AC_DEFINE([WIN32], [1], [Define to 1 if building on WIN32.])
 114       AH_BOTTOM([#ifdef WIN32
 115 #include "include/windows/windefs.h"
 116 #endif])
 117    fi])
 118
 119 dnl OVS_CHECK_WINDOWS
 120 dnl
 121 dnl Configure Visual Studio solution build
 122 AC_DEFUN([OVS_CHECK_VISUAL_STUDIO_DDK], [
 123 AC_ARG_WITH([vstudiotarget],
 124          [AS_HELP_STRING([--with-vstudiotarget=target_type],
 125             [Target type: Debug/Release])],
 126          [
 127             case "$withval" in
 128             "Release") ;;
 129             "Debug") ;;
 130             *) AC_MSG_ERROR([No valid Visual Studio configuration found]) ;;
 131             esac
 132
 133             VSTUDIO_CONFIG=$withval
 134          ], [
 135             VSTUDIO_CONFIG=
 136          ]
 137       )
 138
 139   AC_SUBST([VSTUDIO_CONFIG])
 140   AC_DEFINE([VSTUDIO_DDK], [1], [System uses the Visual Studio build target.])
 141   AM_CONDITIONAL([VSTUDIO_DDK], [test -n "$VSTUDIO_CONFIG"])
 142 ])
 143
 144 dnl Checks for Netlink support.
 145 AC_DEFUN([OVS_CHECK_NETLINK],
 146   [AC_CHECK_HEADER([linux/netlink.h],
 147                    [HAVE_NETLINK=yes],
 148                    [HAVE_NETLINK=no],
 149                    [#include <sys/socket.h>
 150    ])
 151    AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
 152    if test "$HAVE_NETLINK" = yes; then
 153       AC_DEFINE([HAVE_NETLINK], [1],
 154                 [Define to 1 if Netlink protocol is available.])
 155    fi])
 156
 157 dnl Checks for OpenSSL.
 158 AC_DEFUN([OVS_CHECK_OPENSSL],
 159   [AC_ARG_ENABLE(
 160      [ssl],
 161      [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
 162      [case "${enableval}" in
 163         (yes) ssl=true ;;
 164         (no)  ssl=false ;;
 165         (*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
 166       esac],
 167      [ssl=check])
 168
 169    if test "$ssl" != false; then
 170        AX_CHECK_OPENSSL(
 171          [HAVE_OPENSSL=yes],
 172          [HAVE_OPENSSL=no
 173           if test "$ssl" = check; then
 174             AC_MSG_WARN([Cannot find openssl:
 175
 176 $SSL_PKG_ERRORS
 177
 178 OpenFlow connections over SSL will not be supported.
 179 (You may use --disable-ssl to suppress this warning.)])
 180           else
 181             AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
 182           fi])
 183    else
 184        HAVE_OPENSSL=no
 185    fi
 186    AC_SUBST([HAVE_OPENSSL])
 187    AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
 188    if test "$HAVE_OPENSSL" = yes; then
 189       AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
 190    fi])
 191
 192 dnl Checks for libraries needed by lib/socket-util.c.
 193 AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
 194   [AC_CHECK_LIB([socket], [connect])
 195    AC_SEARCH_LIBS([gethostbyname], [resolv])])
 196
 197 dnl Checks for the directory in which to store the PKI.
 198 AC_DEFUN([OVS_CHECK_PKIDIR],
 199   [AC_ARG_WITH(
 200      [pkidir],
 201      AC_HELP_STRING([--with-pkidir=DIR],
 202                     [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
 203      [PKIDIR=$withval],
 204      [PKIDIR='${localstatedir}/lib/openvswitch/pki'])
 205    AC_SUBST([PKIDIR])])
 206
 207 dnl Checks for the directory in which to store pidfiles.
 208 AC_DEFUN([OVS_CHECK_RUNDIR],
 209   [AC_ARG_WITH(
 210      [rundir],
 211      AC_HELP_STRING([--with-rundir=DIR],
 212                     [directory used for pidfiles
 213                     [[LOCALSTATEDIR/run/openvswitch]]]),
 214      [RUNDIR=$withval],
 215      [RUNDIR='${localstatedir}/run/openvswitch'])
 216    AC_SUBST([RUNDIR])])
 217
 218 dnl Checks for the directory in which to store logs.
 219 AC_DEFUN([OVS_CHECK_LOGDIR],
 220   [AC_ARG_WITH(
 221      [logdir],
 222      AC_HELP_STRING([--with-logdir=DIR],
 223                     [directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
 224      [LOGDIR=$withval],
 225      [LOGDIR='${localstatedir}/log/${PACKAGE}'])
 226    AC_SUBST([LOGDIR])])
 227
 228 dnl Checks for the directory in which to store the Open vSwitch database.
 229 AC_DEFUN([OVS_CHECK_DBDIR],
 230   [AC_ARG_WITH(
 231      [dbdir],
 232      AC_HELP_STRING([--with-dbdir=DIR],
 233                     [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
 234      [DBDIR=$withval],
 235      [DBDIR='${sysconfdir}/${PACKAGE}'])
 236    AC_SUBST([DBDIR])])
 237
 238 dnl Defines HAVE_BACKTRACE if backtrace() is found.
 239 AC_DEFUN([OVS_CHECK_BACKTRACE],
 240   [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
 241                   [AC_DEFINE([HAVE_BACKTRACE], [1],
 242                              [Define to 1 if you have backtrace(3).])])])
 243
 244 dnl Defines HAVE_PERF_EVENT if linux/perf_event.h is found.
 245 AC_DEFUN([OVS_CHECK_PERF_EVENT],
 246   [AC_CHECK_HEADERS([linux/perf_event.h])])
 247
 248 dnl Checks for valgrind/valgrind.h.
 249 AC_DEFUN([OVS_CHECK_VALGRIND],
 250   [AC_CHECK_HEADERS([valgrind/valgrind.h])])
 251
 252 dnl Checks for Python 2.x, x >= 4.
 253 AC_DEFUN([OVS_CHECK_PYTHON],
 254   [AC_CACHE_CHECK(
 255      [for Python 2.x for x >= 4],
 256      [ovs_cv_python],
 257      [if test -n "$PYTHON"; then
 258         ovs_cv_python=$PYTHON
 259       else
 260         ovs_cv_python=no
 261         for binary in python python2.4 python2.5 python2.7; do
 262           ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 263           for dir in $PATH; do
 264             IFS=$ovs_save_IFS
 265             test -z "$dir" && dir=.
 266             if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
 267 if sys.hexversion >= 0x02040000 and sys.hexversion < 0x03000000:
 268     sys.exit(0)
 269 else:
 270     sys.exit(1)'; then
 271               ovs_cv_python=$dir/$binary
 272               break 2
 273             fi
 274           done
 275         done
 276       fi])
 277    AC_SUBST([HAVE_PYTHON])
 278    AM_MISSING_PROG([PYTHON], [python])
 279    if test $ovs_cv_python != no; then
 280      PYTHON=$ovs_cv_python
 281      HAVE_PYTHON=yes
 282    else
 283      HAVE_PYTHON=no
 284    fi
 285    AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
 286
 287 dnl Checks for dot.
 288 AC_DEFUN([OVS_CHECK_DOT],
 289   [AC_CACHE_CHECK(
 290     [for dot],
 291     [ovs_cv_dot],
 292     [dnl "dot" writes -V output to stderr:
 293      if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
 294        ovs_cv_dot=yes
 295      else
 296        ovs_cv_dot=no
 297      fi])
 298    AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
 299
 300 dnl Checks whether $PYTHON supports the module given as $1
 301 AC_DEFUN([OVS_CHECK_PYTHON_MODULE],
 302   [AC_REQUIRE([OVS_CHECK_PYTHON])
 303    AC_CACHE_CHECK(
 304      [for $1 Python module],
 305      [ovs_cv_py_[]AS_TR_SH([$1])],
 306      [ovs_cv_py_[]AS_TR_SH([$1])=no
 307       if test $HAVE_PYTHON = yes; then
 308         AS_ECHO(["running $PYTHON -c 'import $1
 309 import sys
 310 sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1
 311         if $PYTHON -c 'import $1
 312 import sys
 313 sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then
 314           ovs_cv_py_[]AS_TR_SH([$1])=yes
 315         fi
 316       fi])])
 317
 318 dnl Checks for missing python modules at build time
 319 AC_DEFUN([OVS_CHECK_PYTHON_COMPAT],
 320   [OVS_CHECK_PYTHON_MODULE([uuid])
 321    if test $ovs_cv_py_uuid = yes; then
 322      INCLUDE_PYTHON_COMPAT=no
 323    else
 324      INCLUDE_PYTHON_COMPAT=yes
 325    fi
 326    AC_MSG_CHECKING([whether to add python/compat to PYTHONPATH])
 327    AC_MSG_RESULT([$INCLUDE_PYTHON_COMPAT])
 328    AM_CONDITIONAL([INCLUDE_PYTHON_COMPAT], [test $INCLUDE_PYTHON_COMPAT = yes])])
 329
 330 dnl Checks for groff.
 331 AC_DEFUN([OVS_CHECK_GROFF],
 332   [AC_CACHE_CHECK(
 333     [for groff],
 334     [ovs_cv_groff],
 335     [if (groff -v) >/dev/null 2>&1; then
 336        ovs_cv_groff=yes
 337      else
 338        ovs_cv_groff=no
 339      fi])
 340    AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
 341
 342 dnl Checks for thread-local storage support.
 343 dnl
 344 dnl Checks whether the compiler and linker support the C11
 345 dnl thread_local macro from <threads.h>, and if so defines
 346 dnl HAVE_THREAD_LOCAL.  If not, checks whether the compiler and linker
 347 dnl support the GCC __thread extension, and if so defines
 348 dnl HAVE___THREAD.
 349 AC_DEFUN([OVS_CHECK_TLS],
 350   [AC_CACHE_CHECK(
 351      [whether $CC has <threads.h> that supports thread_local],
 352      [ovs_cv_thread_local],
 353      [AC_LINK_IFELSE(
 354         [AC_LANG_PROGRAM([#include <threads.h>
 355 static thread_local int var;], [return var;])],
 356         [ovs_cv_thread_local=yes],
 357         [ovs_cv_thread_local=no])])
 358    if test $ovs_cv_thread_local = yes; then
 359      AC_DEFINE([HAVE_THREAD_LOCAL], [1],
 360                [Define to 1 if the C compiler and linker supports the C11
 361                 thread_local matcro defined in <threads.h>.])
 362    else
 363      AC_CACHE_CHECK(
 364        [whether $CC supports __thread],
 365        [ovs_cv___thread],
 366        [AC_LINK_IFELSE(
 367           [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
 368           [ovs_cv___thread=yes],
 369           [ovs_cv___thread=no])])
 370      if test $ovs_cv___thread = yes; then
 371        AC_DEFINE([HAVE___THREAD], [1],
 372                  [Define to 1 if the C compiler and linker supports the
 373                   GCC __thread extenions.])
 374      fi
 375    fi])
 376
 377 dnl OVS_CHECK_ATOMIC_LIBS
 378 dnl
 379 dnl Check to see if -latomic is need for GCC atomic built-ins.
 380 AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
 381    [AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
 382
 383 dnl OVS_CHECK_GCC4_ATOMICS
 384 dnl
 385 dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
 386 dnl A compile-time only check is not enough because the compiler defers
 387 dnl unimplemented built-ins to libgcc, which sometimes also lacks
 388 dnl implementations.
 389 AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
 390   [AC_CACHE_CHECK(
 391      [whether $CC supports GCC 4.0+ atomic built-ins],
 392      [ovs_cv_gcc4_atomics],
 393      [AC_LINK_IFELSE(
 394         [AC_LANG_PROGRAM([[#include <stdlib.h>
 395
 396 #define ovs_assert(expr) if (!(expr)) abort();
 397 #define TEST_ATOMIC_TYPE(TYPE)                  \
 398     {                                           \
 399         TYPE x = 1;                             \
 400         TYPE orig;                              \
 401                                                 \
 402         __sync_synchronize();                   \
 403         ovs_assert(x == 1);                     \
 404                                                 \
 405         __sync_synchronize();                   \
 406         x = 3;                                  \
 407         __sync_synchronize();                   \
 408         ovs_assert(x == 3);                     \
 409                                                 \
 410         orig = __sync_fetch_and_add(&x, 1);     \
 411         ovs_assert(orig == 3);                  \
 412         __sync_synchronize();                   \
 413         ovs_assert(x == 4);                     \
 414                                                 \
 415         orig = __sync_fetch_and_sub(&x, 2);     \
 416         ovs_assert(orig == 4);                  \
 417         __sync_synchronize();                   \
 418         ovs_assert(x == 2);                     \
 419                                                 \
 420         orig = __sync_fetch_and_or(&x, 6);      \
 421         ovs_assert(orig == 2);                  \
 422         __sync_synchronize();                   \
 423         ovs_assert(x == 6);                     \
 424                                                 \
 425         orig = __sync_fetch_and_and(&x, 10);    \
 426         ovs_assert(orig == 6);                  \
 427         __sync_synchronize();                   \
 428         ovs_assert(x == 2);                     \
 429                                                 \
 430         orig = __sync_fetch_and_xor(&x, 10);    \
 431         ovs_assert(orig == 2);                  \
 432         __sync_synchronize();                   \
 433         ovs_assert(x == 8);                     \
 434     }]], [dnl
 435 TEST_ATOMIC_TYPE(char);
 436 TEST_ATOMIC_TYPE(unsigned char);
 437 TEST_ATOMIC_TYPE(signed char);
 438 TEST_ATOMIC_TYPE(short);
 439 TEST_ATOMIC_TYPE(unsigned short);
 440 TEST_ATOMIC_TYPE(int);
 441 TEST_ATOMIC_TYPE(unsigned int);
 442 TEST_ATOMIC_TYPE(long int);
 443 TEST_ATOMIC_TYPE(unsigned long int);
 444 TEST_ATOMIC_TYPE(long long int);
 445 TEST_ATOMIC_TYPE(unsigned long long int);
 446 ])],
 447         [ovs_cv_gcc4_atomics=yes],
 448         [ovs_cv_gcc4_atomics=no])])
 449    if test $ovs_cv_gcc4_atomics = yes; then
 450      AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
 451                [Define to 1 if the C compiler and linker supports the GCC 4.0+
 452                 atomic built-ins.])
 453    fi])
 454
 455 dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
 456 dnl
 457 dnl Checks __atomic_always_lock_free(SIZE, 0)
 458 AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
 459   [AC_CACHE_CHECK(
 460     [value of __atomic_always_lock_free($1)],
 461     [ovs_cv_atomic_always_lock_free_$1],
 462     [AC_COMPUTE_INT(
 463         [ovs_cv_atomic_always_lock_free_$1],
 464         [__atomic_always_lock_free($1, 0)],
 465         [],
 466         [ovs_cv_atomic_always_lock_free_$1=unsupported])])
 467    if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
 468      AC_DEFINE_UNQUOTED(
 469        [ATOMIC_ALWAYS_LOCK_FREE_$1B],
 470        [$ovs_cv_atomic_always_lock_free_$1],
 471        [If the C compiler is GCC 4.7 or later, define to the return value of
 472         __atomic_always_lock_free($1, 0).  If the C compiler is not GCC or is
 473         an older version of GCC, the value does not matter.])
 474    fi])
 475
 476 dnl OVS_CHECK_POSIX_AIO
 477 AC_DEFUN([OVS_CHECK_POSIX_AIO],
 478   [AC_SEARCH_LIBS([aio_write], [rt])
 479    AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
 480
 481 dnl OVS_CHECK_INCLUDE_NEXT
 482 AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
 483   [AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
 484    gl_CHECK_NEXT_HEADERS([$1])])
 485
 486 dnl OVS_CHECK_PRAGMA_MESSAGE
 487 AC_DEFUN([OVS_CHECK_PRAGMA_MESSAGE],
 488   [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
 489    [[_Pragma("message(\"Checking for pragma message\")")
 490    ]])],
 491      [AC_DEFINE(HAVE_PRAGMA_MESSAGE,1,[Define if compiler supports #pragma
 492      message directive])])
 493   ])