# -*- autoconf -*-
-# Copyright (c) 2008, 2009 Nicira Networks.
+# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
[AC_REQUIRE([AC_PROG_CC])
AC_ARG_ENABLE(
[coverage],
- [AC_HELP_STRING([--enable-coverage],
+ [AC_HELP_STRING([--enable-coverage],
[Enable gcov coverage tool.])],
[case "${enableval}" in
- (lcov) coverage=true lcov=true ;;
- (yes) coverage=true lcov=false ;;
- (no) coverage=false lcov=false ;;
+ (yes) coverage=true ;;
+ (no) coverage=false ;;
(*) AC_MSG_ERROR([bad value ${enableval} for --enable-coverage]) ;;
esac],
- [coverage=false lcov=false])
+ [coverage=false])
if $coverage; then
CFLAGS="$CFLAGS -O0 --coverage"
LDFLAGS="$LDFLAGS --coverage"
- fi
- if $lcov; then
- if lcov --version >/dev/null 2>&1; then :; else
- AC_MSG_ERROR([--enable-coverage=lcov was specified but lcov is not in \$PATH])
- fi
- fi
- AC_SUBST([LCOV], [$lcov])])
+ fi])
dnl Checks for --enable-ndebug and defines NDEBUG if it is specified.
AC_DEFUN([OVS_CHECK_NDEBUG],
[AC_ARG_ENABLE(
[ndebug],
- [AC_HELP_STRING([--enable-ndebug],
+ [AC_HELP_STRING([--enable-ndebug],
[Disable debugging features for max performance])],
[case "${enableval}" in
(yes) ndebug=true ;;
[ndebug=false])
AM_CONDITIONAL([NDEBUG], [test x$ndebug = xtrue])])
+dnl Checks for ESX.
+AC_DEFUN([OVS_CHECK_ESX],
+ [AC_CHECK_HEADER([vmware.h],
+ [ESX=yes],
+ [ESX=no])
+ AM_CONDITIONAL([ESX], [test "$ESX" = yes])
+ if test "$ESX" = yes; then
+ AC_DEFINE([ESX], [1], [Define to 1 if building on ESX.])
+ fi])
+
dnl Checks for Netlink support.
AC_DEFUN([OVS_CHECK_NETLINK],
[AC_CHECK_HEADER([linux/netlink.h],
[Define to 1 if Netlink protocol is available.])
fi])
-dnl Checks for OpenSSL, if --enable-ssl is passed in.
+dnl Checks for OpenSSL.
AC_DEFUN([OVS_CHECK_OPENSSL],
[AC_ARG_ENABLE(
[ssl],
- [AC_HELP_STRING([--enable-ssl],
- [Enable ssl support (requires libssl)])],
+ [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
[case "${enableval}" in
(yes) ssl=true ;;
(no) ssl=false ;;
(*) AC_MSG_ERROR([bad value ${enableval} for --enable-ssl]) ;;
esac],
- [ssl=false])
+ [ssl=check])
- if test "$ssl" = true; then
- dnl Make sure that pkg-config is installed.
- m4_pattern_forbid([PKG_CHECK_MODULES])
- PKG_CHECK_MODULES([SSL], [libssl],
- [HAVE_OPENSSL=yes],
- [HAVE_OPENSSL=no
- AC_MSG_WARN([Cannot find libssl:
+ if test "$ssl" != false; then
+ AX_CHECK_OPENSSL(
+ [HAVE_OPENSSL=yes],
+ [HAVE_OPENSSL=no
+ if test "$ssl" = check; then
+ AC_MSG_WARN([Cannot find openssl:
- $SSL_PKG_ERRORS
-
- OpenFlow connections over SSL will not be supported.])])
+$SSL_PKG_ERRORS
+OpenFlow connections over SSL will not be supported.
+(You may use --disable-ssl to suppress this warning.)])
+ else
+ AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
+ fi])
+ else
+ HAVE_OPENSSL=no
fi
+ AC_SUBST([HAVE_OPENSSL])
AM_CONDITIONAL([HAVE_OPENSSL], [test "$HAVE_OPENSSL" = yes])
if test "$HAVE_OPENSSL" = yes; then
AC_DEFINE([HAVE_OPENSSL], [1], [Define to 1 if OpenSSL is installed.])
fi])
-dnl Checks for libraries needed by lib/fault.c.
-AC_DEFUN([OVS_CHECK_FAULT_LIBS],
- [AC_CHECK_LIB([dl], [dladdr], [FAULT_LIBS=-ldl])
- AC_SUBST([FAULT_LIBS])])
-
dnl Checks for libraries needed by lib/socket-util.c.
AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
[AC_CHECK_LIB([socket], [connect])
dnl Checks for the directory in which to store the PKI.
AC_DEFUN([OVS_CHECK_PKIDIR],
[AC_ARG_WITH(
- [pkidir],
- AC_HELP_STRING([--with-pkidir=DIR],
- [PKI hierarchy directory [[DATADIR/openvswitch/pki]]]),
+ [pkidir],
+ AC_HELP_STRING([--with-pkidir=DIR],
+ [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
[PKIDIR=$withval],
- [PKIDIR='${pkgdatadir}/pki'])
+ [PKIDIR='${localstatedir}/lib/openvswitch/pki'])
AC_SUBST([PKIDIR])])
dnl Checks for the directory in which to store pidfiles.
AC_DEFUN([OVS_CHECK_RUNDIR],
[AC_ARG_WITH(
- [rundir],
- AC_HELP_STRING([--with-rundir=DIR],
- [directory used for pidfiles [[LOCALSTATEDIR/run]]]),
+ [rundir],
+ AC_HELP_STRING([--with-rundir=DIR],
+ [directory used for pidfiles
+ [[LOCALSTATEDIR/run/openvswitch]]]),
[RUNDIR=$withval],
- [RUNDIR='${localstatedir}/run'])
+ [RUNDIR='${localstatedir}/run/openvswitch'])
AC_SUBST([RUNDIR])])
dnl Checks for the directory in which to store logs.
AC_DEFUN([OVS_CHECK_LOGDIR],
[AC_ARG_WITH(
- [logdir],
- AC_HELP_STRING([--with-logdir=DIR],
+ [logdir],
+ AC_HELP_STRING([--with-logdir=DIR],
[directory used for logs [[LOCALSTATEDIR/log/PACKAGE]]]),
[LOGDIR=$withval],
[LOGDIR='${localstatedir}/log/${PACKAGE}'])
AC_SUBST([LOGDIR])])
+dnl Checks for the directory in which to store the Open vSwitch database.
+AC_DEFUN([OVS_CHECK_DBDIR],
+ [AC_ARG_WITH(
+ [dbdir],
+ AC_HELP_STRING([--with-dbdir=DIR],
+ [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
+ [DBDIR=$withval],
+ [DBDIR='${sysconfdir}/${PACKAGE}'])
+ AC_SUBST([DBDIR])])
+
+dnl Defines HAVE_BACKTRACE if backtrace() is found.
+AC_DEFUN([OVS_CHECK_BACKTRACE],
+ [AC_SEARCH_LIBS([backtrace], [execinfo ubacktrace],
+ [AC_DEFINE([HAVE_BACKTRACE], [1],
+ [Define to 1 if you have backtrace(3).])])])
+
dnl Checks for __malloc_hook, etc., supported by glibc.
AC_DEFUN([OVS_CHECK_MALLOC_HOOKS],
[AC_CACHE_CHECK(
[AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[#include <malloc.h>
- ],
+ ],
[(void) __malloc_hook;
(void) __realloc_hook;
(void) __free_hook;])],
[ovs_cv_malloc_hooks=yes],
[ovs_cv_malloc_hooks=no])])
if test $ovs_cv_malloc_hooks = yes; then
- AC_DEFINE([HAVE_MALLOC_HOOKS], [1],
+ AC_DEFINE([HAVE_MALLOC_HOOKS], [1],
[Define to 1 if you have __malloc_hook, __realloc_hook, and
__free_hook in <malloc.h>.])
fi])
dnl Checks for valgrind/valgrind.h.
-AC_DEFUN([OVS_CHECK_VALGRIND],
+AC_DEFUN([OVS_CHECK_VALGRIND],
[AC_CHECK_HEADERS([valgrind/valgrind.h])])
-dnl Searches for a directory to put lockfiles for tty devices.
-dnl Defines C preprocessor variable TTY_LOCK_DIR to a quoted string
-dnl for that directory.
-AC_DEFUN([OVS_CHECK_TTY_LOCK_DIR],
- [AC_CACHE_CHECK([directory used for serial device lockfiles],
- [ovs_cv_path_tty_locks],
- [# This list of candidate directories is from minicom.
- ovs_cv_path_tty_locks=none
- for dir in /etc/locks /var/lock /usr/spool/locks \
- /var/spool/locks /var/spool/lock \
- /usr/spool/uucp /var/spool/uucp /var/run; do
- if test -d $dir; then
- ovs_cv_path_tty_locks=$dir
- break
- fi
- done])
- if test "$ovs_cv_path_tty_locks" = none; then
- AC_MSG_ERROR([cannot find a directory for tty locks])
- fi
- AC_DEFINE_UNQUOTED([TTY_LOCK_DIR], "$ovs_cv_path_tty_locks",
- [Directory used for serial device lockfiles])])
-
-dnl The following check is adapted from GNU PSPP.
-dnl It searches for the ncurses library. If it finds it, it sets
-dnl HAVE_CURSES to yes and sets NCURSES_LIBS and NCURSES_CFLAGS
-dnl appropriate. Otherwise, it sets HAVE_CURSES to no.
-AC_DEFUN([OVS_CHECK_CURSES],
- [if test "$cross_compiling" != yes; then
- AC_CHECK_PROGS([NCURSES_CONFIG], [ncurses5-config ncurses8-config])
- fi
- if test "$NCURSES_CONFIG" = ""; then
- AC_SEARCH_LIBS([tgetent], [ncurses],
- [AC_CHECK_HEADERS([term.h curses.h],
- [HAVE_CURSES=yes],
- [HAVE_CURSES=no])])
- else
- save_cflags=$CFLAGS
- CFLAGS="$CFLAGS $($NCURSES_CONFIG --cflags)"
- AC_CHECK_HEADERS([term.h curses.h],
- [HAVE_CURSES=yes],
- [HAVE_CURSES=no])
- CFLAGS=$save_cflags
- if test "$HAVE_CURSES" = yes; then
- NCURSES_LIBS=$($NCURSES_CONFIG --libs)
- NCURSES_CFLAGS=$($NCURSES_CONFIG --cflags)
- AC_SUBST(NCURSES_CFLAGS)
- AC_SUBST(NCURSES_LIBS)
- fi
- fi
- AM_CONDITIONAL([HAVE_CURSES], [test "$HAVE_CURSES" = yes])])
-
-dnl Checks for linux/vt.h.
-AC_DEFUN([OVS_CHECK_LINUX_VT_H],
- [AC_CHECK_HEADER([linux/vt.h],
- [HAVE_LINUX_VT_H=yes],
- [HAVE_LINUX_VT_H=no])
- AM_CONDITIONAL([HAVE_LINUX_VT_H], [test "$HAVE_LINUX_VT_H" = yes])
- if test "$HAVE_LINUX_VT_H" = yes; then
- AC_DEFINE([HAVE_LINUX_VT_H], [1],
- [Define to 1 if linux/vt.h is available.])
- fi])
-
-dnl Checks for libpcre.
-AC_DEFUN([OVS_CHECK_PCRE],
- [dnl Make sure that pkg-config is installed.
- m4_pattern_forbid([PKG_CHECK_MODULES])
- PKG_CHECK_MODULES([PCRE], [libpcre >= 7.2], [HAVE_PCRE=yes], [HAVE_PCRE=no])
- AM_CONDITIONAL([HAVE_PCRE], [test "$HAVE_PCRE" = yes])
- if test "$HAVE_PCRE" = yes; then
- AC_DEFINE([HAVE_PCRE], [1], [Define to 1 if libpcre is installed.])
- fi])
-
dnl Checks for Python 2.x, x >= 4.
AC_DEFUN([OVS_CHECK_PYTHON],
[AC_CACHE_CHECK(
done
done
fi])
+ AC_SUBST([HAVE_PYTHON])
AM_MISSING_PROG([PYTHON], [python])
if test $ovs_cv_python != no; then
PYTHON=$ovs_cv_python
+ HAVE_PYTHON=yes
+ else
+ HAVE_PYTHON=no
+ fi
+ AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
+
+dnl Checks for dot.
+AC_DEFUN([OVS_CHECK_DOT],
+ [AC_CACHE_CHECK(
+ [for dot],
+ [ovs_cv_dot],
+ [dnl "dot" writes -V output to stderr:
+ if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
+ ovs_cv_dot=yes
+ else
+ ovs_cv_dot=no
+ fi])
+ AM_CONDITIONAL([HAVE_DOT], [test "$ovs_cv_dot" = yes])])
+
+dnl Checks for pyuic4.
+AC_DEFUN([OVS_CHECK_PYUIC4],
+ [AC_CACHE_CHECK(
+ [for pyuic4],
+ [ovs_cv_pyuic4],
+ [if (pyuic4 --version) >/dev/null 2>&1; then
+ ovs_cv_pyuic4=pyuic4
+ else
+ ovs_cv_pyuic4=no
+ fi])
+ AM_MISSING_PROG([PYUIC4], [pyuic4])
+ if test $ovs_cv_pyuic4 != no; then
+ PYUIC4=$ovs_cv_pyuic4
fi])
+
+dnl Checks whether $PYTHON supports the module given as $1
+AC_DEFUN([OVS_CHECK_PYTHON_MODULE],
+ [AC_REQUIRE([OVS_CHECK_PYTHON])
+ AC_CACHE_CHECK(
+ [for $1 Python module],
+ [ovs_cv_py_[]AS_TR_SH([$1])],
+ [ovs_cv_py_[]AS_TR_SH([$1])=no
+ if test $HAVE_PYTHON = yes; then
+ AS_ECHO(["running $PYTHON -c 'import $1
+import sys
+sys.exit(0)'..."]) >&AS_MESSAGE_LOG_FD 2>&1
+ if $PYTHON -c 'import $1
+import sys
+sys.exit(0)' >&AS_MESSAGE_LOG_FD 2>&1; then
+ ovs_cv_py_[]AS_TR_SH([$1])=yes
+ fi
+ fi])])
+
+dnl Checks for Python modules needed by ovsdbmonitor.
+AC_DEFUN([OVS_CHECK_OVSDBMONITOR],
+ [OVS_CHECK_PYTHON_MODULE([PySide.QtCore])
+ OVS_CHECK_PYTHON_MODULE([PyQt4.QtCore])
+ OVS_CHECK_PYTHON_MODULE([twisted.conch.ssh])
+ OVS_CHECK_PYTHON_MODULE([twisted.internet])
+ OVS_CHECK_PYTHON_MODULE([twisted.application])
+ OVS_CHECK_PYTHON_MODULE([json])
+ OVS_CHECK_PYTHON_MODULE([zope.interface])
+ if (test $ovs_cv_py_PySide_QtCore = yes \
+ || test $ovs_cv_py_PyQt4_QtCore = yes) \
+ && test $ovs_cv_py_twisted_conch_ssh = yes \
+ && test $ovs_cv_py_twisted_internet = yes \
+ && test $ovs_cv_py_twisted_application = yes \
+ && test $ovs_cv_py_json = yes \
+ && test $ovs_cv_py_zope_interface = yes; then
+ BUILD_OVSDBMONITOR=yes
+ else
+ BUILD_OVSDBMONITOR=no
+ fi
+ AC_MSG_CHECKING([whether to build ovsdbmonitor])
+ AC_MSG_RESULT([$BUILD_OVSDBMONITOR])
+ AM_CONDITIONAL([BUILD_OVSDBMONITOR], [test $BUILD_OVSDBMONITOR = yes])])
+
+dnl Checks for missing python modules at build time
+AC_DEFUN([OVS_CHECK_PYTHON_COMPAT],
+ [OVS_CHECK_PYTHON_MODULE([uuid])
+ if test $ovs_cv_py_uuid = yes; then
+ INCLUDE_PYTHON_COMPAT=no
+ else
+ INCLUDE_PYTHON_COMPAT=yes
+ fi
+ AC_MSG_CHECKING([whether to add python/compat to PYTHONPATH])
+ AC_MSG_RESULT([$INCLUDE_PYTHON_COMPAT])
+ AM_CONDITIONAL([INCLUDE_PYTHON_COMPAT], [test $INCLUDE_PYTHON_COMPAT = yes])])
+
+# OVS_LINK2_IFELSE(SOURCE1, SOURCE2, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
+# -------------------------------------------------------------
+# Based on AC_LINK_IFELSE, but tries to link both SOURCE1 and SOURCE2
+# into a program.
+#
+# This macro is borrowed from acinclude.m4 in GNU PSPP, which has the
+# following license:
+#
+# Copyright (C) 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+#
+m4_define([OVS_LINK2_IFELSE],
+[m4_ifvaln([$1], [AC_LANG_CONFTEST([$1])])dnl
+mv conftest.$ac_ext conftest1.$ac_ext
+m4_ifvaln([$2], [AC_LANG_CONFTEST([$2])])dnl
+mv conftest.$ac_ext conftest2.$ac_ext
+rm -f conftest1.$ac_objext conftest2.$ac_objext conftest$ac_exeext
+ovs_link2='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest1.$ac_ext conftest2.$ac_ext $LIBS >&5'
+AS_IF([_AC_DO_STDERR($ovs_link2) && {
+ test -z "$ac_[]_AC_LANG_ABBREV[]_werror_flag" ||
+ test ! -s conftest.err
+ } && test -s conftest$ac_exeext && {
+ test "$cross_compiling" = yes ||
+ AS_TEST_X([conftest$ac_exeext])
+ }],
+ [$3],
+ [echo "$as_me: failed source file 1 of 2 was:" >&5
+sed 's/^/| /' conftest1.$ac_ext >&5
+echo "$as_me: failed source file 2 of 2 was:" >&5
+sed 's/^/| /' conftest2.$ac_ext >&5
+ $4])
+dnl Delete also the IPA/IPO (Inter Procedural Analysis/Optimization)
+dnl information created by the PGI compiler (conftest_ipa8_conftest.oo),
+dnl as it would interfere with the next link command.
+rm -rf conftest.dSYM conftest1.dSYM conftest2.dSYM
+rm -f core conftest.err conftest1.err conftest2.err
+rm -f conftest1.$ac_objext conftest2.$ac_objext conftest*_ipa8_conftest*.oo
+rm -f conftest$ac_exeext
+rm -f m4_ifval([$1], [conftest1.$ac_ext]) m4_ifval([$2], [conftest1.$ac_ext])[]dnl
+])# OVS_LINK2_IFELSE
+
+dnl Defines USE_LINKER_SECTIONS to 1 if the compiler supports putting
+dnl variables in sections with user-defined names and the linker
+dnl automatically defines __start_SECNAME and __stop_SECNAME symbols
+dnl that designate the start and end of the sections.
+AC_DEFUN([OVS_CHECK_LINKER_SECTIONS],
+ [AC_CACHE_CHECK(
+ [for user-defined linker section support],
+ [ovs_cv_use_linker_sections],
+ [OVS_LINK2_IFELSE(
+ [AC_LANG_SOURCE(
+ [int a __attribute__((__section__("mysection"))) = 1;
+ int b __attribute__((__section__("mysection"))) = 2;
+ int c __attribute__((__section__("mysection"))) = 3;])],
+ [AC_LANG_PROGRAM(
+ [#include <stdio.h>
+ extern int __start_mysection;
+ extern int __stop_mysection;],
+ [int n_ints = &__stop_mysection - &__start_mysection;
+ int *i;
+ for (i = &__start_mysection; i < &__start_mysection + n_ints; i++) {
+ printf("%d\n", *i);
+ }])],
+ [ovs_cv_use_linker_sections=yes],
+ [ovs_cv_use_linker_sections=no])])
+ if test $ovs_cv_use_linker_sections = yes; then
+ AC_DEFINE([USE_LINKER_SECTIONS], [1],
+ [Define to 1 if the compiler support putting variables
+ into sections with user-defined names and the linker
+ automatically defines __start_SECNAME and __stop_SECNAME
+ symbols that designate the start and end of the section.])
+ fi
+ AM_CONDITIONAL(
+ [USE_LINKER_SECTIONS], [test $ovs_cv_use_linker_sections = yes])])
+
+dnl Checks for groff.
+AC_DEFUN([OVS_CHECK_GROFF],
+ [AC_CACHE_CHECK(
+ [for groff],
+ [ovs_cv_groff],
+ [if (groff -v) >/dev/null 2>&1; then
+ ovs_cv_groff=yes
+ else
+ ovs_cv_groff=no
+ fi])
+ AM_CONDITIONAL([HAVE_GROFF], [test "$ovs_cv_groff" = yes])])
+
+dnl Checks for thread-local storage support.
+dnl
+dnl Checks whether the compiler and linker support the C11
+dnl thread_local macro from <threads.h>, and if so defines
+dnl HAVE_THREAD_LOCAL. If not, checks whether the compiler and linker
+dnl support the GCC __thread extension, and if so defines
+dnl HAVE___THREAD.
+AC_DEFUN([OVS_CHECK_TLS],
+ [AC_CACHE_CHECK(
+ [whether $CC has <threads.h> that supports thread_local],
+ [ovs_cv_thread_local],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([#include <threads.h>
+static thread_local int var;], [return var;])],
+ [ovs_cv_thread_local=yes],
+ [ovs_cv_thread_local=no])])
+ if test $ovs_cv_thread_local = yes; then
+ AC_DEFINE([HAVE_THREAD_LOCAL], [1],
+ [Define to 1 if the C compiler and linker supports the C11
+ thread_local matcro defined in <threads.h>.])
+ else
+ AC_CACHE_CHECK(
+ [whether $CC supports __thread],
+ [ovs_cv___thread],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([static __thread int var;], [return var;])],
+ [ovs_cv___thread=yes],
+ [ovs_cv___thread=no])])
+ if test $ovs_cv___thread = yes; then
+ AC_DEFINE([HAVE___THREAD], [1],
+ [Define to 1 if the C compiler and linker supports the
+ GCC __thread extenions.])
+ fi
+ fi])
+
+dnl OVS_CHECK_GCC4_ATOMICS
+dnl
+dnl Checks whether the compiler and linker support GCC 4.0+ atomic built-ins.
+dnl A compile-time only check is not enough because the compiler defers
+dnl unimplemented built-ins to libgcc, which sometimes also lacks
+dnl implementations.
+AC_DEFUN([OVS_CHECK_GCC4_ATOMICS],
+ [AC_CACHE_CHECK(
+ [whether $CC supports GCC 4.0+ atomic built-ins],
+ [ovs_cv_gcc4_atomics],
+ [AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[#include <stdlib.h>
+
+#define ovs_assert(expr) if (!(expr)) abort();
+#define TEST_ATOMIC_TYPE(TYPE) \
+ { \
+ TYPE x = 1; \
+ TYPE orig; \
+ \
+ __sync_synchronize(); \
+ ovs_assert(x == 1); \
+ \
+ __sync_synchronize(); \
+ x = 3; \
+ __sync_synchronize(); \
+ ovs_assert(x == 3); \
+ \
+ orig = __sync_fetch_and_add(&x, 1); \
+ ovs_assert(orig == 3); \
+ __sync_synchronize(); \
+ ovs_assert(x == 4); \
+ \
+ orig = __sync_fetch_and_sub(&x, 2); \
+ ovs_assert(orig == 4); \
+ __sync_synchronize(); \
+ ovs_assert(x == 2); \
+ \
+ orig = __sync_fetch_and_or(&x, 6); \
+ ovs_assert(orig == 2); \
+ __sync_synchronize(); \
+ ovs_assert(x == 6); \
+ \
+ orig = __sync_fetch_and_and(&x, 10); \
+ ovs_assert(orig == 6); \
+ __sync_synchronize(); \
+ ovs_assert(x == 2); \
+ \
+ orig = __sync_fetch_and_xor(&x, 10); \
+ ovs_assert(orig == 2); \
+ __sync_synchronize(); \
+ ovs_assert(x == 8); \
+ }]], [dnl
+TEST_ATOMIC_TYPE(char);
+TEST_ATOMIC_TYPE(unsigned char);
+TEST_ATOMIC_TYPE(signed char);
+TEST_ATOMIC_TYPE(short);
+TEST_ATOMIC_TYPE(unsigned short);
+TEST_ATOMIC_TYPE(int);
+TEST_ATOMIC_TYPE(unsigned int);
+TEST_ATOMIC_TYPE(long int);
+TEST_ATOMIC_TYPE(unsigned long int);
+TEST_ATOMIC_TYPE(long long int);
+TEST_ATOMIC_TYPE(unsigned long long int);
+])],
+ [ovs_cv_gcc4_atomics=yes],
+ [ovs_cv_gcc4_atomics=no])])
+ if test $ovs_cv_gcc4_atomics = yes; then
+ AC_DEFINE([HAVE_GCC4_ATOMICS], [1],
+ [Define to 1 if the C compiler and linker supports the GCC 4.0+
+ atomic built-ins.])
+ fi])
+
+dnl OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE(SIZE)
+dnl
+dnl Checks __atomic_always_lock_free(SIZE, 0)
+AC_DEFUN([OVS_CHECK_ATOMIC_ALWAYS_LOCK_FREE],
+ [AC_CACHE_CHECK(
+ [value of __atomic_always_lock_free($1)],
+ [ovs_cv_atomic_always_lock_free_$1],
+ [AC_COMPUTE_INT(
+ [ovs_cv_atomic_always_lock_free_$1],
+ [__atomic_always_lock_free($1, 0)],
+ [],
+ [ovs_cv_atomic_always_lock_free_$1=unsupported])])
+ if test ovs_cv_atomic_always_lock_free_$1 != unsupported; then
+ AC_DEFINE_UNQUOTED(
+ [ATOMIC_ALWAYS_LOCK_FREE_$1B],
+ [$ovs_cv_atomic_always_lock_free_$1],
+ [If the C compiler is GCC 4.7 or later, define to the return value of
+ __atomic_always_lock_free($1, 0). If the C compiler is not GCC or is
+ an older version of GCC, the value does not matter.])
+ fi])
+
+dnl OVS_CHECK_POSIX_AIO
+AC_DEFUN([OVS_CHECK_POSIX_AIO],
+ [AC_SEARCH_LIBS([aio_write], [rt])
+ AM_CONDITIONAL([HAVE_POSIX_AIO], [test "$ac_cv_search_aio_write" != no])])
projects / cascardo / ovs.git / blobdiff