# -*- autoconf -*-
-# Copyright (c) 2008, 2009, 2010 Nicira Networks.
+# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
+#
+m4_include([m4/compat.at])
dnl Checks for --enable-coverage and updates CFLAGS and LDFLAGS appropriately.
AC_DEFUN([OVS_CHECK_COVERAGE],
[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|yes) coverage=true ;;
+ (yes) coverage=true ;;
(no) coverage=false ;;
(*) AC_MSG_ERROR([bad value ${enableval} for --enable-coverage]) ;;
esac],
[coverage=false])
if $coverage; then
- CFLAGS="$CFLAGS -O0 --coverage"
- LDFLAGS="$LDFLAGS --coverage"
+ # Autoconf by default puts "-g -O2" in CFLAGS. We need to remove the -O2
+ # option for coverage to be useful. This does it without otherwise
+ # interfering with anything that the user might have put there.
+ old_CFLAGS=$CFLAGS
+ CFLAGS=
+ for option in $old_CFLAGS; do
+ case $option in
+ (-O2) ;;
+ (*) CFLAGS="$CFLAGS $option" ;;
+ esac
+ done
+
+ OVS_CFLAGS="$OVS_CFLAGS --coverage"
+ OVS_LDFLAGS="$OVS_LDFLAGS --coverage"
fi])
dnl Checks for --enable-ndebug and defines NDEBUG if it is specified.
AC_DEFUN([OVS_CHECK_NDEBUG],
[AC_ARG_ENABLE(
[ndebug],
- [AC_HELP_STRING([--enable-ndebug],
+ [AC_HELP_STRING([--enable-ndebug],
[Disable debugging features for max performance])],
[case "${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 "$ESX" = yes; then
+ AC_DEFINE([ESX], [1], [Define to 1 if building on ESX.])
+ fi])
+
+dnl Checks for MSVC x64 compiler.
+AC_DEFUN([OVS_CHECK_WIN64],
+ [AC_CACHE_CHECK(
+ [for MSVC x64 compiler],
+ [cl_cv_x64],
+ [dnl "cl" writes x64 output to stdin:
+ if (cl) 2>&1 | grep 'x64' >/dev/null 2>&1; then
+ cl_cv_x64=yes
+ MSVC64_LDFLAGS=" /MACHINE:X64 "
+ else
+ cl_cv_x64=no
+ MSVC64_LDFLAGS=""
+ fi])
+ AC_SUBST([MSVC64_LDFLAGS])
+])
+
+dnl Checks for WINDOWS.
+AC_DEFUN([OVS_CHECK_WIN32],
+ [AC_CHECK_HEADER([windows.h],
+ [WIN32=yes],
+ [WIN32=no])
+ AM_CONDITIONAL([WIN32], [test "$WIN32" = yes])
+ if test "$WIN32" = yes; then
+ AC_ARG_WITH([pthread],
+ [AS_HELP_STRING([--with-pthread=DIR],
+ [root of the pthread-win32 directory])],
+ [
+ case "$withval" in
+ "" | y | ye | yes | n | no)
+ AC_MSG_ERROR([Invalid --with-pthread value])
+ ;;
+ *)
+ if (cl) 2>&1 | grep 'x64' >/dev/null 2>&1; then
+ cl_cv_x64=yes
+ else
+ cl_cv_x64=no
+ fi
+ if test "$cl_cv_x64" = yes; then
+ PTHREAD_WIN32_DIR=$withval/lib/x64
+ PTHREAD_WIN32_DIR_DLL=/$(echo ${withval} | ${SED} -e 's/://')/dll/x64
+ PTHREAD_WIN32_DIR_DLL_WIN_FORM=$withval/dll/x64
+ else
+ PTHREAD_WIN32_DIR=$withval/lib/x86
+ PTHREAD_WIN32_DIR_DLL=/$(echo ${withval} | ${SED} -e 's/://')/dll/x86
+ PTHREAD_WIN32_DIR_DLL_WIN_FORM=$withval/dll/x86
+ fi
+ PTHREAD_INCLUDES=-I$withval/include
+ PTHREAD_LDFLAGS=-L$PTHREAD_WIN32_DIR
+ PTHREAD_LIBS="-lpthreadVC2"
+ AC_SUBST([PTHREAD_WIN32_DIR_DLL_WIN_FORM])
+ AC_SUBST([PTHREAD_WIN32_DIR_DLL])
+ AC_SUBST([PTHREAD_INCLUDES])
+ AC_SUBST([PTHREAD_LDFLAGS])
+ AC_SUBST([PTHREAD_LIBS])
+ ;;
+ esac
+ ], [
+ AC_MSG_ERROR([pthread directory not specified])
+ ]
+ )
+ AC_ARG_WITH([debug],
+ [AS_HELP_STRING([--with-debug],
+ [Build without compiler optimizations])],
+ [
+ MSVC_CFLAGS="-O0"
+ AC_SUBST([MSVC_CFLAGS])
+ ], [
+ MSVC_CFLAGS="-O2"
+ AC_SUBST([MSVC_CFLAGS])
+ ]
+ )
+
+ AC_DEFINE([WIN32], [1], [Define to 1 if building on WIN32.])
+ AH_BOTTOM([#ifdef WIN32
+#include "include/windows/windefs.h"
+#endif])
+ fi])
+
+dnl OVS_CHECK_WINDOWS
+dnl
+dnl Configure Visual Studio solution build
+AC_DEFUN([OVS_CHECK_VISUAL_STUDIO_DDK], [
+AC_ARG_WITH([vstudiotarget],
+ [AS_HELP_STRING([--with-vstudiotarget=target_type],
+ [Target type: Debug/Release])],
+ [
+ case "$withval" in
+ "Release") ;;
+ "Debug") ;;
+ *) AC_MSG_ERROR([No valid Visual Studio configuration found]) ;;
+ esac
+
+ VSTUDIO_CONFIG=$withval
+ ], [
+ VSTUDIO_CONFIG=
+ ]
+ )
+
+ AC_SUBST([VSTUDIO_CONFIG])
+ AC_DEFINE([VSTUDIO_DDK], [1], [System uses the Visual Studio build target.])
+ AM_CONDITIONAL([VSTUDIO_DDK], [test -n "$VSTUDIO_CONFIG"])
+])
+
dnl Checks for Netlink support.
AC_DEFUN([OVS_CHECK_NETLINK],
[AC_CHECK_HEADER([linux/netlink.h],
[HAVE_NETLINK=yes],
[HAVE_NETLINK=no],
[#include <sys/socket.h>
- #include <linux/types.h>
])
AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes])
if test "$HAVE_NETLINK" = yes; then
[Define to 1 if Netlink protocol is available.])
fi])
-dnl Checks for OpenSSL, if --enable-ssl is passed in.
+dnl Checks for libcap-ng.
+AC_DEFUN([OVS_CHECK_LIBCAPNG],
+ [AC_ARG_ENABLE(
+ [libcapng],
+ [AC_HELP_STRING([--disable-libcapng], [Disable Linux capability support])],
+ [case "${enableval}" in
+ (yes) libcapng=true ;;
+ (no) libcapng=false ;;
+ (*) AC_MSG_ERROR([bad value ${enableval} for --enable-libcapng]) ;;
+ esac],
+ [libcapng=check])
+
+ if test "$libcapng" != false; then
+ AC_CHECK_LIB([cap-ng], [capng_clear], [HAVE_LIBCAPNG=yes])
+
+ if test "$HAVE_LIBCAPNG" != yes; then
+ if test "$libcapng" = true ; then
+ AC_MSG_ERROR([libcap-ng support requested, but not found])
+ fi
+ if test "$libcapng" = check ; then
+ AC_MSG_WARN([cannot find libcap-ng.
+--user option will not be supported on Linux.
+(you may use --disable-libcapng to suppress this warning). ])
+ fi
+ fi
+ fi
+
+ AC_SUBST([HAVE_LIBCAPNG])
+ AM_CONDITIONAL([HAVE_LIBCAPNG], [test "$HAVE_LIBCAPNG" = yes])
+ if test "$HAVE_LIBCAPNG" = yes; then
+ AC_DEFINE([HAVE_LIBCAPNG], [1],
+ [Define to 1 if libcap-ng is available.])
+ CAPNG_LDADD="-lcap-ng"
+ AC_SUBST([CAPNG_LDADD])
+ fi])
+
+dnl Checks for OpenSSL.
AC_DEFUN([OVS_CHECK_OPENSSL],
[AC_ARG_ENABLE(
[ssl],
- [AC_HELP_STRING([--enable-ssl],
- [Enable ssl support (requires libssl)])],
+ [AC_HELP_STRING([--disable-ssl], [Disable OpenSSL support])],
[case "${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],
+ if test "$ssl" != false; then
+ AX_CHECK_OPENSSL(
[HAVE_OPENSSL=yes],
[HAVE_OPENSSL=no
- AC_MSG_WARN([Cannot find libssl:
+ if test "$ssl" = check; then
+ AC_MSG_WARN([Cannot find openssl:
$SSL_PKG_ERRORS
-OpenFlow connections over SSL will not be supported.])])
+OpenFlow connections over SSL will not be supported.
+(You may use --disable-ssl to suppress this warning.)])
+ else
+ AC_MSG_ERROR([Cannot find openssl (use --disable-ssl to configure without SSL support)])
+ fi])
else
HAVE_OPENSSL=no
fi
dnl Checks for libraries needed by lib/socket-util.c.
AC_DEFUN([OVS_CHECK_SOCKET_LIBS],
[AC_CHECK_LIB([socket], [connect])
- AC_SEARCH_LIBS([gethostbyname], [resolv], [RESOLVER_LIBS=-lresolv])])
+ AC_SEARCH_LIBS([gethostbyname], [resolv])])
dnl Checks for the directory in which to store the PKI.
AC_DEFUN([OVS_CHECK_PKIDIR],
[AC_ARG_WITH(
- [pkidir],
- AC_HELP_STRING([--with-pkidir=DIR],
- [PKI hierarchy directory [[DATADIR/openvswitch/pki]]]),
+ [pkidir],
+ AC_HELP_STRING([--with-pkidir=DIR],
+ [PKI hierarchy directory [[LOCALSTATEDIR/lib/openvswitch/pki]]]),
[PKIDIR=$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 __malloc_hook, etc., supported by glibc.
-AC_DEFUN([OVS_CHECK_MALLOC_HOOKS],
- [AC_CACHE_CHECK(
- [whether libc supports hooks for malloc and related functions],
- [ovs_cv_malloc_hooks],
- [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 $ovs_cv_malloc_hooks = yes; then
- AC_DEFINE([HAVE_MALLOC_HOOKS], [1],
- [Define to 1 if you have __malloc_hook, __realloc_hook, and
- __free_hook in <malloc.h>.])
- fi])
+dnl Checks for the directory in which to store the Open vSwitch database.
+AC_DEFUN([OVS_CHECK_DBDIR],
+ [AC_ARG_WITH(
+ [dbdir],
+ AC_HELP_STRING([--with-dbdir=DIR],
+ [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]),
+ [DBDIR=$withval],
+ [DBDIR='${sysconfdir}/${PACKAGE}'])
+ AC_SUBST([DBDIR])])
-dnl Checks for valgrind/valgrind.h.
-AC_DEFUN([OVS_CHECK_VALGRIND],
- [AC_CHECK_HEADERS([valgrind/valgrind.h])])
+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 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 "$HAVE_LINUX_VT_H" = yes; then
- AC_DEFINE([HAVE_LINUX_VT_H], [1],
- [Define to 1 if linux/vt.h is available.])
- fi])
+dnl Defines HAVE_PERF_EVENT if linux/perf_event.h is found.
+AC_DEFUN([OVS_CHECK_PERF_EVENT],
+ [AC_CHECK_HEADERS([linux/perf_event.h])])
-dnl Checks for libpcre.
-dnl
-dnl ovsdb wants any reasonable version of libpcre (6.6 is what
-dnl XenServer 5.5 has).
-dnl
-dnl ezio-term wants libpcre that supports the PCRE_PARTIAL feature,
-dnl which is libpcre 7.2 or later.
-AC_DEFUN([OVS_CHECK_PCRE],
- [dnl Make sure that pkg-config is installed.
- m4_pattern_forbid([PKG_CHECK_MODULES])
- HAVE_PCRE=no
- HAVE_PCRE_PARTIAL=no
- PKG_CHECK_MODULES([PCRE], [libpcre >= 6.6],
- [HAVE_PCRE=yes
- PKG_CHECK_EXISTS([libpcre >= 7.2], [HAVE_PCRE_PARTIAL=yes])])
- AM_CONDITIONAL([HAVE_PCRE], [test "$HAVE_PCRE" = yes])
- AM_CONDITIONAL([HAVE_PCRE_PARTIAL], [test "$HAVE_PCRE_PARTIAL" = yes])
- if test "$HAVE_PCRE" = yes; then
- AC_DEFINE([HAVE_PCRE], [1], [Define to 1 if libpcre is installed.])
- fi])
+dnl Checks for valgrind/valgrind.h.
+AC_DEFUN([OVS_CHECK_VALGRIND],
+ [AC_CHECK_HEADERS([valgrind/valgrind.h])])
-dnl Checks for Python 2.x, x >= 4.
+dnl Checks for Python 2.x, x >= 7.
AC_DEFUN([OVS_CHECK_PYTHON],
[AC_CACHE_CHECK(
- [for Python 2.x for x >= 4],
+ [for Python 2.x for x >= 7],
[ovs_cv_python],
[if test -n "$PYTHON"; then
ovs_cv_python=$PYTHON
else
ovs_cv_python=no
- for binary in python python2.4 python2.5; do
+ for binary in python python2.7; do
ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for dir in $PATH; do
IFS=$ovs_save_IFS
test -z "$dir" && dir=.
- if test -x $dir/$binary && $dir/$binary -c 'import sys
-if sys.hexversion >= 0x02040000 and sys.hexversion < 0x03000000:
+ if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
+if sys.hexversion >= 0x02070000 and sys.hexversion < 0x03000000:
sys.exit(0)
else:
sys.exit(1)'; then
fi
done
done
+ if test $ovs_cv_python != no; then
+ if test -x "$ovs_cv_python" && ! "$ovs_cv_python" -c 'import six' >/dev/null 2>&1; then
+ ovs_cv_python=no
+ AC_MSG_WARN([Missing Python six library.])
+ fi
+ fi
fi])
AC_SUBST([HAVE_PYTHON])
AM_MISSING_PROG([PYTHON], [python])
HAVE_PYTHON=no
fi
AM_CONDITIONAL([HAVE_PYTHON], [test "$HAVE_PYTHON" = yes])])
+
+dnl Checks for Python 3.x, x >= 4.
+AC_DEFUN([OVS_CHECK_PYTHON3],
+ [AC_CACHE_CHECK(
+ [for Python 3.x for x >= 4],
+ [ovs_cv_python3],
+ [if test -n "$PYTHON3"; then
+ ovs_cv_python3=$PYTHON3
+ else
+ ovs_cv_python3=no
+ for binary in python3 python3.4; do
+ ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+ for dir in $PATH; do
+ IFS=$ovs_save_IFS
+ test -z "$dir" && dir=.
+ if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys
+if sys.hexversion >= 0x03040000 and sys.hexversion < 0x04000000:
+ sys.exit(0)
+else:
+ sys.exit(1)'; then
+ ovs_cv_python3=$dir/$binary
+ break 2
+ fi
+ done
+ done
+ if test $ovs_cv_python != no; then
+ if test -x "$ovs_cv_python" && ! "$ovs_cv_python" -c 'import six' >/dev/null 2>&1; then
+ ovs_cv_python=no
+ AC_MSG_WARN([Missing Python six library.])
+ fi
+ fi
+ fi])
+ AC_SUBST([HAVE_PYTHON3])
+ AM_MISSING_PROG([PYTHON3], [python3])
+ if test $ovs_cv_python3 != no; then
+ PYTHON3=$ovs_cv_python3
+ HAVE_PYTHON3=yes
+ else
+ HAVE_PYTHON3=no
+ fi
+ AM_CONDITIONAL([HAVE_PYTHON3], [test "$HAVE_PYTHON3" = yes])])
+
+
+dnl Checks for dot.
+AC_DEFUN([OVS_CHECK_FLAKE8],
+ [AC_CACHE_CHECK(
+ [for flake8],
+ [ovs_cv_flake8],
+ [if flake8 --version >/dev/null 2>&1; then
+ ovs_cv_flake8=yes
+ else
+ ovs_cv_flake8=no
+ fi])
+ AM_CONDITIONAL([HAVE_FLAKE8], [test "$ovs_cv_flake8" = 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 "$ovs_cv_dot" = yes])])
+
+dnl Checks for groff.
+AC_DEFUN([OVS_CHECK_GROFF],
+ [AC_CACHE_CHECK(
+ [for groff],
+ [ovs_cv_groff],
+ [if (groff -v) >/dev/null 2>&1; then
+ ovs_cv_groff=yes
+ else
+ ovs_cv_groff=no
+ fi])
+ AM_CONDITIONAL([HAVE_GROFF], [test "$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_ATOMIC_LIBS
+dnl
+dnl Check to see if -latomic is need for GCC atomic built-ins.
+AC_DEFUN([OVS_CHECK_ATOMIC_LIBS],
+ [AC_SEARCH_LIBS([__atomic_load_8], [atomic])])
+
+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])])
+
+dnl OVS_CHECK_INCLUDE_NEXT
+AC_DEFUN([OVS_CHECK_INCLUDE_NEXT],
+ [AC_REQUIRE([gl_CHECK_NEXT_HEADERS])
+ gl_CHECK_NEXT_HEADERS([$1])])
+
+dnl OVS_CHECK_PRAGMA_MESSAGE
+AC_DEFUN([OVS_CHECK_PRAGMA_MESSAGE],
+ [AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
+ [[_Pragma("message(\"Checking for pragma message\")")
+ ]])],
+ [AC_DEFINE(HAVE_PRAGMA_MESSAGE,1,[Define if compiler supports #pragma
+ message directive])])
+ ])
projects / cascardo / ovs.git / blobdiff