X-Git-Url: http://git.cascardo.eti.br/?a=blobdiff_plain;f=m4%2Fopenvswitch.m4;h=fa85d3f300dd16e96f06b09a138a7eb11dbab87f;hb=8fb7d02686ed;hp=d65baba8c0644dd5e6d287e475cc2eb092e69d67;hpb=39fb08818bbd9c438dbf23caa89937c663451b5a;p=cascardo%2Fovs.git diff --git a/m4/openvswitch.m4 b/m4/openvswitch.m4 index d65baba8c..fa85d3f30 100644 --- a/m4/openvswitch.m4 +++ b/m4/openvswitch.m4 @@ -1,6 +1,6 @@ # -*- autoconf -*- -# Copyright (c) 2008, 2009 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. @@ -13,37 +13,44 @@ # 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) 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])]) + # 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 ;; @@ -53,13 +60,125 @@ AC_DEFUN([OVS_CHECK_NDEBUG], [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 "$VSTUDIO_CONFIG"]) +]) + dnl Checks for Netlink support. AC_DEFUN([OVS_CHECK_NETLINK], [AC_CHECK_HEADER([linux/netlink.h], [HAVE_NETLINK=yes], [HAVE_NETLINK=no], [#include - #include ]) AM_CONDITIONAL([HAVE_NETLINK], [test "$HAVE_NETLINK" = yes]) if test "$HAVE_NETLINK" = yes; then @@ -67,169 +186,406 @@ AC_DEFUN([OVS_CHECK_NETLINK], [Define to 1 if Netlink protocol is available.]) fi]) -dnl Checks for OpenSSL, if --enable-ssl is passed in. +dnl Checks for libcap-ng. +AC_DEFUN([OVS_CHECK_LIBCAPNG], + [AC_ARG_ENABLE( + [libcapng], + [AC_HELP_STRING([--disable-libcapng], [Disable Linux capability support])], + [case "${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 ${enableval} for --enable-ssl]) ;; esac], - [ssl=false]) - - if test "$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: + [ssl=check]) - $SSL_PKG_ERRORS + if test "$ssl" != false; then + AX_CHECK_OPENSSL( + [HAVE_OPENSSL=yes], + [HAVE_OPENSSL=no + if test "$ssl" = check; then + AC_MSG_WARN([Cannot find openssl: - OpenFlow connections over SSL will not be supported.])]) +$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]) - 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 - ], - [(void) __malloc_hook; - (void) __realloc_hook; - (void) __free_hook;])], - [ovs_cv_malloc_hooks=yes], - [ovs_cv_malloc_hooks=no])]) - if test $ovs_cv_malloc_hooks = yes; then - AC_DEFINE([HAVE_MALLOC_HOOKS], [1], - [Define to 1 if you have __malloc_hook, __realloc_hook, and - __free_hook in .]) - fi]) +dnl Checks for the directory in which to store the Open vSwitch database. +AC_DEFUN([OVS_CHECK_DBDIR], + [AC_ARG_WITH( + [dbdir], + AC_HELP_STRING([--with-dbdir=DIR], + [directory used for conf.db [[SYSCONFDIR/PACKAGE]]]), + [DBDIR=$withval], + [DBDIR='${sysconfdir}/${PACKAGE}']) + AC_SUBST([DBDIR])]) + +dnl 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 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 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 "$ovs_cv_path_tty_locks" = none; then - AC_MSG_ERROR([cannot find a directory for tty locks]) +dnl Checks for Python 2.x, x >= 7. +AC_DEFUN([OVS_CHECK_PYTHON], + [AC_CACHE_CHECK( + [for Python 2.x for x >= 7], + [ovs_cv_python], + [if test -n "$PYTHON"; then + ovs_cv_python=$PYTHON + else + ovs_cv_python=no + for binary in python python2.7; do + ovs_save_IFS=$IFS; IFS=$PATH_SEPARATOR + for dir in $PATH; do + IFS=$ovs_save_IFS + test -z "$dir" && dir=. + if test -x "$dir"/"$binary" && "$dir"/"$binary" -c 'import sys +if sys.hexversion >= 0x02070000 and sys.hexversion < 0x03000000: + sys.exit(0) +else: + sys.exit(1)'; then + ovs_cv_python=$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_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 - 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]) + 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 - if test "$NCURSES_CONFIG" = ""; then - AC_SEARCH_LIBS([tgetent], [ncurses], - [AC_CHECK_HEADERS([term.h curses.h], - [HAVE_CURSES=yes], - [HAVE_CURSES=no])]) + AM_CONDITIONAL([HAVE_PYTHON3], [test "$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 , 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 that supports thread_local], + [ovs_cv_thread_local], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM([#include +static thread_local int var;], [return var;])], + [ovs_cv_thread_local=yes], + [ovs_cv_thread_local=no])]) + if test $ovs_cv_thread_local = yes; then + AC_DEFINE([HAVE_THREAD_LOCAL], [1], + [Define to 1 if the C compiler and linker supports the C11 + thread_local matcro defined in .]) else - save_cflags=$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) + 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 $ovs_cv___thread = yes; then + AC_DEFINE([HAVE___THREAD], [1], + [Define to 1 if the C compiler and linker supports the + GCC __thread extenions.]) fi - fi - AM_CONDITIONAL([HAVE_CURSES], [test "$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.]) +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 + +#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])]) + ])