mirror of
https://github.com/openvswitch/ovs
synced 2025-10-13 14:07:02 +00:00
d30e714ccb
On other platforms there is no benefit to linking against libpcap, because it is not used. Signed-off-by: Ben Pfaff <blp@nicira.com> CC: Ed Maste <emaste@freebsd.org>
491 lines
18 KiB
Plaintext
491 lines
18 KiB
Plaintext
# -*- autoconf -*-
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# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at:
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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dnl OVS_ENABLE_WERROR
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AC_DEFUN([OVS_ENABLE_WERROR],
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[AC_ARG_ENABLE(
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[Werror],
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[AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
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[], [enable_Werror=no])
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AC_CONFIG_COMMANDS_PRE(
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[if test "X$enable_Werror" = Xyes; then
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CFLAGS="$CFLAGS -Werror"
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fi])])
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dnl OVS_CHECK_LINUX
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dnl
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dnl Configure linux kernel source tree
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AC_DEFUN([OVS_CHECK_LINUX], [
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AC_ARG_WITH([linux],
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[AC_HELP_STRING([--with-linux=/path/to/linux],
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[Specify the Linux kernel build directory])])
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AC_ARG_WITH([linux-source],
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[AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
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[Specify the Linux kernel source directory
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(usually figured out automatically from build
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directory)])])
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# Deprecated equivalents to --with-linux, --with-linux-source.
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AC_ARG_WITH([l26])
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AC_ARG_WITH([l26-source])
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if test X"$with_linux" != X; then
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KBUILD=$with_linux
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elif test X"$with_l26" != X; then
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KBUILD=$with_l26
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AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
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else
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KBUILD=
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fi
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if test X"$KBUILD" != X; then
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if test X"$with_linux_source" != X; then
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KSRC=$with_linux_source
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elif test X"$with_l26_source" != X; then
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KSRC=$with_l26_source
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AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
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else
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KSRC=
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fi
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elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
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AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
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fi
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if test -n "$KBUILD"; then
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KBUILD=`eval echo "$KBUILD"`
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case $KBUILD in
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/*) ;;
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*) KBUILD=`pwd`/$KBUILD ;;
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esac
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# The build directory is what the user provided.
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# Make sure that it exists.
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AC_MSG_CHECKING([for Linux build directory])
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if test -d "$KBUILD"; then
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AC_MSG_RESULT([$KBUILD])
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AC_SUBST(KBUILD)
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else
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AC_MSG_RESULT([no])
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AC_ERROR([source dir $KBUILD doesn't exist])
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fi
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# Debian breaks kernel headers into "source" header and "build" headers.
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# We want the source headers, but $KBUILD gives us the "build" headers.
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# Use heuristics to find the source headers.
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AC_MSG_CHECKING([for Linux source directory])
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if test -n "$KSRC"; then
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KSRC=`eval echo "$KSRC"`
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case $KSRC in
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/*) ;;
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*) KSRC=`pwd`/$KSRC ;;
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esac
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if test ! -e $KSRC/include/linux/kernel.h; then
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AC_MSG_ERROR([$KSRC is not a kernel source directory])
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fi
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else
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KSRC=$KBUILD
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if test ! -e $KSRC/include/linux/kernel.h; then
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# Debian kernel build Makefiles tend to include a line of the form:
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# MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
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# First try to extract the source directory from this line.
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KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
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if test ! -e "$KSRC"/include/linux/kernel.h; then
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# Didn't work. Fall back to name-based heuristics that used to work.
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case `echo "$KBUILD" | sed 's,/*$,,'` in # (
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*/build)
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KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
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;; # (
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*)
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KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
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;;
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esac
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fi
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fi
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if test ! -e "$KSRC"/include/linux/kernel.h; then
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AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
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fi
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fi
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AC_MSG_RESULT([$KSRC])
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AC_MSG_CHECKING([for kernel version])
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version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
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patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
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sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
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if test X"$version" = X || test X"$patchlevel" = X; then
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AC_ERROR([cannot determine kernel version])
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elif test X"$sublevel" = X; then
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kversion=$version.$patchlevel
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else
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kversion=$version.$patchlevel.$sublevel
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fi
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AC_MSG_RESULT([$kversion])
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if test "$version" -ge 3; then
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: # Linux 3.x
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elif test "$version" = 2 && test "$patchlevel" -ge 6; then
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: # Linux 2.6.x
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else
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if test "$KBUILD" = "$KSRC"; then
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AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 2.6 or later is required])
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else
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AC_ERROR([Linux kernel in build tree $KBUILD (source tree $KSRC) is version $kversion, but version 2.6 or later is required])
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fi
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fi
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if (test ! -e "$KBUILD"/include/linux/version.h && \
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test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
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(test ! -e "$KBUILD"/include/linux/autoconf.h && \
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test ! -e "$KBUILD"/include/generated/autoconf.h); then
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AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
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fi
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OVS_CHECK_LINUX_COMPAT
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fi
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AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
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])
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dnl OVS_GREP_IFELSE(FILE, REGEX, [IF-MATCH], [IF-NO-MATCH])
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dnl
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dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
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dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
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dnl <REGEX> translated to uppercase.
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AC_DEFUN([OVS_GREP_IFELSE], [
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AC_MSG_CHECKING([whether $2 matches in $1])
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if test -f $1; then
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grep '$2' $1 >/dev/null 2>&1
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status=$?
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case $status in
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0)
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AC_MSG_RESULT([yes])
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m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
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;;
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1)
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AC_MSG_RESULT([no])
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$4
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;;
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*)
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AC_MSG_ERROR([grep exited with status $status])
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;;
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esac
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else
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AC_MSG_RESULT([file not found])
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$4
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fi
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])
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dnl OVS_DEFINE(NAME)
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dnl
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dnl Defines NAME to 1 in kcompat.h.
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AC_DEFUN([OVS_DEFINE], [
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echo '#define $1 1' >> datapath/linux/kcompat.h.new
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])
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AC_DEFUN([OVS_CHECK_LOG2_H], [
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AC_MSG_CHECKING([for $KSRC/include/linux/log2.h])
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if test -e $KSRC/include/linux/log2.h; then
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AC_MSG_RESULT([yes])
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OVS_DEFINE([HAVE_LOG2_H])
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else
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AC_MSG_RESULT([no])
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fi
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])
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dnl OVS_CHECK_LINUX_COMPAT
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dnl
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dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
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dnl the directory in $KBUILD.
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AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
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rm -f datapath/linux/kcompat.h.new
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mkdir -p datapath/linux
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: > datapath/linux/kcompat.h.new
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OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
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[OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
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OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
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OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
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OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
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OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
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OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
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OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
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OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
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OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
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[OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
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[rcu_read_lock_held])])
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# Check for the proto_data_valid member in struct sk_buff. The [^@]
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# is necessary because some versions of this header remove the
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# member but retain the kerneldoc comment that describes it (which
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# starts with @). The brackets must be doubled because of m4
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# quoting rules.
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
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[OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [raw],
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[OVS_DEFINE([HAVE_MAC_RAW])])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
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[OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
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[skb_copy_from_linear_data_offset])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
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[skb_reset_tail_pointer])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_transport_header],
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[OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
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OVS_GREP_IFELSE([$KSRC/include/linux/icmpv6.h], [icmp6_hdr],
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[OVS_DEFINE([HAVE_ICMP6_HDR])])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
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[OVS_DEFINE([HAVE_SKB_WARN_LRO])])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
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OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
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OVS_GREP_IFELSE([$KSRC/include/linux/string.h], [kmemdup], [],
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[OVS_GREP_IFELSE([$KSRC/include/linux/slab.h], [kmemdup])])
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OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
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[OVS_DEFINE([HAVE_BOOL_TYPE])])
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OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
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[OVS_DEFINE([HAVE_CSUM_TYPES])])
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OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
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OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
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OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [NLA_NUL_STRING])
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OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
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OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
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OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
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[OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
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OVS_CHECK_LOG2_H
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if cmp -s datapath/linux/kcompat.h.new \
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datapath/linux/kcompat.h >/dev/null 2>&1; then
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rm datapath/linux/kcompat.h.new
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else
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mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
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fi
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])
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dnl Checks for net/if_packet.h.
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AC_DEFUN([OVS_CHECK_IF_PACKET],
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[AC_CHECK_HEADER([net/if_packet.h],
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[HAVE_IF_PACKET=yes],
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[HAVE_IF_PACKET=no])
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AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
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if test "$HAVE_IF_PACKET" = yes; then
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AC_DEFINE([HAVE_IF_PACKET], [1],
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[Define to 1 if net/if_packet.h is available.])
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fi])
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dnl Checks for net/if_dl.h.
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dnl
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dnl (We use this as a proxy for checking whether we're building on FreeBSD.)
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AC_DEFUN([OVS_CHECK_IF_DL],
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[AC_CHECK_HEADER([net/if_dl.h],
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[HAVE_IF_DL=yes],
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[HAVE_IF_DL=no])
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AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
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if test "$HAVE_IF_DL" = yes; then
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AC_DEFINE([HAVE_IF_DL], [1],
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[Define to 1 if net/if_dl.h is available.])
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# On FreeBSD we use libpcap to access network devices.
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AC_SEARCH_LIBS([pcap_open_live], [pcap])
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fi])
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dnl Checks for buggy strtok_r.
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dnl
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dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
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dnl with optimization that can cause segfaults:
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dnl
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dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
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AC_DEFUN([OVS_CHECK_STRTOK_R],
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[AC_CACHE_CHECK(
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[whether strtok_r macro segfaults on some inputs],
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[ovs_cv_strtok_r_bug],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM([#include <stdio.h>
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#include <string.h>
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],
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[[char string[] = ":::";
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char *save_ptr = (char *) 0xc0ffee;
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char *token1, *token2;
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token1 = strtok_r(string, ":", &save_ptr);
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token2 = strtok_r(NULL, ":", &save_ptr);
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freopen ("/dev/null", "w", stdout);
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printf ("%s %s\n", token1, token2);
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return 0;
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]])],
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[ovs_cv_strtok_r_bug=no],
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[ovs_cv_strtok_r_bug=yes],
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[ovs_cv_strtok_r_bug=yes])])
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if test $ovs_cv_strtok_r_bug = yes; then
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AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
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[Define if strtok_r macro segfaults on some inputs])
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fi
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])
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dnl ----------------------------------------------------------------------
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dnl These macros are from GNU PSPP, with the following original license:
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dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl OVS_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
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dnl Check whether the given C compiler OPTION is accepted.
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dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
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AC_DEFUN([OVS_CHECK_CC_OPTION],
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[
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m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-], [_])])dnl
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AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
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[ovs_save_CFLAGS="$CFLAGS"
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CFLAGS="$CFLAGS $1"
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AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ovs_cv_name[]=yes], [ovs_cv_name[]=no])
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CFLAGS="$ovs_save_CFLAGS"])
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if test $ovs_cv_name = yes; then
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m4_if([$2], [], [:], [$2])
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else
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m4_if([$3], [], [:], [$3])
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fi
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])
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dnl OVS_ENABLE_OPTION([OPTION])
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dnl Check whether the given C compiler OPTION is accepted.
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dnl If so, add it to WARNING_FLAGS.
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dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
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AC_DEFUN([OVS_ENABLE_OPTION],
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[OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
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AC_SUBST([WARNING_FLAGS])])
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dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
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dnl Check whether the given C compiler OPTION is accepted.
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dnl If so, enable the given Automake CONDITIONAL.
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dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
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AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
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[OVS_CHECK_CC_OPTION(
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[$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
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AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
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dnl ----------------------------------------------------------------------
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dnl Check for too-old XenServer.
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AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
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[AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
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[if test -e /etc/redhat-release; then
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ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
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fi
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if test -z "$ovs_cv_xsversion"; then
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ovs_cv_xsversion=none
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fi])
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case $ovs_cv_xsversion in
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none)
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;;
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[[1-9]][[0-9]]* | dnl XenServer 10 or later
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[[6-9]]* | dnl XenServer 6 or later
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5.[[7-9]]* | dnl XenServer 5.7 or later
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5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
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5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
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5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
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;;
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|
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|
*)
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|
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.)])
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;;
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|
esac])
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|
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dnl OVS_MAKE_HAS_IF([if-true], [if-false])
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|
dnl
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|
dnl Checks whether make has the GNU make $(if condition,then,else) extension.
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|
dnl Runs 'if-true' if so, 'if-false' otherwise.
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|
AC_DEFUN([OVS_CHECK_MAKE_IF],
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|
[AC_CACHE_CHECK(
|
|
[whether ${MAKE-make} has GNU make \$(if) extension],
|
|
[ovs_cv_gnu_make_if],
|
|
[cat <<'EOF' > conftest.mk
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|
conftest.out:
|
|
echo $(if x,y,z) > conftest.out
|
|
.PHONY: all
|
|
EOF
|
|
rm -f conftest.out
|
|
AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} -f conftest.mk all:"]) >&AS_MESSAGE_LOG_FD 2>&1
|
|
${MAKE-make} -f conftest.mk conftest.out >&AS_MESSAGE_LOG_FD 2>&1
|
|
AS_ECHO(["$as_me:$LINENO: conftest.out contains:"]) >&AS_MESSAGE_LOG_FD 2>&1
|
|
cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
|
|
result=`cat conftest.out`
|
|
rm -f conftest.mk conftest.out
|
|
if test "X$result" = "Xy"; then
|
|
ovs_cv_gnu_make_if=yes
|
|
else
|
|
ovs_cv_gnu_make_if=no
|
|
fi])])
|
|
|
|
dnl OVS_CHECK_GNU_MAKE
|
|
dnl
|
|
dnl Checks whether make is GNU make (because Linux kernel Makefiles
|
|
dnl only work with GNU make).
|
|
AC_DEFUN([OVS_CHECK_GNU_MAKE],
|
|
[AC_CACHE_CHECK(
|
|
[whether ${MAKE-make} is GNU make],
|
|
[ovs_cv_gnu_make],
|
|
[rm -f conftest.out
|
|
AS_ECHO(["$as_me:$LINENO: invoking ${MAKE-make} --version:"]) >&AS_MESSAGE_LOG_FD 2>&1
|
|
${MAKE-make} --version >conftest.out 2>&1
|
|
cat conftest.out >&AS_MESSAGE_LOG_FD 2>&1
|
|
result=`cat conftest.out`
|
|
rm -f conftest.mk conftest.out
|
|
|
|
case $result in # (
|
|
GNU*) ovs_cv_gnu_make=yes ;; # (
|
|
*) ovs_cv_gnu_make=no ;;
|
|
esac])
|
|
AM_CONDITIONAL([GNU_MAKE], [test $ovs_cv_gnu_make = yes])])
|
|
|
|
dnl OVS_CHECK_SPARSE_TARGET
|
|
dnl
|
|
dnl The "cgcc" script from "sparse" isn't very good at detecting the
|
|
dnl target for which the code is being built. This helps it out.
|
|
AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
|
|
[AC_CACHE_CHECK(
|
|
[target hint for cgcc],
|
|
[ac_cv_sparse_target],
|
|
[AS_CASE([`$CC -dumpmachine 2>/dev/null`],
|
|
[i?86-* | athlon-*], [ac_cv_sparse_target=x86],
|
|
[x86_64-*], [ac_cv_sparse_target=x86_64],
|
|
[ac_cv_sparse_target=other])])
|
|
AS_CASE([$ac_cv_sparse_target],
|
|
[x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
|
|
[x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
|
|
[SPARSEFLAGS= CGCCFLAGS=])
|
|
AC_SUBST([SPARSEFLAGS])
|
|
AC_SUBST([CGCCFLAGS])])
|
|
|
|
dnl OVS_ENABLE_SPARSE
|
|
AC_DEFUN([OVS_ENABLE_SPARSE],
|
|
[AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
|
|
AC_REQUIRE([OVS_CHECK_MAKE_IF])
|
|
: ${SPARSE=sparse}
|
|
AC_SUBST([SPARSE])
|
|
AC_CONFIG_COMMANDS_PRE(
|
|
[if test $ovs_cv_gnu_make_if = yes; then
|
|
CC='$(if $(C),REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS)" cgcc $(CGCCFLAGS),'"$CC"')'
|
|
fi])])
|