mirror of
https://github.com/openvswitch/ovs
synced 2025-10-13 14:07:02 +00:00
189 lines
6.4 KiB
Plaintext
189 lines
6.4 KiB
Plaintext
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# -*- autoconf -*-
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# Copyright (c) 2008, 2009 Nicira Networks.
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#
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# Permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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dnl Checks for --disable-userspace.
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AC_DEFUN([OVS_CHECK_USERSPACE],
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[AC_ARG_ENABLE(
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[userspace],
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[AC_HELP_STRING([--disable-userspace],
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[Disable building userspace components.])],
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[case "${enableval}" in
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(yes) build_userspace=true ;;
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(no) build_userspace=false ;;
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(*) AC_MSG_ERROR([bad value ${enableval} for --enable-userspace]) ;;
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esac],
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[build_userspace=true])
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AM_CONDITIONAL([ENABLE_USERSPACE], [$build_userspace])])
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dnl OVS_CHECK_LINUX(OPTION, VERSION, VARIABLE, CONDITIONAL)
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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([$1],
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[AC_HELP_STRING([--with-$1=/path/to/linux-$2],
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[Specify the linux $2 kernel sources])],
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[path="$withval"], [path=])dnl
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if test -n "$path"; then
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path=`eval echo "$path"`
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AC_MSG_CHECKING([for $path directory])
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if test -d "$path"; then
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AC_MSG_RESULT([yes])
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$3=$path
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AC_SUBST($3)
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else
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AC_MSG_RESULT([no])
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AC_ERROR([source dir $path doesn't exist])
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fi
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AC_MSG_CHECKING([for $path kernel version])
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patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$path/Makefile"`
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sublevel=`sed -n 's/^SUBLEVEL = //p' "$path/Makefile"`
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AC_MSG_RESULT([2.$patchlevel.$sublevel])
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if test "2.$patchlevel" != '$2'; then
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AC_ERROR([Linux kernel source in $path is not version $2])
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fi
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if ! test -e "$path"/include/linux/version.h || \
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! test -e "$path"/include/linux/autoconf.h; then
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AC_MSG_ERROR([Linux kernel source in $path is not configured])
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fi
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m4_if($2, [2.6], [OVS_CHECK_LINUX26_COMPAT])
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fi
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AM_CONDITIONAL($4, test -n "$path")
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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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AC_DEFUN([OVS_GREP_IFELSE], [
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AC_MSG_CHECKING([whether $2 matches in $1])
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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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$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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])
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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 $1 1' >> datapath/linux-2.6/kcompat.h.new
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])
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AC_DEFUN([OVS_CHECK_VETH], [
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AC_MSG_CHECKING([whether to build veth module])
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if test "$sublevel" = 18; then
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AC_MSG_RESULT([yes])
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AC_SUBST([BUILD_VETH], 1)
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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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AC_DEFUN([OVS_CHECK_LOG2_H], [
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AC_MSG_CHECKING([for $KSRC26/include/linux/log2.h])
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if test -e $KSRC26/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_LINUX26_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 $KSRC26.
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AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [
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rm -f datapath/linux-2.6/kcompat.h.new
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mkdir -p datapath/linux-2.6
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: > datapath/linux-2.6/kcompat.h.new
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OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_transport_header],
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[OVS_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
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OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [raw],
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[OVS_DEFINE([HAVE_MAC_RAW])])
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OVS_GREP_IFELSE([$KSRC26/include/linux/skbuff.h],
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[skb_copy_from_linear_data_offset],
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[OVS_DEFINE([HAVE_SKB_COPY_FROM_LINEAR_DATA_OFFSET])])
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OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [NLA_NUL_STRING],
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[OVS_DEFINE([HAVE_NLA_NUL_STRING])])
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OVS_GREP_IFELSE([$KSRC26/include/linux/err.h], [ERR_CAST],
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[OVS_DEFINE([HAVE_ERR_CAST])])
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OVS_CHECK_LOG2_H
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OVS_CHECK_VETH
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if cmp -s datapath/linux-2.6/kcompat.h.new \
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datapath/linux-2.6/kcompat.h >/dev/null 2>&1; then
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rm datapath/linux-2.6/kcompat.h.new
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else
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mv datapath/linux-2.6/kcompat.h.new datapath/linux-2.6/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 ----------------------------------------------------------------------
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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 CFLAGS.
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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([$1], [CFLAGS="$CFLAGS $1"])])
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dnl ----------------------------------------------------------------------
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