acinclude.m4
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# -*- autoconf -*-
# Copyright (c) 2008, 2009 The Board of Trustees of The Leland Stanford
# Junior University
#
# We are making the OpenFlow specification and associated documentation
# (Software) available for public use and benefit with the expectation
# that others will use, modify and enhance the Software and contribute
# those enhancements back to the community. However, since we would
# like to make the Software available for broadest use, with as few
# restrictions as possible permission is hereby granted, free of
# charge, to any person obtaining a copy of this Software to deal in
# the Software under the copyrights without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
#
# The name and trademarks of copyright holder(s) may NOT be used in
# advertising or publicity pertaining to the Software or any
# derivatives without specific, written prior permission.
dnl OFP_CHECK_LINUX(OPTION, VERSION, VARIABLE, CONDITIONAL)
dnl
dnl Configure linux kernel source tree
AC_DEFUN([OFP_CHECK_LINUX], [
AC_ARG_WITH([$1],
[AC_HELP_STRING([--with-$1=/path/to/linux-$2],
[Specify the linux $2 kernel module build envrionment and sources])],
[path="$withval"], [path=])dnl
if test -n "$path"; then
path=`eval echo "$path"`
AC_MSG_CHECKING([for $path directory])
if test -d "$path" && test -d "$path/build" ; then
AC_MSG_RESULT([yes])
if test -d "$path/source" ; then
$3=$path/build
$4=$path/source
else
$3=$path/build
$4=$path/build
fi
AC_SUBST($3)
AC_SUBST($4)
else
AC_MSG_RESULT([no])
AC_ERROR([source dir $path doesn't exist])
fi
AC_MSG_CHECKING([for $path kernel version])
patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KBLD26/Makefile"`
sublevel=`sed -n 's/^SUBLEVEL = //p' "$KBLD26/Makefile"`
AC_MSG_RESULT([2.$patchlevel.$sublevel])
if test "2.$patchlevel" != '$2'; then
AC_ERROR([Linux kernel source in $path is not version $2])
fi
if ! test -e $KBLD26/include/linux/version.h || \
! test -e $KBLD26/include/linux/autoconf.h; then
AC_MSG_ERROR([Linux kernel source in $path is not configured])
fi
m4_if($2, [2.6], [OFP_CHECK_LINUX26_COMPAT])
fi
AM_CONDITIONAL($5, test -n "$path")
])
dnl OFP_GREP_IFELSE(FILE, REGEX, IF-MATCH, IF-NO-MATCH)
dnl
dnl Greps FILE for REGEX. If it matches, runs IF-MATCH, otherwise IF-NO-MATCH.
AC_DEFUN([OFP_GREP_IFELSE], [
AC_MSG_CHECKING([whether $2 matches in $1])
grep '$2' $1 >/dev/null 2>&1
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
$3
;;
1)
AC_MSG_RESULT([no])
$4
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
])
dnl OFP_DEFINE(NAME)
dnl
dnl Defines NAME to 1 in kcompat.h.
AC_DEFUN([OFP_DEFINE], [
echo '#define $1 1' >> datapath/linux-2.6/kcompat.h.new
])
AC_DEFUN([OFP_CHECK_VETH], [
AC_MSG_CHECKING([whether to build veth module])
if test "$sublevel" = 18; then
AC_MSG_RESULT([yes])
AC_SUBST([BUILD_VETH], 1)
else
AC_MSG_RESULT([no])
fi
])
dnl OFP_CHECK_LINUX26_COMPAT
dnl
dnl Runs various Autoconf checks on the Linux 2.6 kernel source in
dnl the directory in $KSRC26.
AC_DEFUN([OFP_CHECK_LINUX26_COMPAT], [
rm -f datapath/linux-2.6/kcompat.h.new
mkdir -p datapath/linux-2.6
: > datapath/linux-2.6/kcompat.h.new
OFP_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [skb_transport_header],
[OFP_DEFINE([HAVE_SKBUFF_HEADER_HELPERS])])
OFP_GREP_IFELSE([$KSRC26/include/linux/skbuff.h], [raw],
[OFP_DEFINE([HAVE_MAC_RAW])])
OFP_GREP_IFELSE([$KSRC26/include/linux/skbuff.h],
[skb_copy_from_linear_data_offset],
[OFP_DEFINE([HAVE_SKB_COPY_FROM_LINEAR_DATA_OFFSET])])
OFP_GREP_IFELSE([$KSRC26/include/net/netlink.h], [NLA_NUL_STRING],
[OFP_DEFINE([HAVE_NLA_NUL_STRING])])
OFP_CHECK_VETH
if cmp -s datapath/linux-2.6/kcompat.h.new \
datapath/linux-2.6/kcompat.h >/dev/null 2>&1; then
rm datapath/linux-2.6/kcompat.h.new
else
mv datapath/linux-2.6/kcompat.h.new datapath/linux-2.6/kcompat.h
fi
])
dnl Checks for --enable-hw-tables and substitutes HW_TABLES to any
dnl requested hardware table modules.
AC_DEFUN([OFP_CHECK_HWTABLES],
[AC_ARG_ENABLE(
[hw-tables],
[AC_HELP_STRING([--enable-hw-tables=MODULE...],
[Configure and build the specified externally supplied
hardware table support modules])])
case "${enable_hw_tables}" in # (
yes)
AC_MSG_ERROR([--enable-hw-tables has a required argument])
;; # (
''|no)
hw_tables=
;; # (
*)
hw_tables=`echo "$enable_hw_tables" | sed 's/,/ /g'`
;;
esac
for d in $hw_tables; do
mk=datapath/hwtable_$d/Modules.mk
if test ! -e $srcdir/$mk; then
AC_MSG_ERROR([--enable-hw-tables=$d specified but $mk is missing])
fi
HW_TABLES="$HW_TABLES \$(top_srcdir)/$mk"
done
AC_SUBST(HW_TABLES)])
dnl Checks for --enable-hw-lib and substitutes BUILD_HW_LIBS and plat name
AC_DEFUN([OFP_CHECK_HWLIBS],
[AC_ARG_ENABLE(
[hw-lib],
[AC_HELP_STRING([--enable-hw-lib=PLATFORM],
[Configure and build the specified externally supplied
hardware library: lb4g, t2ref, scorref or nf2])])
case "${enable_hw_lib}" in # (
yes)
AC_MSG_ERROR([--enable-hw-lib has a required argument])
;; # (
''|no)
hw_lib=
NF2=no
LB4G=no
T2REF=no
SCORREF=no
BUILD_HW_LIBS=no
;; # (
nf2)
NF2=yes
LB4G=no
T2REF=no
SCORREF=no
hw_lib=$enable_hw_lib
BUILD_HW_LIBS=yes
;; # (
lb4g)
NF2=no
LB4G=yes
T2REF=no
SCORREF=no
hw_lib=$enable_hw_lib
BUILD_HW_LIBS=yes
;; # (
t2ref)
NF2=no
LB4G=no
T2REF=yes
SCORREF=no
hw_lib=$enable_hw_lib
BUILD_HW_LIBS=yes
;; # (
scorref)
NF2=no
LB4G=no
SCORREF=yes
T2REF=no
hw_lib=$enable_hw_lib
BUILD_HW_LIBS=yes
;; # (
*)
AC_MSG_ERROR([--enable-hw-lib: Unknown platform: ${enable_hw_lib}])
BUILD_HW_LIBS=no
;;
esac
if test $BUILD_HW_LIBS = yes; then
if test -e "$srcdir/hw-lib/automake.mk"; then
:
else
AC_MSG_ERROR([cannot configure HW libraries without "hw-lib" directory])
fi
AC_DEFINE([BUILD_HW_LIBS], [1],
[Whether the OpenFlow hardware libraries are available])
fi
if test $NF2 = yes; then
AC_DEFINE([NF2], [1],
[Support NetFPGA platform])
fi
if test $LB4G = yes; then
AC_DEFINE([LB4G], [1],
[Support Stanford-LB4G platform])
fi
if test $T2REF = yes; then
AC_DEFINE([T2REF], [1],
[Support Broadcom 56634 reference platform])
fi
if test $SCORREF = yes; then
AC_DEFINE([SCORREF], [1],
[Support Broadcom 56820 reference platform])
fi
AM_CONDITIONAL([NF2], [test $NF2 = yes])
AM_CONDITIONAL([LB4G], [test $LB4G = yes])
AM_CONDITIONAL([T2REF], [test $T2REF = yes])
AM_CONDITIONAL([SCORREF], [test $SCORREF = yes])
AM_CONDITIONAL([BUILD_HW_LIBS], [test $BUILD_HW_LIBS = yes])
AC_SUBST(HW_LIB)])
dnl Checks for net/if_packet.h.
AC_DEFUN([OFP_CHECK_IF_PACKET],
[AC_CHECK_HEADER([net/if_packet.h],
[HAVE_IF_PACKET=yes],
[HAVE_IF_PACKET=no])
AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
if test "$HAVE_IF_PACKET" = yes; then
AC_DEFINE([HAVE_IF_PACKET], [1],
[Define to 1 if net/if_packet.h is available.])
fi])
dnl Checks for dpkg-buildpackage. If this is available then we check
dnl that the Debian packaging is functional at "make distcheck" time.
AC_DEFUN([OFP_CHECK_DPKG_BUILDPACKAGE],
[AC_CHECK_PROG([HAVE_DPKG_BUILDPACKAGE], [dpkg-buildpackage], [yes], [no])
AM_CONDITIONAL([HAVE_DPKG_BUILDPACKAGE],
[test $HAVE_DPKG_BUILDPACKAGE = yes])])
dnl ----------------------------------------------------------------------
dnl These macros are from GNU PSPP, with the following original license:
dnl Copyright (C) 2005, 2006, 2007 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl OFP_CHECK_CC_OPTION([OPTION], [ACTION-IF-ACCEPTED], [ACTION-IF-REJECTED])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, execute ACTION-IF-ACCEPTED, otherwise ACTION-IF-REJECTED.
AC_DEFUN([OFP_CHECK_CC_OPTION],
[
m4_define([ofp_cv_name], [ofp_cv_[]m4_translit([$1], [-], [_])])dnl
AC_CACHE_CHECK([whether $CC accepts $1], [ofp_cv_name],
[ofp_save_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS $1"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM(,)], [ofp_cv_name[]=yes], [ofp_cv_name[]=no])
CFLAGS="$ofp_save_CFLAGS"])
if test $ofp_cv_name = yes; then
m4_if([$2], [], [;], [$2])
else
m4_if([$3], [], [:], [$3])
fi
])
dnl OFP_ENABLE_OPTION([OPTION])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, add it to CFLAGS.
dnl Example: OFP_ENABLE_OPTION([-Wdeclaration-after-statement])
AC_DEFUN([OFP_ENABLE_OPTION],
[OFP_CHECK_CC_OPTION([$1], [CFLAGS="$CFLAGS $1"])])
dnl ----------------------------------------------------------------------