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acinclude.m4
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acinclude.m4
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# -*- autoconf -*-
# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Nicira, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at:
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# 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.
dnl OVS_ENABLE_WERROR
AC_DEFUN([OVS_ENABLE_WERROR],
[AC_ARG_ENABLE(
[Werror],
[AC_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
[], [enable_Werror=no])
AC_CONFIG_COMMANDS_PRE(
[if test "X$enable_Werror" = Xyes; then
OVS_CFLAGS="$OVS_CFLAGS -Werror"
fi])
# Unless --enable-Werror is specified, report but do not fail the build
# for errors reported by flake8.
if test "X$enable_Werror" = Xyes; then
FLAKE8_WERROR=
else
FLAKE8_WERROR=-
fi
AC_SUBST([FLAKE8_WERROR])])
dnl OVS_CHECK_LINUX
dnl
dnl Configure linux kernel source tree
AC_DEFUN([OVS_CHECK_LINUX], [
AC_ARG_WITH([linux],
[AC_HELP_STRING([--with-linux=/path/to/linux],
[Specify the Linux kernel build directory])])
AC_ARG_WITH([linux-source],
[AC_HELP_STRING([--with-linux-source=/path/to/linux-source],
[Specify the Linux kernel source directory
(usually figured out automatically from build
directory)])])
# Deprecated equivalents to --with-linux, --with-linux-source.
AC_ARG_WITH([l26])
AC_ARG_WITH([l26-source])
if test X"$with_linux" != X; then
KBUILD=$with_linux
elif test X"$with_l26" != X; then
KBUILD=$with_l26
AC_MSG_WARN([--with-l26 is deprecated, please use --with-linux instead])
else
KBUILD=
fi
if test X"$KBUILD" != X; then
if test X"$with_linux_source" != X; then
KSRC=$with_linux_source
elif test X"$with_l26_source" != X; then
KSRC=$with_l26_source
AC_MSG_WARN([--with-l26-source is deprecated, please use --with-linux-source instead])
else
KSRC=
fi
elif test X"$with_linux_source" != X || test X"$with_l26_source" != X; then
AC_MSG_ERROR([Linux source directory may not be specified without Linux build directory])
fi
if test -n "$KBUILD"; then
KBUILD=`eval echo "$KBUILD"`
case $KBUILD in
/*) ;;
*) KBUILD=`pwd`/$KBUILD ;;
esac
# The build directory is what the user provided.
# Make sure that it exists.
AC_MSG_CHECKING([for Linux build directory])
if test -d "$KBUILD"; then
AC_MSG_RESULT([$KBUILD])
AC_SUBST(KBUILD)
else
AC_MSG_RESULT([no])
AC_ERROR([source dir $KBUILD doesn't exist])
fi
# Debian breaks kernel headers into "source" header and "build" headers.
# We want the source headers, but $KBUILD gives us the "build" headers.
# Use heuristics to find the source headers.
AC_MSG_CHECKING([for Linux source directory])
if test -n "$KSRC"; then
KSRC=`eval echo "$KSRC"`
case $KSRC in
/*) ;;
*) KSRC=`pwd`/$KSRC ;;
esac
if test ! -e $KSRC/include/linux/kernel.h; then
AC_MSG_ERROR([$KSRC is not a kernel source directory])
fi
else
KSRC=$KBUILD
if test ! -e $KSRC/include/linux/kernel.h; then
# Debian kernel build Makefiles tend to include a line of the form:
# MAKEARGS := -C /usr/src/linux-headers-3.2.0-1-common O=/usr/src/linux-headers-3.2.0-1-486
# First try to extract the source directory from this line.
KSRC=`sed -n 's/.*-C \([[^ ]]*\).*/\1/p' "$KBUILD"/Makefile`
if test ! -e "$KSRC"/include/linux/kernel.h; then
# Didn't work. Fall back to name-based heuristics that used to work.
case `echo "$KBUILD" | sed 's,/*$,,'` in # (
*/build)
KSRC=`echo "$KBUILD" | sed 's,/build/*$,/source,'`
;; # (
*)
KSRC=`(cd $KBUILD && pwd -P) | sed 's,-[[^-]]*$,-common,'`
;;
esac
fi
fi
if test ! -e "$KSRC"/include/linux/kernel.h; then
AC_MSG_ERROR([cannot find source directory (please use --with-linux-source)])
fi
fi
AC_MSG_RESULT([$KSRC])
AC_MSG_CHECKING([for kernel version])
version=`sed -n 's/^VERSION = //p' "$KSRC/Makefile"`
patchlevel=`sed -n 's/^PATCHLEVEL = //p' "$KSRC/Makefile"`
sublevel=`sed -n 's/^SUBLEVEL = //p' "$KSRC/Makefile"`
if test X"$version" = X || test X"$patchlevel" = X; then
AC_ERROR([cannot determine kernel version])
elif test X"$sublevel" = X; then
kversion=$version.$patchlevel
else
kversion=$version.$patchlevel.$sublevel
fi
AC_MSG_RESULT([$kversion])
if test "$version" -ge 4; then
if test "$version" = 4 && test "$patchlevel" -le 13; then
: # Linux 4.x
else
AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version newer than 4.13.x is not supported (please refer to the FAQ for advice)])
fi
elif test "$version" = 3 && test "$patchlevel" -ge 10; then
: # Linux 3.x
else
AC_ERROR([Linux kernel in $KBUILD is version $kversion, but version 3.10 or later is required])
fi
if (test ! -e "$KBUILD"/include/linux/version.h && \
test ! -e "$KBUILD"/include/generated/uapi/linux/version.h)|| \
(test ! -e "$KBUILD"/include/linux/autoconf.h && \
test ! -e "$KBUILD"/include/generated/autoconf.h); then
AC_MSG_ERROR([Linux kernel source in $KBUILD is not configured])
fi
OVS_CHECK_LINUX_COMPAT
fi
AM_CONDITIONAL(LINUX_ENABLED, test -n "$KBUILD")
])
dnl OVS_CHECK_LINUX_TC
dnl
dnl Configure Linux tc compat.
AC_DEFUN([OVS_CHECK_LINUX_TC], [
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/pkt_cls.h>], [
int x = TCA_FLOWER_KEY_IP_TTL_MASK;
])],
[AC_DEFINE([HAVE_TCA_FLOWER_KEY_IP_TTL_MASK], [1],
[Define to 1 if TCA_FLOWER_KEY_IP_TTL_MASK is avaiable.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/tc_act/tc_vlan.h>], [
int x = TCA_VLAN_PUSH_VLAN_PRIORITY;
])],
[AC_DEFINE([HAVE_TCA_VLAN_PUSH_VLAN_PRIORITY], [1],
[Define to 1 if TCA_VLAN_PUSH_VLAN_PRIORITY is avaiable.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/tc_act/tc_tunnel_key.h>], [
int x = TCA_TUNNEL_KEY_ENC_DST_PORT;
])],
[AC_DEFINE([HAVE_TCA_TUNNEL_KEY_ENC_DST_PORT], [1],
[Define to 1 if TCA_TUNNEL_KEY_ENC_DST_PORT is avaiable.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([#include <linux/tc_act/tc_pedit.h>], [
int x = TCA_PEDIT_KEY_EX_HDR_TYPE_UDP;
])],
[AC_DEFINE([HAVE_TCA_PEDIT_KEY_EX_HDR_TYPE_UDP], [1],
[Define to 1 if TCA_PEDIT_KEY_EX_HDR_TYPE_UDP is avaiable.])])
])
dnl OVS_CHECK_DPDK
dnl
dnl Configure DPDK source tree
AC_DEFUN([OVS_CHECK_DPDK], [
AC_ARG_WITH([dpdk],
[AC_HELP_STRING([--with-dpdk=/path/to/dpdk],
[Specify the DPDK build directory])],
[have_dpdk=true])
AC_MSG_CHECKING([whether dpdk datapath is enabled])
if test "$have_dpdk" != true || test "$with_dpdk" = no; then
AC_MSG_RESULT([no])
DPDKLIB_FOUND=false
else
AC_MSG_RESULT([yes])
case "$with_dpdk" in
yes)
DPDK_AUTO_DISCOVER="true"
PKG_CHECK_MODULES([DPDK], [libdpdk],
[DPDK_INCLUDE="$DPDK_CFLAGS"],
[DPDK_INCLUDE="-I/usr/local/include/dpdk -I/usr/include/dpdk"])
;;
*)
DPDK_AUTO_DISCOVER="false"
DPDK_INCLUDE_PATH="$with_dpdk/include"
# If 'with_dpdk' is passed install directory, point to headers
# installed in $DESTDIR/$prefix/include/dpdk
if test -e "$DPDK_INCLUDE_PATH/rte_config.h"; then
DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH"
elif test -e "$DPDK_INCLUDE_PATH/dpdk/rte_config.h"; then
DPDK_INCLUDE="-I$DPDK_INCLUDE_PATH/dpdk"
fi
DPDK_LIB_DIR="$with_dpdk/lib"
;;
esac
DPDK_LIB="-ldpdk"
DPDK_EXTRA_LIB=""
ovs_save_CFLAGS="$CFLAGS"
ovs_save_LDFLAGS="$LDFLAGS"
CFLAGS="$CFLAGS $DPDK_INCLUDE"
if test "$DPDK_AUTO_DISCOVER" = "false"; then
LDFLAGS="$LDFLAGS -L${DPDK_LIB_DIR}"
fi
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[
#include <rte_config.h>
#if RTE_LIBRTE_VHOST_NUMA
#error
#endif
], [])
], [],
[AC_SEARCH_LIBS([get_mempolicy],[numa],[],[AC_MSG_ERROR([unable to find libnuma, install the dependency package])])
DPDK_EXTRA_LIB="-lnuma"
AC_DEFINE([VHOST_NUMA], [1], [NUMA Aware vHost support detected in DPDK.])])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[
#include <rte_config.h>
#if RTE_LIBRTE_PMD_PCAP
#error
#endif
], [])
], [],
[AC_SEARCH_LIBS([pcap_dump],[pcap],[],[AC_MSG_ERROR([unable to find libpcap, install the dependency package])])
DPDK_EXTRA_LIB="-lpcap"
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM(
[
#include <rte_config.h>
#if RTE_LIBRTE_PDUMP
#error
#endif
], [])
], [],
[AC_DEFINE([DPDK_PDUMP], [1], [DPDK pdump enabled in OVS.])])
])
# On some systems we have to add -ldl to link with dpdk
#
# This code, at first, tries to link without -ldl (""),
# then adds it and tries again.
# Before each attempt the search cache must be unset,
# otherwise autoconf will stick with the old result
DPDKLIB_FOUND=false
save_LIBS=$LIBS
for extras in "" "-ldl"; do
LIBS="$DPDK_LIB $extras $save_LIBS $DPDK_EXTRA_LIB"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([#include <rte_config.h>
#include <rte_eal.h>],
[int rte_argc; char ** rte_argv;
rte_eal_init(rte_argc, rte_argv);])],
[DPDKLIB_FOUND=true])
if $DPDKLIB_FOUND; then
break
fi
done
# If linking unsuccessful
if test "$DPDKLIB_FOUND" = "false" ; then
if $DPDK_AUTO_DISCOVER; then
AC_MSG_ERROR([Could not find DPDK library in default search path, Use --with-dpdk to specify the DPDK library installed in non-standard location])
else
AC_MSG_ERROR([Could not find DPDK libraries in $DPDK_LIB_DIR])
fi
fi
CFLAGS="$ovs_save_CFLAGS"
LDFLAGS="$ovs_save_LDFLAGS"
if test "$DPDK_AUTO_DISCOVER" = "false"; then
OVS_LDFLAGS="$OVS_LDFLAGS -L$DPDK_LIB_DIR"
fi
OVS_CFLAGS="$OVS_CFLAGS $DPDK_INCLUDE"
OVS_ENABLE_OPTION([-mssse3])
# DPDK pmd drivers are not linked unless --whole-archive is used.
#
# This happens because the rest of the DPDK code doesn't use any symbol in
# the pmd driver objects, and the drivers register themselves using an
# __attribute__((constructor)) function.
#
# These options are specified inside a single -Wl directive to prevent
# autotools from reordering them.
DPDK_vswitchd_LDFLAGS=-Wl,--whole-archive,$DPDK_LIB,--no-whole-archive
AC_SUBST([DPDK_vswitchd_LDFLAGS])
AC_DEFINE([DPDK_NETDEV], [1], [System uses the DPDK module.])
fi
AM_CONDITIONAL([DPDK_NETDEV], test "$DPDKLIB_FOUND" = true)
])
dnl OVS_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.
dnl If IF-MATCH is empty then it defines to OVS_DEFINE(HAVE_<REGEX>), with
dnl <REGEX> translated to uppercase.
AC_DEFUN([OVS_GREP_IFELSE], [
AC_MSG_CHECKING([whether $2 matches in $1])
if test -f $1; then
grep '$2' $1 >/dev/null 2>&1
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$3], [], [OVS_DEFINE([HAVE_]m4_toupper([$2]))], [$3])
;;
1)
AC_MSG_RESULT([no])
$4
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$4
fi
])
dnl OVS_FIND_FIELD_IFELSE(FILE, STRUCTURE, REGEX, [IF-MATCH], [IF-NO-MATCH])
dnl
dnl Looks for STRUCTURE in FILE. If it is found, greps for REGEX within the
dnl structure definition. If this is successful, runs IF-MATCH, otherwise
dnl IF_NO_MATCH. If IF-MATCH is empty then it defines to
dnl OVS_DEFINE(HAVE_<STRUCTURE>_WITH_<REGEX>), with <STRUCTURE> and <REGEX>
dnl translated to uppercase.
AC_DEFUN([OVS_FIND_FIELD_IFELSE], [
AC_MSG_CHECKING([whether $2 has member $3 in $1])
if test -f $1; then
awk '/$2.{/,/^}/' $1 2>/dev/null | grep '$3' >/dev/null
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
;;
1)
AC_MSG_RESULT([no])
$5
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$5
fi
])
dnl OVS_FIND_PARAM_IFELSE(FILE, FUNCTION, REGEX, [IF-MATCH], [IF-NO-MATCH])
dnl
dnl Looks for FUNCTION in FILE. If it is found, greps for REGEX within
dnl the function signature starting from the line matching FUNCTION
dnl and ending with the line containing the closing parenthesis. If
dnl this is successful, runs IF-MATCH, otherwise IF_NO_MATCH. If
dnl IF-MATCH is empty then it defines to
dnl OVS_DEFINE(HAVE_<FUNCTION>_WITH_<REGEX>), with <FUNCTION> and
dnl <REGEX> translated to uppercase.
AC_DEFUN([OVS_FIND_PARAM_IFELSE], [
AC_MSG_CHECKING([whether $2 has parameter $3 in $1])
if test -f $1; then
awk '/$2[[ \t\n]]*\(/,/\)/' $1 2>/dev/null | grep '$3' >/dev/null
status=$?
case $status in
0)
AC_MSG_RESULT([yes])
m4_if([$4], [], [OVS_DEFINE([HAVE_]m4_toupper([$2])[_WITH_]m4_toupper([$3]))], [$4])
;;
1)
AC_MSG_RESULT([no])
$5
;;
*)
AC_MSG_ERROR([grep exited with status $status])
;;
esac
else
AC_MSG_RESULT([file not found])
$5
fi
])
dnl OVS_DEFINE(NAME)
dnl
dnl Defines NAME to 1 in kcompat.h.
AC_DEFUN([OVS_DEFINE], [
echo '#define $1 1' >> datapath/linux/kcompat.h.new
])
dnl OVS_CHECK_LINUX_COMPAT
dnl
dnl Runs various Autoconf checks on the Linux kernel source in
dnl the directory in $KBUILD.
AC_DEFUN([OVS_CHECK_LINUX_COMPAT], [
rm -f datapath/linux/kcompat.h.new
mkdir -p datapath/linux
: > datapath/linux/kcompat.h.new
echo '#include <linux/version.h>
#ifndef RHEL_RELEASE_CODE
#define RHEL_RELEASE_CODE 0
#define RHEL_RELEASE_VERSION(a, b) 0
#endif' >> datapath/linux/kcompat.h.new
OVS_GREP_IFELSE([$KSRC/arch/x86/include/asm/checksum_32.h], [src_err,],
[OVS_DEFINE([HAVE_CSUM_COPY_DBG])])
OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_dst_lookup.*net],
[OVS_DEFINE([HAVE_IPV6_DST_LOOKUP_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/addrconf.h], [ipv6_stub])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [ERR_CAST])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [IS_ERR_OR_NULL])
OVS_GREP_IFELSE([$KSRC/include/linux/err.h], [PTR_ERR_OR_ZERO])
OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [eth_hw_addr_random])
OVS_GREP_IFELSE([$KSRC/include/linux/etherdevice.h], [ether_addr_copy])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [IFLA_GENEVE_TOS])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/if_link.h], [rtnl_link_stats64])
OVS_GREP_IFELSE([$KSRC/include/linux/if_link.h], [rtnl_link_stats64])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_set_encap_proto])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_hwaccel_push_inside])
OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [ipv4_is_multicast])
OVS_GREP_IFELSE([$KSRC/include/linux/in.h], [proto_ports_offset])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*dst_entry],
[OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_DST_ENTRY])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [__ip_select_ident.*net],
[OVS_DEFINE([HAVE_IP_SELECT_IDENT_USING_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [inet_get_local_port_range.*net],
[OVS_DEFINE([HAVE_INET_GET_LOCAL_PORT_RANGE_USING_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_defrag.*net],
[OVS_DEFINE([HAVE_IP_DEFRAG_TAKES_NET])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
[ip_do_fragment], [net],
[OVS_DEFINE([HAVE_IP_DO_FRAGMENT_TAKES_NET])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/ip.h],
[ip_local_out], [net],
[OVS_DEFINE([HAVE_IP_LOCAL_OUT_TAKES_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [ip_skb_dst_mtu])
OVS_GREP_IFELSE([$KSRC/include/net/ip.h], [IPSKB_FRAG_PMTU],
[OVS_DEFINE([HAVE_CORRECT_MRU_HANDLING])])
OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h], [__ip_tunnel_change_mtu])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [hashfn.*const],
[OVS_DEFINE([HAVE_INET_FRAGS_CONST])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [last_in],
[OVS_DEFINE([HAVE_INET_FRAGS_LAST_IN])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evicting])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_evictor])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
[frags_work])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frags],
[rwlock])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_queue],
[list_evictor])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [inet_frag_lru_move])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/inet_frag.h],
[sub_frag_mem_limit], [struct.netns_frags],
[OVS_DEFINE([HAVE_SUB_FRAG_MEM_LIMIT_ARG_STRUCT_NETNS_FRAGS])])
OVS_GREP_IFELSE([$KSRC/include/net/inet_frag.h], [void.*inet_frags_init],
[OVS_DEFINE([HAVE_VOID_INET_FRAGS_INIT])])
OVS_GREP_IFELSE([$KSRC/include/net/inetpeer.h], [vif],
[OVS_DEFINE([HAVE_INETPEER_VIF_SUPPORT])])
dnl Check for dst_cache and ipv6 lable to use backported tunnel infrastructure.
dnl OVS does not really need ipv6 label field, but its presence signifies that
dnl the stack has all required ipv6 support.
dnl OVS also does not need dst_cache But this dependency allows us to write
dnl much cleaner code.
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/ip_tunnels.h], [ip_tunnel_key],
[label],
[OVS_GREP_IFELSE([$KSRC/include/net/ip_tunnels.h],
[iptunnel_pull_offloads],
[OVS_GREP_IFELSE([$KSRC/include/net/dst_cache.h], [dst_cache],
[OVS_DEFINE([USE_UPSTREAM_TUNNEL])])])])
OVS_GREP_IFELSE([$KSRC/include/net/mpls.h], [mpls_hdr],
[OVS_DEFINE([MPLS_HEADER_IS_L3])])
OVS_GREP_IFELSE([$KSRC/include/linux/net.h], [sock_create_kern.*net],
[OVS_DEFINE([HAVE_SOCK_CREATE_KERN_NET])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_fill_metadata_dst])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_disable_lro])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_stats])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_get_by_index_rcu])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [dev_recursion_level])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [__skb_gso_segment])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [can_checksum_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_get_iflink])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_features_check],
[OVS_DEFINE([USE_UPSTREAM_TUNNEL_GSO])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_vxlan_port])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [ndo_add_geneve_port])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netdev_features_t])
dnl Ubuntu kernel 3.13 has defined this struct but not used for netdev->tstats.
dnl So check type of tstats.
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [pcpu_sw_netstats.*tstats],
[OVS_DEFINE([HAVE_PCPU_SW_NETSTATS])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [netif_needs_gso.*net_device],
[OVS_DEFINE([HAVE_NETIF_NEEDS_GSO_NETDEV])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [skb_csum_hwoffload_help])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [udp_offload.*uoff],
[OVS_DEFINE([HAVE_UDP_OFFLOAD_ARG_UOFF])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [gro_remcsum])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h], [IFF_PHONY_HEADROOM])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device_ops],
[extended])
OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netdevice.h],
[netdev_master_upper_dev_link], [upper_priv],
[OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_PRIV])])
OVS_GREP_IFELSE([$KSRC/include/linux/netdevice.h],
[netdev_master_upper_dev_link_rh],
[OVS_DEFINE([HAVE_NETDEV_MASTER_UPPER_DEV_LINK_RH])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
[max_mtu])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_state])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_register_net_hook])
OVS_GREP_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn.*nf_hook_ops],
[OVS_DEFINE([HAVE_NF_HOOKFN_ARG_OPS])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hookfn], [priv],
[OVS_DEFINE([HAVE_NF_HOOKFN_ARG_PRIV])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
[owner], [OVS_DEFINE([HAVE_NF_HOOKS_OPS_OWNER])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter_ipv6.h], [nf_ipv6_ops],
[fragment.*sock], [OVS_DEFINE([HAVE_NF_IPV6_OPS_FRAGMENT])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_conn], [struct timer_list[[ \t]]*timeout],
[OVS_DEFINE([HAVE_NF_CONN_TIMER])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_delete(], [OVS_DEFINE([HAVE_NF_CT_DELETE])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_tmpl_alloc], [nf_conntrack_zone],
[OVS_DEFINE([HAVE_NF_CT_TMPL_ALLOC_TAKES_STRUCT_ZONE])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_get_tuplepr], [struct.net],
[OVS_DEFINE([HAVE_NF_CT_GET_TUPLEPR_TAKES_STRUCT_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_set])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack.h],
[nf_ct_is_untracked])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_zones.h],
[nf_ct_zone_init])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
[nf_connlabels_get])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
[nf_connlabels_get], [int bit],
[OVS_DEFINE([HAVE_NF_CONNLABELS_GET_TAKES_BIT])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_labels.h],
[nf_conn_labels], [words])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_ct_nat_ext_add])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_nat.h], [nf_nat_alloc_null_binding])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_seqadj.h], [nf_ct_seq_adjust])
OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32])
OVS_GREP_IFELSE([$KSRC/include/linux/random.h], [prandom_u32_max])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [get_link_net])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [name_assign_type])
OVS_GREP_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_create_link.*src_net],
[OVS_DEFINE([HAVE_RTNL_CREATE_LINK_SRC_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/net_namespace.h], [possible_net_t])
OVS_GREP_IFELSE([$KSRC/include/linux/rcupdate.h], [rcu_read_lock_held], [],
[OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h],
[rcu_read_lock_held])])
OVS_GREP_IFELSE([$KSRC/include/linux/rtnetlink.h], [lockdep_rtnl_is_held])
# Check for the proto_data_valid member in struct sk_buff. The [^@]
# is necessary because some versions of this header remove the
# member but retain the kerneldoc comment that describes it (which
# starts with @). The brackets must be doubled because of m4
# quoting rules.
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [[[^@]]proto_data_valid],
[OVS_DEFINE([HAVE_PROTO_DATA_VALID])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_checksum_start_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [inner_protocol_type])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_inner_transport_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [kfree_skb_list])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [rxhash])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u16.*rxhash],
[OVS_DEFINE([HAVE_U16_RXHASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_dst(],
[OVS_DEFINE([HAVE_SKB_DST_ACCESSOR_FUNCS])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[skb_copy_from_linear_data_offset])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],
[skb_reset_tail_pointer])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_cow_head])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_warn_if_lro],
[OVS_DEFINE([HAVE_SKB_WARN_LRO])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [consume_skb])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_frag_page])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_has_frag_list])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_fill_page_desc])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_reset_mac_len])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_unclone])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_orphan_frags])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_get_hash(],
[OVS_DEFINE([HAVE_SKB_GET_HASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [int.skb_zerocopy(],
[OVS_DEFINE([HAVE_SKB_ZEROCOPY])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [u8.*l4_rxhash],
[OVS_DEFINE([HAVE_L4_RXHASH])])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_ensure_writable])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_pop])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [__skb_vlan_pop])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_vlan_push])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_clear_hash_if_not_l4])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_postpush_rcsum])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [lco_csum])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_nfct])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [skb_put_zero])
OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [bool],
[OVS_DEFINE([HAVE_BOOL_TYPE])])
OVS_GREP_IFELSE([$KSRC/include/linux/types.h], [__wsum],
[OVS_DEFINE([HAVE_CSUM_TYPES])])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/types.h], [__wsum],
[OVS_DEFINE([HAVE_CSUM_TYPES])])
OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_replace4])
OVS_GREP_IFELSE([$KSRC/include/net/checksum.h], [csum_unfold])
OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [dst_discard_sk])
OVS_GREP_IFELSE([$KSRC/include/net/dst.h], [__skb_dst_copy])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_has_listeners])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [mcgrp_offset])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [parallel_ops])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [netlink_has_listeners(net->genl_sock],
[OVS_DEFINE([HAVE_GENL_HAS_LISTENERS_TAKES_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genlmsg_parse])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [genl_notify.*family],
[OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_FAMILY])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/genetlink.h],
[genl_notify], [net],
[OVS_DEFINE([HAVE_GENL_NOTIFY_TAKES_NET])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/genetlink.h],
[genl_multicast_group], [id])
OVS_GREP_IFELSE([$KSRC/include/net/geneve.h], [geneve_hdr])
OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_cisco_register])
OVS_GREP_IFELSE([$KSRC/include/net/gre.h], [gre_handle_offloads])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [IP6_FH_F_SKIP_RH])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [ip6_local_out_sk])
OVS_GREP_IFELSE([$KSRC/include/net/ipv6.h], [__ipv6_addr_jhash])
OVS_GREP_IFELSE([$KSRC/include/net/ip6_fib.h], [rt6i.*u.dst],
[OVS_DEFINE([HAVE_RT6INFO_DST_UNION])])
OVS_GREP_IFELSE([$KSRC/include/net/ip6_route.h], [ip6_frag.*sock],
[OVS_DEFINE([HAVE_IP_FRAGMENT_TAKES_SOCK])])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_64bit])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_get_be16])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be16])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be32])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_be64])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_put_in_addr])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_find_nested])
OVS_GREP_IFELSE([$KSRC/include/net/netlink.h], [nla_is_last])
OVS_GREP_IFELSE([$KSRC/include/linux/netlink.h], [void.*netlink_set_err],
[OVS_DEFINE([HAVE_VOID_NETLINK_SET_ERR])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netlink.h],
[nla_parse], [netlink_ext_ack],
[OVS_DEFINE([HAVE_NETLINK_EXT_ACK])])
OVS_GREP_IFELSE([$KSRC/include/net/sctp/checksum.h], [sctp_compute_cksum])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [ADD_ALL_VLANS_CMD],
[OVS_DEFINE([HAVE_VLAN_BUG_WORKAROUND])])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_insert_tag_set_proto])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [__vlan_insert_tag])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [vlan_get_protocol])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [skb_vlan_tagged])
OVS_GREP_IFELSE([$KSRC/include/linux/if_vlan.h], [eth_type_vlan])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/dst_metadata.h],
[metadata_dst_alloc], [metadata_type])
OVS_GREP_IFELSE([$KSRC/include/linux/u64_stats_sync.h], [u64_stats_fetch_begin_irq])
OVS_GREP_IFELSE([$KSRC/include/net/vxlan.h], [struct vxlan_metadata],
[OVS_DEFINE([HAVE_VXLAN_METADATA])])
OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_flow_src_port],
[OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [inet_get_local_port_range(net],
[OVS_DEFINE([HAVE_UDP_FLOW_SRC_PORT])])])
OVS_GREP_IFELSE([$KSRC/include/net/udp.h], [udp_v4_check])
OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_gro_complete])
OVS_GREP_IFELSE([$KSRC/include/net/udp_tunnel.h], [sk_buff.*udp_tunnel_handle_offloads],
[OVS_DEFINE([HAVE_UDP_TUNNEL_HANDLE_OFFLOAD_RET_SKB])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/udp_tunnel.h], [udp_tunnel_sock_cfg],
[gro_receive])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h], [ignore_df],
[OVS_DEFINE([HAVE_IGNORE_DF_RENAME])])
OVS_GREP_IFELSE([$KSRC/include/uapi/linux/netdevice.h], [NET_NAME_UNKNOWN],
[OVS_DEFINE([HAVE_NET_NAME_UNKNOWN])])
OVS_GREP_IFELSE([$KSRC/include/net/sock.h], [sk_no_check_tx])
OVS_GREP_IFELSE([$KSRC/include/linux/udp.h], [no_check6_tx])
OVS_GREP_IFELSE([$KSRC/include/linux/utsrelease.h], [el6],
[OVS_DEFINE([HAVE_RHEL6_PER_CPU])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/protocol.h],
[udp_add_offload], [net],
[OVS_DEFINE([HAVE_UDP_ADD_OFFLOAD_TAKES_NET])])
OVS_FIND_PARAM_IFELSE([$KSRC/include/net/netfilter/ipv6/nf_defrag_ipv6.h],
[nf_defrag_ipv6_enable], [net],
[OVS_DEFINE([HAVE_DEFRAG_ENABLE_TAKES_NET])])
OVS_GREP_IFELSE([$KSRC/include/net/genetlink.h], [family_list],
[OVS_DEFINE([HAVE_GENL_FAMILY_LIST])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netdevice.h], [net_device],
[needs_free_netdev],
[OVS_DEFINE([HAVE_NEEDS_FREE_NETDEV])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/vxlan.h], [vxlan_dev], [cfg],
[OVS_DEFINE([HAVE_VXLAN_DEV_CFG])])
OVS_GREP_IFELSE([$KSRC/include/net/netfilter/nf_conntrack_helper.h],
[nf_conntrack_helper_put],
[OVS_DEFINE(HAVE_NF_CONNTRACK_HELPER_PUT)])
OVS_GREP_IFELSE([$KSRC/include/linux/skbuff.h],[[[[:space:]]]SKB_GSO_UDP[[[:space:]]]],
[OVS_DEFINE([HAVE_SKB_GSO_UDP])])
OVS_GREP_IFELSE([$KSRC/include/net/dst.h],[DST_NOCACHE],
[OVS_DEFINE([HAVE_DST_NOCACHE])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/net/rtnetlink.h], [rtnl_link_ops],
[extack],
[OVS_DEFINE([HAVE_EXT_ACK_IN_RTNL_LINKOPS])])
OVS_FIND_FIELD_IFELSE([$KSRC/include/linux/netfilter.h], [nf_hook_ops],
[list],
[OVS_DEFINE([HAVE_LIST_IN_NF_HOOK_OPS])])
if cmp -s datapath/linux/kcompat.h.new \
datapath/linux/kcompat.h >/dev/null 2>&1; then
rm datapath/linux/kcompat.h.new
else
mv datapath/linux/kcompat.h.new datapath/linux/kcompat.h
fi
])
dnl Checks for net/if_packet.h.
AC_DEFUN([OVS_CHECK_IF_PACKET],
[AC_CHECK_HEADER([net/if_packet.h],
[HAVE_IF_PACKET=yes],
[HAVE_IF_PACKET=no])
AM_CONDITIONAL([HAVE_IF_PACKET], [test "$HAVE_IF_PACKET" = yes])
if test "$HAVE_IF_PACKET" = yes; then
AC_DEFINE([HAVE_IF_PACKET], [1],
[Define to 1 if net/if_packet.h is available.])
fi])
dnl Checks for net/if_dl.h.
dnl
dnl (We use this as a proxy for checking whether we're building on FreeBSD
dnl or NetBSD.)
AC_DEFUN([OVS_CHECK_IF_DL],
[AC_CHECK_HEADER([net/if_dl.h],
[HAVE_IF_DL=yes],
[HAVE_IF_DL=no])
AM_CONDITIONAL([HAVE_IF_DL], [test "$HAVE_IF_DL" = yes])
if test "$HAVE_IF_DL" = yes; then
AC_DEFINE([HAVE_IF_DL], [1],
[Define to 1 if net/if_dl.h is available.])
# On these platforms we use libpcap to access network devices.
AC_SEARCH_LIBS([pcap_open_live], [pcap])
fi])
dnl Checks for buggy strtok_r.
dnl
dnl Some versions of glibc 2.7 has a bug in strtok_r when compiling
dnl with optimization that can cause segfaults:
dnl
dnl http://sources.redhat.com/bugzilla/show_bug.cgi?id=5614.
AC_DEFUN([OVS_CHECK_STRTOK_R],
[AC_CACHE_CHECK(
[whether strtok_r macro segfaults on some inputs],
[ovs_cv_strtok_r_bug],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM([#include <stdio.h>
#include <string.h>
],
[[#if __GLIBC__ == 2 && __GLIBC_MINOR__ < 8
/* Assume bug is present, because relatively minor
changes in compiler settings (e.g. optimization
level) can make it crop up. */
return 1;
#else
char string[] = ":::";
char *save_ptr = (char *) 0xc0ffee;
char *token1, *token2;
token1 = strtok_r(string, ":", &save_ptr);
token2 = strtok_r(NULL, ":", &save_ptr);
freopen ("/dev/null", "w", stdout);
printf ("%s %s\n", token1, token2);
return 0;
#endif
]])],
[ovs_cv_strtok_r_bug=no],
[ovs_cv_strtok_r_bug=yes],
[ovs_cv_strtok_r_bug=yes])])
if test $ovs_cv_strtok_r_bug = yes; then
AC_DEFINE([HAVE_STRTOK_R_BUG], [1],
[Define if strtok_r macro segfaults on some inputs])
fi
])
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.
AC_DEFUN([_OVS_CHECK_CC_OPTION], [dnl
m4_define([ovs_cv_name], [ovs_cv_[]m4_translit([$1], [-= ], [__])])dnl
AC_CACHE_CHECK([whether $CC accepts $1], [ovs_cv_name],
[ovs_save_CFLAGS="$CFLAGS"
dnl Include -Werror in the compiler options, because without -Werror
dnl clang's GCC-compatible compiler driver does not return a failure
dnl exit status even though it complains about options it does not
dnl understand.
dnl
dnl Also, check stderr as gcc exits with status 0 for options
dnl rejected at getopt level.
dnl % touch /tmp/a.c
dnl % gcc -g -c -Werror -Qunused-arguments /tmp/a.c; echo $?
dnl gcc: unrecognized option '-Qunused-arguments'
dnl 0
dnl %
CFLAGS="$CFLAGS $WERROR $1"
AC_COMPILE_IFELSE(
[AC_LANG_SOURCE([int x;])],
[if test -s conftest.err && grep "unrecognized option" conftest.err
then
ovs_cv_name[]=no
else
ovs_cv_name[]=yes
fi],
[ovs_cv_name[]=no])
CFLAGS="$ovs_save_CFLAGS"])
if test $ovs_cv_name = yes; then
m4_if([$2], [], [:], [$2])
else
m4_if([$3], [], [:], [$3])
fi
])
dnl OVS_CHECK_WERROR
dnl
dnl Check whether the C compiler accepts -Werror.
dnl Sets $WERROR to "-Werror", if so, and otherwise to the empty string.
AC_DEFUN([OVS_CHECK_WERROR],
[WERROR=
_OVS_CHECK_CC_OPTION([-Werror], [WERROR=-Werror])])
dnl OVS_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([OVS_CHECK_CC_OPTION],
[AC_REQUIRE([OVS_CHECK_WERROR])
_OVS_CHECK_CC_OPTION([$1], [$2], [$3])])
dnl OVS_ENABLE_OPTION([OPTION])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, add it to WARNING_FLAGS.
dnl Example: OVS_ENABLE_OPTION([-Wdeclaration-after-statement])
AC_DEFUN([OVS_ENABLE_OPTION],
[OVS_CHECK_CC_OPTION([$1], [WARNING_FLAGS="$WARNING_FLAGS $1"])
AC_SUBST([WARNING_FLAGS])])
dnl OVS_CONDITIONAL_CC_OPTION([OPTION], [CONDITIONAL])
dnl Check whether the given C compiler OPTION is accepted.
dnl If so, enable the given Automake CONDITIONAL.
dnl Example: OVS_CONDITIONAL_CC_OPTION([-Wno-unused], [HAVE_WNO_UNUSED])
AC_DEFUN([OVS_CONDITIONAL_CC_OPTION],
[OVS_CHECK_CC_OPTION(
[$1], [ovs_have_cc_option=yes], [ovs_have_cc_option=no])
AM_CONDITIONAL([$2], [test $ovs_have_cc_option = yes])])
dnl ----------------------------------------------------------------------
dnl Check for too-old XenServer.
AC_DEFUN([OVS_CHECK_XENSERVER_VERSION],
[AC_CACHE_CHECK([XenServer release], [ovs_cv_xsversion],
[if test -e /etc/redhat-release; then
ovs_cv_xsversion=`sed -n 's/^XenServer DDK release \([[^-]]*\)-.*/\1/p' /etc/redhat-release`
fi
if test -z "$ovs_cv_xsversion"; then
ovs_cv_xsversion=none
fi])
case $ovs_cv_xsversion in
none)
;;
[[1-9]][[0-9]]* | dnl XenServer 10 or later
[[6-9]]* | dnl XenServer 6 or later
5.[[7-9]]* | dnl XenServer 5.7 or later
5.6.[[1-9]][[0-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.1000 or later
5.6.[[2-9]][[0-9]][[0-9]]* | dnl XenServer 5.6.200 or later
5.6.1[[0-9]][[0-9]]) dnl Xenserver 5.6.100 or later
;;
*)
AC_MSG_ERROR([This appears to be XenServer $ovs_cv_xsversion, but only XenServer 5.6.100 or later is supported. (If you are really using a supported version of XenServer, you may override this error message by specifying 'ovs_cv_xsversion=5.6.100' on the "configure" command line.)])
;;
esac])
dnl OVS_CHECK_SPARSE_TARGET
dnl
dnl The "cgcc" script from "sparse" isn't very good at detecting the
dnl target for which the code is being built. This helps it out.
AC_DEFUN([OVS_CHECK_SPARSE_TARGET],
[AC_CACHE_CHECK(
[target hint for cgcc],
[ac_cv_sparse_target],
[AS_CASE([`$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([$ac_cv_sparse_target],
[x86], [SPARSEFLAGS= CGCCFLAGS=-target=i86],
[x86_64], [SPARSEFLAGS=-m64 CGCCFLAGS=-target=x86_64],
[SPARSEFLAGS= CGCCFLAGS=])
AC_SUBST([SPARSEFLAGS])
AC_SUBST([CGCCFLAGS])])
dnl OVS_SPARSE_EXTRA_INCLUDES
dnl
dnl The cgcc script from "sparse" does not search gcc's default
dnl search path. Get the default search path from GCC and pass
dnl them to sparse.
AC_DEFUN([OVS_SPARSE_EXTRA_INCLUDES],
AC_SUBST([SPARSE_EXTRA_INCLUDES],
[`$CC -v -E - </dev/null 2>&1 >/dev/null | sed -n -e '/^#include.*search.*starts.*here:/,/^End.*of.*search.*list\./s/^ \(.*\)/-I \1/p' |grep -v /usr/lib | grep -x -v '\-I /usr/include' | tr \\\n ' ' `] ))
dnl OVS_ENABLE_SPARSE
AC_DEFUN([OVS_ENABLE_SPARSE],
[AC_REQUIRE([OVS_CHECK_SPARSE_TARGET])
AC_REQUIRE([OVS_SPARSE_EXTRA_INCLUDES])
: ${SPARSE=sparse}
AC_SUBST([SPARSE])
AC_CONFIG_COMMANDS_PRE(
[CC='$(if $(C),env REAL_CC="'"$CC"'" CHECK="$(SPARSE) -I $(top_srcdir)/include/sparse $(SPARSEFLAGS) $(SPARSE_EXTRA_INCLUDES) " cgcc $(CGCCFLAGS),'"$CC"')'])])