ipset: fixup kernel checks for external toolchains

Add patch to kill kernel checks since we don't build the kernel
modules anyway.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/ipset/ipset-drop-modules.patch

@@ -0,0 +1,100 @@
+Drop all the kernel checks and let the user deal with having a new enough
+version of the kernel to enjoy this.
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+---
+
+diff -Nura ipset-6.8.orig//Makefile.am ipset-6.8/Makefile.am
+--- ipset-6.8.orig//Makefile.am	2011-08-17 16:10:41.999386034 -0300
++++ ipset-6.8/Makefile.am	2011-08-17 16:17:34.108702969 -0300
+@@ -4,11 +4,6 @@
+ 
+ include $(top_srcdir)/Make_global.am
+ 
+-if ! WITH_KBUILDDIR
+-KBUILD_OUTPUT=/lib/modules/`uname -r`/build
+-else
+-KBUILD_OUTPUT=$(KBUILDDIR)
+-endif
+ if ! WITH_MAXSETS
+ IP_SET_MAX=256
+ else
+@@ -22,23 +17,6 @@
+ 
+ SUBDIRS		= lib src
+ 
+-modules_sparse:
+-	${MAKE} -C $(KBUILD_OUTPUT) M=$$PWD/kernel/net/netfilter \
+-			V=$V C=2 CF=-D__CHECK_ENDIAN__ \
+-			IP_SET_MAX=$(IP_SET_MAX) KDIR=$$PWD/kernel modules
+-
+-modules:
+-	${MAKE} -C $(KBUILD_OUTPUT) M=$$PWD/kernel/net/netfilter V=$V \
+-			IP_SET_MAX=$(IP_SET_MAX) KDIR=$$PWD/kernel modules
+-
+-modules_install:
+-	${MAKE} -C $(KBUILD_OUTPUT) M=$$PWD/kernel/net/netfilter \
+-			KDIR=$$PWD/kernel modules_install
+-
+-modules_clean:
+-	${MAKE} -C $(KBUILD_OUTPUT) M=$$PWD/kernel/net/netfilter \
+-			KDIR=$$PWD/kernel clean
+-
+ update_includes:
+ 	./update ip_set.h
+ 	./update ip_set_bitmap.h
+diff -Nura ipset-6.8.orig//configure.ac ipset-6.8/configure.ac
+--- ipset-6.8.orig//configure.ac	2011-08-17 16:10:42.015387986 -0300
++++ ipset-6.8/configure.ac	2011-08-17 16:18:01.578056869 -0300
+@@ -11,51 +11,6 @@
+ *) AC_MSG_ERROR([Linux systems supported exclusively!]);;
+ esac
+ 
+-dnl Additional arguments
+-dnl Kernel build directory or source tree
+-AC_ARG_WITH([kbuild],
+-            AS_HELP_STRING([--with-kbuild=PATH],
+-                           [Path to kernel build directory]),
+-            [KBUILDDIR="$withval";])
+-AC_ARG_WITH([ksource],
+-            AS_HELP_STRING([--with-ksource=PATH],
+-                           [Path to kernel source directory, if not the same as the kernel build directory]),
+-            [KSOURCEDIR="$withval";])
+-AM_CONDITIONAL(WITH_KBUILDDIR, test "$KBUILDDIR" != "")
+-AC_SUBST(KBUILDDIR)
+-
+-dnl Sigh: check kernel version dependencies
+-if test "$KBUILDDIR" != ""
+-then
+-	kbuilddir="$KBUILDDIR"
+-else
+-	kbuilddir="/lib/modules/`uname -r`/build"
+-fi
+-
+-if test -n "$KSOURCEDIR"; then
+-	ksourcedir="$KSOURCEDIR"
+-elif test -e "$kbuilddir/include/linux/netfilter/nfnetlink.h"; then
+-	ksourcedir="$kbuilddir"
+-else
+-	ksourcedir="/lib/modules/$(uname -r)/source"
+-fi
+-if test ! -e "$ksourcedir/include/linux/netfilter/nfnetlink.h"
+-then
+-	AC_MSG_ERROR([Invalid kernel source directory $ksourcedir])
+-fi
+-
+-if test ! -e "$kbuilddir/.config"
+-then
+-	AC_MSG_ERROR([The kernel build directory $kbuilddir is not configured])
+-fi
+-
+-AC_PROG_GREP
+-
+-if test "X`$GREP 'NFNL_SUBSYS_IPSET' $ksourcedir/include/linux/netfilter/nfnetlink.h`" = "X"
+-then
+-	AC_MSG_ERROR([The kernel source directory $ksourcedir is not patched with netlink.patch to support ipset])
+-fi
+-
+ dnl Maximal number of sets supported by the kernel, default 256
+ AC_ARG_WITH([maxsets],
+ 	    AS_HELP_STRING([--with-maxsets=256],

package/ipset/ipset.mk

@@ -9,6 +9,5 @@ IPSET_SOURCE = ipset-$(IPSET_VERSION).tar.bz2
 IPSET_SITE = http://ipset.netfilter.org
 IPSET_AUTORECONF = YES
 IPSET_DEPENDENCIES = libmnl host-pkg-config
-IPSET_CONF_OPT = --with-ksource=$(LINUX_HEADERS_DIR)
 
 $(eval $(call AUTOTARGETS,package,ipset))