From 9bf39535ce55d5ff736c2ab3ee8ffdd8d8d8d62f Mon Sep 17 00:00:00 2001
From: Boian Berberov <bberberov@gmail.com>
Date: Mon, 11 Aug 2008 16:57:57 +0200
Subject: [PATCH] configure.in: Look for ip_vs.h in the kernel sources.

Developers,

I am writing an updated ebuild for gentoo and I made this patch that allows
ip_vs.h to be located and the ipvs module to build. Normally I would include
this with the ebuild, but I thought it may be beneficial to send it to you.
Please review it and let me know what you think. I am still inexperienced with
autotools so the patch may not be well put together. If you would consider
applying it or a similar patch, please let me know so I can adjust the ebuild
accordingly.

Signed-off-by: Sebastian Harl <sh@tokkee.org>
Signed-off-by: Florian Forster <octo@huhu.verplant.org>
---
 configure.in    | 28 ++++++++++++++++++----------
 src/Makefile.am |  1 +
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/configure.in b/configure.in
index 41ee9555..ceb25538 100644
--- a/configure.in
+++ b/configure.in
@@ -50,6 +50,18 @@ case $host_os in
 esac
 AC_MSG_RESULT([$ac_system])
 
+if test "x$ac_system" = "xLinux"
+then
+	AC_ARG_VAR([KERNEL_DIR], [path to Linux kernel sources])
+	if test -z "$KERNEL_DIR"
+	then
+		KERNEL_DIR="/lib/modules/`uname -r`/source"
+	fi
+
+	KERNEL_CFLAGS="-I$KERNEL_DIR/include"
+	AC_SUBST(KERNEL_CFLAGS)
+fi
+
 #
 # Checks for header files.
 #
@@ -278,8 +290,13 @@ have_net_ip_vs_h="no"
 have_ip_vs_h="no"
 if test "x$ac_system" = "xLinux"
 then
+	SAVE_CFLAGS=$CFLAGS
+	CFLAGS="$CFLAGS $KERNEL_CFLAGS"
+
 	AC_CHECK_HEADERS(net/ip_vs.h, [have_net_ip_vs_h="yes"])
 	AC_CHECK_HEADERS(ip_vs.h, [have_ip_vs_h="yes"])
+
+	CFLAGS=$SAVE_CFLAGS
 fi
 
 # For quota module
@@ -1599,15 +1616,6 @@ then
 	LDFLAGS=$SAVE_LDFLAGS
 fi
 
-if test "x$ac_system" = "xLinux"
-then
-	AC_ARG_VAR([KERNEL_DIR], [path to Linux kernel sources])
-	if test -z "$KERNEL_DIR"
-	then
-		KERNEL_DIR="/lib/modules/`uname -r`/source"
-	fi
-fi
-
 with_own_libiptc="no"
 AC_ARG_WITH(libiptc, [AS_HELP_STRING([--with-libiptc@<:@=PREFIX@:>@], [Path to libiptc.])],
 [
@@ -1653,7 +1661,7 @@ fi
 if test "x$with_libiptc" = "xyes"
 then
 	SAVE_CFLAGS=$CFLAGS
-	CFLAGS="$CFLAGS -I$KERNEL_DIR/include"
+	CFLAGS="$CFLAGS $KERNEL_CFLAGS"
 
 	AC_CHECK_HEADERS(linux/netfilter_ipv4/ip_tables.h linux/netfilter_ipv6/ip6_tables.h, [],
 	[
diff --git a/src/Makefile.am b/src/Makefile.am
index 21022493..a4f9a79f 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -311,6 +311,7 @@ endif
 if BUILD_PLUGIN_IPVS
 pkglib_LTLIBRARIES += ipvs.la
 ipvs_la_SOURCES = ipvs.c
+ipvs_la_CFLAGS = $(KERNEL_CFLAGS)
 ipvs_la_LDFLAGS = -module -avoid-version
 collectd_LDADD += "-dlopen" ipvs.la
 collectd_DEPENDENCIES += ipvs.la
-- 
2.30.2