From af0dd163e5e9ea9de922aba0b71f76d8d921724f Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@leeloo.lan.home.verplant.org>
Date: Thu, 17 Sep 2009 09:36:35 +0200
Subject: [PATCH] Build system: Further improve libiptc handling.
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Only check for “iptc_handle_t” and “ip6tc_handle_t” if using a
system-wide version of libiptc. If we use the shipped version, we *know*
it provides these types.
---
 configure.in   | 51 ++++++++++++++++++++++++--------------------------
 src/iptables.c | 16 ++++++++++------
 2 files changed, 34 insertions(+), 33 deletions(-)

diff --git a/configure.in b/configure.in
index 9f26be3b..092fbd02 100644
--- a/configure.in
+++ b/configure.in
@@ -1449,16 +1449,21 @@ AC_ARG_WITH(libiptc, [AS_HELP_STRING([--with-libiptc@<:@=PREFIX@:>@], [Path to l
 		with_libiptc="no (Linux only)"
 	fi
 ])
-if test "x$with_libiptc" = "xyes" && test "x$with_own_libiptc" = "xno"
+SAVE_CPPFLAGS="$CPPFLAGS"
+SAVE_LDFLAGS="$LDFLAGS"
+CPPFLAGS="$CPPFLAGS $LIBIPTC_CPPFLAGS"
+LDFLAGS="$LDFLAGS $LIBIPTC_LDFLAGS"
+if test "x$with_libiptc" = "xyes"
 then
-	AC_CHECK_LIB(iptc, iptc_init,
+	AC_CHECK_HEADERS(linux/netfilter_ipv4/ip_tables.h linux/netfilter_ipv6/ip6_tables.h, [],
 	[
-		AC_DEFINE(HAVE_LIBIPTC, 1, [Define to 1 if you have the iptc library (-liptc).])
+		with_libiptc="no (Linux iptables headers not found)"
+		with_own_libiptc="no"
 	],
 	[
-		with_libiptc="yes"
-		with_own_libiptc="yes"
+#include "$srcdir/src/owniptc/ipt_kernel_headers.h"
 	])
+
 fi
 if test "x$with_libiptc" = "xyes" && test "x$with_own_libiptc" = "xno"
 then
@@ -1471,27 +1476,8 @@ then
 		with_own_libiptc="yes"
 	])
 fi
-if test "x$with_libiptc" = "xyes"
-then
-	SAVE_CPPFLAGS="$CPPFLAGS"
-	CPPFLAGS="$CPPFLAGS $LIBIPTC_CPPFLAGS"
-
-	AC_CHECK_HEADERS(linux/netfilter_ipv4/ip_tables.h linux/netfilter_ipv6/ip6_tables.h, [],
-	[
-		with_libiptc="no (Linux iptables headers not found - check KERNEL_DIR)"
-		with_own_libiptc="no"
-	],
-	[
-#include "$srcdir/src/owniptc/ipt_kernel_headers.h"
-	])
-
-	CPPFLAGS="$SAVE_CPPFLAGS"
-fi
-if test "x$with_libiptc" = "xyes"
+if test "x$with_libiptc" = "xyes" && test "x$with_own_libiptc" = "xno"
 then
-	SAVE_CPPFLAGS="$CPPFLAGS"
-	CPPFLAGS="$CPPFLAGS $LIBIPTC_CPPFLAGS"
-
 	AC_CHECK_TYPES([iptc_handle_t, ip6tc_handle_t], [], [],
 	[
 #if OWN_LIBIPTC
@@ -1502,8 +1488,17 @@ then
 # include <libiptc/libip6tc.h>
 #endif
 	])
-
-	CPPFLAGS="$SAVE_CPPFLAGS"
+fi
+if test "x$with_libiptc" = "xyes" && test "x$with_own_libiptc" = "xno"
+then
+	AC_CHECK_LIB(iptc, iptc_init,
+	[
+		AC_DEFINE(HAVE_LIBIPTC, 1, [Define to 1 if you have the iptc library (-liptc).])
+	],
+	[
+		with_libiptc="yes"
+		with_own_libiptc="yes"
+	])
 fi
 AM_CONDITIONAL(BUILD_WITH_LIBIPTC, test "x$with_libiptc" = "xyes")
 AM_CONDITIONAL(BUILD_WITH_OWN_LIBIPTC, test "x$with_own_libiptc" = "xyes")
@@ -1518,6 +1513,8 @@ if test "x$with_own_libiptc" = "xyes"
 then
 	AC_DEFINE(OWN_LIBIPTC, 1, [Define to 1 if we use the shipped iptc library.])
 fi
+CPPFLAGS="$SAVE_CPPFLAGS"
+LDFLAGS="$SAVE_LDFLAGS"
 # }}}
 
 # --with-java {{{
diff --git a/src/iptables.c b/src/iptables.c
index 69cd39c4..aa53074a 100644
--- a/src/iptables.c
+++ b/src/iptables.c
@@ -34,10 +34,13 @@
 #if OWN_LIBIPTC
 # include "owniptc/libiptc.h"
 # include "owniptc/libip6tc.h"
-#else
+
+# define HAVE_IPTC_HANDLE_T 1
+# define HAVE_IP6TC_HANDLE_T 1
+
+#else /* if !OWN_LIBIPTC */
 # include <libiptc/libiptc.h>
 # include <libiptc/libip6tc.h>
-#endif
 
 /*
  * iptc_handle_t was available before libiptc was officially available as a
@@ -51,12 +54,13 @@
  * this is somewhat hacky, I didn't find better way to solve that :-/
  * -tokkee
  */
-#ifndef HAVE_IPTC_HANDLE_T
+# ifndef HAVE_IPTC_HANDLE_T
 typedef struct iptc_handle iptc_handle_t;
-#endif
-#ifndef HAVE_IP6TC_HANDLE_T
+# endif
+# ifndef HAVE_IP6TC_HANDLE_T
 typedef struct ip6tc_handle ip6tc_handle_t;
-#endif
+# endif
+#endif /* !OWN_LIBIPTC */
 
 /*
  * (Module-)Global variables
-- 
2.30.2