Add common handling for libresolv similiar to dlopen(3) wrapping.

For now, DragonFly and FreeBSD use the libc version, it is not reentrant,
but thread-safe. NetBSD 3.0+ and Darwin 8.0+ use libresolv from base
(the BIND9 resolver), all other fall back to net/bind9. Feel free to add
your favorite platform if it has a thread-safe resolver in base.

Modify mail/libspf-alf, mail/milter-greylist, mail/spamdyke and
net/nocol accordingly. Testing on !DragonFly and feedback from tron@

4 files changed, 62 insertions, 5 deletions

diff --git a/mail/libspf-alt/Makefile b/mail/libspf-alt/Makefile
index 309fa2e6a58..60083601cde 100644
--- a/mail/libspf-alt/Makefile
+++ b/mail/libspf-alt/Makefile
@@ -1,4 +1,4 @@
-# $NetBSD: Makefile,v 1.14 2006/10/04 21:47:16 wiz Exp $
+# $NetBSD: Makefile,v 1.15 2007/07/03 13:54:45 joerg Exp $
 
 DISTNAME=	libspf_alt-0.4.0
 PKGREVISION=	3
@@ -15,5 +15,5 @@ GNU_CONFIGURE=	YES
 CONFIGURE_ARGS+=--with-bind=${BUILDLINK_PREFIX.bind}
 
 .include "../../devel/gettext-lib/buildlink3.mk"
-.include "../../net/bind9/buildlink3.mk"
+.include "../../mk/resolv.buildlink3.mk"
 .include "../../mk/bsd.pkg.mk"
diff --git a/mail/libspf-alt/buildlink3.mk b/mail/libspf-alt/buildlink3.mk
index 53bc698e008..242d4af2373 100644
--- a/mail/libspf-alt/buildlink3.mk
+++ b/mail/libspf-alt/buildlink3.mk
@@ -1,4 +1,4 @@
-# $NetBSD: buildlink3.mk,v 1.8 2006/07/08 23:10:57 jlam Exp $
+# $NetBSD: buildlink3.mk,v 1.9 2007/07/03 13:54:45 joerg Exp $
 
 BUILDLINK_DEPTH:=		${BUILDLINK_DEPTH}+
 LIBSPF_ALT_BUILDLINK3_MK:=	${LIBSPF_ALT_BUILDLINK3_MK}+
@@ -18,6 +18,6 @@ BUILDLINK_PKGSRCDIR.libspf_alt?=	../../mail/libspf-alt
 .endif	# LIBSPF_ALT_BUILDLINK3_MK
 
 .include "../../devel/gettext-lib/buildlink3.mk"
-.include "../../net/bind9/buildlink3.mk"
+.include "../../mk/resolv.buildlink3.mk"
 
 BUILDLINK_DEPTH:=		${BUILDLINK_DEPTH:S/+$//}
diff --git a/mail/libspf-alt/distinfo b/mail/libspf-alt/distinfo
index 9a5e945292d..16f666e5b99 100644
--- a/mail/libspf-alt/distinfo
+++ b/mail/libspf-alt/distinfo
@@ -1,5 +1,6 @@
-$NetBSD: distinfo,v 1.2 2005/02/24 09:59:23 agc Exp $
+$NetBSD: distinfo,v 1.3 2007/07/03 13:54:45 joerg Exp $
 
 SHA1 (libspf_alt-0.4.0.tar.gz) = ba269d7508daebf42e9e20720f410c9409207558
 RMD160 (libspf_alt-0.4.0.tar.gz) = 67a789cfbc4df391fd6938e81ce90e3b24264615
 Size (libspf_alt-0.4.0.tar.gz) = 598003 bytes
+SHA1 (patch-aa) = c2663da02cd12ff6c148f4dd2d9670e5ce71d3cb
diff --git a/mail/libspf-alt/patches/patch-aa b/mail/libspf-alt/patches/patch-aa
new file mode 100644
index 00000000000..82997b35131
--- /dev/null
+++ b/mail/libspf-alt/patches/patch-aa
@@ -0,0 +1,56 @@
+$NetBSD: patch-aa,v 1.1 2007/07/03 13:54:45 joerg Exp $
+
+--- configure.orig	2007-07-02 14:03:12.000000000 +0000
++++ configure
+@@ -19389,13 +19389,13 @@ echo "${ECHO_T}$ac_cv_lib_bind_res_query
+ if test $ac_cv_lib_bind_res_query = yes; then
+   LIBS="$LIBS -lbind"
+ else
+-  echo "$as_me:$LINENO: checking for res_query in -lresolv" >&5
+-echo $ECHO_N "checking for res_query in -lresolv... $ECHO_C" >&6
++  echo "$as_me:$LINENO: checking for res_query in ${RESOLV_LDFLAGS}" >&5
++echo $ECHO_N "checking for res_query in ${RESOLV_LDFLAGS}... $ECHO_C" >&6
+ if test "${ac_cv_lib_resolv_res_query+set}" = set; then
+   echo $ECHO_N "(cached) $ECHO_C" >&6
+ else
+   ac_check_lib_save_LIBS=$LIBS
+-LIBS="-lresolv  $LIBS"
++LIBS="${RESOLV_LDFLAGS}  $LIBS"
+ cat >conftest.$ac_ext <<_ACEOF
+ /* confdefs.h.  */
+ _ACEOF
+@@ -19453,7 +19453,7 @@ fi
+ echo "$as_me:$LINENO: result: $ac_cv_lib_resolv_res_query" >&5
+ echo "${ECHO_T}$ac_cv_lib_resolv_res_query" >&6
+ if test $ac_cv_lib_resolv_res_query = yes; then
+-  LIBS="$LIBS -lresolv"
++  LIBS="$LIBS ${RESOLV_LDFLAGS}"
+ else
+   echo "cannot find resolver library"; exit 1;
+ fi
+@@ -19464,13 +19464,13 @@ fi
+ 
+ else
+ 
+-echo "$as_me:$LINENO: checking for res_query in -lresolv" >&5
+-echo $ECHO_N "checking for res_query in -lresolv... $ECHO_C" >&6
++echo "$as_me:$LINENO: checking for res_query in ${RESOLV_LDFLAGS}" >&5
++echo $ECHO_N "checking for res_query in ${RESOLV_LDFLAGS}... $ECHO_C" >&6
+ if test "${ac_cv_lib_resolv_res_query+set}" = set; then
+   echo $ECHO_N "(cached) $ECHO_C" >&6
+ else
+   ac_check_lib_save_LIBS=$LIBS
+-LIBS="-lresolv  $LIBS"
++LIBS="${RESOLV_LDFLAGS}  $LIBS"
+ cat >conftest.$ac_ext <<_ACEOF
+ /* confdefs.h.  */
+ _ACEOF
+@@ -19532,7 +19532,7 @@ if test $ac_cv_lib_resolv_res_query = ye
+ #define HAVE_LIBRESOLV 1
+ _ACEOF
+ 
+-  LIBS="-lresolv $LIBS"
++  LIBS="${RESOLV_LDFLAGS} $LIBS"
+ 
+ fi
+