diff -ru rpm-5.2.1.orig//configure.ac rpm-5.2.1/configure.ac
--- rpm-5.2.1.orig//configure.ac	2010-07-28 13:19:12.295008236 +0200
+++ rpm-5.2.1/configure.ac	2010-07-28 13:18:25.877741081 +0200
@@ -1606,7 +1606,7 @@
 esac
 RPMCANONVENDOR="$target_vendor"
 case "${target_vendor}" in
-unknown|pc|ibm|redhat|pld|mandriva|conectiva|lvr|yellowdog|caos|crux|ark)
+unknown|pc|ibm|redhat|pld|mandriva|conectiva|lvr|yellowdog|caos|crux|ark|openmamba)
 	test -f /etc/redhat-release &&		RPMCANONVENDOR=redhat
 	test -f /etc/pld-release &&		RPMCANONVENDOR=pld
 	test -f /etc/mandriva-release &&	RPMCANONVENDOR=mandriva
@@ -1616,6 +1616,7 @@
 	test -f /etc/caos-release &&		RPMCANONVENDOR=caos
 	test -f /usr/bin/crux &&		RPMCANONVENDOR=crux
 	test -f /etc/ark-release &&		RPMCANONVENDOR=ark
+	test -f /etc/openmamba-release &&	RPMCANONVENDOR=openmamba
 	;;
 esac
 RPMCANONOS="$target_os_noversion"
@@ -1913,7 +1914,7 @@
 AC_MSG_CHECKING([if building for a specfic vendor])
 AC_ARG_WITH(
     [vendor],
-    AS_HELP_STRING([--with-vendor=VENDOR], [build with a supported vendor's specific set of changes: mandriva, ark, fedora]),
+    AS_HELP_STRING([--with-vendor=VENDOR], [build with a supported vendor's specific set of changes: mandriva, ark, fedora, openmamba]),
     [if test ".$withval" != .no; then
 	    case "$withval" in
 	    "mandriva")
@@ -1925,6 +1926,9 @@
 	    "fedora")
 		    AC_DEFINE([RPM_VENDOR_FEDORA], 1, Vendor is Fedora)
 		    ;;
+	    "openmamba")
+		    AC_DEFINE([RPM_VENDOR_OPENMAMBA], 1, Vendor is openmamba)
+		    ;;
 	    esac
 	    AC_MSG_RESULT([$withval])
     else
--- rpm-5.2.1.orig/config.h.in	2010-05-01 19:03:00.000000000 +0200
+++ rpm-5.2.1/config.h.in	2010-07-28 14:17:07.456750377 +0200
@@ -798,6 +798,9 @@
 /* Vendor is Mandriva */
 #undef RPM_VENDOR_MANDRIVA
 
+/* Vendor is openmamba */
+#undef RPM_VENDOR_OPENMAMBA
+
 /* The size of `char', as computed by sizeof. */
 #undef SIZEOF_CHAR