Author: Daniel Baumann <daniel.baumann@progress-linux.org>
Description: Adding compatibility for current kernel versions to fix FTBFS.

diff -Naurp postfix.orig/makedefs postfix/makedefs
--- postfix.orig/makedefs
+++ postfix/makedefs
@@ -557,7 +557,11 @@ EOF
 		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
 		: ${PLUGIN_LD="${CC-gcc} -shared"}
 		;;
- Linux.[345].*)	SYSTYPE=LINUX$RELEASE_MAJOR
+ Linux.[34567].*)
+		case "$SYSTEM.$RELEASE" in
+		  Linux.[345].*) SYSTYPE=LINUX$RELEASE_MAJOR ;;
+		  Linux.[67].*) SYSTYPE=LINUX5 ;;
+		esac
 		case "$CCARGS" in
 		 *-DNO_DB*) ;;
 		 *-DHAS_DB*) ;;