Ticket #3603: check-jam-version.patch

Jamfile

@@ -1 +1 @@
 SubDir HAIKU_TOP ;
 
+HAIKU_REQUIRED_JAM_VERSION = 2.5-haiku-20100424 ;
+if $(JAMVERSION) != $(HAIKU_REQUIRED_JAM_VERSION) {
+    Echo "error: jam version $(HAIKU_REQUIRED_JAM_VERSION) is required." ;
+    Echo "For instructions on building and installing jam, " ;
+    Echo "See www.haiku-os.org/guides/building/jam" ;
+    Exit ;
+}
+
 NotFile alltests ;
 Depends alltests : r5tests obostests ;