runtrang, fail if not found

diff --git a/website/schema/relaxng/Makefile b/website/schema/relaxng/Makefile
index bb2d7a06816f9acbd66a088961db526f02bb2968..b6ada2e0ff9e2cbe73a5ba455fbc0eb81067ccf9 100644 (file)
--- a/website/schema/relaxng/Makefile
+++ b/website/schema/relaxng/Makefile
@@ -1,5 +1,9 @@
 include ../../../cvstools/Makefile.incl
 
+ifeq ($(RUNTRANG),)
+$(error Cannot find "runtrang" script. Please do a "cvs update" of your cvstools directory)
+endif
+
 VPATH=../dtd
 
 RDDLNS=http://www.rddl.org/