X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=mk%2Ftarget.mk;h=cc5aec7b3331b7c8cab487694131f087d51f36fe;hp=73ef01fca63acae79227ca45da703dec0afeab83;hb=4bcd03a67e66e584da936d38ac91e3d72bf9cf78;hpb=8dbb5f0f254ca3d899d9d28be33703eac988f345

diff --git a/mk/target.mk b/mk/target.mk
index 73ef01f..cc5aec7 100644
--- a/mk/target.mk
+++ b/mk/target.mk
@@ -1034,6 +1034,11 @@ maintainer-clean:: extraclean
 # Expects:	$(WAYS)			the possible "way" strings to one of 
 #					which $(way) will be set
 
+ifneq "$(way)" ""
+ifeq "$(findstring $(way), $(WAYS))" ""
+$(error Unknown way $(way))
+endif
+endif
 
 # So how does $(way) ever get set to anything?  Answer, we recursively
 # invoke make, setting $(way) on the command line.