Description: GNU make allows only one % in substition,
 http://www.gnu.org/software/make/manual/html_node/Text-Functions.html
Index: corelibs/usr/src/lib/libumem/Makefile.com
===================================================================
--- corelibs.orig/usr/src/lib/libumem/Makefile.com	2012-10-08 04:25:42.000000000 +0400
+++ corelibs/usr/src/lib/libumem/Makefile.com	2012-10-26 01:49:01.472414660 +0400
@@ -143,7 +143,8 @@
 	snprintf \
 	vsnprintf
 
-CPPFLAGS_standalone = -DUMEM_STANDALONE $(STAND_RENAMED_FUNCS:%=-D%=umem_%)
+CPPFLAGS_standalone = -DUMEM_STANDALONE \
+					  $(foreach _my_var,$(STAND_RENAMED_FUNCS),-D$(_my_var)=umem_$(_my_var))
 CPPFLAGS_library = -D_REENTRANT
 CPPFLAGS +=	-I../common -I../../common/inc $(CPPFLAGS_$(CURTYPE))