3006 VERIFY[S,U,P] and ASSERT[S,U,P] frequently check if first argument is zero

@@ -44,11 +44,11 @@
 C99MODE=        -xc99=%all
 C99LMODE=       -Xc99=%all
 
 CFLAGS += $(CCVERBOSE)
 CFLAGS64 += $(CCVERBOSE)
-CPPFLAGS += -D_LARGEFILE64_SOURCE=1 -D_REENTRANT $(INCS)
+CPPFLAGS += -D_LARGEFILE64_SOURCE=1 -D_REENTRANT -DDEBUG $(INCS)
 
 .KEEP_STATE:
 
 all: $(PROG)