--- Makefile.unx.orig	Fri Nov 19 12:39:03 1999
+++ Makefile.unx	Wed Nov 22 21:28:00 2000
@@ -23,13 +23,13 @@
 #ZLIB = -L$(ZPATH) -lz
 ZLIB = $(ZPATH)/libz.a
 
-INCS = $(ZINC)
-LIBS = $(ZLIB)
+INCS =
+LIBS = -lz
 
-CC = gcc
-LD = gcc
+CC ?= gcc
+LD = $(CC)
 RM = rm
-CFLAGS = -O3 -Wall $(INCS) -DUSE_ZLIB
+CFLAGS += $(INCS) -DUSE_ZLIB
 # [note that -Wall is a gcc-specific compilation flag ("all warnings on")]
 O = .o
 E =