diff -ru optipng-0.5.4/lib/pngxtern/scripts/gcc.mak optipng-0.5.4.patched/lib/pngxtern/scripts/gcc.mak
--- optipng-0.5.4/lib/pngxtern/scripts/gcc.mak	2006-11-23 12:05:53.000000000 +0100
+++ optipng-0.5.4.patched/lib/pngxtern/scripts/gcc.mak	2006-11-23 12:05:55.000000000 +0100
@@ -39,7 +39,7 @@
 all: pngxtern$(A)
 
 .c$(O):
-	$(CC) -c $(CFLAGS) -I$(ZDIR) -I$(PNGDIR) $<
+	$(CC) -c $(CFLAGS)  $<
 
 pngxtern$(A): $(OBJS)
 	$(AR_RC) $@ $(OBJS)
diff -ru optipng-0.5.4/src/scripts/gcc.mak optipng-0.5.4.patched/src/scripts/gcc.mak
--- optipng-0.5.4/src/scripts/gcc.mak	2006-11-23 12:05:22.000000000 +0100
+++ optipng-0.5.4.patched/src/scripts/gcc.mak	2006-11-23 12:05:21.000000000 +0100
@@ -19,24 +19,20 @@
 ZLIB     = libz.a
 PNGLIB   = libpng.a
 PNGXLIB  = pngxtern.a
-ZMAK     = Makefile
-PNGMAK   = scripts/makefile.gcc
 PNGXMAK  = scripts/gcc.mak
-ZDIR     = ../lib/zlib
-PNGDIR   = ../lib/libpng
 PNGXDIR  = ../lib/pngxtern
 BACKHERE = ../../src
 
 OBJS = optipng.o opngio.o opngreduc.o cbitset.o osys.o strutil.o
-LIBS = $(PNGXDIR)/$(PNGXLIB) $(PNGDIR)/$(PNGLIB) $(ZDIR)/$(ZLIB)
+LIBS = $(PNGXDIR)/$(PNGXLIB)
 
 
 $(OPTIPNG): $(OBJS) $(LIBS)
-	$(LD) -o $(OPTIPNG) $(LDFLAGS) $(OBJS) $(LIBS)
+	$(LD) -o $(OPTIPNG) $(LDFLAGS) $(OBJS) $(LIBS) -lpng -lz
 
 
 .c.o:
-	$(CC) -c $(CFLAGS) -I$(ZDIR) -I$(PNGDIR) -I$(PNGXDIR) $*.c
+	$(CC) -c $(CFLAGS) -I$(PNGXDIR) $*.c
 
 optipng.o  : optipng.c proginfo.h opng.h cexcept.h cbitset.h osys.h strutil.h
 opngio.o   : opngio.c opng.h
@@ -46,23 +42,11 @@
 strutil.o  : strutil.c strutil.h
 
 
-$(PNGXDIR)/$(PNGXLIB): $(ZDIR)/$(ZLIB) $(PNGDIR)/$(PNGLIB)
+$(PNGXDIR)/$(PNGXLIB):
 	cd $(PNGXDIR); \
 	$(MAKE) -f $(PNGXMAK) $(PNGXLIB); \
 	cd $(BACKHERE)
 
-$(PNGDIR)/$(PNGLIB): $(ZDIR)/$(ZLIB)
-	cd $(PNGDIR); \
-	$(MAKE) -f $(PNGMAK) $(PNGLIB); \
-	cd $(BACKHERE)
-
-$(ZDIR)/$(ZLIB):
-	cd $(ZDIR); \
-	./configure; \
-	$(MAKE) -f $(ZMAK) $(ZLIB); \
-	cd $(BACKHERE)
-
-
 install: $(OPTIPNG)
 	-@if [ ! -d ${bindir} ]; then mkdir -p ${bindir}; fi
 	-@if [ ! -d ${man1dir} ]; then mkdir -p ${man1dir}; fi
@@ -82,9 +66,3 @@
 	cd $(PNGXDIR); \
 	$(MAKE) -f $(PNGXMAK) clean; \
 	cd $(BACKHERE)
-	cd $(PNGDIR); \
-	$(MAKE) -f $(PNGMAK) clean; \
-	cd $(BACKHERE)
-	cd $(ZDIR); \
-	$(MAKE) -f $(ZMAK) clean; \
-	cd $(BACKHERE)