--- pngcrush-1.7.27/Makefile.orig
+++ pngcrush-1.7.27/Makefile
@@ -11,8 +11,8 @@
 # macros --------------------------------------------------------------------
 
 # uncomment these 2 lines only if you are using an external copy of zlib:
-#ZINC = ../../zlib
-#ZLIB = ../../zlib
+ZINC = ../../zlib
+ZLIB = ../../zlib
 
 CC = gcc
 LD = gcc
@@ -20,10 +20,10 @@
 #CFLAGS = -I. -O -Wall
 #CFLAGS = -I. -O2
 #CFLAGS = -I. -O3 -fomit-frame-pointer -Wall
-#CFLAGS = -I. -Os -fomit-frame-pointer -Wall
+CFLAGS = -I. -Os -fomit-frame-pointer -Wall
 #CFLAGS = -I. -O3 -funroll-loops -fomit-frame-pointer -Wall -Wshadow
 # Work around zlib compiler bug in 1.2.6
-CFLAGS = -I. -O3 -funroll-loops -fomit-frame-pointer -Wall -Wshadow -DZ_SOLO
+#CFLAGS = -I. -O3 -funroll-loops -fomit-frame-pointer -Wall -Wshadow -DZ_SOLO
 #CFLAGS = -I${ZINC} -I. -O3 -fomit-frame-pointer -Wall
 # [note that -Wall is a gcc-specific compilation flag ("all warnings on")]
 
@@ -37,15 +37,15 @@
 
 PNGCRUSH  = pngcrush
 
-LIBS = -lm
+LIBS = -lz -lm
 #LIBS = -L${ZLIB} -lz -lm
 #LIBS = ${ZLIB}/libz.a -lm
 
 # uncomment these 4 lines only if you are NOT using an external copy of zlib:
-ZHDR = zlib.h
-ZOBJS  = adler32$(O) compress$(O) crc32$(O) deflate$(O) \
-	 infback$(O) inffast$(O) inflate$(O) inftrees$(O) \
-	 trees$(O) uncompr$(O) zutil$(O)
+#ZHDR = zlib.h
+#ZOBJS  = adler32$(O) compress$(O) crc32$(O) deflate$(O) \
+#	 infback$(O) inffast$(O) inflate$(O) inftrees$(O) \
+#	 trees$(O) uncompr$(O) zutil$(O)
 
 OBJS  = pngcrush$(O) png$(O) pngerror$(O) pngget$(O) pngmem$(O) \
 	pngpread$(O) pngread$(O) pngrio$(O) pngrtran$(O) pngrutil$(O) \