diff -urp pngquant-2.4.0.1.orig/Makefile pngquant-2.4.0.1/Makefile
--- pngquant-2.4.0.1.orig/Makefile	2015-04-11 23:24:38.000000000 +0100
+++ pngquant-2.4.0.1/Makefile	2015-04-18 23:53:29.737846589 +0100
@@ -11,6 +11,7 @@ OBJS += $(COCOA_OBJS)
 endif
 
 STATICLIB = lib/libimagequant.a
+SHAREDLIB = lib/libimagequant.so.0
 
 DISTFILES = *.[chm] pngquant.1 Makefile configure README.md INSTALL CHANGELOG COPYRIGHT
 TARNAME = pngquant-$(VERSION)
@@ -29,12 +30,17 @@ staticlib:
 
 $(STATICLIB): config.mk staticlib
 
+sharedlib:
+	$(MAKE) -C lib shared
+
+$(SHAREDLIB): config.mk sharedlib
+
 $(OBJS): $(wildcard *.h) config.mk
 
 rwpng_cocoa.o: rwpng_cocoa.m
 	$(CC) -Wno-enum-conversion -c $(CFLAGS) -o $@ $< || clang -Wno-enum-conversion -c -O3 $(CFLAGS) -o $@ $<
 
-$(BIN): $(OBJS) $(STATICLIB)
+$(BIN): $(OBJS) $(SHAREDLIB)
 	$(CC) $^ $(LDFLAGS) -o $@
 
 test: $(BIN)
@@ -60,7 +66,7 @@ uninstall:
 
 clean:
 	$(MAKE) -C lib clean
-	rm -f '$(BIN)' $(OBJS) $(COCOA_OBJS) $(STATICLIB) $(TARFILE)
+	rm -f '$(BIN)' $(OBJS) $(COCOA_OBJS) $(SHAREDLIB) $(TARFILE)
 
 distclean: clean
 	$(MAKE) -C lib distclean