diff -rupN --no-dereference libimagequant-2.14.0/Makefile libimagequant-2.14.0-new/Makefile

--- libimagequant-2.14.0/Makefile	2021-01-27 17:20:26.000000000 +0100

+++ libimagequant-2.14.0-new/Makefile	2021-01-28 13:26:22.023156465 +0100

@@ -114,7 +114,7 @@ install: all $(PKGCONFIG)

 	install -d $(DESTDIR)$(PKGCONFIGDIR)

 	install -d $(DESTDIR)$(INCLUDEDIR)

 	install -m 644 $(STATICLIB) $(DESTDIR)$(LIBDIR)/$(STATICLIB)

-	install -m 644 $(SHAREDLIBVER) $(DESTDIR)$(LIBDIR)/$(SHAREDLIBVER)

+	install -m 755 $(SHAREDLIBVER) $(DESTDIR)$(LIBDIR)/$(SHAREDLIBVER)

 	ln -sf $(SHAREDLIBVER) $(DESTDIR)$(LIBDIR)/$(SHAREDLIB)

 	install -m 644 $(PKGCONFIG) $(DESTDIR)$(PKGCONFIGDIR)/$(PKGCONFIG)

 	install -m 644 libimagequant.h $(DESTDIR)$(INCLUDEDIR)/libimagequant.h