Make tar file generation closer to reproducible

diff --git a/Makefile.in b/Makefile.in
index cc3fadd78352e31ff598879539897ba763848570..9399985010d3f7c1b606f2702ff85cf338dd90a6 100644 (file)
--- a/Makefile.in
+++ b/Makefile.in
@@ -648,8 +648,9 @@ distdir: $(DISTFILES)
          mkdir "$$sd" && $(MAKE) -C $$d distdir="`cd $$sd && pwd`" $@ ; \
        done
 
+TAR_OPTIONS = --owner=0 --group=0 --numeric-owner --sort=name --mode=go+u,go-w --format=ustar
 dist: distdir
-       tar cf - $(distdir) | gzip -c >$(distdir).tar.gz        
+       TAR_OPTIONS="$(TAR_OPTIONS)" tar cf - $(distdir) | gzip -c >$(distdir).tar.gz
        rm -rf $(distdir)
 
 rm_distcheck = test ! -d distcheck-tmp \