maint: also distribute a zip-compressed tarball

* configure.ac (AM_INIT_AUTOMAKE): Add dist-zip, for
those lacking gzip, 7zip, etc.  Suggested by Karl Berry in
https://bugs.gnu.org/25538.

diff --git a/configure.ac b/configure.ac
index dc0751deaf849734a864dbe7d43565234099a7fa..05aa68135dd81eabe31bf5f4c529caa90c362743 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -28,7 +28,8 @@ AC_CONFIG_SRCDIR([gzip.c])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
 AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
-AM_INIT_AUTOMAKE([1.11 subdir-objects dist-xz color-tests parallel-tests])
+AM_INIT_AUTOMAKE([1.11 subdir-objects dist-xz dist-zip
+                  color-tests parallel-tests])
 AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.
 
 dnl POSIXCHECK is worthwhile for maintainers, but adds several seconds