Port to Alpine Linux which uses Busybox

* Makefile.am (check-local): Use plain diff rather than

diff --git a/Makefile.am b/Makefile.am
index e892cdc8bbde3a6b0efa76436fe423f50010677d..738c63ca17115150ba2a7d09d3a33d80840622e3 100644 (file)
--- a/Makefile.am
+++ b/Makefile.am
@@ -111,11 +111,11 @@ FILES_TO_CHECK = $(bin_SCRIPTS) \
   $(top_srcdir)/ChangeLog $(top_srcdir)/configure $(top_srcdir)/gzip.c
 check-local: $(FILES_TO_CHECK) $(bin_PROGRAMS) gzip.doc.gz
        $(AM_V_GEN)$(new_path); { test '$(srcdir)' != . \
-                                   || zdiff -c gzip.doc.gz; }
-       $(AM_V_at)$(new_path); zdiff -c $(srcdir)/gzip.doc $(srcdir)/gzip.doc
+                                   || zdiff gzip.doc.gz; }
+       $(AM_V_at)$(new_path); zdiff $(srcdir)/gzip.doc $(srcdir)/gzip.doc
        $(AM_V_at)$(new_path); zdiff $(srcdir)/gzip.doc gzip.doc.gz
-       $(AM_V_at)$(new_path); zdiff -c - $(srcdir)/gzip.doc <gzip.doc.gz
-       $(AM_V_at)$(new_path); zdiff -c gzip.doc.gz gzip.doc.gz
+       $(AM_V_at)$(new_path); zdiff - $(srcdir)/gzip.doc <gzip.doc.gz
+       $(AM_V_at)$(new_path); zdiff gzip.doc.gz gzip.doc.gz
        $(AM_V_at)$(new_path); zgrep -iV >/dev/null
        $(AM_V_at)$(new_path);                          \
        for opt in --rsyncable '' -1 -9; do             \