Create tarballs through an Automake-like "make dist" command.

Makefile.in

@@ -1,6 +1,6 @@
 # Makefile for gperf
 
-# Copyright (C) 1989, 1992, 1993, 1998, 2002 Free Software Foundation, Inc.
+# Copyright (C) 1989, 1992, 1993, 1998, 2002, 2012 Free Software Foundation, Inc.
 # Written by Douglas C. Schmidt <schmidt@ics.uci.edu>
 # and Bruno Haible <bruno@clisp.org>.
 #
@@ -58,5 +58,42 @@ maintainer-clean : force
 	cd @subdir@; if test -f Makefile; then $(MAKE) maintainer-clean; fi
 	$(RM) config.status config.log config.cache Makefile
 
+# List of source files.
+SOURCE_FILES = \
+  README README.woe32 README.vms NEWS AUTHORS \
+  configure.ac aclocal.m4 Makefile.in Makefile.msvc Makefile.vms \
+  Makefile.devel ChangeLog
+# List of distributed files imported from other packages.
+IMPORTED_FILES = COPYING INSTALL mkinstalldirs
+# List of distributed files generated by autotools or Makefile.devel.
+GENERATED_FILES = configure
+# List of distributed files generated by "make".
+DISTRIBUTED_BUILT_FILES =
+# List of distributed files.
+DISTFILES = $(SOURCE_FILES) $(IMPORTED_FILES) $(GENERATED_FILES) $(DISTRIBUTED_BUILT_FILES)
+
+distdir : $(DISTFILES)
+	for file in $(DISTFILES); do \
+	  if test -f $$file; then dir='.'; else dir='$(srcdir)'; fi; \
+	  cp -p $$dir/$$file '$(distdir)'/$$file || exit 1; \
+	done
+	subdir=@subdir@; test -d '$(distdir)'/$$subdir || mkdir '$(distdir)'/$$subdir; cd $$subdir; $(MAKE) distdir distdir='$(distdir)'/$$subdir
+
+# Creating a distribution tarball.
+PACKAGE = gperf
+VERSION = `sed -n -e 's/.*version_string = "\(.*\)".*/\1/p' < src/version.cc`
+TAR = tar
+GZIP = gzip
+
+dist : force
+	tmpdistdir=$(PACKAGE)-$(VERSION); \
+	abstmpdistdir=`pwd`/$$tmpdistdir; \
+	rm -rf $$tmpdistdir $$tmpdistdir.tar $$tmpdistdir.tar.gz \
+	  && mkdir $$tmpdistdir \
+	  && $(MAKE) distdir distdir="$$abstmpdistdir" \
+	  && $(TAR) chof $$tmpdistdir.tar --owner=root --group=root $$tmpdistdir \
+	  && $(GZIP) -9 $$tmpdistdir.tar \
+	  && rm -rf $$tmpdistdir
+
 force :