Index: ./src/configure.in
===================================================================
RCS file: /cvsroot/ecls/ecl/src/configure.in,v
retrieving revision 1.255
diff -u -r1.255 configure.in
--- ./src/configure.in	4 Jan 2011 21:50:05 -0000	1.255
+++ ./src/configure.in	16 Jan 2011 00:23:37 -0000
@@ -326,6 +326,7 @@
 AC_PROG_MAKE_SET      # set $(MAKE) if needed
 AC_PROG_RANLIB        # set variable RANLIB
 AC_CHECK_TOOL([AR],[ar]) # set variable AR to appropriate `ar' program
+AC_CHECK_PROGS([ETAGS],[etags emacs-etags]) # set variable ETAGS to etags program if found
 
 dnl -----------------------------------------------------------------------
 dnl Checks which do not come with autoconf (must be after AC_PROG_CC)
Index: ./src/Makefile.in
===================================================================
RCS file: /cvsroot/ecls/ecl/src/Makefile.in,v
retrieving revision 1.115
diff -u -r1.115 Makefile.in
--- ./src/Makefile.in	14 Jan 2011 23:11:49 -0000	1.115
+++ ./src/Makefile.in	16 Jan 2011 00:23:37 -0000
@@ -18,6 +18,7 @@
 RM	= @RM@
 LN_S	= @LN_S@
 EXE	= @EXEEXT@
+ETAGS	= @ETAGS@
 
 # ==================== Where To Install Things ====================
 
@@ -193,7 +194,6 @@
 	$(mkinstalldirs) $(DESTDIR)$(mandir)/man$(manext)
 	$(INSTALL_DATA) doc/ecl.man $(DESTDIR)$(mandir)/man$(manext)/ecl.$(manext)
 	$(INSTALL_DATA) doc/ecl-config.man $(DESTDIR)$(mandir)/man$(manext)/ecl-config.$(manext)
-	done
 
 flatinstall: build-stamp
 	$(MAKE) DESTDIR=$(DESTDIR) bindir=$(prefix) libdir=$(prefix) \
@@ -247,9 +247,10 @@
 # This rule is allowed to fail when etags does not exist.
 TAGS:
 	echo > $@;
+	test $ETAGS && \
 	-srcfiles=`find $(srcdir)/c/ $(srcdir)/h/ -name '*.[chd]'`; \
-	etags --language=c    -o $@ $$srcfiles && \
-	etags --language=none -o $@ --append \
+	$ETAGS --language=c    -o $@ $$srcfiles && \
+	$ETAGS --language=none -o $@ --append \
 	      --regex='/@\([-:*a-zA-z]+\)/\1/' \
 	      --regex='/@(defun \([-:*a-zA-z]+\)/\1/' \
 	      $$srcfiles