Small Makefile cleanup mainly related to tags file generation

* src/Makefile.in (abs_srcdir): New, set by configure.
(maintainer-clean): Remove pointless echo.  That should be in the
top-level Makefile, if anywhere.  Delete TAGS-LISP.
(extraclean): No s/ and m/ directories for some time.
(TAGS): Remove no-longer-defined S_FILE.
Pass absolute filenames to etags once more.
(TAGS-LISP, $(lwlibdir)/TAGS): Correctly pass ETAGS to sub-makes.
($(lwlibdir)/TAGS): Remove useless subshell, check cd return value.

* lisp/Makefile.in (lisptagsfiles1, lisptagsfiles2, lisptagsfiles3)
(lisptagsfiles4): Use absolute filenames again.
(TAGS, TAGS-LISP): Not everything needs to run in one line.
Remove all *loaddefs files, not just the first.  Remove esh-groups.
(maintainer-clean): Delete TAGS, TAGS-LISP.

* lwlib/Makefile.in (abs_srcdir): New, set by configure.
(ETAGS, ctagsfiles): New variables.
(TAGS): Use ETAGS, ctagsfiles.  Use absolute filenames again.

2 files changed, 19 insertions, 2 deletions

diff --git a/lwlib/ChangeLog b/lwlib/ChangeLog
index 963b5baed1c..6d10fe551cb 100644
--- a/lwlib/ChangeLog
+++ b/lwlib/ChangeLog
@@ -1,3 +1,9 @@
+2013-11-02  Glenn Morris  <rgm@gnu.org>
+
+        * Makefile.in (abs_srcdir): New, set by configure.
+        (ETAGS, ctagsfiles): New variables.
+        (TAGS): Use ETAGS, ctagsfiles.  Use absolute filenames again.
+
 2013-10-24  Glenn Morris  <rgm@gnu.org>
 
         * Makefile.in (abs_top_srcdir): New, set by configure.
diff --git a/lwlib/Makefile.in b/lwlib/Makefile.in
index b7f1673aca9..550983c1757 100644
--- a/lwlib/Makefile.in
+++ b/lwlib/Makefile.in
@@ -23,6 +23,7 @@
 # and set up to be configured by ../configure.
 
 srcdir=@srcdir@
+abs_srcdir=@abs_srcdir@
 # MinGW CPPFLAGS may use this.
 abs_top_srcdir=@abs_top_srcdir@
 VPATH=@srcdir@
@@ -100,7 +101,17 @@ distclean: clean
 maintainer-clean: distclean
         rm -f TAGS
 
-TAGS:
-        ../lib-src/etags $(srcdir)/*.[ch]
+
+ETAGS = ../lib-src/etags
+
+## FIXME?  Does etags need to use absolute filenames?
+## See comments in lisp/Makefile.in, src/Makefile.in.
+ctagsfiles= *.[ch]
+
+TAGS: $(srcdir)/$(ctagsfiles)
+        "$(ETAGS)" "$(abs_srcdir)"/$(ctagsfiles)
 tags: TAGS
 .PHONY: tags
+
+
+### Makefile.in ends here