Fix 'extraclean' targets

* GNUmakefile: Add description of 'extraclean'.

* Makefile.in (extraclean_dirs): Add lwlib.

* lwlib/Makefile.in (clean mostlyclean extraclean): Add
'extraclean' target.

* lisp/Makefile.in (extraclean): Remove ${loaddefs}, not just
${LOADDEFS}.  Delete all backup and autosave files.

1 files changed, 2 insertions, 0 deletions

diff --git a/GNUmakefile b/GNUmakefile
index f27163840b7..c8d4832aab1 100644
--- a/GNUmakefile
+++ b/GNUmakefile
@@ -50,6 +50,8 @@ help:
 	@echo "make distclean        -- delete all build and configuration files,"
 	@echo "                         leave only files included in source distribution"
 	@echo "make maintainer-clean -- delete almost everything that can be regenerated"
+	@echo "make extraclean       -- like maintainer-clean, and also all generated files,"
+	@echo "                         backup files and autosave files"
 	@echo "make bootstrap        -- delete all compiled files to force a new bootstrap"
 	@echo "                         from a clean slate, then build in the normal way"
 	@echo "make uninstall        -- remove files installed by 'make install'"