+2013-09-05 Dmitry Antipov <dmantipov@yandex.ru>
+
+ Make --without-x compatible with --enable-gcc-warnings.
+ * configure.ac: If both --without-x and --enable-gcc-warnings are
+ specified, use -Wno-unused-variable, -Wno-unused-but-set-variable
+ and -Wno-unused-but-set-parameter.
+
2013-09-04 Paul Eggert <eggert@cs.ucla.edu>
Makefile improvements.