2014-06-20 Paul Eggert <eggert@cs.ucla.edu>
+ * configure.ac: Warn about --enable-link-time-optimization's issues
+ in --help message (Bug#17806).
+
Port to GCC 4.9.0 with link time optimization (Bug#17806).
* configure.ac (CFLAGS): With link time optimization,
use -ffat-lto-objects if supported; otherwise Emacs won't