I've made a new version of binutils available for installation. This is a refresh against the official git repository. The binutils package contains the GNU assembler, linker and binary utilities. It is available in the "Devel" category under Cygwin's setup.
This update contains many bug fixes but the primary Cygwin-specific improvement is mentioned here: http://cygwin.com/ml/cygwin/2014-03/msg00212.html