Although the claim that using the -Wno-unused-but-set-variable flag
breaks the build for older GCCs is unsubstantiated at this time, the
previous fix for gcc47 is removed in favor of deleting -Werror which
is exactly what the cross/binutils makefile does.
MinGW, a contraction of "Minimalist GNU for Windows," is a port
of the GNU Compiler Collection (GCC), and GNU Binutils, for use
in the development of native Microsoft Windows applications.
