以后发布emacs 的windows编译版必须提供相应源代码了
http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=c4be80112556e06bd7e92138e44051cc8c62e709
+IMPORTANT LEGAL REMINDER
+========================
+If you want to redistribute any of the precompiled distributions of
+Emacs, be careful to check the implications of the GPL. For instance,
+if you put the compiled file from this directory on an Internet site,
+you must arrange to distribute the source files of the SAME version.
+Making a link to our copy of the source is NOT sufficient, since we
+might upgrade to a new version while you are still distributing the
+old binaries.