+
+The second tool is a method to allow switching to a new tags and/or cscope
+database. This is especially useful for mkbuild, which can build the same
+code for multiple platforms, and each platform build directory contains its
+own tags and cscope database files.
+
+Map mkbuild#SelectXref() to some key, such as:
+nnoremap <leader>x :call mkbuild#SelectXref()<CR>
+