There are three kinds of target files that may be built: archive,
library, and runtime.  Executables are always treated as runtime
targets.  Static libraries are always treated as archive targets.
Module libraries are always treated as library targets.  For
non-DLL platforms shared libraries are treated as library
targets.  For DLL platforms the DLL part of a shared library is
treated as a runtime target and the corresponding import library
is treated as an archive target.  All Windows-based systems
including Cygwin are DLL platforms.