DONE

• linked to static runtime libraries by -MT to provide missing obj files (some ucrt source code missing, e.g. math library).
• linked to OneCore_apiset.lib instead of kernel32.lib.
• corecrt_internal_state_isolation.h reverse-engineered, the core header to support dual state globals (including per-thread-data PTD, actually per-fiber-data).
• nt.h completed referenced fields of _TEB and _PEB.
• config.h defined macros required for compiling.
• oswrappers.cpp defined all twin functions (prefixed with _o_) to access the OS copy of dual state globals.
• ucrtbase.def exported all symbols.
• matherr.cpp defined dual_state_global user_matherr. It is needed since static ucrt library does not use global states.

TODO

• check whether linking to msvcrt is needed other than libcmt.
• check whether linked static runtime libraries libcurt and libvcruntime contain obj files that defines dual state globals. If yes, the obj files need to be reverse-engineered.