I get the following warnings when compiling msvcp60:
main.c:108:51: warning: ‘std_BADOFF_func’ defined but not used [-Wunused-function] misc.c:66:40: warning: ‘mutex_mutex_lock’ defined but not used [-Wunused-function] misc.c:73:40: warning: ‘mutex_mutex_unlock’ defined but not used [-Wunused-function] misc.c:80:40: warning: ‘mutex_mutex_ctor’ defined but not used [-Wunused-function] misc.c:87:40: warning: ‘mutex_mutex_dtor’ defined but not used [-Wunused-function] misc.c:175:58: warning: ‘set_new_handler_reset’ defined but not used [-Wunused-function]
Indeed msvcp60.spec contains no _BADOFF, _Mutex or set_new_handler function. I don't see them in my 'database' of exported Windows APIs for msvcp60 but maybe the Windows dlls I built it from where not entirely up to date. Still it looks like these were added in later revisions and thus can be removed from the above files.
misc.c:127:50: warning: ‘wctype’ defined but not used [-Wunused-function]
This one is actually forwarded to msvcp90 according to msvcp60.spec, thus making this implementation redundant. So it should either be removed or msvcp60.spec should be modified.