> It looks like my reluctance to add gettimeofday to core without using
> it there was well founded.  Simply adding a dummy call to
> _PyTime_gettimeofday in main() fixed the build problem.

It's rather strange. I'm sure we have external API functions which never
get called in the core. Just a couple of attempts found one candidate:

$ grep -r _PyImport_IsScript Modules/ Objects/ Python/ Include/
Python/import.c:1804:PyAPI_FUNC(int) _PyImport_IsScript(struct filedescr * fd)
Include/import.h:43:PyAPI_FUNC(int) _PyImport_IsScript(struct filedescr *);