I'm porting, embedding and extending Python in a very limited environment.

This environment does not have utime.h and have not defined the
following function:

int utime(const char *, const struct utimbuf *);

Although the function called utimes, defined in sys/time.h exist.

int utimes(const char *path, const struct timeval times[2]);


In the method, in posixmodule.c:

static PyObject *
posix_utime(PyObject *self, PyObject *args);

usage of these methods are used. If a time is specified in args, a
define determines which of the two methods to use, utime or utimes
depending if these exist or not.

If Py_None is sent instead utime is always used, the solution to solve
this is to use #ifdef with HAVE_UTIMES.

Line number 2835 in
http://svn.python.org/projects/python/trunk/Modules/posixmodule.c

I have not checked if this is solved in future versions.