Correction for the fix for Bug 3508 - Persistent storage support breaks Linux compatibility.
A 2nd `make install' will fail attempting to create symlink libnvmemmory.so already created by 1st install.
Install should pre-emptively delete it.
#ifndef Py_PYGETOPT_H
#define Py_PYGETOPT_H
#ifdef __cplusplus
extern "C" {
#endif
PyAPI_DATA(int) _PyOS_opterr;
PyAPI_DATA(int) _PyOS_optind;
PyAPI_DATA(char *) _PyOS_optarg;
PyAPI_FUNC(int) _PyOS_GetOpt(int argc, char **argv, char *optstring);
#ifdef __cplusplus
}
#endif
#endif /* !Py_PYGETOPT_H */