cpython/Modules/getbuildinfo.c

#ifndef Py_BUILD_CORE_BUILTIN
#define Py_BUILD_CORE_MODULE …
#endif

#include "Python.h"
#include "pycore_pylifecycle.h"   // _Py_gitidentifier()

#ifndef DONT_HAVE_STDIO_H
#include <stdio.h>
#endif

#ifndef DATE
#ifdef __DATE__
#define DATE …
#else
#define DATE …
#endif
#endif

#ifndef TIME
#ifdef __TIME__
#define TIME …
#else
#define TIME …
#endif
#endif

/* XXX Only unix build process has been tested */
#ifndef GITVERSION
#define GITVERSION …
#endif
#ifndef GITTAG
#define GITTAG …
#endif
#ifndef GITBRANCH
#define GITBRANCH …
#endif

static int initialized = …;
static char buildinfo[50 + sizeof(GITVERSION) +
                      ((sizeof(GITTAG) > sizeof(GITBRANCH)) ?
                       sizeof(GITTAG) : sizeof(GITBRANCH))];

const char *
Py_GetBuildInfo(void)
{ … }

const char *
_Py_gitversion(void)
{ … }

const char *
_Py_gitidentifier(void)
{ … }