bpo-36763: Add _Py_InitializeMain() (GH-13362)
* Add a private _Py_InitializeMain() function.
* Add again _PyCoreConfig._init_main.
* _Py_InitializeFromConfig() now uses _init_main to decide
if _Py_InitializeMainInterpreter() should be called.
* _PyCoreConfig: rename _frozen to pathconfig_warnings, its value is
now the opposite of Py_FrozenFlag.
* Add an unit test for _init_main=0 and _Py_InitializeMain().
diff --git a/Include/cpython/pylifecycle.h b/Include/cpython/pylifecycle.h
index 2366c77..a3ab6c9 100644
--- a/Include/cpython/pylifecycle.h
+++ b/Include/cpython/pylifecycle.h
@@ -40,6 +40,7 @@
const _PyCoreConfig *config,
int argc,
wchar_t **argv);
+PyAPI_FUNC(_PyInitError) _Py_InitializeMain(void);
PyAPI_FUNC(int) _Py_RunMain(void);