bpo-36301: Cleanup preconfig.c and coreconfig.c (GH-12563)
* _PyCoreConfig_Write() now updates _PyRuntime.preconfig
* Remove _PyPreCmdline_Copy()
* _PyPreCmdline_Read() now accepts _PyPreConfig and _PyCoreConfig
optional configurations.
* Rename _PyPreConfig_ReadFromArgv() to _PyPreConfig_Read(). Simplify
the code.
* Calling _PyCoreConfig_Read() no longer adds the warning options
twice: don't add a warning option if it's already in the list.
* Rename _PyCoreConfig_ReadFromArgv() to _PyCoreConfig_Read().
* Rename config_from_cmdline() to _PyCoreConfig_ReadFromArgv().
* Add more assertions on _PyCoreConfig in _PyCoreConfig_Read().
* Move some functions.
* Make some config functions private.
diff --git a/Python/pathconfig.c b/Python/pathconfig.c
index 7fea7c3..10e141a 100644
--- a/Python/pathconfig.c
+++ b/Python/pathconfig.c
@@ -394,7 +394,7 @@
_PyInitError err;
_PyCoreConfig config = _PyCoreConfig_INIT;
- err = _PyCoreConfig_Read(&config);
+ err = _PyCoreConfig_Read(&config, NULL);
if (_Py_INIT_FAILED(err)) {
goto error;
}