bpo-36763: Implement the PEP 587 (GH-13592)

* Add a whole new documentation page:
  "Python Initialization Configuration"
* PyWideStringList_Append() return type is now PyStatus,
  instead of int
* PyInterpreterState_New() now calls PyConfig_Clear() if
  PyConfig_InitPythonConfig() fails.
* Rename files:

  * Python/coreconfig.c => Python/initconfig.c
  * Include/cpython/coreconfig.h => Include/cpython/initconfig.h
  * Include/internal/: pycore_coreconfig.h => pycore_initconfig.h

* Rename structures

  * _PyCoreConfig => PyConfig
  * _PyPreConfig => PyPreConfig
  * _PyInitError => PyStatus
  * _PyWstrList => PyWideStringList

* Rename PyConfig fields:

  * use_module_search_paths => module_search_paths_set
  * module_search_path_env => pythonpath_env

* Rename PyStatus field: _func => func
* PyInterpreterState: rename core_config field to config
* Rename macros and functions:

  * _PyCoreConfig_SetArgv() => PyConfig_SetBytesArgv()
  * _PyCoreConfig_SetWideArgv() => PyConfig_SetArgv()
  * _PyCoreConfig_DecodeLocale() => PyConfig_SetBytesString()
  * _PyInitError_Failed() => PyStatus_Exception()
  * _Py_INIT_ERROR_TYPE_xxx enums => _PyStatus_TYPE_xxx
  * _Py_UnixMain() => Py_BytesMain()
  * _Py_ExitInitError() => Py_ExitStatusException()
  * _Py_PreInitializeFromArgs() => Py_PreInitializeFromBytesArgs()
  * _Py_PreInitializeFromWideArgs() => Py_PreInitializeFromArgs()
  * _Py_PreInitialize() => Py_PreInitialize()
  * _Py_RunMain() => Py_RunMain()
  * _Py_InitializeFromConfig() => Py_InitializeFromConfig()
  * _Py_INIT_XXX() => _PyStatus_XXX()
  * _Py_INIT_FAILED() => _PyStatus_EXCEPTION()

* Rename 'err' PyStatus variables to 'status'
* Convert RUN_CODE() macro to config_run_code() static inline function
* Remove functions:

  * _Py_InitializeFromArgs()
  * _Py_InitializeFromWideArgs()
  * _PyInterpreterState_GetCoreConfig()

1 files changed, 4 insertions, 4 deletions

diff --git a/Python/errors.c b/Python/errors.c
index 831f111..bd33d4d 100644
--- a/Python/errors.c
+++ b/Python/errors.c
@@ -2,7 +2,7 @@
 /* Error handling */
 
 #include "Python.h"
-#include "pycore_coreconfig.h"
+#include "pycore_initconfig.h"
 #include "pycore_pyerrors.h"
 #include "pycore_pystate.h"
 #include "pycore_traceback.h"
@@ -1090,16 +1090,16 @@ static PyStructSequence_Desc UnraisableHookArgs_desc = {
 };
 
 
-_PyInitError
+PyStatus
 _PyErr_Init(void)
 {
     if (UnraisableHookArgsType.tp_name == NULL) {
         if (PyStructSequence_InitType2(&UnraisableHookArgsType,
                                        &UnraisableHookArgs_desc) < 0) {
-            return _Py_INIT_ERR("failed to initialize UnraisableHookArgs type");
+            return _PyStatus_ERR("failed to initialize UnraisableHookArgs type");
         }
     }
-    return _Py_INIT_OK();
+    return _PyStatus_OK();
 }