bpo-32197: Try to fix a compiler error on OS X introduced in bpo-32030. (#4681)

* Revert "bpo-32030: _PyPathConfig_Init() sets home and program_name (#4673)"

This reverts commit af5a895.

* Revert "bpo-32030: Fix config_get_program_name() on macOS (#4669)"

This reverts commit e23c06e.

* Revert "bpo-32030: Add Python/pathconfig.c (#4668)"

This reverts commit 0ea395a.

* Revert "bpo-32030: Don't call _PyPathConfig_Fini() in Py_FinalizeEx() (#4667)"

This reverts commit ebac19d.

* Revert "bpo-32030: Fix Py_GetPath(): init program_name (#4665)"

This reverts commit 9ac3d88.

Author: serhiy-storchaka

Doc/c-api/init.rst

@@ -40,6 +40,7 @@ The following functions can be safely called before Python is initialized:
   * :c:func:`Py_GetCompiler`
   * :c:func:`Py_GetCopyright`
   * :c:func:`Py_GetPlatform`
+  * :c:func:`Py_GetProgramName`
   * :c:func:`Py_GetVersion`
 
 * Utilities:
@@ -58,8 +59,8 @@ The following functions can be safely called before Python is initialized:
    The following functions **should not be called** before
    :c:func:`Py_Initialize`: :c:func:`Py_EncodeLocale`, :c:func:`Py_GetPath`,
    :c:func:`Py_GetPrefix`, :c:func:`Py_GetExecPrefix`,
-   :c:func:`Py_GetProgramFullPath`, :c:func:`Py_GetPythonHome`,
-   :c:func:`Py_GetProgramName` and :c:func:`PyEval_InitThreads`.
+   :c:func:`Py_GetProgramFullPath`, :c:func:`Py_GetPythonHome` and
+   :c:func:`PyEval_InitThreads`.
 
 
 .. _global-conf-vars:

Include/internal/pystate.h

@@ -48,36 +48,9 @@ typedef struct {
 #endif
     /* Set by Py_SetPath(), or computed by _PyPathConfig_Init() */
     wchar_t *module_search_path;
-    /* Python program name */
-    wchar_t *program_name;
-    /* Set by Py_SetPythonHome() or PYTHONHOME environment variable */
-    wchar_t *home;
 } _PyPathConfig;
 
-#ifdef MS_WINDOWS
-#define _PyPathConfig_INIT \
-    {.program_full_path = NULL, \
-     .prefix = NULL, \
-     .dll_path = NULL, \
-     .module_search_path = NULL, \
-     .program_name = NULL, \
-     .home = NULL}
-#else
-#define _PyPathConfig_INIT \
-    {.program_full_path = NULL, \
-     .prefix = NULL, \
-     .exec_prefix = NULL, \
-     .module_search_path = NULL, \
-     .program_name = NULL, \
-     .home = NULL}
-#endif
-
-PyAPI_DATA(_PyPathConfig) _Py_path_config;
-
-PyAPI_FUNC(_PyInitError) _PyPathConfig_Calculate(
-    _PyPathConfig *config,
-    const _PyMainInterpreterConfig *main_config);
-PyAPI_FUNC(void) _PyPathConfig_Clear(_PyPathConfig *config);
+#define _PyPathConfig_INIT {.module_search_path = NULL}
 
 
 /* Full Python runtime state */

Include/pylifecycle.h

@@ -105,10 +105,11 @@ PyAPI_FUNC(wchar_t *) Py_GetPath(void);
 #ifdef Py_BUILD_CORE
 PyAPI_FUNC(_PyInitError) _PyPathConfig_Init(
     const _PyMainInterpreterConfig *main_config);
+PyAPI_FUNC(void) _PyPathConfig_Fini(void);
 #endif
 PyAPI_FUNC(void)      Py_SetPath(const wchar_t *);
 #ifdef MS_WINDOWS
-int _Py_CheckPython3(void);
+int _Py_CheckPython3();
 #endif
 
 /* In their own files */

Include/pystate.h

@@ -72,8 +72,7 @@ typedef struct {
     (_PyMainInterpreterConfig){\
      .install_signal_handlers = -1, \
      .module_search_path_env = NULL, \
-     .home = NULL, \
-     .program_name = NULL}
+     .home = NULL}
 
 typedef struct _is {
 

Makefile.pre.in

@@ -337,9 +337,8 @@ PYTHON_OBJS=	\
 		Python/importdl.o \
 		Python/marshal.o \
 		Python/modsupport.o \
-		Python/mysnprintf.o \
 		Python/mystrtoul.o \
-		Python/pathconfig.o \
+		Python/mysnprintf.o \
 		Python/peephole.o \
 		Python/pyarena.o \
 		Python/pyctype.o \