bpo-31650: Remove _Py_CheckHashBasedPycsMode global config var (GH-8608)

bpo-31650, bpo-34170: Replace _Py_CheckHashBasedPycsMode with
_PyCoreConfig._check_hash_pycs_mode. Modify PyInit__imp() and
zipimport to get the parameter from the current interpreter core
configuration.

Remove Include/internal/import.h file.

2 files changed, 2 insertions, 12 deletions

diff --git a/Python/coreconfig.c b/Python/coreconfig.c
index 7dabe5f..829592c 100644
--- a/Python/coreconfig.c
+++ b/Python/coreconfig.c
@@ -1,5 +1,4 @@
 #include "Python.h"
-#include "internal/import.h"
 #include "internal/pystate.h"
 
 
@@ -52,7 +51,6 @@ int Py_IsolatedFlag = 0; /* for -I, isolate from user's env */
 int Py_LegacyWindowsFSEncodingFlag = 0; /* Uses mbcs instead of utf-8 */
 int Py_LegacyWindowsStdioFlag = 0; /* Uses FileIO instead of WindowsConsoleIO */
 #endif
-const char *_Py_CheckHashBasedPycsMode = "default";
 
 
 void
@@ -317,10 +315,6 @@ _PyCoreConfig_GetGlobalConfig(_PyCoreConfig *config)
     COPY_NOT_FLAG(write_bytecode, Py_DontWriteBytecodeFlag);
     COPY_NOT_FLAG(user_site_directory, Py_NoUserSiteDirectory);
 
-    if (config->_check_hash_pycs_mode == NULL) {
-        config->_check_hash_pycs_mode = _Py_CheckHashBasedPycsMode;
-    }
-
 #undef COPY_FLAG
 #undef COPY_NOT_FLAG
 }
@@ -359,10 +353,6 @@ _PyCoreConfig_SetGlobalConfig(const _PyCoreConfig *config)
     COPY_NOT_FLAG(write_bytecode, Py_DontWriteBytecodeFlag);
     COPY_NOT_FLAG(user_site_directory, Py_NoUserSiteDirectory);
 
-    if (config->_check_hash_pycs_mode != NULL) {
-        _Py_CheckHashBasedPycsMode = config->_check_hash_pycs_mode;
-    }
-
     /* Random or non-zero hash seed */
     Py_HashRandomizationFlag = (config->use_hash_seed == 0 ||
                                 config->hash_seed != 0);
diff --git a/Python/import.c b/Python/import.c
index de132a3..71d5ea1 100644
--- a/Python/import.c
+++ b/Python/import.c
@@ -5,7 +5,6 @@
 #include "Python-ast.h"
 #undef Yield /* undefine macro conflicting with winbase.h */
 #include "internal/hash.h"
-#include "internal/import.h"
 #include "internal/pystate.h"
 #include "errcode.h"
 #include "marshal.h"
@@ -2290,7 +2289,8 @@ PyInit__imp(void)
     d = PyModule_GetDict(m);
     if (d == NULL)
         goto failure;
-    PyObject *pyc_mode = PyUnicode_FromString(_Py_CheckHashBasedPycsMode);
+    _PyCoreConfig *config = &PyThreadState_GET()->interp->core_config;
+    PyObject *pyc_mode = PyUnicode_FromString(config->_check_hash_pycs_mode);
     if (pyc_mode == NULL) {
         goto failure;
     }