Include/internal/import.h

#ifndef Py_INTERNAL_IMPORT_H
#define Py_INTERNAL_IMPORT_H

extern const char *_Py_CheckHashBasedPycsMode;

#endif
closes bpo-31650: PEP 552 (Deterministic pycs) implementation (#4575) Python now supports checking bytecode cache up-to-dateness with a hash of the source contents rather than volatile source metadata. See the PEP for details. While a fairly straightforward idea, quite a lot of code had to be modified due to the pervasiveness of pyc implementation details in the codebase. Changes in this commit include: - The core changes to importlib to understand how to read, validate, and regenerate hash-based pycs. - Support for generating hash-based pycs in py_compile and compileall. - Modifications to our siphash implementation to support passing a custom key. We then expose it to importlib through _imp. - Updates to all places in the interpreter, standard library, and tests that manually generate or parse pyc files to grok the new format. - Support in the interpreter command line code for long options like --check-hash-based-pycs. - Tests and documentation for all of the above. 2017-12-09 10:26:52 -08:00			`#ifndef Py_INTERNAL_IMPORT_H`
			`#define Py_INTERNAL_IMPORT_H`

			`extern const char *_Py_CheckHashBasedPycsMode;`

			`#endif`