See https://github.com/cython/cython/pull/3562

See #1407.

These are mutable and therefore affect the stdlib build_ext options.

Fixes #2209

See #1407.

This reverts commit 4900109c.
This is trying to parallelise the appveyor build again after allowing the setup.py script to be imported on a multiprocessing "spawn".

Make the setup.py script importable to enable multiprocessing builds that need to "spawn" processes (usually on Windows).

Fix duplicate code generation in assert condition, found for lambda functions that are used as conditions in "test_grammar.py".

These are mutable and therefore affect the stdlib build_ext options.

Fixes #2209

This was previously broken by the introduction of the "__PYX_ERR()" macro.

This allows taking advantage of the automatic "with gil" block handling for raising exceptions, allows proper control flow analysis, etc.

Always call the refnanny on function exit if we set it up on entry, not just in GIL-owning functions.
This was previously using inconsistent conditions on entry and exit of the function.

Fix expected test warnings after fixing the pipeline that extracts entries from generated Cython utility code.
Previously, it was emitting warnings twice because it was running the analysis twice.

This was previously broken by the introduction of the "__PYX_ERR()" macro.