Make sure the module init function is declared as 'extern "C"' in C++ also when the CYTHON_NO_PYINIT_EXPORT option is used.
Closes #3414.

Closes #3038.

Closes #3038.

https://github.com/numpy/numpy/pull/16170/commits/e00d94b70880b1321eff727ac7eb897be7422340

Avoid MSVC warning in refnanny about an integer assignment that reduces the value range (although it's probably safe to assume that C code line numbers > 2^30 will remain rare for another while).

Avoid an additional utility code section for 2-exception matching by relying on existing special-cased macros.

For Py3.5+, where inittab should really be used instead. For GCC, Clang, MSVC and C++14

Add a dedicated subtype check function for testing against two possible base classes in Py3 (currently used for generator exception checks).

Simplify and clean up the embedded main import code to make it work how it's officially supposed to work: use the inittab.

Avoid generating an "abort()" check for known non-0 steps in prange(). Instead, make it a compile time error if we know it's zero.

Fix optimisation of aligned '%' formats ('%05s', '%-5s') into the correct f-string alignment format.
Closes https://github.com/cython/cython/issues/3476

Floats do not support '{x:d}' formatting and need conversion to 'int' first.
Closes https://github.com/cython/cython/issues/3092

Floats do not support '{x:d}' formatting and need conversion to 'int' first.
Closes https://github.com/cython/cython/issues/3092

Reimplement __Pyx_PyDict_GetItemStrWithError() as a hacky version in Py2 to get the semantics right of returning a borrowed reference with non-KeyError exceptions left in place.

Closes https://github.com/cython/cython/issues/3578

Add comment to explain why "better" GIL handling is not needed in special methods (because it's held anyway).

Closes https://github.com/cython/cython/issues/3590

Test modf, since it's in C89 and has a non-trivial signature.

cimport some C99 float and long double functions, and test legacy kwargs
for double functions.

Adds many long double variants (e.g. expl) that were previously omitted.
No functions have been removed.

I've omitted the identifier for trivial parameters in new functions.
However, I've retained them for existing functions for compatibility
with legacy kwargs.

Classes of functions/macros that are still missing:
 - error-handling ones, like math_errhandling and MATH_ERRNO
 - Bessel functions like j0, y0

Fixes cython/cython#3570