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Tested with 2.7.18rc1, built with Py_UNICODE_SIZE 4.
Change also tested with Python 3.8.

- look for windows python lib when using mingw & msys
  - if not found, then look for system python lib as before

* Fix undefined memoryview format

* Add missing <algorithm> header

* Add workaround for py27 array compatibility

* Workaround py27 memoryview behavior

* Fix memoryview constructor from buffer_info

* Workaround PyMemoryView_FromMemory availability in py27

* Fix up memoryview tests

* Update memoryview test from buffer to check signedness

* Use static factory method to create memoryview

* Remove ndim arg from memoryview::frombuffer and add tests

* Allow ndim=0 memoryview and documentation fixup

* Use void* to align to frombuffer method signature

* Add const variants of frombuffer and frommemory

* Add memory view section in doc

* Fix docs

* Add test for null buffer

* Workaround py27 nullptr behavior in test

* Rename frombuffer to from_buffer

- `PyArray_NewFromDescr_` should have been using `Py_intptr_t const *`
  - https://github.com/numpy/numpy/blob/18a6e3e505ee416ddfc617f3e9afdff5a031c2c2/numpy/core/src/multiarray/ctors.h#L5-L8
- `PyArray_GetArrayParamsFromObject_` should be using `NPY_BOOL`
  - https://github.com/numpy/numpy/blob/18a6e3e505ee416ddfc617f3e9afdff5a031c2c2/numpy/core/src/multiarray/ctors.c#L1350-L1355
  - https://docs.scipy.org/doc/numpy-1.13.0/reference/c-api.dtype.html#c.npy_bool
- `PyArray_DescrNewFromType` is at offset 96
  - https://github.com/numpy/numpy/blob/36e017194c32a53cf2965a513243cb3c348095df/numpy/core/code_generators/numpy_api.py#L141
- `array_t` constructor that takes a size and a pointer should take `ssize_t`.
  - Fixes #1599

This avoids a potential conflict with names in the same scope of the
same name as the embedded module, like namespaces or other global
variables.

Fixes #2172

* Change NAMESPACE_BEGIN and NAMESPACE_END macros into PYBIND11_NAMESPACE_BEGIN and PYBIND11_NAMESPACE_END

* Fix sudden HomeBrew 'python not installed' error

* Sweep difference in 'Class.__init__() must be called when overriding __init__' error message between CPython and PyPy under the rug

* Homebrew updated to 3.8 yesterday.
Co-authored-by: Henry Schreiner <HenrySchreinerIII@gmail.com>

* Error out eval_file

* Enable dynamic attribute support for Pypy >= 6

* Add a test for dynamic attribute support

* Skip test for eval_file on pypy

* Workaround for __qualname__ on PyPy3

* Add a PyPy3.6 7.3.0 build

* Only disable in PyPy3

* Fix travis testing

* No numpy and scipy for pypy

* Enable test on pypy2

* Fix logic in eval_file

* Skip a few tests due to bugs in PyPy

* scipy wheels are broken. make pypy2 a failrue
Co-authored-by: Andreas Kloeckner <inform@tiker.net>

- Fixes #2103

* Adding pybind11::cast overload for rvalue references

pybind11_add_module fails because FindPythonLibsNew.cmake try to link PythonXX.lib, but the first letter "p" should be lowercase.

The PyEval_InitThreads() and PyEval_ThreadsInitialized() functions are
now deprecated and will be removed in Python 3.11. Calling
PyEval_InitThreads() now does nothing. The GIL is initialized by
Py_Initialize() since Python 3.7.

Closes #2270

* added overload for l-value ref-qualified methods

* Added test.
Before, the code would have failed to build.

* (docs) convert note to real note

* (docs) Add information about (deep)copy

For rationale, see #2241, eeb10448;
there is a second entry point function defined by the PYBIND11_MODULE
macro that also needs to be annotated as unused.

This change defines a new, portable macro PYBIND11_MAYBE_UNUSED to
mark declarations as unused, and annotates the PYBIND11_MODULE entry
point with this attribute.

The purpose of this annotation is to facilitate dead code detection,
which might otherwise consider the module entry point function dead,
since it isn't otherwise used. (It is only used via FFI.)