Scripts for building binary wheels

These scripts are meant to simplify life of a developer who wants to distribute a cross-platform Python package with dynamic libraries through PyPI binary wheel system.

The scripts assume use of CFFI and don't work for Cython extensions, as this would be much more complicated.

Assumptions

• The dynamic library to be used is built as one of the targets specified in CMakelists.txt inside a submodule
• CFFI is used in ABI mode, that is, the dynamic library doesn't have any references to Python whatsoever
• The Python code is compatible with both 2 and 3 versions

Linux

• The submodule directory must contain a Dockerfile based on CentOS 6, so that manylinux1 wheels can be built
• The script will use the default G++ compiler; tweak $PATH in the Dockerfile to use a custom one

OS X

• brew install python3 gcc cmake
• If GCC version is > 7, edit CC and CXX in build_osx_wheel.sh accordingly
• pip3 install cffi delocate

Windows

• Miniconda-32bit and Miniconda-64bit must be both installed into Windows home directory
• Build happens in msys2 environment, run pacman -S git make mingw-w64-{i686,x86_64}-{cmake,toolchain} to install necessary dependencies

Usage

Under the above assumptions it's relatively easy to build binary wheels for all platforms and Python versions.

Each script takes two arguments:

• submodule directory name;
• name of the cmake target

For linux and OS X only 64-bit versions are produced, for Windows both 32-bit and 64-bit.