qiskit/pyproject.toml

[build-system]
requires = ["Cython>=0.27.1", "setuptools", "wheel"]
Add pyproject.toml to declare cython build requirement (#2278) Right now when you try to build terra >=0.8.0 and you don't have Cython installed it will fail. This is because we rely on cython being present to build the stochastic swap code. While we have a setuptools setup_requires defining this dependency it doesn't work because the dependency on cython is needed before setuptools can resolve that for us. PEP518 provides a solution for this problem by adding the concept of a pyproject.toml file which can be used to outline build requirements which are build time depdencies needed before the setup.py is run. With this file present when you run: pip install git+https://github.com/Qiskit/qiskit-terra (or running on a local checkout) and cython isn't installed pip will acquire it and use it for building the sdist. 2019-05-14 10:13:38 +08:00			`[build-system]`
			`requires = ["Cython>=0.27.1", "setuptools", "wheel"]`