id	summary	reporter	owner	description	type	status	priority	milestone	component	resolution	keywords	cc	branch	branch_author	launchpad_bug
5158	Installing on Pypy fails because of CPython-specific extension modules	lvh	lvh	"Some of the extension modules (specifically the Cython extensions) are CPython specific and break on Pypy. This makes `pip install -e some_twisted_checkout` not work. Eventually it blows up with an error like:

{{{/home/lvh/tmp/pypy/include/pypy_decl.h:129:29: note: expected ‘struct PyThreadState *’ but argument is of type ‘int’}}}

There is a complete pip log attached to this ticket.

Armin Rigo has assured me this is a consequence of Cython. Cython support in Pypy is a work in progress. There are a number of potential eventual resolutions for this, but the correct thing to do right now is to disable compilation of the module on not-CPython. The right thing to do *eventually* might be re-enable it, or [ticket:3114 just use `select.epoll` as available on recent Pythons].

The affected modules are `twisted.test.raiser`, `twisted.internet.iocpreactor.iocpsupport.iocpsupport and `twisted.python.epoll`."	defect	closed	normal		core	fixed	pypy		branches/pypy-5158	lvh