[Python] Cython compilation error on cython==0.27.3

[asfimport]

On the latest master, I'm getting the following error:

[ 11%] Compiling Cython CXX source for lib...



Error compiling Cython file:

------------------------------------------------------------

...



    out.init(type)

    return out





cdef object pyarrow_wrap_metadata(

    ^

------------------------------------------------------------



pyarrow/public-api.pxi:95:5: Function signature does not match previous declaration

CMakeFiles/lib_pyx.dir/build.make:57: recipe for target 'CMakeFiles/lib_pyx' failed

With 0.29.0 it is working. This might have been introduced in 1220184 but I'm not sure.

Reporter: Philipp Moritz / @pcmoritz
Assignee: Uwe Korn / @xhochy

PRs and other links:

• GitHub Pull Request #3590

_{Note: This issue was originally created as ARROW-4024. Please see the migration documentation for further details.}

[asfimport]

Uwe Korn / @xhochy:
@pcmoritz Is there anything that keeps you on this Cython version? As Cython is a build-time but not a runtime dependency, I would close this bug as won't fix (maybe first ensure that we pin correctly).

[asfimport]

Philipp Moritz / @pcmoritz:
I think it's fine to drop support for 0.27. I just wanted to point it out because from

arrow/python/setup.py

Line 45 in 9da4584

if Cython.__version__ < '0.27':

arrow/python/setup.py

Line 578 in 9da4584

setup_requires=['setuptools_scm', 'cython >= 0.27'] + setup_requires,

it looks like 0.27 is supported.

[asfimport]

Wes McKinney / @wesm:
Let's bump the minimum Cython version

[asfimport]

Wes McKinney / @wesm:
Issue resolved by pull request 3590
#3590