[Cython] Cython is not PEP-420 (Implicit Namespace Packages) compliant

[Alexey V Gorshkov]

Hi!

Reporting about Cython PEP-420 (Implicit Namespace Packages) incompliance.

(Sample package setup attached)

(http://www.python.org/dev/peps/pep-0420/)

Next package's tree will not work and will return error

.
./setup.py
./firstlevel
./firstlevel/secondlevel
./firstlevel/secondlevel/mydearpackage
./firstlevel/secondlevel/mydearpackage/__init__.py
./firstlevel/secondlevel/mydearpackage/test.pyx
./firstlevel/secondlevel/mydearpackage/test_h.pxd


===== Error Message =====
> python3 ./setup.py build_ext --inplace
running build_ext


Error compiling Cython file:
------------------------------------------------------------
...
cimport firstlevel.secondlevel.mydearpackage.test_h       ^
------------------------------------------------------------


building 'firstlevel.secondlevel.mydearpackage.test' extension
creating build
creating build/temp.linux-i686-3.3
creating build/temp.linux-i686-3.3/firstlevel
creating build/temp.linux-i686-3.3/firstlevel/secondlevel
creating build/temp.linux-i686-3.3/firstlevel/secondlevel/mydearpackage

error: command 'i486-pc-linux-gnu-gcc' failed with exit status 1
===== Error Message End =====



===== Normal Success Message =====
>python3 ./setup.py build_ext --inplace
running build_ext

building 'firstlevel.secondlevel.mydearpackage.test' extension

===== Normal Success Message End =====

cythoning firstlevel/secondlevel/mydearpackage/test.pyx to firstlevel/secondlevel/mydearpackage/test.c firstlevel/secondlevel/mydearpackage/test.pyx:1:8: 'firstlevel.secondlevel.mydearpackage.test_h.pxd' not found i486-pc-linux-gnu-gcc -pthread -Wno-unused-result -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3m -c firstlevel/secondlevel/mydearpackage/test.c -o build/temp.linux-i686-3.3/firstlevel/secondlevel/mydearpackage/test.o firstlevel/secondlevel/mydearpackage/test.c:1:2: error: #error Do not use this file, it is the result of a failed Cython compilation. Simply adding __init__.py to firstlevel and firstlevel/secondlevel, and there will no building error cythoning firstlevel/secondlevel/mydearpackage/test.pyx to firstlevel/secondlevel/mydearpackage/test.c i486-pc-linux-gnu-gcc -pthread -Wno-unused-result -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -I/usr/include/python3.3m -c firstlevel/secondlevel/mydearpackage/test.c -o build/temp.linux-i686-3.3/firstlevel/secondlevel/mydearpackage/test.o i486-pc-linux-gnu-gcc -pthread -shared build/temp.linux-i686-3.3/firstlevel/secondlevel/mydearpackage/test.o -L/usr/lib -lpython3.3m -o /mnt/sda3/home/agu/p/pep420test/firstlevel/secondlevel/mydearpackage/test.cpython-33m.so

pep420test-0.0.0.tar.gz
Description: application/gzip

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