[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Donald Stufft]

Changes by Donald Stufft :


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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Zachary Ware]

Zachary Ware added the comment:

Thanks for the patch again :).

The last idea you mentioned sounds somewhat interesting, please open a new 
issue for it if you'd like to pursue it.

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Roundup Robot]

Roundup Robot added the comment:

New changeset c4eb211fb38b by Zachary Ware in branch 'default':
Closes #21124, #28337: Call PyType_Ready on unpackiter_type.
https://hg.python.org/cpython/rev/c4eb211fb38b

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resolution:  -> fixed
stage:  -> resolved
status: open -> closed

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Masayuki Yamamoto]

Masayuki Yamamoto added the comment:

unpack_iterator type has not been registered into _struct module. And all users 
get only unpack_iterator object from function returning iterator. The object 
iterating doesn't need reference to type. Therefore, I think issue finish by 
PyType_Ready fix because this segfault doesn't have big impact.

However, I think if possible, it is preferable that extension module having 
un-initialize type objects gets a compile error at build time. And impossible 
case for compile error is better that wrong extension module always fails 
import.

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Zachary Ware]

Zachary Ware added the comment:

Do we not have a unit test for that?

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Masayuki Yamamoto]

Masayuki Yamamoto added the comment:

I wrote a patch to add the unpackiter_type initialization into PyInit__struct 
function. I has confirmed solve #28337 on ubuntu x86 16.04.

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Added file: http://bugs.python.org/file44929/PyType_Ready-unpackiter_type.patch

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

PyType_Ready() should be called for unpackiter_type.

See also issue26906.

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resolution: fixed -> 
stage: resolved -> 
status: closed -> open

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Zachary Ware]

Zachary Ware added the comment:

For future reference, having a patch attached to the issue does not mean the 
issue is fixed, and it should not be closed.

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nosy: +zach.ware
stage:  -> resolved
type:  -> compile error
versions: +Python 3.7 -Python 3.4

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Roundup Robot]

Roundup Robot added the comment:

New changeset 3bde312ae936 by Zachary Ware in branch 'default':
Issue #21124: Fix building _struct on Cygwin.
https://hg.python.org/cpython/rev/3bde312ae936

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[dellair jie]

dellair jie added the comment:

Fixed with the patch.

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resolution:  - fixed
status: open - closed

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[dellair jie]

dellair jie added the comment:

Hello masamoto,

The patch you provided works quite well.
The build passed and Python calls are successfully.
Please let me know what else you need me to test in order to have the patch 
accepted or else feel free to close it with Resolution Fixed.

Thanks,
Dellair

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Masayuki Yamamoto]

Masayuki Yamamoto added the comment:

I have solved about compiling _struct module too.
I have no authority of this issues, So please close of issues.

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Masayuki Yamamoto]

Changes by Masayuki Yamamoto light2happy@gmail.com:


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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Ned Deily]

Changes by Ned Deily n...@acm.org:


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nosy:  -ned.deily
resolution: duplicate - 
stage: committed/rejected - 
superseder: Add Mingw recognition to pyport.h to allow building extensions - 

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[dellair jie]

dellair jie added the comment:

Neil,

It doesn't look like a duplicate of Issue6672.
The one in Issue6672 was for Mingw, all the patches simply added __MINGW32__ to 
__CYGWIN__ build structure.
While my issue is, the build failed with _struct.c on Cygwin. So the module is 
recognized, just didn't pass the compilation.

Br,
Dellair

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status: pending - open

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Masayuki Yamamoto]

Masayuki Yamamoto added the comment:

I wrote a patch file.
In other extention module source codes, global variable PyTypeObject has 
initialized to using PyVarObject_HEAD_INIT(NULL, 0).
And so, as with other modules, I tried to edit and compiling _struct.c in 
Cygwin 1.7.28.
The module compiling was passing, And struct module passed a test python3.4 -m 
test test_struct.

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keywords: +patch
nosy: +masamoto
Added file: http://bugs.python.org/file34701/3.4-struct.patch

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[dellair jie]

dellair jie added the comment:

Yamamoto,

Thanks, the patch you offered did make the _struct error disappeared. I will do 
a bit more testing.

Dellair

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[issue21124] _struct module compilation error under Cygwin 1.7.17 on Python 3.4

[Ned Deily]

Ned Deily added the comment:

This looks like a duplicate of Issue6672.

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components: +Build
nosy: +ned.deily
resolution:  - duplicate
stage:  - committed/rejected
status: open - pending
superseder:  - Add Mingw recognition to pyport.h to allow building extensions
title: Compilation error on _struct module on Python 3.4 - _struct module 
compilation error under Cygwin 1.7.17 on Python 3.4

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