[issue28117] warning: dereferencing type-punned pointer will break strict-aliasing rules

2018-09-26 Thread ekul 


ekul  added the comment:

I just got this set of warnings while building 3.6.6 on RasPi Debian9/ARM. Good 
to know the warning is spurious. 

Just finding my way here - is Serhiy's patch above a working 2016 fix for this 
that got stuck in review? I couldn't find a PR for it. If the warning _is_ 
spurious it would be great to patch it.

--
nosy: +ekul

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[issue28117] warning: dereferencing type-punned pointer will break strict-aliasing rules

2017-11-09 Thread Masayuki Yamamoto 

Masayuki Yamamoto  added the comment:

Serhiy, would you open a PR? Your patch looks good to me.
I've been looking at the warning on my machine (ubuntu 16.04 x86), it's a bit 
annoying to me.

--
nosy: +masamoto

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[issue28117] warning: dereferencing type-punned pointer will break strict-aliasing rules

2016-09-27 Thread Serhiy Storchaka 

Serhiy Storchaka added the comment:

Proposed patch eliminates warnings.

--
keywords: +patch
stage: needs patch -> patch review
Added file: http://bugs.python.org/file44847/keccak_warnings.patch

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[issue28117] warning: dereferencing type-punned pointer will break strict-aliasing rules

2016-09-13 Thread Christian Heimes 

Christian Heimes added the comment:

The compile warning occurs on 32bit builds only: 
http://buildbot.python.org/all/builders/x86%20Gentoo%20Non-Debug%20with%20X%203.x

--

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[issue28117] warning: dereferencing type-punned pointer will break strict-aliasing rules

2016-09-13 Thread Christian Heimes 

Changes by Christian Heimes :


--
dependencies: +Add SHA-3 and SHAKE (Keccak) support
stage:  -> needs patch

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[issue28117] warning: dereferencing type-punned pointer will break strict-aliasing rules

2016-09-13 Thread Serhiy Storchaka 

New submission from Serhiy Storchaka:

In file included from /home/serhiy/py/cpython/Modules/_sha3/sha3module.c:113:0:
/home/serhiy/py/cpython/Modules/_sha3/kcp/KeccakP-1600-inplace32BI.c: In 
function ‘_PySHA3_KeccakP1600_SetBytesInLaneToZero’:
/home/serhiy/py/cpython/Modules/_sha3/kcp/KeccakP-1600-inplace32BI.c:97:5: 
warning: dereferencing type-punned pointer will break strict-aliasing rules 
[-Wstrict-aliasing]
 low = *((UINT32*)(laneAsBytes+0));
 ^
In file included from /home/serhiy/py/cpython/Modules/_sha3/sha3module.c:113:0:
/home/serhiy/py/cpython/Modules/_sha3/kcp/KeccakP-1600-inplace32BI.c: In 
function ‘_PySHA3_KeccakP1600_AddBytesInLane’:
/home/serhiy/py/cpython/Modules/_sha3/kcp/KeccakP-1600-inplace32BI.c:152:5: 
warning: dereferencing type-punned pointer will break strict-aliasing rules 
[-Wstrict-aliasing]
 low = *((UINT32*)(laneAsBytes+0));
 ^
/home/serhiy/py/cpython/Modules/_sha3/kcp/KeccakP-1600-inplace32BI.c: In 
function ‘_PySHA3_KeccakP1600_ExtractBytesInLane’:
/home/serhiy/py/cpython/Modules/_sha3/kcp/KeccakP-1600-inplace32BI.c:296:5: 
warning: dereferencing type-punned pointer will break strict-aliasing rules 
[-Wstrict-aliasing]
 *((UINT32*)(laneAsBytes+0)) = low;
 ^
/home/serhiy/py/cpython/Modules/_sha3/kcp/KeccakP-1600-inplace32BI.c: In 
function ‘_PySHA3_KeccakP1600_ExtractAndAddBytesInLane’:
/home/serhiy/py/cpython/Modules/_sha3/kcp/KeccakP-1600-inplace32BI.c:369:5: 
warning: dereferencing type-punned pointer will break strict-aliasing rules 
[-Wstrict-aliasing]
 *((UINT32*)(laneAsBytes+0)) = low;
 ^

--
components: Extension Modules
messages: 276193
nosy: christian.heimes, mark.dickinson, serhiy.storchaka
priority: normal
severity: normal
status: open
title: warning: dereferencing type-punned pointer will break strict-aliasing 
rules
type: compile error
versions: Python 3.6, Python 3.7

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