Bug#846996: Unable to compile with g++-6

2016-12-05 Thread Thomas Viehweger 
Hi Dmitry,
>> Trying to compile lxqt-panel with g++-6 and qtbase5-dev_5.7.1 results in the 
>> following errors:
>>
>> /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h: In function ‘uint 
>> qCountTrailingZeroBits(quint16)’:
>> /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h:630:32: error: 
>> ‘__builtin_ctzs’ was not declared in this scope
>>  return v ? __builtin_ctzs(v) : 16U;
>> ^
>> /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h: In function ‘uint 
>> qCountLeadingZeroBits(quint16)’:
>> /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h:693:32: error: 
>> ‘__builtin_clzs’ was not declared in this scope
>>  return v ? __builtin_clzs(v) : 16U;
>> ^
>>
>> This is because g++ removed __builtin_clzs and __builtin_ctzs.
> There is a potential fix for this at https://codereview.qt-project.org/175542,
> but unfortunately it needs some more work.
>
> I have just asked the upstream author about the status, if he does not reply
> in a few days, I will write my own patch and add it to the next Debian upload.
according to Uroš Bizjak it should be sufficient to use
 return __tzcnt_u16(v);
instead of
 return v ? __tzcnt_u16(v) : 16U;

I haven't checked it...

Processed: Re: Bug#846996: Unable to compile with g++-6

2016-12-05 Thread Debian Bug Tracking System 
Processing control commands:

> tags -1 confirmed upstream
Bug #846996 [qtbase5-dev] Unable to compile with g++-6
Added tag(s) upstream and confirmed.

-- 
846996: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=846996
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems

Bug#846996: Unable to compile with g++-6

2016-12-05 Thread Dmitry Shachnev 
Control: tags -1 confirmed upstream

Hi Thomas,

On Sun, Dec 04, 2016 at 09:34:27PM +0100, Thomas Viehweger wrote:
> Trying to compile lxqt-panel with g++-6 and qtbase5-dev_5.7.1 results in the 
> following errors:
>
> /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h: In function ‘uint 
> qCountTrailingZeroBits(quint16)’:
> /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h:630:32: error: 
> ‘__builtin_ctzs’ was not declared in this scope
>  return v ? __builtin_ctzs(v) : 16U;
> ^
> /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h: In function ‘uint 
> qCountLeadingZeroBits(quint16)’:
> /usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h:693:32: error: 
> ‘__builtin_clzs’ was not declared in this scope
>  return v ? __builtin_clzs(v) : 16U;
> ^
>
> This is because g++ removed __builtin_clzs and __builtin_ctzs.

There is a potential fix for this at https://codereview.qt-project.org/175542,
but unfortunately it needs some more work.

I have just asked the upstream author about the status, if he does not reply
in a few days, I will write my own patch and add it to the next Debian upload.

--
Dmitry Shachnev


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Bug#846996: Unable to compile with g++-6

2016-12-04 Thread Thomas Viehweger 
Package: qtbase5-dev
Version: 5.7.1~20161021+dfsg-6
Severity: important

Trying to compile lxqt-panel with g++-6 and qtbase5-dev_5.7.1 results in the 
following errors:

In file included from /usr/include/x86_64-linux-gnu/qt5/QtCore/qlist.h:43:0,
 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qobject.h:49,
 from /usr/include/x86_64-linux-gnu/qt5/QtCore/qplugin.h:43,
 from /usr/include/x86_64-linux-gnu/qt5/QtCore/QtPlugin:1,
 from 
/home/src/lxqt-panel-de/plugin-clock/../panel/ilxqtpanelplugin.h:32,
 from /home/src/lxqt-panel-de/plugin-clock/lxqtclock.h:34,
 from /home/src/lxqt-panel-de/plugin-clock/lxqtclock.cpp:32:
/usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h: In function ‘uint 
qCountTrailingZeroBits(quint16)’:
/usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h:630:32: error: 
‘__builtin_ctzs’ was not declared in this scope
 return v ? __builtin_ctzs(v) : 16U;
^
/usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h: In function ‘uint 
qCountLeadingZeroBits(quint16)’:
/usr/include/x86_64-linux-gnu/qt5/QtCore/qalgorithms.h:693:32: error: 
‘__builtin_clzs’ was not declared in this scope
 return v ? __builtin_clzs(v) : 16U;
^

This is because g++ removed __builtin_clzs and __builtin_ctzs. See for example

https://www.mail-archive.com/gcc-bugs@gcc.gnu.org/msg511530.html