Public bug reported:
I noticed (and I think this is the case with many, many more versions of
Qt) that when compiling with -Wconversion, the headers give lots and
lots of warnings. For example, when compiling a program containing only
"#include <QChar>" using <g++ -I/usr/include/qt4/QtCore
-I/usr/include/qt4 -c test.cpp> no warnings appear, but when adding
-Wconversion, this is the output:
In file included from /usr/include/qt4/QtCore/qchar.h:45,
from /usr/include/qt4/QtCore/QChar:1,
from test.cpp:1:
/usr/include/qt4/QtCore/qglobal.h: In function ‘qint64 qRound64(qreal)’:
/usr/include/qt4/QtCore/qglobal.h:1027: warning: conversion to ‘qreal’ from
‘qint64’ may alter its value
In file included from /usr/include/qt4/QtCore/QChar:1,
from test.cpp:1:
/usr/include/qt4/QtCore/qchar.h: In static member function ‘static ushort
QChar::highSurrogate(uint)’:
/usr/include/qt4/QtCore/qchar.h:295: warning: conversion to ‘ushort’ from
‘unsigned int’ mayalter its value
/usr/include/qt4/QtCore/qchar.h: In static member function ‘static ushort
QChar::lowSurrogate(uint)’:
/usr/include/qt4/QtCore/qchar.h:298: warning: conversion to ‘ushort’ from
‘unsigned int’ mayalter its value
/usr/include/qt4/QtCore/qchar.h: In constructor ‘QChar::QChar(uchar, uchar)’:
/usr/include/qt4/QtCore/qchar.h:369: warning: conversion to ‘ushort’ from ‘int’
may alter its value
/usr/include/qt4/QtCore/qchar.h: In member function ‘void
QChar::setCell(uchar)’:
/usr/include/qt4/QtCore/qchar.h:377: warning: conversion to ‘ushort’ from ‘int’
may alter its value
/usr/include/qt4/QtCore/qchar.h: In member function ‘void QChar::setRow(uchar)’:
/usr/include/qt4/QtCore/qchar.h:379: warning: conversion to ‘ushort’ from ‘int’
may alter its value
These are unmodified headers. Should I just not compile with
-Wconversion, i.e. is this a wontfix bug? I understand that *really*
fixing it makes the headers a lot more ugly and complicated, yet it's an
ugly bug.
** Affects: qt4-x11 (Ubuntu)
Importance: Undecided
Status: New
--
Compiling with -Wconversion gives lots and lots of warning messages in the Qt
headers
https://bugs.launchpad.net/bugs/341411
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