Em sáb 22 mar 2014, às 12:39:40, Kurt Pattyn escreveu: > Hi, > > when compiling an application, I get a lot of these warnings: > > Qt5.3.0/5.3/clang_64/lib/QtGui.framework/Headers/qquaternion.h:145:12: > warning: 'qIsNull' was marked unused but was used > [-Wused-but-marked-unused] > return qIsNull(xp) && qIsNull(yp) && qIsNull(zp) && qIsNull(wp); > > Qt5.3.0/5.3/clang_64/lib/QtGui.framework/Headers/qquaternion.h:268:12: > warning: 'qFuzzyCompare' was marked unused but was used > [-Wused-but-marked-unused] > return qFuzzyCompare(q1.xp, q2.xp) && > > Does anybody has an idea what this means?
It means the meaning of __attribute__((unused)) changed. The documentation I have for GCC 4.8 says: This attribute, attached to a function, means that the function is meant to be possibly unused. GCC does not produce a warning for this function. Note the "possibly" part in "possibly unused". It means the function may still be used, but in most cases it won't be. We added the Q_DECL_UNUSED to the static inline functions of qglobal.h so the compiler wouldn't complain that we declared them static and did not use. I don't see a point in implementing Clang's behaviour. If we know a static function is never used, we can remove it. The usefulness of the attribute is when we can't be certain, such as depending on ifdefs or functions declared in headers. Please file a bug report against Clang. -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel Open Source Technology Center _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development