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...