On 26 November 2016 at 20:02, Thiago Macieira <thiago.macie...@intel.com> wrote: > On sábado, 26 de novembro de 2016 15:22:43 PST Ch'Gans wrote: >> Why is QVariant behaviour changing depending on the compiler version? > > You did not test multiple compiler versions. Never once in your email did you > mention a single GCC version number, let alone two. So how can you claim that > it's the compiler version?
My bad, you are right, all my kits use the system GCC, which is my case is "gcc (Ubuntu 6.2.0-5ubuntu12) 6.2.0 20161005". Got confused with installation on Windows, where the qt-online-installer install several version of gcc when using mingw, Qt-5.5 and 5.6 use MinGW-32 4.9, Qt 5.7 uses MinGW-32 5.3. So my code is build using the same gcc, but behave differently depending on the qt libraries (qt-5.6-official gives different result than qt-6.6-ubuntu). And more disturbing, linking against qt-5.5-official gives different behaviour than when linking against qt-5.6-official... And it seems all qt-official 5.5, 5.6 and 5.7, have been built with the same gcc version: $ strings /opt/Qt/5.5/gcc_64/lib/libQt5Core.so | grep -i gcc libgcc_s.so.1 GCC_3.0 GCC_3.4 Qt 5.5.1 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 4.9.1 20140922 (Red Hat 4.9.1-10)) This is the QtCore library version Qt 5.5.1 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 4.9.1 20140922 (Red Hat 4.9.1-10)) qt_prfxpath=/opt/Qt/5.5/gcc_64 GCC: (GNU) 4.4.7 20120313 (Red Hat 4.4.7-9) GCC: (GNU) 4.9.1 20140922 (Red Hat 4.9.1-10) .gcc_except_table $ strings /opt/Qt/5.6/gcc_64/lib/libQt5Core.so | grep -i gcc libgcc_s.so.1 GCC_3.0 GCC_3.4 Qt 5.6.2 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 4.9.1 20140922 (Red Hat 4.9.1-10)) This is the QtCore library version Qt 5.6.2 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 4.9.1 20140922 (Red Hat 4.9.1-10)) qt_prfxpath=/opt/Qt/5.6/gcc_64 GCC: (GNU) 4.4.7 20120313 (Red Hat 4.4.7-9) GCC: (GNU) 4.9.1 20140922 (Red Hat 4.9.1-10) .gcc_except_table $ strings /opt/Qt/5.7/gcc_64/lib/libQt5Core.so | grep -i gcc libgcc_s.so.1 GCC_3.0 GCC_3.4 Qt 5.7.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 4.9.1 20140922 (Red Hat 4.9.1-10)) This is the QtCore library version Qt 5.7.0 (x86_64-little_endian-lp64 shared (dynamic) release build; by GCC 4.9.1 20140922 (Red Hat 4.9.1-10)) qt_prfxpath=/opt/Qt/5.7/gcc_64 GCC: (GNU) 4.4.7 20120313 (Red Hat 4.4.7-9) GCC: (GNU) 4.9.1 20140922 (Red Hat 4.9.1-10) .gcc_except_table For my project: $ strings ../build-le-ipc2581b-viewer-Desktop_Qt_5_7_0_GCC_64bit-Release/le-ipc2581b-viewer | grep -i gcc libgcc_s.so.1 /opt/Qt/5.7/gcc_64/lib GCC_3.0 GCC: (Ubuntu 6.2.0-5ubuntu12) 6.2.0 20161005 _Unwind_Resume@@GCC_3.0 .gcc_except_table Chris > > -- > Thiago Macieira - thiago.macieira (AT) intel.com > Software Architect - Intel Open Source Technology Center > > _______________________________________________ > Interest mailing list > Interest@qt-project.org > http://lists.qt-project.org/mailman/listinfo/interest _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
