Hi Jan, Thanks for your reply. I tried several paths for QT5_INSTALL_PATH, no luck so far. After I press configure, I don't see anything that mentions the Qt4 libraries, just entries like Qt5Svg_DIR which are set to e.g. /usr/lib64/cmake/Qt5Svg (/usr/lib64 is a symlink to /lib which in turn is a symlink to /usr/lib). However, for some reason a couple of Qt4 libraries are still being used — ldd ./OpenFlipper | grep -i "Qt" libQt5Declarative.so.5 => /usr/lib/libQt5Declarative.so.5 (0x00007f5f849f9000) libQt5OpenGL.so.5 => /usr/lib/libQt5OpenGL.so.5 (0x00007f5f847a1000) libQt5Script.so.5 => /usr/lib/libQt5Script.so.5 (0x00007f5f84310000) libQt5ScriptTools.so.5 => /usr/lib/libQt5ScriptTools.so.5 (0x00007f5f8403d000) libQt5Sql.so.5 => /usr/lib/libQt5Sql.so.5 (0x00007f5f83df6000) libQt5Xml.so.5 => /usr/lib/libQt5Xml.so.5 (0x00007f5f83bbb000) libQt5XmlPatterns.so.5 => /usr/lib/libQt5XmlPatterns.so.5 (0x00007f5f835d1000) libQt5Help.so.5 => /usr/lib/libQt5Help.so.5 (0x00007f5f83335000) libQt5WebKit.so.5 => /usr/lib/libQt5WebKit.so.5 (0x00007f5f80ca2000) libQt5Network.so.5 => /usr/lib/libQt5Network.so.5 (0x00007f5f80936000) libQt5PrintSupport.so.5 => /usr/lib/libQt5PrintSupport.so.5 (0x00007f5f806c5000) libQt5Widgets.so.5 => /usr/lib/libQt5Widgets.so.5 (0x00007f5f7fe4b000) libQt5X11Extras.so.5 => /usr/lib/libQt5X11Extras.so.5 (0x00007f5f7fc47000) libQt5Gui.so.5 => /usr/lib/libQt5Gui.so.5 (0x00007f5f7f4c4000) libQt5Core.so.5 => /usr/lib/libQt5Core.so.5 (0x00007f5f7edfa000) libQtSvg.so.4 => /usr/lib/libQtSvg.so.4 (0x00007f5f7c167000) libQtGui.so.4 => /usr/lib/libQtGui.so.4 (0x00007f5f7b42e000) libQtCore.so.4 => /usr/lib/libQtCore.so.4 (0x00007f5f7af26000) libQt5CLucene.so.5 => /usr/lib/libQt5CLucene.so.5 (0x00007f5f7ac2c000) libQt5Sensors.so.5 => /usr/lib/libQt5Sensors.so.5 (0x00007f5f775eb000) libQt5Positioning.so.5 => /usr/lib/libQt5Positioning.so.5 (0x00007f5f773ab000) libQt5Quick.so.5 => /usr/lib/libQt5Quick.so.5 (0x00007f5f76dc3000) libQt5Qml.so.5 => /usr/lib/libQt5Qml.so.5 (0x00007f5f767d2000) libQt5WebChannel.so.5 => /usr/lib/libQt5WebChannel.so.5 (0x00007f5f765b5000) Note that /usr/lib also contains the Qt5 versions of those libraries (libQt5Svg, libQt5Gui and libQt5Core). Any ideas? I'm probably overlooking something — I don't have a lot of experience manually changing cmake settings. Best, Pieter On 2 May 2016 at 14:01, Jan Möbius <moebius@cs.rwth-aachen.de> wrote:
Hi,
your backtrace states that you are linking against Qt 4 or a mixture of 4/5. Please do the following steps:
Open cmake Set QT5_INSTALL_PATH to your Qt installation dir( e.g. .../Qt-5.5.1/5.5/gcc_64 ) Select all other Qt related entries in cmake and remove them. configure generate.
You should not see any other qt4 related entries after this. Then rebuild.