OMEdit segfaults in libQtGui.so.4

[Per Östlund]

OMEdit segfaults immediately for me, with gdb saying this:

Program received signal SIGSEGV, Segmentation fault.
0x00007fffec791c34 in ?? () from /usr/lib/libQtGui.so.4
(gdb) bt
#0  0x00007fffec791c34 in ?? () from /usr/lib/libQtGui.so.4
#1  0x00007ffff7dea27a in call_init.part () from /lib64/ld-linux-x86-64.so.2
#2  0x00007ffff7dea38b in _dl_init () from /lib64/ld-linux-x86-64.so.2
#3  0x00007ffff7ddbdba in _dl_start_user () from /lib64/ld-linux-x86-64.so.2
#4  0x0000000000000001 in ?? ()
#5  0x00007fffffffe0b3 in ?? ()
#6  0x0000000000000000 in ?? ()

This is on Arch Linux 64-bit, with both qt4 and qt5 installed. ldd OMEdit gives (with non-OM and non-Qt stuff removed):

libQt5WebKitWidgets.so.5 => /usr/lib/libQt5WebKitWidgets.so.5 (0x00007f5e607c9000)	libQt5WebKit.so.5 => /usr/lib/libQt5WebKit.so.5 (0x00007f5e5e129000)
libQt5Svg.so.5 => /usr/lib/libQt5Svg.so.5 (0x00007f5e5ded2000)
libQt5PrintSupport.so.5 => /usr/lib/libQt5PrintSupport.so.5 (0x00007f5e5dc5f000)
libQt5Widgets.so.5 => /usr/lib/libQt5Widgets.so.5 (0x00007f5e5d3ab000)
libQt5Gui.so.5 => /usr/lib/libQt5Gui.so.5 (0x00007f5e5cc3f000)
libQt5XmlPatterns.so.5 => /usr/lib/libQt5XmlPatterns.so.5 (0x00007f5e5c63c000)
libQt5Network.so.5 => /usr/lib/libQt5Network.so.5 (0x00007f5e5c2e4000)
libQt5Xml.so.5 => /usr/lib/libQt5Xml.so.5 (0x00007f5e5c0a7000)
libQt5Core.so.5 => /usr/lib/libQt5Core.so.5 (0x00007f5e5b9ba000)
libQtGui.so.4 => /usr/lib/libQtGui.so.4 (0x00007f5e583c8000)
libQtCore.so.4 => /usr/lib/libQtCore.so.4 (0x00007f5e57ec0000)
libQt5Sensors.so.5 => /usr/lib/libQt5Sensors.so.5 (0x00007f5e57c83000)
libQt5OpenGL.so.5 => /usr/lib/libQt5OpenGL.so.5 (0x00007f5e57a28000)
libQt5Positioning.so.5 => /usr/lib/libQt5Positioning.so.5 (0x00007f5e54182000)
libQt5Quick.so.5 => /usr/lib/libQt5Quick.so.5 (0x00007f5e53ba2000)
libQt5Qml.so.5 => /usr/lib/libQt5Qml.so.5 (0x00007f5e53565000)
libQt5WebChannel.so.5 => /usr/lib/libQt5WebChannel.so.5 (0x00007f5e53347000)
libQt5Sql.so.5 => /usr/lib/libQt5Sql.so.5 (0x00007f5e53104000)

So OMEdit is linked against both libQtGui.so.4 and libQt5Gui.so.5, i.e. a mix of Qt 4 and Qt 5 libraries. That seems bad, or is it supposed to be like that?

[Martin Sjölund]

The problem I suppose is that qmake is found, but cmake prefers qt4 (there was another ticket for this...)

[Henning Kiel]

Is this problem solved?

The corresponding ticket should be #3504 and the fix in https://trac.openmodelica.org/OpenModelica/changeset/7fd0367c6223e12217495b28ba59f193b4f3763d/OMEdit

[Per Östlund]

Replying to hkiel:

Is this problem solved?

The corresponding ticket should be #3504 and the fix in https://trac.openmodelica.org/OpenModelica/changeset/7fd0367c6223e12217495b28ba59f193b4f3763d/OMEdit

No, this has not been solved. OMEdit uses qmake instead of CMake, so the fix isn't immediately applicable. I tried some ways to force the QT version with qmake before reporting the issue, but couldn't come up with a solution that worked (don't remember what I tried though, too long ago).

[Per Östlund]

Removing set(QT4_BUILD ON) from qjson/CMakeLists.txt fixes the issue for me, but Martin isn't happy with that solution (need to be able to select which Qt version to build with).

[Adeel Asghar]

Isn't it fixed now?

[Per Östlund]

Replying to adeas31:

Isn't it fixed now?

I guess so, since it works for me now.