Problems with symbol lookup errors on OpenSuse Leap 42.1

[A Former User]

Hello,

I'm working on a small application with Qt for the UI and it worked fairly well so far. I haven't been using my Linux OS lately for other reasons and came back today to found out that my application that used to work previously isn't working anymore. Initially I thought only my own application is affected, but it seems to be a more general problem and some standard Qt software is affected as well (e.g. Qt Creator, Assistant, ...) giving me the following error message (here for the Qt Assistant):

assistant: symbol lookup error: /usr/lib64/libQtOpenGL.so.4: undefined symbol: _ZN14QWidgetPrivate15checkWindowRoleEv

Before that, I have made a whole lot of automated updates to my Linux installation after booting. Here's the output of an ldd on assist, looks fairly normal to me:

ldd /usr/bin/assistant
        linux-vdso.so.1 (0x00007fffa648e000)
        libQtHelp.so.4 => /usr/lib64/libQtHelp.so.4 (0x00007f49ee45a000)
        libQtWebKit.so.4 => /usr/lib64/libQtWebKit.so.4 (0x00007f49ec105000)
        libQtSql.so.4 => /usr/lib64/libQtSql.so.4 (0x00007f49ebec4000)
        libQtGui.so.4 => /usr/lib64/libQtGui.so.4 (0x00007f49eb1df000)
        libQtNetwork.so.4 => /usr/lib64/libQtNetwork.so.4 (0x00007f49eaec7000)
        libQtCore.so.4 => /usr/lib64/libQtCore.so.4 (0x00007f49ea9d1000)
        libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x00007f49ea6c8000)
        libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f49ea4b0000)
        libc.so.6 => /lib64/libc.so.6 (0x00007f49ea108000)
        libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f49e9eea000)
        libQtCLucene.so.4 => /usr/lib64/libQtCLucene.so.4 (0x00007f49e9bcf000)
        libm.so.6 => /lib64/libm.so.6 (0x00007f49e98ce000)
        libXrender.so.1 => /usr/lib64/libXrender.so.1 (0x00007f49e96c3000)
        libjpeg.so.8 => /usr/lib64/libjpeg.so.8 (0x00007f49e946e000)
        libpng16.so.16 => /usr/lib64/libpng16.so.16 (0x00007f49e9231000)
        libwebp.so.5 => /usr/lib64/libwebp.so.5 (0x00007f49e8fd1000)
        libxslt.so.1 => /usr/lib64/libxslt.so.1 (0x00007f49e8d92000)
        libz.so.1 => /lib64/libz.so.1 (0x00007f49e8b7c000)
        libxml2.so.2 => /usr/lib64/libxml2.so.2 (0x00007f49e8810000)
        libgstapp-1.0.so.0 => /usr/lib64/libgstapp-1.0.so.0 (0x00007f49e8603000)
        libgstpbutils-1.0.so.0 => /usr/lib64/libgstpbutils-1.0.so.0 (0x00007f49e83db000)
        libgstvideo-1.0.so.0 => /usr/lib64/libgstvideo-1.0.so.0 (0x00007f49e8190000)
        libgstaudio-1.0.so.0 => /usr/lib64/libgstaudio-1.0.so.0 (0x00007f49e7f45000)
        libgstbase-1.0.so.0 => /usr/lib64/libgstbase-1.0.so.0 (0x00007f49e7cea000)
        libgstreamer-1.0.so.0 => /usr/lib64/libgstreamer-1.0.so.0 (0x00007f49e79da000)
        libgobject-2.0.so.0 => /usr/lib64/libgobject-2.0.so.0 (0x00007f49e7789000)
        libglib-2.0.so.0 => /usr/lib64/libglib-2.0.so.0 (0x00007f49e747a000)
        libsqlite3.so.0 => /usr/lib64/libsqlite3.so.0 (0x00007f49e71b2000)
        libfontconfig.so.1 => /usr/lib64/libfontconfig.so.1 (0x00007f49e6f75000)
        libQtOpenGL.so.4 => /usr/lib64/libQtOpenGL.so.4 (0x00007f49e6c75000)
        libGL.so.1 => /usr/lib64/libGL.so.1 (0x00007f49e69e3000)
        libX11.so.6 => /usr/lib64/libX11.so.6 (0x00007f49e66a5000)
        libgthread-2.0.so.0 => /usr/lib64/libgthread-2.0.so.0 (0x00007f49e64a2000)
        librt.so.1 => /lib64/librt.so.1 (0x00007f49e629a000)
        libpng14.so.14 => /usr/lib64/libpng14.so.14 (0x00007f49e606c000)
        libfreetype.so.6 => /usr/lib64/libfreetype.so.6 (0x00007f49e5db0000)
        libSM.so.6 => /usr/lib64/libSM.so.6 (0x00007f49e5ba8000)
        libICE.so.6 => /usr/lib64/libICE.so.6 (0x00007f49e598b000)
        libXext.so.6 => /usr/lib64/libXext.so.6 (0x00007f49e5778000)
        libdl.so.2 => /lib64/libdl.so.2 (0x00007f49e5574000)
        /lib64/ld-linux-x86-64.so.2 (0x0000564c44207000)
        liblzma.so.5 => /usr/lib64/liblzma.so.5 (0x00007f49e534d000)
        liborc-0.4.so.0 => /usr/lib64/liborc-0.4.so.0 (0x00007f49e50c9000)
        libgsttag-1.0.so.0 => /usr/lib64/libgsttag-1.0.so.0 (0x00007f49e4e8f000)
        libgmodule-2.0.so.0 => /usr/lib64/libgmodule-2.0.so.0 (0x00007f49e4c8b000)
        libffi.so.4 => /usr/lib64/libffi.so.4 (0x00007f49e4a81000)
        libpcre.so.1 => /usr/lib64/libpcre.so.1 (0x00007f49e481b000)
        libexpat.so.1 => /usr/lib64/libexpat.so.1 (0x00007f49e45f1000)
        libglapi.so.0 => /usr/lib64/libglapi.so.0 (0x00007f49e43c2000)
        libXdamage.so.1 => /usr/lib64/libXdamage.so.1 (0x00007f49e41bf000)
        libXfixes.so.3 => /usr/lib64/libXfixes.so.3 (0x00007f49e3fb9000)
        libX11-xcb.so.1 => /usr/lib64/libX11-xcb.so.1 (0x00007f49e3db6000)
        libxcb-glx.so.0 => /usr/lib64/libxcb-glx.so.0 (0x00007f49e3b9e000)
        libxcb-dri2.so.0 => /usr/lib64/libxcb-dri2.so.0 (0x00007f49e3999000)
        libxcb-dri3.so.0 => /usr/lib64/libxcb-dri3.so.0 (0x00007f49e3795000)
        libxcb-present.so.0 => /usr/lib64/libxcb-present.so.0 (0x00007f49e3592000)
        libxcb-sync.so.1 => /usr/lib64/libxcb-sync.so.1 (0x00007f49e338c000)
        libxcb.so.1 => /usr/lib64/libxcb.so.1 (0x00007f49e316b000)
        libxshmfence.so.1 => /usr/lib64/libxshmfence.so.1 (0x00007f49e2f68000)
        libXxf86vm.so.1 => /usr/lib64/libXxf86vm.so.1 (0x00007f49e2d62000)
        libdrm.so.2 => /usr/lib64/libdrm.so.2 (0x00007f49e2b52000)
        libbz2.so.1.0 => /usr/lib64/libbz2.so.1.0 (0x00007f49e2940000)
        libuuid.so.1 => /usr/lib64/libuuid.so.1 (0x00007f49e273a000)
        libXau.so.6 => /usr/lib64/libXau.so.6 (0x00007f49e2536000)

I've tried to re-install libQtOpenGL again, did not fix the problem.

Any ideas as to what that could be?

Thanks!!!

[SGaist]

Hi and welcome to devnet,

Try to re-install the complete Qt library set.

[A Former User]

@SGaist thanks, I talked to a colleague and he told me the same. This actually fixed the problem!

[SGaist]

Great !

Since you have it working now, please mark the thread as solved using the "Topic Tool" button so that other forum users may know a solution has been found :)