QX11Application error in building visit

[iulian787]

Hello,
I am trying to build visit on a ubuntu 20.04 platform, and I think the requirements on qt6 are met
https://doc.qt.io/qt-6/linux-requirements.html

Also, qt6, vtk9 builds succeed in third_party fodler

while building visit, I get an error like this:
/scratch/iulian/build_visit/visit/src/winutil/WindowMetrics.C: In member function 'void WindowMetrics::MeasureScreen(bool)':
/scratch/iulian/build_visit/visit/src/winutil/WindowMetrics.C:211:71: error: 'QX11Application' is not a member of 'QNativeInterface'
211 | auto x11NativeInterface = qApp->nativeInterfaceQNativeInterface::QX11Application();
| ^~~~~~~~~~~~~~~
/scratch/iulian/build_visit/visit/src/winutil/WindowMetrics.C:211:87: error: no matching function for call to 'QApplication::nativeInterface< >()'
211 | auto x11NativeInterface = qApp->nativeInterfaceQNativeInterface::QX11Application();
| ^
Any suggestions?
Thanks

[markcmiller86]

I am running into this same issue on another (newer) platform. I haven't debugged it yet because I don't understand it. X11 appears to be installed on the platform where I am building.

[iulian787]

I have an ubuntu 20.04 system on which the build succeeds;

I am seeing a difference in the qt configuration output; I am not sure if this is important or not:
on the system it suceeds:

147   X11 specific:
148     XLib ................................. yes
149     XCB Xlib ............................. yes
150     EGL on X11 ........................... no
151     xkbcommon-x11 ........................ yes
152     xcb-sm ............................... yes

On the ubuntu 20.04 system where it fails :
  X11 specific:
    XLib ................................. yes
    XCB Xlib ............................. yes
    EGL on X11 ........................... no
    xkbcommon-x11 ........................ yes
    xcb-sm ............................... no

What library would need to be installed for xcb-sm to turn to true?

[cyrush]

It's hard to find pointers on what exactly covers xcb-sm, but here is a recommendation for all x deps:

$ sudo apt install '^libxcb.*-dev' libx11-xcb-dev libglu1-mesa-dev libxrender-dev libxi-dev libxkbcommon-dev libxkbcommon-x11-dev

from:
https://forum.qt.io/topic/140822/qt-6-4-1-build-from-source-can-t-get-xcb-configured/10

[iulian787]

Thanks for the reply
The administrators installed more libraries with
apt install '^libxcb.*-dev'
there are now 34 libraries that matchlibxcb*-devon the system (before were only 12)

The visit build completed, but I encountered a new problem in packaging, the error was this:

Run CPack packaging tool...
CPack: Create package using TGZ
CPack: Install projects
CPack: - Run preinstall target for: VISIT
CPack: - Install project: VISIT []
Symlinking current to 3.4.0
CMake Error: failed to create symbolic link '/usr/local/current': Permission denied

That is probably a different issue, I think this one is solved
Thanks!

[biagas]

CMake Error: failed to create symbolic link '/usr/local/current': Permission denied

CMake Error: failed to create symbolic link '/usr/local/current': Permission denied

@iulian787 This error message is benign and can be ignored.