bv_qt.sh patch for X11 lib location wrong on some linux systems

[biagas]

Describe the bug

From SRE 282, customer running linux Mint, and X11 lib location is /usr/lib/x86_64-linux-gnu, but our patches for qt's linux-g++-64/qmake.conf specifies /usr/lib64 as location for X11 lib.

Do we need a way to query the system for X11 location and apply different patches based on location?

Or is there a different way to tell Qt where to search for X11?

Desktop

• OS and version: linux Mint
• VisIt Version: 3.2.0

[brugger1]

We should see what newer versions of Qt are doing to handle this and follow what they are doing.

[biagas]

I took a look at Qt 6 series, there doesn't seem to be anything new with the mkspecs files in regards to location for X11.
We still have to modify a mkspec to point to the correct location for a particular system.

Perhaps we could write a platform-specific .conf file on-the-fly, have it include the linux-g++-x64/qmake.conf but then override the X11 and OpenGL locations.

[biagas]

I created a Linux Mint Docker container, filled it with the usual development packages and the necessary X11 and libxcb packages as spelled out in Qt's Linux Requirements doc and Building Qt 5 wiki

Qt built successfully with the X11 and libxcb plugins (xcbglintegrations), and VisIt packaged up successfully.

Given this information, I don't think any patches are necessary for Qt on Linux Mint.