==== Libraries and software that the program depends on ====
RedHat Enterprise Linux 8 (CentOS 8) does not seem to provide by default the needed Qt libraries. They can be installed using
dnf install https://extras.getpagespeed.com/redhat/8/noarch/RPMS/getpagespeed-extras-release-8-6.el8.gps.noarch.rpm
In addition, the qt-settings RPM may have to be installed. It is available from EPEL, or also from Fedora 29.
In case of other '''Fedora''' or Redhat Enterprise Linux ('''RHEL'''; same as CentOS) distributions, you may have to
yum install qt qt-x11
if you get the error message
xdsgui: error while loading shared libraries: libQtGui.so.4: cannot open shared object file: No such file or directory
or similar for libQtCore.so.4.
If in case of RHEL or related distributions you don't know the name of the package, e.g.
yum provides "*/libQtCore.so.4"
would tell you about it.
'''Ubuntu''' needs the libglu1-mesa package if you get the error message