[Lazarus] Compiling IDE to QT5 fails on Ubuntu

[Ross Hemingway]

Per my forum post 
https://forum.lazarus.freepascal.org/index.php/topic,59843.0.html

Ubuntu 20, using the 2.2.2 deb files to install.

The IDE rebuild fails to complete with QT5 selected.  The error looks to 
be that a makefile script (idepkg) is checking for existence of 
/usr/share/lazarus//<version-n>//units/x86_64-linux/qt5 and has fatal 
error due not allowed to create directory.  An empty qt and gtk2 
directory exists here, and was created as part of the deb file install, 
but not a qt5 directory.   None of the IDE rebuild files get stored 
here, but the makefile is still checking and has fatal error if 
directory qt5 is not found.    Issue seems to be some aspects of the old 
IDE rebuild process still exist, where it would place the revised units 
directly into the /usr/.. directories.

Solution: (easy)  have the deb install script create the missing empty 
/usr/share/laz...../qt5 dir per above, or (harder) fix the idepkg 
makefile to stop checking for locations it no longer uses.


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