I have just finished building of the tag SRC680_m36 on GNU/Linux.
Issues in this build include #i26463# and #i26851#.
The first one is about including GTK files and the second one is known build issue in
psprint module.
The devel branch of my build system is now updated to this tag and you can find patches for those issues in it (vcl-disable-gtk and cupsmgr).
And of course: modules print_header and gtk are missing, so please do
not ask about them ;-)