Things are installed directly into $PREFIX rather than appropriate subdirectories
GLE 4.3.4 installs these documentation files:
$PREFIX/doc/ChangeLog.txt
$PREFIX/doc/README.txt
$PREFIX/doc/LICENSE.txt
$PREFIX/doc is the wrong place to install such files. They need to go into a standard directory ($PREFIX/doc is not) and one specific to your software. For example, $PREFIX/share/doc/gle-graphics would be a sensible location.
Similarly, GLE 4.3.4 installs the directory $PREFIX/font/. Like doc, font is not a legal top-level directory name according to the FHS. In GLE 4.2.5, the font directory was inside $PREFIX/share/gle-graphics/$VERSION/.
GLE 4.3.4 installs $PREFIX/glerc and $PREFIX/init.tex. These too need to go to appropriate FHS-compliant subdirectories.
Changes have been made to make installation FHS compliant. see this #49
Closing