DIET is itself written in C/C++ and for limited parts in java. DIET is based on CORBA and thus depends on the chosen CORBA implementation. Additionally, some of DIET extensions make a strong use of libraries themselves written in C/C++ and java. Thus, we could expect DIET to be effective on any platform offering decent version of such compilers.
DIET undergoes daily regression tests (see http://cdash.inria.fr/CDash/index.php?project=DIET) on various hardwares, a couple of Un*x based operating systems (under different distributions), MacOSX and AIX, and mainly with GCC. But thanks to users reports (punctual deployments and special tests conduced before every release), DIET is known to be effective on a wide range of platforms.
Nevertheless, if you encounter installation difficulties don't hesitate to post
on DIET's users mailing list: diet-usr@listes.ens-lyon.fr (for the
archives refer to http://graal.ens-lyon.fr/DIET/mail-lists.html). If you
find a bug in DIET, please don't hesitate to submit a bug report on
http://graal.ens-lyon.fr/bugzilla. If you have multiple bugs to report,
please make multiple submissions, rather than submitting multiple bugs in a
single report.