hi, ive been looking for a version of the 'G++' C++ compiler program for linux on google for a while and cant seem to find any place to download a copy, is this program actually proprietory software made by silicon graphics? (the pc's at school we are using this on are SG indy's and O2's running IRIX (not sure what version)

if it is propritory to SG, is there a compiler that will work similarly to this one?
or if anyone has a link they can provide me could you post it please?

im only asking this because of problems with cross compatibility (borland on XP and the G++ program) but im not 100% sure if i may encounter the same problem with using 2 different versions of a C++ compiler even though they are both 'unix' based programs.

thanks for any help