Patrick, are you referring to http://modules.sourceforge.net ? (Not all build systems are especially happy with its use of LD_LIBRARY_PATH, I think, fwiw.) Bill, can you describe your situation a little better? - Dan Patrick Begou via Gcc-help <gcc-help@xxxxxxxxxxx> schrieb am So., 17. Okt. 2021, 01:59: > Le 17/10/2021 à 04:16, Bill Cunningham via Gcc-help a écrit : > > I am partially complete with a build of gcc-11.2.0. The thing is > > that I need the system to recognize the gcc driver I am calling on. I > > will also be working on two glibcs, but first thing first. > > > > There is the system gcc, and the test gcc. Of course I can only > > get the system gcc to work. Can the $PATH variable be changed to > > access the test gcc, which btw, is not fully complete? Or can sym > > links be used in a very skillful manner. I have read both these ways > > can, somehow, be used. But I would think gcc runtime switches would > > work. The system is considering these two gccs as different as their > > triplets are different. > > > > > To uses several flavor of a same software, have a look at the > environment module. On my cluster It allows users to select gcc6, gcc9 > or gcc10 flavor easily in production, setting PATH, > LD_LIBRARY_PATH,....etc. with "module load" / "module unload" commands. > > Patrick > >