On 2 June 2011 13:17, Bill Cunningham wrote: > > Ok but I have another question concerning gcc. I would like to have 2 > compilers. A default and one perhaps in /usr/local or another directory. How > can I switch back and forth between which compiler I want? The same way you'd choose between any two programs in different locations. You could adjust your $PATH or write a script which calls the one you want. I have a handful of versions installed in ~/gcc/ and invoke them via a script like #!/bin/bash : ${ver:=4.7} : ${libdir:=lib64} $HOME/gcc/$ver/bin/g++ -Wl,-rpath,$HOME/gcc/$ver/$libdir -Wall -g "$@"