upgrading gcc

[Alejandro Aragon]

Hi,

I saw there is an upgrade to GCC. I saw that in order to uninstall the  
old version I have to use the -u option to the upgrade command. Now,  
the ideal thing would be of course to upgrade it and if the upgraded  
version works, to uninstall the old version. Is this something that  
can be done after upgrading? I'm concerned about not using the -u  
option and then having both the upgraded and the outdated versions of  
the same compiler in the system. Thank you all,

aa