Ralf Corsepius wrote:
On Mon, 2007-11-05 at 19:03 +0900, John Summerfield wrote:
The standard way in this case is to follow the supplier's advice:FSF in this case. It should install to /usr/local, well out of your way and defined by standards to be used this way.
If you do this, you are replacing the "system compiler" with a local one (/usr/local is special to gcc!). You will rarely want to do this under linux.
It's true that installing binaries to /usr/local/bin makes it the default compiler, but you do get to choose with your PATH settings.
Much less error prone is to install to a prefix != /usr and prefix != /usr/local.
The LSB recommended way would be to install to /opt or a subdirectory thereof (e.g. --prefix=/opt/gcc42).
/opt commonly seems to be populated with rpms. I'd keep out of it:
07:56 [root@numbat ~]# rpm -qf /opt/Adobe/Reader8/bin/acroread AdobeReader_enu-8.1.1-1 07:56 [root@numbat ~]#
I prefer --prefix=/usr/local/gcc42 over /opt anything. The vendor (Fedora in this case) is forbidden the use of /usr/local (and /var/local) beyond the basic layout whereas vendors often use /opt.