On Mon, 2007-11-05 at 19:03 +0900, John Summerfield wrote:
bruce wrote:
hi...
a basic question.
fc6 comes with gc4.1 . i'm looking to test gc4.2, and would like to have a parallel dev environment so i have both 4.1 and 4.2.
i'm trying to find pointers on what needs to be done, to make sure i don't screw up the current 4.1 environment.
it appears that all i need to do is to set a prefix dir when i do the initial configure.
--./configure --prefix=/gcc42 --make --make install
this appears to place everything under the gcc42 top level dir. however, what will i need to do to actually be able to hook into the libs/objs created by the gcc4.2 build. what will i have to insert into my paths, or rather where should the information be placed.. in the bashrc/profile files/etc...
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.
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).
Ralf