compiler question

[Net Llama!]

On Mon, 21 Jul 2003, Tony Alfrey wrote:
> I see that more and more stuff will require gcc 3.3 and I've been
> running gcc 2.95.2.  So can someone tell me what potential problems I
> might have if I install 3.3.  Specifically

I just wrote a gcc-3.3 SxS.

> a)  will 3.3 prevent me from now making small changes in my 2.4.4 kernel
> previously compiled with 2.95.2?

Looks like Redhat has built a 2.4.21 kernel with gcc-3.3.  Now I don't
know what you mean by a 'small change'.  I'd say that its not a good idea
to build new kernel modules with one compiler, and the kernel with
another, regardless of the versions of gcc.

> b)  Will I need some special tools to go with 3.3  (I'll of course read
> the read me about things I'll need for 3.3)

See my SxS.

> c)  Is there some clever way that I might switch between 2.95.2 and 3.3?
> gcc at the command line presumably knows only my most recent compiler.

See my SxS.  There are a few different tricks, but i've found setting the
CC env var to the location of the gcc that you wish to use to be the best
solution.

> General suggestions about switching would be appreciated.

I've not run into any gcc specific problems since upgrading.  Now going to
glibc-2.3.x is another story altogether (mucho headaches).

-- 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Lonni J Friedman				netllama at linux-sxs.org
Linux Step-by-step & TyGeMo		     http://netllama.ipfox.com