Re: CC version conflicts--kernel vs nvidia driver

[Graeme Tank <graemet@umich.edu>]

On Tue, Jun 10, 2008 at 09:41:52PM +0300, David Baron wrote:
> On Tuesday 10 June 2008 20:18:45 debian-user-digest-request@lists.debian.org 
> wrote:
> > > I have nvidia's "proprietary" dirver 96.43.01 running well on my
> > > Debian Sid. There is a bug in the opengl which will show up, for
> > > example, rotating a piece in a jigsaw puzzle program, where areas
> > > near the cursor are incorrectly painted. Their driver is up to
> > > version .05 so I tried to install.
> > >
> > > Their .run complained about the gcc version. I noticed the
> > > kernel-compiled .ko's will show a 4.1.3. Now I compiled that kernel
> > > much more recently than that!!  Going ahead with the current 4.3.2!!
> > > will produce and un-modprobable nvidia.ko. No --force option will
> > > avail.
> > >
> > > Their instructions say set a CC environment variable. Anything I try
> > > will then produce a complain that this "compiler" cannot produce
> > > execs. I tried 4.1.3, gcc4.1.3, gcc-4.1.3 and such variations of the
> > > current version to no avail.
> > >
> > > Since the kernel compile chose this older version, recompiling clean
> > > will probably not help. What do I do to kludge this (I have sometimes
> > > succeeded in editing vermagic stuff if the result had exactly the
> > > same length but the gcc is not in this string.)
> >
> > The  following helped me:
> >
> > # cd /usr/bin
> > # rm gcc
> > # ln -s gcc-4.1 gcc
> >
> > After compiling the kernel module, you can redo the steps above with
> > gcc-4.3, or you can leave it this way.
> 
> Worked fine. Actually, the kernel used 4.2 (the module I looked at, probably 
> no longer relevant, said 4.1). All's well.
> 
> I have nine (count 'em) gcc-'s from 2.95 to 4.3. Do I need all of these?

I tend to let dselect suggest to me which packages to remove ... they
are under the "Obsolete and local packages present on system" heading. I
believe apt will also suggest obsolete packages for you to remove and
tell you how to remove them.

Using testing, my installed gcc's are:

$ COLUMNS=80 dpkg -l | grep -E "gcc |gcc\-[0-9].[0-9] "
ii  gcc            4:4.2.3-10     The GNU C compiler
hi  gcc-3.4        3.4.6-6        The GNU C compiler
ii  gcc-4.1        4.1.2-19       The GNU C compiler
ii  gcc-4.2        4.2.4-1        The GNU C compiler
ii  gcc-4.3        4.3.0-5        The GNU C compiler
$

I recall removing gcc-2.95 aways back, but it was quite the
kernel compiling workhorse for some time.

Graeme