Re: [gentoo-dev] some portage related issues

[Robin H. Johnson]

On Tue, Apr 20, 2004 at 08:35:36PM +0300, Dan Podeanu wrote:
> # grep 2.95.3 /usr/src/linux-2.4.24-xfs-r5/README
>  - Make sure you have gcc 2.95.3 available.  gcc 2.91.66 (egcs-1.1.2) may
>
> Please note, not 2.95.3 and above (re: Greg KH). And again, compiled with
> 3.3.2 the kernel behaves strange, as opposed to when its compiled with
> 2.95.3. But thats just personal experience.
I've never experienced any troubles with GCC3.3-compiled kernels run in
a research environment.
3.1/3.2 compiled kernels did have some trouble, but it's been fixed for
GCC3.3.

>
> > > 4. It would be really nice if we had a tool to automate the detection of
> > > the build architecture (CHOST, -march & -mcpu) based on the info from
> > > /proc/cpu to help the newbie with the installation procedure.
> >
> > considering the *large* number of /proc/cpuinfo and the fact that one set
> does
> > not map properly onto the other set, this is impossible to a degree
> > (-march/-mcpu)
> >
> > in terms of CHOST, simply picking the right stage tarball would be enough
> ...
> > most people shouldnt have to change it
>
> Atleast for x86 there's a fairly small number of /proc/cpuinfo layouts. I
> cannot speak for other architectures though. And its all in the kernel
> sources, imho its fairly simple to write an automated detection system.
>
> CHOST will probably be changed by all those using stage1.
This was done a LONG time ago, and is on even the Gentoo 1.4 cds. Called
genflags, I wrote it for GCC3.2 originally, so it needs some updating to
produce results that can be used with varying GCC versions. It does
already support a much wider set of platforms than Gentoo will probably
ever support.

-- 
Robin Hugh Johnson
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