I'd prefer Kumba's machine specific profiles. Of course, that's the one
that's the biggest PITA to implement/update.
Salmon Leap Consulting
On Aug 30, 2005, at 8:18 AM, Stephen P. Becker wrote:
> Hi folks,
> With the somewhat recent introduction of support for a wide variety of
> SGI machines under gentoo, expanding to include all of Indy/Indigo2,
> Origin, Octane, Indigo2 Impact (ip28), and O2, I've noticed more than
> just a handful of new users have had problems when getting to the
> kernel compile phase of the install. The problem is that on systems
> that only run 64-bit kernels, you need a mips64-unknown-linux-gnu
> toolchain to build the kernel. Since the userland is all 32-bit, the
> native toolchain isn't good enough to compile the kernel. However, we
> do provide a proper toolchain via the gcc-mips64 ebuild. Furthermore,
> binutils supports mips64 by default, but symlinks must exist such that
> we have mips64-unknown-linux-gnu-ld -> ld, etc. Both of these are
> automatically provided during emerge system if you use the correct
> profile, which is default-linux/mips/mips64/2005.0 currently.
> The problem is that all of our stages ship with
> default-linux/mips/2005.0 as the default profile, which does *not*
> provide gcc-mips64 and the binutils symlinks. Therefore if a user
> didn't know any better and didn't change their profile appropriately,
> they would be stuck while trying to build their kernel because the
> native 32-bit toolchain in the userland will just spit out errors and
> die when compiling the kernel. Of course, this is easily fixed by
> emerging gcc-mips64 and running "binutils-config --mips", which will
> set up a proper toolchain. However, by that time, the user is
> discouraged a bit and inevitably finds our irc channel and whines that
> Gentoo is broken.
> Now, I have a few ideas for getting around this. Obviously whatever
> is decided should be added to the documentation, but here are some
> A) Do nothing...document in the handbook that if your machine is
> 64-bit, you *must* select the mips64 sub-profile. (I don't like this
> because some folks may be confused as to why everything still works
> just fine with the mips profile, and/or they will just skim over that
> and keep going)
> B) Similar to A, except ship stages without the profile set. That
> way, folks really are stuck until they set the proper profile. (I
> don't like this because they could still be confused and set the mips
> C) Make default-linux/mips/ provide all the 64-bit stuff and get rid
> of the mips64 sub-profile, since all of the SGI machines we support
> can run 64-bit kernels if you so choose (ip22 is the only system that
> supports a 32-bit kernel at this time).
> D) (Kumba's idea here...) Have machine specific profiles, e.g.
> default-linux/mips/ip22, default-linux/mips/ip32, etc. (This could be
> really useful because it would allow us to do some other machine
> specific voodoo in the profile).
> Any thoughts?
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