Port: U-Boot for BeagleBone

[Tim Kientzle]

For now, having it rely on devel/cross-* ports
should work.

Yes, the clang cross-compilers should allow us
to get rid of that dependency someday.  There
are two obstacles:
 * The clang cross-compilers aren't fully
    exposed yet (E.g., there is no arm-freebsd-cc
    symlink installed by default).
 * binutils  --  promising stuff is in the works,
    but it's at least a few months out.


On May 18, 2013, at 10:38 AM, Jason Birch wrote:
> I'm not sure how it'd work internally in the ports tree (I'm a ports
> consumer, not a contributor), but I'd find it weird if a U-Boot port
> required me to get any devel/cross-* ports if U-Boot was able to be built
> by Clang native to FreeBSD 9.X+ and I had Clang set as my CC, CPP, CXX.
> 
> I don't know the solution to this, given that it's probably not acceptable
> to have a port configuration item that says "[X] Use Clang" - that sort of
> compiler configuration is 'external' to the ports tree, if you get my
> meaning. What I mean by that is it's generally a world configuration in
> /etc/make.conf or set as an environmental variable before invoking make,
> rather than explicit port configuration.
> 
> It might be enough to just have a note in the ports tree that it will
> require devel/cross-<whatever> - I'm unaware of any other examples you
> could use for precedent, but I'm sure they would exist.
> 
> 
> On Sun, May 19, 2013 at 12:28 AM, Warner Losh <imp at bsdimp.com> wrote:
> 
>> 
>> On May 18, 2013, at 10:17 AM, Tim Kientzle wrote:
>> 
>>> 
>>> On May 18, 2013, at 5:05 AM, Andrew Turner wrote:
>>> 
>>>> On Fri, 17 May 2013 16:22:56 -0400
>>>> Tim Kientzle <kientzle at freebsd.org> wrote:
>>>> 
>>>>> I'm trying to move the actual building of boot loaders out of Crochet
>>>>> and into FreeBSD ports.
>>>>> 
>>>>> Here's the first attempt at such a port (many thanks to Diane Bruce
>>>>> for patiently tutoring me through this):
>>>>> 
>>>>> http://people.freebsd.org/~kientzle/u-boot-beaglebone.tgz
>>>>> 
>>>>> I'd appreciate any feedback:
>>>>> * Can you build this?
>>>>> * Suggestions for improving it?
>>>> 
>>>> Could you try installing devel/cross-binutils and devel/cross-gcc using
>>>> TGTARCH=arm and TGTABI=none-eabi and using these to build u-boot? It
>>>> would mean the user doesn't need to have xdev set up.
>>> 
>>> I'll definitely give that a try.
>>> 
>>> More importantly than the user, I'm concerned about the
>>> package-building cluster.  One of the goals here is to
>>> get the packages built automatically so that not everybody
>>> has to build the boot loaders themselves.
>>> 
>>> I've not used the devel/cross-ZZZ tools before, so
>>> it will take me a little while to experiment.  Ideally,
>>> the U-Boot port would just require the cross tools.
>> 
>> A long time ago I was able to build u-boot using the cross-* ports... They
>> even have wrapper ports so you can get the write dependencies. Make sure
>> these are build-time dependencies not run-time dependencies and all that
>> will be installed will be the u-boot images...
>> 
>> Warner
>> 
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