Fedora and Cross Compiling

[David Smith]

David Woodhouse wrote:
> On Fri, 2007-06-15 at 07:59 -0500, David Smith wrote:
>> Note that we leave things so that native compiles still work.  We then 
>> check native dependencies (_arch == _build_arch) against our mock 
>> chroot's native rpm database, then check cross dependencies (_arch != 
>> _build_arch) against the mock chroot's target rpm database.
>>
>> Target versions of autoconf and sed aren't needed since nothing links 
>> against anything in those packages (those packages are only run 
>> natively).  The only problem with this scheme is that we end up with an 
>> extra native dependency of libblah-devel (which really isn't needed 
>> since nothing links against it in the cross compile).  But the benefit 
>> of unaffected native compiles outweighed the extra dependency.
> 
> I might go so far as to suggest that the benefit of avoiding that
> %if "%{_arch" == "%{_build_arch}" stuff in the specfile might outweigh
> the extra dependencies on autoconf and sed, too.
> 
> One way of handling dependencies in mock for cross-builds might be to
> install the full set of dependencies for _both_ host and target
> architectures. 

I certainly see your point, but when bootstrapping an arch you sometimes 
get in these cases where X requires Y which requires Z which requires X, 
so you have to start chopping requires down to the minimal.

Plus, if a native require is for something quite complicated like perl 
or python, you typically want to postpone that pain for as long as 
possible...

-- 
David Smith
dsmith at redhat.com
Red Hat
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