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Re: Upstreaming the glibc Hurd port

From: Thomas Schwinge
Subject: Re: Upstreaming the glibc Hurd port
Date: Fri, 19 Jan 2018 11:10:42 +0100
User-agent: Notmuch/0.9-125-g4686d11 (http://notmuchmail.org) Emacs/25.2.2 (x86_64-pc-linux-gnu)

Hi Joseph!

On Fri, 19 Jan 2018 00:34:42 +0000, Joseph Myers <joseph@codesourcery.com> 
> On Fri, 19 Jan 2018, Samuel Thibault wrote:
> > Joseph Myers, on jeu. 18 janv. 2018 23:15:59 +0000, wrote:
> > > Thanks for the changes pushed to sthibaul/hurd-builds so far (I realise 
> > > there will be more to get it into a buildable state, e.g. the actual 
> > > libpthread implementation).
> > 
> > What I have pushed is basically only missing the libpthread
> > implementation, so you already have an idea of the minimal set of
> > modifications to get something building (and IIRC essentially passing
> > the testsuite).
> I'd still like to have the libpthread implementation there (with a view to 
> seeing if I can get build-many-glibcs.py working for Hurd with this branch 

Many thanks for your offer!  As far as I'm aware indeed nobody from the
Hurd team has spent time on that yet.

> - if the branch has sources that build for Hurd, I should have some chance 
> of using 
> https://git.savannah.gnu.org/cgit/hurd/incubator.git/tree/cross-gnu?h=cross-gnu/master
> to figure out how to do the Hurd-specific pieces that will need adding to 
> build-many-glibcs.py).

Beware that this script is from many years ago -- from times before my
dear CodeSourcery colleagues taught be how to ;-) properly build
cross-compilers.  But yes, cross-gnu did work back then.

Another thing to look into nowadays is David's (CCed) gnuxc,
<http://mid.mail-archive.com/87r3vaw4os.fsf@gmail.com> "Scripts to build
a Hurd distro", <https://github.com/dm0-/gnuxc> "GNU OS Cross-Compiler".
(I have not yet looked into that one myself.)

And, the Guix/Hurd effort also is capable of cross-compilation, as far as
I remember.  But probably cross-gnu/gnuxc will already give you enough
pointers of what needs to be done.


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