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Re: gcc-ddc


From: Jan Nieuwenhuizen
Subject: Re: gcc-ddc
Date: Sat, 02 Dec 2017 15:48:12 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/25.3 (gnu/linux)

Gábor Boskovits writes:

> Aside from these libtool files we can now say, that this ddc project 
> succeeded.

Wait... The libtool's .la files are now the only files that show any
difference, even when gcc is compiled into it's own prefix?  That's amazing!!!

> I've contacted the libtool developers if we can extend the wrapper approach 
> to the .la files.

Great!

> It seems, that in some older version of libtool those were just sourced as 
> shell script, but
> I don't know if now they do something more fancy with it or not...
> Anyways, if it's just shell script, then the environment variable approach 
> can also work out there.
> The only problem seems, that I should do the substitution before checksumming 
> the compiler.
> I think I can inject something into the makefile, or use a patched vesion of 
> libtool.
>
> A patched libtool could be a better option, so other ddc projects can use it.

Indeed.

> I guess I can do something like add an environment variable 
> GUIX_INSTALL_DIRECTORY, or something like that...

What's different about GUIX_INSTALL_DIRECTORY than the usual: PREFIX?

> Any maybe name this version libtool-for-ddc.
> It should be noted in the package documentation, that this package is not 
> recommended for general use.

Are you proposing to patch libtool?  If so, even if patching it for
[gcc-]dcc only would be a great hack for now.  Please go forward with
that idea at least until libtool devs help us with a full solution.

janneke

-- 
Jan Nieuwenhuizen <address@hidden> | GNU LilyPond http://lilypond.org
Freelance IT http://JoyofSource.com | Avatar® http://AvatarAcademy.com



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