Re: gcc-ddc

[Gábor Boskovits]

Ok, I will do that.

I can eliminate differences in the wrappers easily, then I will look into the libtool patch.

It seems, that the la files are causing the checksum difference in cc1 and cc1plus, because if I remove libraries from the checksum, then they agree.

I also checked the same things when I compile with clang. The differences are the same, so we can do this. The rest is just "cosmetics".

2017-12-02 15:48 GMT+01:00 Jan Nieuwenhuizen <address@hidden>:

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

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