GNU bug report logs - #24832
ld-wrapper-boot0 captures the evaluation system type

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Message #28 received at 24832-done <at> debbugs.gnu.org (full text, mbox):

From: ludo <at> gnu.org (Ludovic Courtès)
To: Mark H Weaver <mhw <at> netris.org>
Cc: 24832-done <at> debbugs.gnu.org
Subject: Re: bug#24832: Hydra generates faulty derivation for gettext-boot0
Date: Fri, 20 Jan 2017 23:17:48 +0100

ludo <at> gnu.org (Ludovic Courtès) skribis:

> Hi Mark,
>
> Mark H Weaver <mhw <at> netris.org> skribis:
>
>> ludo <at> gnu.org (Ludovic Courtès) writes:
>>> The bug stems from ‘ld-wrapper-boot0’ and was introduced in
>>> d75acc293dd3e63db8739aa04c021df917aa1b80.  The problem is that
>>> ‘ld-wrapper-boot0’ uses the value of (%current-system) on the machine
>>> that builds the derivation i.e., hydra.gnu.org.
>>> 
>>> Instead, it should use the value of the system we’re building for, so
>>> its evaluation should be delayed, as is the case for ‘inputs’ fields.
>>> 
>>> The result of this bug is that ‘ld-wrapper-boot0’ is bogus on all arches
>>> except x86_64.  However, this is harmless: we don’t need this ld wrapper
>>> anyway, except for GNU/Hurd.
>>> 
>>> So, a short-term hack might be this:
>>> 
>>> diff --git a/gnu/packages/commencement.scm b/gnu/packages/commencement.scm
>>> index 53ba718..0a8e608 100644
>>> --- a/gnu/packages/commencement.scm
>>> +++ b/gnu/packages/commencement.scm
>>> @@ -424,8 +424,8 @@ the bootstrap environment."
>>>  (define ld-wrapper-boot0
>>>    ;; We need this so binaries on Hurd will have libmachuser and libhurduser
>>>    ;; in their RUNPATH, otherwise validate-runpath will fail.
>>> -  (make-ld-wrapper (string-append "ld-wrapper-" (boot-triplet))
>>> -                   #:target (boot-triplet)
>>> +  (make-ld-wrapper (string-append "ld-wrapper-" "x86_64-guix-linux-gnu")
>>> +                   #:target "x86_64-guix-linux-gnu"
>>>                     #:binutils binutils-boot0
>>>                     #:guile %bootstrap-guile
>>>                     #:bash (car (assoc-ref %boot0-inputs "bash"))))
>>> 
>>> That way, we would not have to rebuild anything (it temporarily breaks
>>> GNU/Hurd though, but that’s the cost we’d have to pay.)
>>> 
>>> How does that sound?
>>
>> Ah, nice!  Could be avoid breaking GNU/Hurd by delaying evaluation of
>> ‘ld-wrapper-boot0’ right now, but temporarily rigging it so that on all
>> _non-Hurd_ platforms, the hard-coded value "x86_64-guix-linux-gnu" is
>> used?
>
> Good idea.  I committed something along these lines as
> 5bde4503eeaa1d772744abcf87afc29eb0e9329d.
>
> We’ll have to remove the workaround on the next cycle.

Done in 168c400045bda767e9921789d93562c737b7b147 in ‘core-updates’.

Ludo’.

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