GNU bug report logs - #54407
Issues building grub for powerpc64le, could not force big-endian

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From: Maxime Devos <maximedevos <at> telenet.be>
To: Christopher Baines <mail <at> cbaines.net>
Cc: 54407 <at> debbugs.gnu.org
Subject: bug#54407: Issues building grub for powerpc64le, could not force big-endian
Date: Thu, 18 Aug 2022 10:14:27 +0200

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On 18-08-2022 10:11, Maxime Devos wrote:
>
>
> On 04-04-2022 21:37, Christopher Baines wrote:
>>> Maybe you could add a gcc compiling for 32-bit ppc (maybe without a
>>> glibc since this is grub) and patch the configuration script to use the
>>> 32-bit ppc gcc instead of using the 64-bit ppc+-m32?
>> I've had a go at this, using something like what I've included below,
>> but I haven't stumbled upon the right options yet, or a way to work out
>> why gcc still thinks "-m32 not supported". [...]
>
> I was thinking of skipping the multilib and maybe skipping support for 
> multiple endians, something like:
>
>> (use-modules (guix utils) (guix packages) (guix gexp))
>> (define (ppc-32bit-gcc)
>>   (if (%current-target-system)
>>       (error "not supported -- TODO make a cross-compiler to 32-bit 
>> ppc here with cross-gcc")
>>       (package
>>         (inherit (@ (gnu packages gcc) gcc))
>>         (arguments
>>           (substitute-keyword-arguments
>>             (package-arguments (@ (gnu packages gcc) gcc))
>>             ((#:system _) "ppc-linux")
>>             ((#:configure-flags flags)
>>              (pk 'f #~(append (list "--with-endian=big") #$flags))))))))
>> (ppc-32bit-gcc)
> (currently compiling, let's see if if it works ...)

The #:system doesn't work, trying

> (use-modules (guix utils) (guix packages) (guix gexp))
> (define (ppc-32bit-gcc)
>   (if (%current-target-system)
>       (error "not supported -- TODO make a cross-compiler to 32-bit 
> ppc here with cross-gcc")
>       (package
>         (inherit (@ (gnu packages gcc) gcc))
>         (arguments
>           (substitute-keyword-arguments
>             (cons* #:system "powerpc-linux" (package-arguments (@ (gnu 
> packages gcc) gcc)))
>             ((#:configure-flags flags)
>              (pk 'f #~(append (list "--with-endian=big") #$flags))))))))
> (ppc-32bit-gcc)
instead.

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