From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Cross-building GHC
Date: Fri, 15 Mar 2013 00:20:30 +0100
Message-ID: <8738vxh8ld.fsf@gnu.org>
References: <87sj443got.fsf@karetnikov.org> <87620trip2.fsf@gnu.org>
	<87obelg5iu.fsf@karetnikov.org>
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In-Reply-To: <87obelg5iu.fsf@karetnikov.org> (Nikita Karetnikov's message of
	"Thu, 14 Mar 2013 23:12:09 +0400")
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To: Nikita Karetnikov <nikita@karetnikov.org>
Cc: bug-guix@gnu.org

Nikita Karetnikov <nikita@karetnikov.org> skribis:

>> You mean it _tries_ to use it, because it=E2=80=99s not available in chr=
oot
>> builds, right?
>
> It'll try to use '/usr/bin/ld' if I run 'unset COMPILER_PATH'.  I guess
> that it's trying to autodetect the right linker during './configure'.
>
> However, if I run
>
> export COMPILER_PATH=3D/nix/store/khdyz3i5aih56lxfk6hjvp3884apm7qb-gcc-cr=
oss-mips64el-linux-gnu-4.7.2/libexec/gcc/mips64el-linux-gnu:/nix/store/khdy=
z3i5aih56lxfk6hjvp3884apm7qb-gcc-cross-mips64el-linux-gnu-4.7.2/libexec/gcc=
/mips64el-linux-gnu/4.7.2
>
> to specify the location of subprograms, it'll complain about
> unrecognized opcodes.  For example:

Yes, because COMPILER_PATH will influence both the native and the
cross-compiler.  Same problem as discussed at
<http://gcc.gnu.org/ml/gcc/2013-02/msg00124.html>.  That makes
COMPILER_PATH unusable in this context.

We need to check how to collect2 finds the cross ld, and adjust our
cross-GCC accordingly.

(That=E2=80=99s admittedly very vague, but finding out the details is left =
as an
exercise to the reader.  ;-)).

Thanks,
Ludo=E2=80=99.