From mboxrd@z Thu Jan  1 00:00:00 1970
From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=)
Subject: Re: Initial cross-compilation support
Date: Thu, 28 Mar 2013 14:38:07 +0100
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References: <87txoxv7x9.fsf@gnu.org> <201303031726.08488.andreas@enge.fr>
	<8738wcyxs7.fsf@gnu.org> <87wqsrrho3.fsf@karetnikov.org>
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In-Reply-To: <87wqsrrho3.fsf@karetnikov.org> (Nikita Karetnikov's message of
	"Thu, 28 Mar 2013 13:35:08 +0400")
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To: Nikita Karetnikov <nikita@karetnikov.org>
Cc: bug-guix@gnu.org

Nikita Karetnikov <nikita@karetnikov.org> skribis:

> I tried to add
>
>   "--with-arch=3Dmips64"
>   "--with-abi=3D64"
>
> to '#:configure-flags' of 'cross-gcc'.  It failed:

So it=E2=80=99s glibc that fails to build, but the initial =E2=80=9Csans li=
bc=E2=80=9D
cross-compiler is correctly built.

> /nix/store/g9js73bwv1fl92h1nnf50vf1619irnxf-gcc-cross-sans-libc-mips64el-=
linux-gnu-4.7.2/libexec/gcc/mips64el-linux-gnu/ld: /nix/store/g9js73bwv1fl9=
2h1nnf50vf1619irnxf-gcc-cross-sans-libc-mips64el-linux-gnu-4.7.2/lib/gcc/mi=
ps64el-linux-gnu/4.7.2/libgcc.a(_fpcmp_parts_tf.o): ABI is incompatible wit=
h that of the selected emulation

This may indicate that glibc was built for N32, whereas libgcc &
co. were built for N64.

Can you run =E2=80=98file=E2=80=99 on libgcc.a (or one of the .o files it c=
ontains)?
Can you check in the glibc log whether a -mabi flag is passed?

You may need to explicitly add -mabi=3D64 for glibc.  It should be
possible to do it with something like:

  #:configure-flags '("CFLAGS=3D-mabi=3D64 -g -O2")

HTH,
Ludo=E2=80=99.