On Thu, Apr 07, 2016 at 04:07:25PM +0300, Manolis Ragkousis wrote:
> Hey Ludo,
> 
> I have reproduced the problem on the latest master targeting i686-linux
> and arm-linux-gnueabihf.
> 
> The problem is that those libraries will fail to build when glibc is not
> present. Also if target os is none, this problem will not appear because
> the libs will not get built at all.
> 
> You can reproduce it with ./pre-inst-env guix build -e '((@@(gnu
> packages cross-base) cross-gcc) "arm-linux-gnueabihf")'
> 
> This does not happen when targeting mips.
> 
> I have added an explanation to the patch and a link to this thread.
> 
> Manolis

This patch was instrumental in building aarch64 bootstrap tarballs.
Without it, when building the cross-gcc compiler from x86_64 to aarch64
it would fail to compile when trying to build libitm. Searching around
the internet suggested that this was only when building a cross-compiler
that targeted C++ and not only C.

I understand that it's too late to push this to core-updates, but we
should push it to core-updates-next.


> From dc8154ef19bc28886f350f42c49fb7995eefcec8 Mon Sep 17 00:00:00 2001
> From: Manolis Ragkousis <manolis837@gmail.com>
> Date: Tue, 16 Feb 2016 15:06:33 +0200
> Subject: [PATCH] gnu: cross-gcc-arguments: Disable libitm, libvtv and
>  libsanitizer.
> 
> * gnu/packages/cross-base.scm (cross-gcc-arguments)[arguments]: Add
>   "--disable-libitm", "--disable-libvtv" and "--disable-libsanitizer"
>   when libc is not present.
> ---
>  gnu/packages/cross-base.scm | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/gnu/packages/cross-base.scm b/gnu/packages/cross-base.scm
> index 8bd599c..bd7a1e7 100644
> --- a/gnu/packages/cross-base.scm
> +++ b/gnu/packages/cross-base.scm
> @@ -120,6 +120,14 @@ may be either a libc package or #f.)"
>                                 "--disable-libquadmath"
>                                 "--disable-decimal-float" ;would need libc
>                                 "--disable-libcilkrts"
> +
> +                               ;; When target is any OS other than 'none' these
> +                               ;; libraries will fail if there is no libc
> +                               ;; present. See
> +                               ;; <https://lists.gnu.org/archive/html/guix-devel/2016-02/msg01311.html>
> +                               "--disable-libitm"
> +                               "--disable-libvtv"
> +                               "--disable-libsanitizer"
>                                 )))
>  
>                   ,(if libc
> -- 
> 2.7.2
> 


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