From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark H Weaver <mhw@netris.org>
Subject: Re: Problem with natively-built armhf bootstrap compiler
Date: Sat, 03 Jan 2015 13:37:44 -0500
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In-Reply-To: <87k314gael.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Fri, 02 Jan 2015 22:06:26 +0100")
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: guix-devel@gnu.org

ludo@gnu.org (Ludovic Court=C3=A8s) writes:

> Mark H Weaver <mhw@netris.org> skribis:
>
>> Mark H Weaver <mhw@netris.org> writes:
>>
>>> Any suggestions on how best to fix this?  My first crude idea is to
>>> simply remove the "-lgcc_s" from %gcc-static.
>>
>> For now, this is the approach I took, in commit 5336e4c74.
>
> Sounds good.
>
> I was tempting to do something like this:
>
> diff --git a/gnu/packages/gcc.scm b/gnu/packages/gcc.scm
> index a7156bf..dd33a26 100644
> --- a/gnu/packages/gcc.scm
> +++ b/gnu/packages/gcc.scm
> @@ -213,7 +213,7 @@ where the OS part is overloaded to denote a specific =
ABI---into GCC
>                     ;; below, make sure to update the relevant code in
>                     ;; %gcc-static package as needed.
>                     (format #f "#define GNU_USER_TARGET_LIB_SPEC \
> -\"-L~a/lib %{!static:-rpath=3D~a/lib %{!static-libgcc:-rpath=3D~a/lib64 =
-rpath=3D~a/lib -lgcc_s}} \" ~a"
> +\"-L~a/lib %{!static:-rpath=3D~a/lib %{!static-libgcc:-rpath=3D~a/lib64 =
-rpath=3D~a/lib %{pthread: -lgcc_s}}} \" ~a"
>                             libc libc libdir libdir suffix))
>                    (("#define GNU_USER_TARGET_STARTFILE_SPEC.*$" line)
>                     (format #f "#define STANDARD_STARTFILE_PREFIX_1 \"~a/=
lib\"
>
> I believe this is enough to address what the comment mentions (glibc
> dlopening libgcc_s for pthread functions), but this will need testing.
>
> WDYT?

I confess I don't know enough about the relevant details to know whether
this would work reliably -- e.g. will -pthread always be passed to gcc
at link time whenever this problem would arise? -- but it certainly
looks like a cleaner solution in principle.

I'm glad to defer to your judgement on how best to fix this :)

   Thanks!
     Mark