linux-kernel - Re: [PATCH] x86: vdso: Fix leaky vdso link with CC=clang

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Message-ID: <47d4b24e-8c60-fb3b-3377-62d20c5f3dd1@zytor.com>
Date:   Thu, 12 Jul 2018 13:25:10 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Alistair Strachan <astrachan@...gle.com>,
        linux-kernel@...r.kernel.org
Cc:     Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        x86@...nel.org, kernel-team@...roid.com, joel@...lfernandes.com
Subject: Re: [PATCH] x86: vdso: Fix leaky vdso link with CC=clang

On 07/12/18 13:10, Alistair Strachan wrote:
> The vdso{32,64}.so can fail to link with CC=clang when clang tries to
> find a suitable GCC toolchain to link these libraries with.
> 
> /usr/bin/ld: arch/x86/entry/vdso/vclock_gettime.o:
>   access beyond end of merged section (782)
> 
> This happens because the host environment leaked into the cross
> compiler environment due to the way clang searches for suitable GCC
> toolchains.
> 

Is this another clang bug that you want a workaround for in the kernel?

	-hpa