linux-kernel - Re: [PATCH] include/linux/compiler*.h: make compiler-*.h mutually exclusive

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Message-ID: <20180823011002.GB6244@nautica>
Date:   Thu, 23 Aug 2018 03:10:02 +0200
From:   Dominique Martinet <asmadeus@...ewreck.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Joe Perches <joe@...ches.com>,
        Jonathan Corbet <corbet@....net>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Arnd Bergmann <arnd@...db.de>,
        David Woodhouse <dwmw@...zon.co.uk>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Will Deacon <will.deacon@....com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Peter Anvin <hpa@...or.com>
Subject: Re: [PATCH] include/linux/compiler*.h: make compiler-*.h mutually
 exclusive

Linus Torvalds wrote on Wed, Aug 22, 2018:
> I've fixed that manually, but when I tried to test it I just hit the
> 
>   arch/x86/Makefile:179: *** Compiler lacks asm-goto support..  Stop.
> 
> error.
> 
> Do you have some experimental clang build with asm goto support? What
> version? Or is it just that you're building ARM, not x86?

I'm not building linux directly, but BPF programs that indirectly uses
clang with bcc

On fedora you can install bcc-tools and run
e.g. /usr/share/bcc/tools/execsnoop that will compile something at
runtime.
If the package isn't available for your distro you can just install bcc
and run the script from their repo[1]

[1] https://raw.githubusercontent.com/iovisor/bcc/master/tools/execsnoop.py


Thanks,
-- 
Dominique