linux-kernel - Re: plumbers session on syscall wrapping and kernel header libc circular depdence?

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Message-ID: <87lew14ag7.fsf@oldenburg.str.redhat.com>
Date:   Tue, 19 Apr 2022 12:46:48 +0200
From:   Florian Weimer <fweimer@...hat.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Arnd Bergmann <arnd@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        "Jose E. Marchesi" <jemarch@....org>,
        linux-toolchains@...r.kernel.org,
        clang-built-linux <llvm@...ts.linux.dev>,
        LKML <linux-kernel@...r.kernel.org>,
        Carlos O'Donell <carlos@...hat.com>
Subject: Re: plumbers session on syscall wrapping and kernel header libc
 circular depdence?

* Nick Desaulniers:

> Hi Florian, Arnd, and Masahiro,
> Jose and I are currently in the planning process to put together a
> Kernel+Toolchain microconference track at Linux Plumbers Conference
> this year (Sept 12-14) in Dublin, Ireland.

I'm not sure if I will be able to travel by that time.

> Would you all be interested in a session (if you're planning on
> attending) discussing syscall wrapping for libc's and UAPI circular
> dependency on the libc?
>
> Masahiro and I were recently discussing the feasibility of building
> the kernel UAPI header tests with -nostdinc, but there are some
> interesting complications perhaps worth sharing with others?

To be honest, that doesn't seem to be a good use of a session slot.
Surely we can figure out a way to solve this issue offline (and if it's
a problem worth solving)?

(I expect that using -nostdinc makes it more difficult to support
compilers which are not GCC-compatible.)

Thanks,
Florian