linux-kernel - Re: [PATCH v2 3/4] Kbuild: make DWARF version a choice

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Message-ID: <20201124165602.GA343230@rani.riverdale.lan>
Date:   Tue, 24 Nov 2020 11:56:02 -0500
From:   Arvind Sankar <nivedita@...m.mit.edu>
To:     Segher Boessenkool <segher@...nel.crashing.org>
Cc:     Arvind Sankar <nivedita@...m.mit.edu>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Jakub Jelinek <jakub@...hat.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-toolchains@...r.kernel.org,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Fangrui Song <maskray@...gle.com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Sedat Dilek <sedat.dilek@...il.com>,
        Dmitry Golovin <dima@...ovin.in>,
        Alistair Delva <adelva@...gle.com>
Subject: Re: [PATCH v2 3/4] Kbuild: make DWARF version a choice

On Mon, Nov 23, 2020 at 06:33:57PM -0600, Segher Boessenkool wrote:
> On Mon, Nov 23, 2020 at 06:22:10PM -0500, Arvind Sankar wrote:
> > Btw, is -gsplit-dwarf at all useful for assembler files?
> 
> If you invoke the assembler via the compiler, with that flag it still
> creates separate .o and .dwo files (via objcopy invocations as usual).
> Whether that is useful depends on if you have any debug info that can
> be split :-)
> 
> 
> Segher

Right, the latter was what I was really asking :) We don't currently
pass -gsplit-dwarf for assembler and I was wondering if that mattered.

Thanks.