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

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Message-ID: <20201124003357.GR2672@gate.crashing.org>
Date:   Mon, 23 Nov 2020 18:33:57 -0600
From:   Segher Boessenkool <segher@...nel.crashing.org>
To:     Arvind Sankar <nivedita@...m.mit.edu>
Cc:     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 06:22:10PM -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