linux-kernel - Re: [PATCH v6 2/2] Kbuild: implement support for DWARF v5

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Message-ID: <20210129205702.GS4020736@tucnak>
Date:   Fri, 29 Jan 2021 21:57:02 +0100
From:   Jakub Jelinek <jakub@...hat.com>
To:     Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     Sedat Dilek <sedat.dilek@...il.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Clang-Built-Linux ML <clang-built-linux@...glegroups.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        linux-arch <linux-arch@...r.kernel.org>,
        Fangrui Song <maskray@...gle.com>,
        Caroline Tice <cmtice@...gle.com>,
        Nick Clifton <nickc@...hat.com>, Yonghong Song <yhs@...com>,
        Jiri Olsa <jolsa@...nel.org>,
        Andrii Nakryiko <andrii@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Arvind Sankar <nivedita@...m.mit.edu>
Subject: Re: [PATCH v6 2/2] Kbuild: implement support for DWARF v5

On Fri, Jan 29, 2021 at 12:48:11PM -0800, Nick Desaulniers wrote:
> > Should this be...?
> >
> > KBUILD_AFLAGS += -Wa,-gdwarf-5
> 
> No; under the set of conditions Clang is compiling .c to .S with DWARF
> v5 assembler directives. GAS will choke unless told -gdwarf-5 via
> -Wa,-gdwarf-5 for .c source files, hence it is a C flag, not an A

Wasn't that fixed in GAS?
https://sourceware.org/bugzilla/show_bug.cgi?id=27195

	Jakub