From: Alexei Starovoitov <alexei.starovoitov@gmail.com>
To: Yonghong Song <yhs@fb.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Arnaldo Carvalho de Melo <arnaldo.melo@gmail.com>,
dwarves@vger.kernel.org, Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Bill Wendling <morbo@google.com>, bpf <bpf@vger.kernel.org>,
Kernel Team <kernel-team@fb.com>
Subject: Re: [PATCH dwarves 3/3] dwarf_loader: add option to merge more dwarf cu's into one pahole cu
Date: Fri, 26 Mar 2021 16:12:39 -0700 [thread overview]
Message-ID: <CAADnVQ+MT_u7q7veB_ws8PZ0XC0v2f2=P-TnzOBbaahbvYRDwQ@mail.gmail.com> (raw)
In-Reply-To: <74e25d53-1e36-03a0-2de5-bd2d349a4a7f@fb.com>
On Fri, Mar 26, 2021 at 4:05 PM Yonghong Song <yhs@fb.com> wrote:
>
> Now since you found gcc actually has flags in dwarf tag producer which
> will provides whether lto is used, I went on clang side found that
> the following flag is needed in clang in order to embed flags in
> the producer tag:
> -grecord-gcc-switches
...
> In Linux:
> - add flag -grecord-gcc-switches if clang lto is enabled.
I think that will help to make dwarf output a bit more uniform between
gcc and clang. So it's a good thing on its own.
Recording compilation flags in the debug info could be useful in
other cases too. I would pass it for both lto and non-lto builds.
next prev parent reply other threads:[~2021-03-26 23:13 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-25 6:53 [PATCH dwarves 0/3] add option to merge more dwarf cu's into Yonghong Song
2021-03-25 6:53 ` [PATCH dwarves 1/3] dwarf_loader: permits flexible HASHTAGS__BITS Yonghong Song
2021-03-26 23:13 ` Andrii Nakryiko
2021-03-26 23:26 ` Yonghong Song
2021-03-29 14:02 ` Arnaldo Carvalho de Melo
2021-03-31 4:30 ` Andrii Nakryiko
2021-03-25 6:53 ` [PATCH dwarves 2/3] dwarf_loader: factor out common code to initialize a cu Yonghong Song
2021-03-25 6:53 ` [PATCH dwarves 3/3] dwarf_loader: add option to merge more dwarf cu's into one pahole cu Yonghong Song
2021-03-26 14:41 ` Arnaldo Carvalho de Melo
2021-03-26 15:18 ` Yonghong Song
2021-03-26 17:35 ` Arnaldo Carvalho de Melo
2021-03-26 18:19 ` Arnaldo Carvalho de Melo
2021-03-26 23:05 ` Yonghong Song
2021-03-26 23:12 ` Alexei Starovoitov [this message]
2021-03-26 23:17 ` Yonghong Song
2021-03-29 14:04 ` Arnaldo Carvalho de Melo
2021-03-26 15:18 ` Arnaldo Carvalho de Melo
2021-03-26 23:21 ` Andrii Nakryiko
2021-03-27 0:19 ` Yonghong Song
2021-03-25 13:10 ` [PATCH dwarves 0/3] add option to merge more dwarf cu's into Arnaldo Carvalho de Melo
2021-03-26 1:41 ` Yonghong Song
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