From: "Carlos O'Donell" <carlos@systemhalted.org>
To: noloader@gmail.com
Cc: Peng Yu <pengyu.ut@gmail.com>, libc-help <libc-help@sourceware.org>
Subject: Re: Best reference for understanding ELF format
Date: Tue, 20 Apr 2021 12:51:43 -0400 [thread overview]
Message-ID: <CAE2sS1jHb39bLGtRZuqEaEOGu-HXHB1NxSfoSxPgXQG0VFWcEA@mail.gmail.com> (raw)
In-Reply-To: <CAH8yC8=5f2vbP4NtHs6Zt2tTQnJG60z2Pdbep4QZ404iiQvr4w@mail.gmail.com>
On Tue, Apr 20, 2021 at 12:39 PM Jeffrey Walton via Libc-help
<libc-help@sourceware.org> wrote:
>
> On Tue, Apr 20, 2021 at 12:29 PM Peng Yu via Libc-help
> <libc-help@sourceware.org> wrote:
> > ...
> > People don't usually directly call ld to generate object, executable
> > or shared library files.
> >
> > Instead, gcc/clang are called. So there is nothing wrong to say those
> > files are produced by gcc/clang, at least at a superficially level.
> > You can say that gcc/clang don't directly produce the ELF files.
> > Nevertheless, this doesn't add too much to the topic of this thread.
>
> I think Clang can produce object files directly. Clang has an
> integrated assembler.
Conceptually the point is the same though.
The compiler relies on an assembler and static linker to generate the
object files.
Whether that assembler is a library and the invocation is a library
call, or it's a secondary process via a pipe, the concept being
discussed is the same.
The compiler itself (language front end, or driver) doesn't produce
ELF format object files. Technical clarity around these distinctions
helps at a later stage when we're trying to explain other concepts
where the distinction matters or where the distinction is muddled e.g.
LTO, ThinLTO etc.
Cheers,
Carlos.
next prev parent reply other threads:[~2021-04-20 16:51 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-16 3:38 Peng Yu
2021-04-16 3:47 ` Mike Frysinger
2021-04-17 12:31 ` Peng Yu
2021-04-19 7:29 ` Szabolcs Nagy
2021-04-19 7:53 ` Florian Weimer
2021-04-20 1:58 ` Peng Yu
2021-04-20 7:08 ` tomas
2021-04-20 13:19 ` Mike Frysinger
2021-04-20 13:40 ` Peng Yu
2021-04-20 14:18 ` Mike Frysinger
2021-04-20 15:12 ` Peng Yu
2021-04-20 16:39 ` Jeffrey Walton
2021-04-20 16:51 ` Carlos O'Donell [this message]
2021-04-21 3:19 ` Peng Yu
2021-04-20 17:55 ` Mike Frysinger
2021-04-20 18:01 ` Mike Frysinger
2021-04-20 8:14 ` Jeffrey Walton
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