From: LIU Hao <lh_mouse@126.com>
To: Richard Biener <richard.guenther@gmail.com>,
Florian Weimer <fweimer@redhat.com>
Cc: gcc@gcc.gnu.org, Jonathan Yong <10walls@gmail.com>,
Jan Hubicka <hubicka@ucw.cz>, Nathan Sidwell <nathan@acm.org>
Subject: Re: libgcov, fork, and mingw (and other targets without the full POSIX set)
Date: Fri, 1 Dec 2023 17:23:53 +0800 [thread overview]
Message-ID: <9fad1568-cb0c-4985-bc07-34f32c454503@126.com> (raw)
In-Reply-To: <CAFiYyc08h-jgE8=cOPGnP9NUVNtbr1EtES8TF1=cqrmentErSA@mail.gmail.com>
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在 2023/12/1 17:09, Richard Biener via Gcc 写道:
> Hmm, so why's it then referenced and not "GCed"?
>
> The classical "solution" is to make the reference weak via sth like
>
> extern typeof(fork) fork () __attribute__((weak));
There are issues about weak symbols on mingw targets. Calls to weak functions can jump to random,
non-allocated memory and cause faults. Instead, duplicates of COMDAT sections are removed by the
`.linkonce discard` directive.
--
Best regards,
LIU Hao
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next prev parent reply other threads:[~2023-12-01 9:24 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-01 8:02 Florian Weimer
2023-12-01 8:19 ` Eli Zaretskii
2023-12-01 9:00 ` LIU Hao
2023-12-01 9:16 ` Alexander Monakov
2023-12-01 8:42 ` Richard Biener
2023-12-01 8:57 ` Florian Weimer
2023-12-01 9:09 ` Richard Biener
2023-12-01 9:23 ` LIU Hao [this message]
2023-12-01 9:23 ` Alexander Monakov
2023-12-01 10:48 ` Andreas Schwab
2023-12-01 12:03 ` Jan Hubicka
2023-12-01 12:09 ` Jakub Jelinek
2023-12-07 12:50 ` Mark Wielaard
2023-12-08 13:59 ` Florian Weimer
2023-12-10 9:27 ` LIU Hao
2023-12-11 6:48 ` Florian Weimer
2023-12-08 8:53 Julian Waters
2023-12-11 12:38 Julian Waters
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