From: Marc Glisse <marc.glisse@inria.fr>
To: Florian Weimer <fweimer@redhat.com>
Cc: gcc@gcc.gnu.org
Subject: Re: Triggering -save-temps from the front-end code
Date: Mon, 28 Nov 2022 18:18:40 +0100 (CET) [thread overview]
Message-ID: <bf20a3eb-531e-1295-f1ef-7f086c9a6089@inria.fr> (raw)
In-Reply-To: <87pmd7rzkd.fsf@oldenburg.str.redhat.com>
On Mon, 28 Nov 2022, Florian Weimer via Gcc wrote:
> * Arsen Arsenović:
>
>> Hi,
>>
>> Florian Weimer via Gcc <gcc@gcc.gnu.org> writes:
>>
>>> Unfortunately, some build systems immediately delete the input source
>>> files. Is there some easy way I can dump the pre-processed and
>>> non-preprocessed sources to my log file? I tried to understand how
>>> -save-temps for crash recovery works, but it seems that this runs
>>> outside of the frontend, in the driver.
>>
>> Would dumping unconditionally into some "side channel" -dumpdir be a
>> sufficient workaround?
>
> Of the file names overlap, and it seems in this case, the dump files are
> just overwritten. I don't see a way to make the file names unique.
>
> I guess for the tough cases, I can just keep running the build under
> strace.
You could override unlink with LD_PRELOAD. Use a special purpose
filesystem (gitfs? I haven't tried it yet). Wrap gcc with a command that
calls the true gcc with a different TMPDIR / -dumpdir each time.
--
Marc Glisse
prev parent reply other threads:[~2022-11-28 17:18 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-28 11:28 Florian Weimer
2022-11-28 11:44 ` Richard Biener
2022-11-28 13:02 ` Arsen Arsenović
2022-11-28 13:14 ` Florian Weimer
2022-11-28 17:18 ` Marc Glisse [this message]
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