From: "chuanqi.xcq" <yedeng.yd@linux.alibaba.com>
To: "Iain Sandoe" <iain@sandoe.co.uk>,
"GCC Development" <gcc@gcc.gnu.org>,
"Nathan Sidwell" <nathanmsidwell@gmail.com>
Cc: "Nathan Sidwell" <nathanmsidwell@gmail.com>,
"Jonathan Wakely" <jwakely.gcc@gmail.com>,
"David Blaikie" <dblaikie@gmail.com>,
"ben.boeckel" <ben.boeckel@kitware.com>
Subject: Re: Naming flag for specifying the output file name for Binary Module Interface files
Date: Tue, 13 Dec 2022 11:10:52 +0800 [thread overview]
Message-ID: <f9204eaa-c083-4358-b957-2a44fa5fa437.yedeng.yd@linux.alibaba.com> (raw)
In-Reply-To: <3c9bfafd-9898-ca67-b629-5a23fec58792@acm.org>
[-- Attachment #1: Type: text/plain, Size: 2460 bytes --]
Hi Nathan,
> 1) Are these flags silently ignored, if no module output is to be generated? Or is some kind of diagnostic generated?
Currently, clang will generate the unused-command-line-argument warning for this case:
```
argument unused during compilation: '-fmodule-output' [-Wunused-command-line-argument]
```
> 2) what happens if you specify both -- do you get two outputs, a diagnostic, or
is one silently selected?
If someone specify both `-fmodule-output` and `-fmodule-output=/path`,
the `-fmodule-output=/path` will be selected always no matter what the order is.
And if multiple `-fmodule-output=/path` are specified, the last one will be selected.
> 3) What is the behaviour if compilation fails? Does nothing happen to the file
indicated (potentially leaving an older version there), or does the equivalent
of 'rm -f $MODULE.pcm' happen?
The module file will be deleted. The behavior is the same with `-o`.
Thanks,
Chuanqi
------------------------------------------------------------------
From:Nathan Sidwell <nathan@acm.org>
Send Time:2022年12月12日(星期一) 22:30
To:Iain Sandoe <iain@sandoe.co.uk>; GCC Development <gcc@gcc.gnu.org>
Cc:Nathan Sidwell <nathanmsidwell@gmail.com>; Jonathan Wakely <jwakely.gcc@gmail.com>; David Blaikie <dblaikie@gmail.com>; ben.boeckel <ben.boeckel@kitware.com>; chuanqi.xcq <yedeng.yd@linux.alibaba.com>
Subject:Re: Naming flag for specifying the output file name for Binary Module Interface files
On 12/9/22 12:33, Iain Sandoe wrote:
> Hello all.
>
>> On 9 Dec 2022, at 01:58, chuanqi.xcq <yedeng.yd@linux.alibaba.com> wrote:
>>
>> It looks like `-fmodule-file` is better from the discussion. So let's take it. Thanks for everyone here
>
> So FAOD (after this discussion) Chuanqi's current patchset implements the following in clang:
>
> -fmodule-output
>
> - this causes the BMI to be saved in the CWG with the basename of the source file and a suffix of .pcm.
>
> -fmodule-output=<path>
>
> - this causes the BMI to be saved at the path specified.
>
1) Are these flags silently ignored, if no module output is to be generated? Or
is some kind of diagnostic generated?
2) what happens if you specify both -- do you get two outputs, a diagnostic, or
is one silently selected?
3) What is the behaviour if compilation fails? Does nothing happen to the file
indicated (potentially leaving an older version there), or does the equivalent
of 'rm -f $MODULE.pcm' happen?
nathan
--
Nathan Sidwell
next prev parent reply other threads:[~2022-12-13 3:10 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-06 21:03 David Blaikie
2022-12-07 0:35 ` Nathan Sidwell
2022-12-07 1:45 ` Jonathan Wakely
2022-12-07 2:30 ` chuanqi.xcq
2022-12-07 15:23 ` Jonathan Wakely
2022-12-07 15:45 ` ben.boeckel
2022-12-07 16:18 ` Iain Sandoe
2022-12-07 16:29 ` ben.boeckel
2022-12-07 16:52 ` Nathan Sidwell
2022-12-07 16:58 ` Iain Sandoe
2022-12-07 17:00 ` Nathan Sidwell
2022-12-09 1:58 ` chuanqi.xcq
2022-12-09 17:33 ` Iain Sandoe
2022-12-09 17:43 ` David Blaikie
2022-12-12 14:30 ` Nathan Sidwell
2022-12-13 3:10 ` chuanqi.xcq [this message]
2022-12-13 15:56 ` David Blaikie
2022-12-14 9:56 ` chuanqi.xcq
2022-12-14 18:39 ` David Blaikie
2022-12-14 22:29 ` Nathan Sidwell
2022-12-15 5:58 ` chuanqi.xcq
2022-12-15 7:37 ` Iain Sandoe
2022-12-15 13:21 ` ben.boeckel
2022-12-07 16:43 ` Nathan Sidwell
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