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Subject:	Re: cygwin1.dll 3.5.0-1 appears to cause spurious "error 127" with
	make 4.4.1
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From:	Dimitry Andric via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Dimitry Andric <dimitry AT unified-streaming DOT com>
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On 26 Feb 2024, at 18:30, Marco Atzeri via Cygwin <cygwin AT cygwin DOT com> wrote:
> 
> On 26/02/2024 18:16, Dimitry Andric via Cygwin wrote:
>> On 26 Feb 2024, at 18:00, Marco Atzeri via Cygwin <cygwin AT cygwin DOT com> wrote:
>>> 
>>> On 26/02/2024 17:34, Dimitry Andric via Cygwin wrote:
>>>> Hi,
>>>> After a recent upgrade of a Cygwin installation, including cygwin1.dll
>>>> (see https://cygwin.com/pipermail/cygwin/2024-February/255308.html) to
>>>> 3.5.0-1, I now get spurious "error 127" messages from (Cygwin's copy of)
>>>> GNU make 4.4.1-2, when it starts external processes and those external
>>>> processes exit with a zero exit code.
>>>> For example, a very simple Makefile:
>>>> all:
>>>> cmd /c echo done
>>>> Running this a few times in a Cygwin bash prompt, gives:
>>>>   Dim AT kilchoman ~/foobar
>>>>   $ make
>>>>   cmd /c echo done
>>>>   done
>>>>   Dim AT kilchoman ~/foobar
>>>>   $ make
>>>>   cmd /c echo done
>>>>   done
>>>>   make: *** [Makefile:2: all] Error 127
>>> 
>>> this smells as a lost race with your AV
>>> can you tell it to not bother the Cygwin directory ?
>> I have no antivirus program except Microsoft's built-in thing, but even
>> if I completely disable that, it makes no difference.
> 
> can you follow https://cygwin.com/problems.html and:
> Run cygcheck -s -v -r > cygcheck.out and include that file as an attachment in your report.
> maybe we found some additional suggestion for you

I don't think that will be needed, cygwin1-3.6.0-0.32.g10c8c1cf4f94.dll
seems to solve the issue. I can reproduce with cygwin1-3.5.0-1.dll, but
not with 3.4.10-1, nor any dll after 3.6.0-0.32.g10c8c1cf4f94. (I tried
the whole range, from 3.6.0-0.32.g10c8c1cf4f94 through
3.6.0-0.58.g4af5f9d51e1d.dll and they all work.)

My best guess is on
https://www.cygwin.com/cgit/newlib-cygwin/commit/?id=084f848ab9a51d0125491a6f2a7a741f9df73218
("Cygwin: console: Fix exit code for non-cygwin process") by Takashi
Yano, who I've CC'd for confirmation. Indeed, the specific ingredient
for my issue was starting a non Cygwin console binary such as cmd.exe.

-Dimitry


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