Developing for Cygwin from POSIX host

Developing for Cygwin from POSIX host

[John Scott]

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Hi,

I'm writing an application in C that's increasingly dependent on the POSIX 
APIs and would like to use the Cygwin DLL to help port it to Windows. I 
currently use MinGW-w64 but foresee that will stop being sufficient eventually.

I want to do this using only free software without a Windows installation. A 
GNU/Linux to Cygwin cross compiler doesn't seem available, at least on Debian. 
Cygwin also fails to run under Wine.

I'm not interested in the Cygwin userspace, I just need the POSIX layer. Aside 
from booting up a ReactOS VM, is there a more clean way to do what I seek to 
do?

Thanks,
John

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Re: Developing for Cygwin from POSIX host

[Brian Inglis]

On 2020-08-06 19:58, John Scott via Cygwin wrote:
> I'm writing an application in C that's increasingly dependent on the POSIX 
> APIs and would like to use the Cygwin DLL to help port it to Windows. I 
> currently use MinGW-w64 but foresee that will stop being sufficient eventually.
> 
> I want to do this using only free software without a Windows installation. A 
> GNU/Linux to Cygwin cross compiler doesn't seem available, at least on Debian. 
> Cygwin also fails to run under Wine.

Should work as there are fixes in each for the other.

> I'm not interested in the Cygwin userspace, I just need the POSIX layer. Aside 
> from booting up a ReactOS VM, is there a more clean way to do what I seek to 
> do?

There's a Fedora->Cygwin cross environment documented in:

	https://cygwin.com/pipermail/cygwin/2020-July/245695.html

or your local copy from July 27-28.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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Re: Developing for Cygwin from POSIX host

[Hamish McIntyre-Bhatty]

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On 07/08/2020 05:56, Brian Inglis wrote:
> On 2020-08-06 19:58, John Scott via Cygwin wrote:
>> I'm writing an application in C that's increasingly dependent on the POSIX 
>> APIs and would like to use the Cygwin DLL to help port it to Windows. I 
>> currently use MinGW-w64 but foresee that will stop being sufficient eventually.
>>
>> I want to do this using only free software without a Windows installation. A 
>> GNU/Linux to Cygwin cross compiler doesn't seem available, at least on Debian. 
>> Cygwin also fails to run under Wine.
> Should work as there are fixes in each for the other.
>
I tried this a while back too, before I gave up and used a Windows VM.
Cygwin currently doesn't seem to work in wine, sadly. It does almost
work though, by the looks of it. I'm going to see if I can report some
bugs on WineHQ if any of the Wine developers are interested.

Hamish


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RE: Developing for Cygwin from POSIX host

[Hamish McIntyre-Bhatty]

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So I reported that it doesn't work on WineHQ, and there was a helpful comment that suggests recompiling WINE with a patch can get it working.

Here are the links, hopefully this isn't too late to be useful:

Bug report: https://bugs.winehq.org/show_bug.cgi?id=48891
Patch: https://bugs.winehq.org/attachment.cgi?id=67113&action=diff

Hamish


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