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Message-ID: <15afcdeb-100a-4c2f-aebd-01baace3eb0e@SystematicSW.ab.ca>
Date: Mon, 9 Feb 2026 23:55:00 -0700
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Subject: Re: Cygwin 3.7.0 HEAD, posix_spawn() failures on Win10?
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From: Brian Inglis via Cygwin <cygwin@cygwin.com>
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Cc: Brian Inglis <Brian.Inglis@SystematicSW.ab.ca>
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On 2026-02-09 08:07, Lionel Cons via Cygwin wrote:
> On Mon, 9 Feb 2026 at 13:23, Dan Shelton via Cygwin <cygwin@cygwin.com> wrote:
>>
>> On Sat, 31 Jan 2026 at 17:11, Dan Shelton <dan.f.shelton@gmail.com> wrote:
>>>
>>> Hello, on Cygwin 3.7.0-0.382.gab4d1afb5e1e.x86_64 on
>>> CYGWIN_NT-10.0-19045, is anyone else getting posix_spawn() errors when
>>> using clang?
>>>
>>> I get these errors:
>>> 0 [main] clang-21 1687 child_info_fork::abort:
>>> \??\C:\cygwin64\bin\cygintl-8.dll: Loaded to different address:
>>> parent(0x44D0000) != child(0x1A0000)
>>>
>>> clang: error: unable to execute command: posix_spawn failed: Resource
>>> temporarily unavailable
>>
>> 7.22AM:
>> We updated to cygwin 3.7.0-0.390.gede7cbc9946b.x86_64, the
>> posix_spawn() in clang.exe does not work.
>>
>> Maybe clang is broken?
> 
> Try this procedure to rebase all DLLs of all packages:
> 1. reboot machine
> 2. open admin terminal, run /usr/bin/rebase-trigger full, close terminal
> 3. run Cygwin setup.exe, just run it without installing anything. Do not abort!
> 4. reboot machine
> 
> IMO it would be cool if there is a tool which could be called from
> powershell or cmd.exe

DIY - Exit or shutdown all other Cygwin services and processes then:

$ cygstart dash
$ exit

In dash shell window:

$ rebase-trigger full
$ rebaseall

or equivalent - YMMV! ;^>

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

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retrancher  but when there is no more to cut
                                 -- Antoine de Saint-Exupéry

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