cygwin64: Issue with sigaddset

Richard Elberger
Mon Feb 23 14:52:00 GMT 2015

Awesome ;)  Thanks so much I will keep a look out for it and verify on my end that the perl unit test works as expected.

> On Feb 23, 2015, at 7:42 AM, Corinna Vinschen <> wrote:
> Hi Richard,
> On Feb 21 16:17, Richard Elberger wrote:
>> Hello,
>> I found this while trying to compile perl 5.20.1 on latest cygwin64
>> (just updated yesterday).
>> Effectively, sigaddset is adding a signal along these lines.  If
>> signal x is less than 32, then two signals are added: x and x+32.  If
>> signal x is greater than 32, then again two signals are added, x and
>> x-32.
>> It’s been far too many years since I’ve written C but the attached
>> code snippet to prove it (hopefully it proves it) … and running the
>> same “code” (I put that in quotes because it’s like preschool C) on
>> any Linux works as expected - just adding the one signal.
>> This is causing the sigset.t test for the POSIX module in perl core to
>> fail.  There are a ton of other failures in testing 5.20.1 core but
>> hopefully they’re not all cygwin related like this one.
> Thanks a lot for the testcase.  I fixed the problem (an int overflow
> computing a bit mask) in CVS.  I'll generate a developer snapshot on
> and probably another Cygwin 1.7.35 test
> release soon.  Both will contain that patch.
> Thanks,
> Corinna
> -- 
> Corinna Vinschen                  Please, send mails regarding Cygwin to
> Cygwin Maintainer                 cygwin AT cygwin DOT com
> Red Hat

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