cnd_timedout returns immediately when built with MinGW

[Tim Rühsen]

Hi,

I am at switching wget2 multithreading from C99+glthreads to C11 
(threads.h).

The tests work well on Linux (amd64) (Debian unstable/testing/stable, 
Fedora 35, Arch, Alpine/muslc) with native builds (gcc or clang).

But they completely fail when cross-building with MinGW64 (on Debian 
bookworm).

It looks like cnd_timedwait() always immediately returns with 1, no 
matter what timeout is specified. The cond is initialized and the mutex 
is locked.

Using cnd_wait() instead of cnd_timedwait() works well, but I'd prefer 
having using a timeout to catch some corner cases.

Is this a known issue ?

Regards, Tim

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