pthread_key_create and !-lpthreads binaries

[Daniel Eischen]

Sent from my iPhone

On Mar 13, 2011, at 3:33 PM, Robert Watson <rwatson at freebsd.org> wrote:

> 
> Dear threading folk:
> 
> This afternoon I wrote some threaded code for Mac OS X, and then checked it out on FreeBSD and was a bit surprised when it compiled but didn't work. Turns out, of course, that on Mac OS X I'd omitted -lpthread and not noticed, as the thread primitives are in libSystem.  It ran, and the reason I ran into trouble is that, although no-op locking calls are fine, getting back "success" from pthread_key_create() when it has actually failed is problematic.
> 
> Would it be possible to make the thread stub for pthread_key_create() return an error, instead of succeeding (but not actually succeeding)?  Or, perhaps better yet, I should get a link-time error for that function, even though I shouldn't get one for lock/unlock?
> 
> Thanks,
> 
> Robert N M Watson
> Computer Laboratory
> University of Cambridge
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