This isn't just about CVS SBCL; SB-FUTEX was removed last month before the 0.8.21 release On Tue, Apr 19, 2005 at 01:56:21PM +0200, Vincent Arkesteijn wrote:
A somewhat related problem, which will be uncovered by fixing the one that Andreas describes, surfaces when running SLIME+SBCL on a non-NPTL 2.4 kernel. :sb-thread is still on *features*, so swank:*communication-style* will be set to :spawn, but calling make-thread will then fail. Not nice.
Possible solutions: 1) Remove :sb-thread from *features* when running on a non-NPTL kernel.
I think this (and the consequently necessary changes to the fasl compatibility checker) is probably TRT, but not this close to a release.
2) Add some function or variable to SBCL that can be used to check whether threads actually work, and change SLIME to use that.
* (defun communication-style () (if (and (member :sb-thread *features*) (not (sb-alien:extern-alien "linux_no_threads_p" sb-alien:boolean))) :spawn :fd-handler)) COMMUNICATION-STYLE * (communication-style) :SPAWN ... but note that this uses implementation-internal stuff and is not guaranteed to stay working. As the useful working life of any SLIME version on SBCL rarely exceeds three months anyway, that might not be such a big deal -dan