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Re: Parallel build failure on OSX

> Is that two commands creating the same directory at the same time?
I would guess two parallel make invocations both running the 
check-for-existence-otherwise-create-sequence simultaneously. So both fail 
the existence check and then both try to mkdir.

> In whick case it is a bug in the makefile.
Is it? Is it illegal for two Makefiles to have
	mkdir foo
in it and be invoked in parallel?

> OTOH mkdir failing EEXIST isn't useful - with nfs it happens if the
> response is lost and the request retried.

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