[Scons-users] CacheDir race

[Bill Deegan]

David,

Thanks for the thorough analysis in nuitka issue
Seems like a better fix would be to do the cachedir initialization outside
of the multi-threaded path.
(In SCons initiliiazation post SConstruct processing perhaps, but before
the tree walk..)

Can you think of any reason it needs to be done in the context where it
get's called on each thread?

-Bill

On Sat, Dec 30, 2017 at 10:35 AM, David Siroky <ml at dasir.net> wrote:

> Hi!
>
> I'm running into following errors while using CacheDir and running
> parallel jobs:
>
> scons: *** [.....] AttributeError : 'EnvironmentError' object has no
> attribute 'strerror'
>
> scons: warning: Please upgrade your cache by running
> scons-configure-cache.py /home/xxxx/.build_cache
> File "/usr/lib/python2.7/threading.py", line 801, in __bootstrap_inner
>
> It happens only if the cache directory does not exist. I think the same
> problem is described also here: http://bugs.nuitka.net/issue380
>
> My working solution is to use a simple lock:
> https://github.com/dsiroky/scons/commit/212fc5e8f35c98808a42
> 75e00091f18d468e80af
>
> Since there is a note about a hazard race I wonder - is the thread lock
> good enough or are there any possible side effects?
>
> Regards,
> David
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