[Scons-dev] Likely bug - installing side effect files

[Bill Deegan]

Another important function of SideEffect() is that you are indicating you
don't care if there are multiple ways to build the same file.

On Mon, Nov 3, 2014 at 7:36 AM, Kenny, Jason L <jason.l.kenny at intel.com>
wrote:

> Honestly I view sideeffect as a result ( ie a side effect) of not wanting
> to fix the builder up. PDB files are side effects file that might exists is
> some flags are set. Honestly it better to handle them as targets.
> Jason
>
> -----Original Message-----
> From: Scons-dev [mailto:scons-dev-bounces at scons.org] On Behalf Of Dirk
> Bächle
> Sent: Monday, November 3, 2014 8:38 AM
> To: scons-dev at scons.org
> Subject: Re: [Scons-dev] Likely bug - installing side effect files
>
> On 03.11.2014 14:44, Ben Golding wrote:
> > Hi Dirk,
> >
> > Thanks for the clarification.
> >
> > Nevertheless, what effect does this "marking" of the side effect file
> actually have during the build? What can I usefully do with the object
> returned by SideEffect()?
> Not very much, I'm afraid...and why would you want to anyway? I'm not a
> native speaker, so take it with a grain of salt please that it appears
> obvious to me, that declaring a file as "SideEffect" means that I don't
> really care about it.
>
> > Does it have an effect during the parallel build? (like a mutex,
> > restricting that only one builder instance can run concurrently if
> > they share the same hard-coded filename)
> Yes, it does exactly that.
> >
> > > Another thing that "SideEffect()" does, is to mark the file for
> > > getting removed on a "scons -c". In the past, this has misled many
> > > writers of builders/tools, to use SideEffect() in favour of the more
> correct Clean()...
> >
> > If you are correct, this behaviour is certainly in contradiction with
> the docs:
> > http://scons.org/doc/latest/HTML/scons-user/apd.html#f-sideeffect
> In the passage above I was referring to the "might be removed as part of
> cleaning the directory in which it lives" part...sorry, if this got you
> confused.
>
> Regards,
>
> Dirk
>
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