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Re: [cdt-dev] Passing build configuration options to a project template via a method.
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Hi Petri,
On 17 June 2011 14:24, Petri Tuononen <petri.tuononen@xxxxxxxxx> wrote:
> Ok. I can easily get checked packages and just compute paths again and set
> external settings again. However this leads to a new dilemma at which point
> should the paths be recalculated (without too much overhead).
I think I found the settings are updated when projects are imported
and opened, as well as manually (by me) when the user changes a
setting which has a knock-on on the contributed paths.
The slowness here (in my experience) is the overhead of forking
pkg-config and reading it's output. For a given set of arguments to
pkg-config I'd memoize the answer behind some soft-references, perhaps
clearing them every 5 mins. It's unlikely that paths change with any
regularity for a given version of tools on the OS.
> For Windows -mms-bitfields and e.g -pthread for Linux. I guess I can (and
> have to) pass these other way.
Ah, I see. I think we'll need an additional optional attribute to
pass generic options to various tools. Perhaps an entry type
tool_type (e.g. compiler) -> additional option (string). This
shouldn't be too hard to wire up.
> Thanks for this code excerpt. Maybe running the code in thread prevents the
> freezing of property pages and hopefully the problem that prevents showing
> the values in Settings tab in the first place.
Have a go without doing it in a job first. If it's slow we should
profile it and find out where time is going. For example time your
#getSettings method to see how long it takes for each invocation (as
well as how many times its invoked...).
> Computation time. Although I can only confirm this after the whole
> functionality I plan to do is implemented. The main reason is probably that
> all flags need to be recalculated for every checked package every time
> there's any related chance.
Caching the output from running pkg-config with a given set of
switches should help here.
Cheers,
James
