[build2] -s switch

[Moldmann Max (DC-MH/ENG52-NA)]

Just noticed that it is possible to combine the -s switch with the --jobs switch. And it looks like this will then do the match phase in parallel which is all I wanted. 
 
Thanks,
Max

-----Original Message-----
From: Boris Kolpackov [mailto:boris at codesynthesis.com] 
Sent: Friday, February 9, 2018 8:32 AM
To: Moldmann Max (DC-MH/ENG52-NA) <Max.Moldmann at boschrexroth-us.com>
Cc: users at build2.org
Subject: Re: [build2] -s switch

Moldmann Max (DC-MH/ENG52-NA) <Max.Moldmann at boschrexroth-us.com> writes:

> The -s switch is perfect to quickly see the first compilation problem.
> But as it only uses a single core the target update operation takes a 
> long time compared to a normal multicore build. Thus the idea to maybe 
> have the target update operations run in parallel, but then switch 
> back to single core for the actual compilation.

Ok, firstly, what you call "target update" is called "match phase" and "actual compilation" -- "execute phase".

While theoretically we could run the match phase in parallel and execute serially, I don't think it will (always) do what you want: imagine you have 100 source files that need recompilation and the error is in the last one. In your proposed mode you will end up waiting on serial compilation of 99 files before seeing the error.

Boris