Re: Parallel jobs with order-only prerequisites

[Steven Simpson]

On 13/10/14 08:45, Steven Simpson wrote:
> There's a relationship between %.done and %.api, which is that %.api 
> is a (potentially non-updating) by-product of building %.done, and 
> that information is needed for parallelism, but it can't be 
> represented using : or :| between them.
>
> However, I just tried adding:
>
> bar.api: | bar.src
> baz.api: | baz.src
>
> ...and that appears not to break the serial semantics I've managed to 
> get, while making it work in parallel too!

This turns out to be one of the things I'd already tried.  A 
profile-influencing change to bar causes it to be recompiled, and 
bar.api to be restamped.  However, it isn't detected by foo, until Make 
is invoked again.  This only happens on a parallel build.