Re: [Boost-build] Problem with notfile target

Subject: Re: [Boost-build] Problem with notfile target
From: Vladimir Prus (ghost_at_[hidden])
Date: 2008-11-29 13:57:39

On Saturday 29 November 2008 21:05:45 Steven Watanabe wrote:
> AMDG
> 
> Ian Emmons wrote:
> >> Probably, instead of adding the target to sources, you can use
> >>
> >>     <dependency>JniHeaders
> >>
> >> in requirements?
> >>
> >> - Volodya
> >
> > Thanks for the quick reply.
> >
> > Your suggestion does indeed cause the JniHeaders target to run before 
> > the library is built, but it has two undesirable side effects:
> >
> > * It causes the library is completely rebuilt every time, as if I did 
> > a bjam --clean beforehand.
> 
> notfile targets are always built.  You can try something like:
> 
> make JniHeaders.txt : : @BuildJniHeaders ;
> alias JniHeaders : JniHeaders.txt ;
> actions BuildJniHeaders
> {
>     ant jniHeaders
>     echo Updated >$(<)
> }
> 
> so that bjam has something to check the timestamp of.

But on the other hand, while always running 'ant' might be reasonable, I
am not sure that causing dependents of notfile to be always rebuilt makes
sense.

I guess I can make it not happen -- does that seem right?

- Volodya

-- 
Vladimir Prus
http://vladimir_prus.blogspot.com
Boost.Build V2: http://boost.org/boost-build2