Re: [jamboost] [BBv2] qt.jam glitches

From: Jürgen Hunold (hunold+lists.Boost_at_[hidden])
Date: 2003-09-18 04:17:40

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Hi Volodya !

On Thursday 18 September 2003 11:01, Vladimir Prus wrote:
> [snip]
>
> Thanks for reporting those. I'll look at them in more detail a little
> bit later, but I've an interesting remark to make....

Thanks. Its not that important, because I've got workarounds.

> > Third, generated include paths.
> > This is a real show stopper. I tried to compile RailSys with msvc
> > and it stops due to command line overflow. This is due to the fact
> > that the generated include paths of some 30 libraries appear on the
> > commandline for the main() routine and bjam (cl.exe) chokes on
> > this...
>
> You might not believe, but this issue is already in my optimization
> todo for M8. Not only that, it's right at the top of priority queue.

Cool !

> > What I need is the following: Each library/exe should only its use
> > its own generated includes.
> > And I need to explicitly include generated include path from child
> > and sister-projects. Without this feature, my test case would not
> > work, because I have to add generated include path for lib/gui to
> > app in order to #include "hello_world_widget.h" in main.cpp.
>
> What a coincidence! Unless I've misunderstood you, you proposing just
> what I meant to implement.
>
> 1. Automatic dependency on generated headers works only within one
> main target.

Right. Exactly.

> 2. It should be possible to explicitly specify other main target, if
> using headers from it, like
>
> exe main : main.cpp : <implicit-dependency>cpp_parse ;
>
> Is that what you propose, too?

Yes. But I'll need this feature in the corresponding top-level Jamfile.
That means when I have

project/lib/widgets
project/lib/gui
project/lib/whatver
project/app/app1
project/app/app2

then I'd like project/Jamfile to contain <implicit-dependency>lib/gui 
and <implicit-dependency>lib/widgets in order to propagete both 
depencies to all sub-projects. I need this to support some legacy 
projects with broken and/or circular depencies *sigh*

If this is possible, then you've got exactly what I need.
This would be great, because I'll then have more projects to test V2 on 
win32.

Yours,

Jürgen

- -- 
* Dipl.-Math. Jürgen Hunold ! Institut für Verkehrswesen, Eisenbahnbau
* voice: ++49 511 762-2529 ! und -betrieb, Universität Hannover  
* fax : ++49 511 762-3001 ! Appelstrasse 9a, D-30167 Hannover
* hunold_at_[hidden] ! www.ive.uni-hannover.de
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