Re: [jamboost] Re: Some 'stage' changes

From: Vladimir Prus (ghost_at_[hidden])
Date: 2005-01-24 03:06:06

Hi Reece,

> >>The rule should match this prototype:
> >>
> >> rule name ( name : type ? : property-set )
> >
> > Volodya, could you please add an example for this ?
> > I admit I'm lost :-)
>

> # debug/release pseudo-code
>
> rule variant-target ( name : type ? : property-set )
> {
> modifier = "-";
> if <variant> in property-set
> {
> switch property-set:<variant>
> {
> case "release" : name += "r" ;
> case "debug" : name += "d" ;
> case "profile" : name += "p" ;
> }
> }
> if "$(modifier)" == "-"
> {
> modifier = "" ; # no modifiers selected
> }
> return name + modifier ;

That's almost what 'stage.rename' rules does ;-)

> using:
>
> exe app1 : ... : <tag>@rule.simple-target ;
> exe hello : .. : <tag>@rule.variant-target ;
>
> stage dist : app1 hello ;
>
> and:
>
> bjam release gcc-3.3
> will produce:
> dist/app1.exe
> dist/hello-r.exe
> bjam debug gcc-3.3
> will produce:
> dist/app1.exe
> dist/hello-d.exe
>
> Is this right?

That's right.

> >>Things left to do:
> >>- rename 'stage' to 'install'
> >>- implement proper versioning support for dynamic libraries
> >
> > That would be cool.
>
> Seconded. I would also like to propose having a default <tag> rule, like
> my simple-target above, as well as having several common implementations
> (in a target.jam?) This would make it easier to say:
>
> exe app : ... : <tag>@target.boost-target ; # -dm-gcc3_3

The 'stage' rule provides two rules for you: 'add-variant' and 
'add-variant-and-compiler'. The first adds just debug/release/threading 
letters, the second also adds toolset name.

> Also, how about having <tag> being heirarchial, where you can specify it
> in a project decleration to say all targets in this project use these
> rules (e.g. boost), while allowing you to override this in sub-projects
> (e.g. examples use standard-target rules), targets (this target uses
> variant-target rules) and stage rules (e.g. this stage uses boost naming
> rules). Thoughts?

This can be implemented is needed. Simple things first ;-)

> It might be useful to have a short-hand for simple-target, something
> like <tag>"".

You can achieve this effect by not specifying any <tag> at all, I think.

- Volodya