Re: [Boost-build] Registering a second unrelated type with the same extension.

From: Vladimir Prus (ghost_at_[hidden])
Date: 2007-10-25 05:08:37

Jurko Gospodnetić wrote:

>> Just to clarify -- there's are two mapping here. One is suffix -> type,
>> used when we need to decide what's the type of the source file, and
>> another is type->suffix, used to decide what's the suffix to use
>> on generated targets. The first mapping, naturally, does not allow
>> duplicate suffixes, but the second one does.
>> 
>> It's possible to first declare a type with no suffixes, and then
>> use type.set-generated-target-suffix to specify generated suffix
>> explicitly.
>> 
>> Will it help in your case?
> 
> Yup, we tested this and it does help in our case. We still need to
> use the technique in the actual projects but I will get to that some
> time later today and I do not expect it to cause any problems.
> 
> Extender documentation does mention this rule but I would suggest
> updating the docs to include both the explanation given in your previous
> post (about theer being two mappings and the type.register parameter
> being used to populate both of them) and possibly a paragraph such as:
> 
> 'Types not used to model source but only generated files should
> specify their file extension using the type.set-generated-target-suffix
> Boost.Build rule. This allows them to exist even if some other used
> Boost.Build module already defines a type with the same suffix name.'

I've filed https://zigzag.cs.msu.su:7813/boost.build/ticket/152
and assigned it to Milestone 14, which is the documentation milestone release.

Thanks,
Volodya