Re: [Boost-build] Toolset inheritance

From: Edward Diener (eldiener_at_[hidden])
Date: 2020-02-22 20:20:47

On 2/21/2020 9:23 PM, Steven Watanabe via Boost-build wrote:
> AMDG
> 
> On 2/19/20 11:45 PM, Edward Diener via Boost-build wrote:
>> I am working on a new compiler toolset, call it X, which uses another
>> toolset, call it Y, to compile/link in order to build the same type of
>> targets. The only the slight differences between toolset X and toolset Y
>> is centered on the fact that toolset X has its own header files and
>> standard library, whereas toolset Y normally used the header files and
>> standard libraries of anothewr toolset Z. I am a little bit hazy on how
>> toolset inheritance works to achieve what I want to do. I understand I
>> can use the toolset.inherit_generators, toolset.inherit_rules and the
>> toolset.inherit_flags to inherit these things from Y to X. What I do not
>> understand is how to change something toolset X inherits from toolset Y,
>> such as a rule, with its actions, or a flag.
>>
>> Do I just place X's own version of a toolset rule and/or its action in
>> toolset X's jamfile to override what is inherited from tollset Y ? If so
>> can I replace either the rule or its action independently of each other.
>>
> 
> Yes.
> 
>> Do I just specify X's own toolset.flags invocation in X's jamfile to
>> override some flag X inherited from Y ?
>>
> 
> You can only add to the flags.  If you use define flags
> that match the inherited flags, you will get both.
> If you want to override flags, you have to exclude them
> from inherit-flags.

Thank you, Steven !

> 
>> Any help to understand how I can do this would be appreciated.
>>
> 
> In Christ,
> Steven Watanabe