On 10/15/10 Oct 15 -11:57 AM, Nikodemus Siivola wrote:
> On 15 October 2010 19:49, Robert Goldman <[email protected]> wrote:
>
>>> Ok, I'll put this on my TODO: I think :DEPENDS-ON ((:FEATURES ...))
>>> would be a nice way to indicate that something is eg. only meant for
>>> SBCL on Linux, or whatever.
>>
>> I'm going a little by memory, but IIRC the officially approved way of
>> doing this in ASDF is very cumbersome.
>>
>> You indicate a features-based dependency and then you have to set up an
>> error-handler (well, effectively an error handler), using
>> :if-component-dep-fails to say "and if this dependency fails, ignore it."
>
> I've done this, and it works fine -- from eg. SB-CGA:
>
> (:module "ports"
> :if-component-dep-fails :try-next
> :components ((:file "sbcl" :in-order-to ((compile-op
> (feature :sbcl))))
> (:file "ccl" :in-order-to ((compile-op
> (feature :ccl))))))
>
> The :DEPENDS-ON for the whole system in this case is intended for
> system introspection for things like Quicklisp -- or that's my idea at
> least.
>
> Cheers,
>
> -- Nikodemus
Right. But, honestly, I find
(:module "ports"
:components
(
#+sbcl
(:file "sbcl")
#+ccl
(:file "ccl"))
...)
a lot easier to read...
best
r
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