On Fri, 2 Jan 2009, Luís Oliveira wrote:
On Fri, Jan 2, 2009 at 5:26 AM, Daniel Herring <dherr...@tentpost.com> wrote:
FFI is an optional clisp feature. Thus I propose adding it to CFFI's list
of dependencies.
[...]
+ :depends-on (alexandria trivial-features babel #+clisp ffi)
[...]
How about a #-ffi (error "CFFI requires a version of CLISP compiled
with the FFI module.") in src/cffi-clisp.lisp? Or something like that
in cffi.asd. What'd be the advantage of putting that in the ASD file?
I'm trying to write a tool to load a collection of ASDF packages, skipping
those which won't work on a given implementation/platform. With ffi in
the ASD defsystem, I can query asdf:component-depends-on before loading or
handle ASDF:MISSING-DEPENDENCY at load time.
An ad-hoc error requires me to know in advance not to load CFFI, but it
does provide a custom error message.
- Daniel
P.S. I think its an ASDF defect that there is no mechanism for separately
specifying dependencies on other packages, *features*, and arbitrary
predicate functions. With optional documentation for each._______________________________________________
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