added configuration option for xml importer

[hemker]

I'm currently trying to build rock on Ubuntu 16.04 in master flavor. The default xml importer gccxml is not working with base/orogen/std. Due to a mailing list issue I added an autoproj configuration option.

[doudou]

Keyword argument syntax is key: value. :key => value only works as a backward compatibility feature.

[2maz]

What is wrong with using Autoproj's operating system detection for handling the default case, and conditionally activate gcc (14.04) or castxml (16.04)?

[doudou]

What is wrong with using Autoproj's operating system detection for handling the default case, and conditionally activate gcc (14.04) or castxml (16.04)?

Something almost equivalent, but closer to the actual problem (and therefore probably more explicit) would be to check for castxml's clang availability (it depends on a libclang-castxml osdep). It would allow to extend to other OSes easily (e.g. macosx) by making sure that libclang-castxml is available.

Unfortunately, it requires an autoproj 1/autoproj 2 specific tests, which would be on autoproj 2 (untested !)

Note: typelib setup is handled in orocos-toolchain, that's probably where this should be done.

os_resolver = 
    if Autoproj.manifest.respond_to?(:os_package_resolver) # v2
        Autoproj.manifest.os_package_resolver
    else
        Autoproj.manifest.osdeps
    end

if os_resolver.has?('libclang-castxml')
    # enable castxml
else
    # enable gccxml
end

An IMO better option would be to check whether gccxml is available from the osdeps