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    SubjectRe: [kbuild-devel] [rfe] easier customization of kconfig for non-Linux projects
    Date
    Hello all!

    Sorry to jump into the discussion, but...

    On Thursday 24 May 2007 08:40, Sam Ravnborg wrote:
    > The intent with this is clear but the solution you suggest albeit simple
    > does not really match where we could end up with kconfig.
    > Recently Roman added support for options in the kconfig language
    > and I would assume we could deal with most of this just using options.
    >
    > One example could be to support options for the mainmenu entrye like this:
    >
    > mainmenu "Busybow config system"
    > option project="Busybox"
    > option version="$VERSION" <= Where '$' signify an environment variable

    I would rather suggest a kind of 'namespace' thing. This way, one could use
    the kconfig language for a project (eg. buildroot) and include sub-Kconfig
    files from other sub-projects (eg. kernel), thus making all configurable
    from the same menu.

    Something like (syntax proposal):

    ----8<----
    mainmenu "Buildroot config system"
    option prefix="" <= prefix to config options

    config foo => foo=y / # foo is not set
    blah blah blah...

    namespace "Buildroot options"
    option project="Buildroot"
    option version="${VERSION}" <= To avoid $VERSION_test ambiguity
    option prefix="BR2_" <= prefix to config options

    config bar => BR2_bar=y / # BR2_bar is not set
    blah blah blah...

    endnamespace

    namespace "Linux Kernel options"
    option project="Linux"
    option version="..."
    option prefix="CONFIG_"

    include "${BR2_KERNEL_DIR}/arch/${BR2_ARCH]/Kconfig"

    endnamespace
    ----8<----

    Then with a simple grep -E '^CONFIG_' one can easily extract the kernel
    options from the others.

    We _may_ need to support nested namespaces also, concatenating the prefixes.

    I once tried to do such thing, but I'm lacking good lex/yacc fu, and I
    miserably failed... :-(

    Comments?

    Regards,
    Yann E. MORIN.

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