CLIM mail archive



    Date: Thu, 28 Oct 1993 13:02 EDT
    From: Peter Karp <>

    I'd like to suggest that the CLIM vendors put some effort into
    establishing a more standard, more useful features list (i.e.,
    *features*) in the interest of facilitating portability among

    Obviously, :CLIM should be on the features list for all CLIM
    implementations.  It is version information that I want to address.
    I suggest that all vendors ensure that symbols naming both the major
    and minor version are on the features list, and that alpha/beta
    designations be encoded separately.

    For example, I suggest the following symbols be defined for the
    following releases:

    CLIM 1.1	   :CLIM     :CLIM-1	:CLIM-1.1
    CLIM 2.0 alpha	   :CLIM     :CLIM-2	:CLIM-2.0    :CLIM-2.0-alpha
    CLIM 2.1	   :CLIM     :CLIM-2    :CLIM-2.1

I am quite certain that CLIM 1.1 has :CLIM and :CLIM-1 and maybe even
:CLIM-1.1 on *FEATURES*.

The sysdcl for CLIM 2.0 pushed :CLIM, :CLIM-2, and :CLIM-2.0 onto
*FEATURES*.  There is no conditionalization for alpha/beta, etc, at
least not to my knowledge.

    My reasoning is that there will be certain systematic differences
    between all the CLIM 1.X versions and all the CLIM 2.X versions, and
    that we should be able to use #+CLIM-2 or #-CLIM-1 to designate such
    dependencies in our code once, for all time.  If I were to use
    #+CLIM-2.0, or #-CLLIM-1.1 my code would do the wrong thing when I
    tried to use it under CLIM-2.1 or CLIM-1.0.

    I would specifically request that vendors NOT include symbols for
    previous versions, e.g., a CLIM 2.0 implementation should not include
    :CLIM-1.1.  (I have seen this case occur, which is why I point this

I am pretty sure that it is the case that CLIM 2 does not have CLIM 1
features on *FEATURES*.

    This type of planning in the feature list will let us conditionalize
    code at a much more accurate level of granularity.  Code will be
    portable across different sites and different platforms.



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