Re: GraphicsMagick-1.3.23/TclMagick make errorq

On 2/12/16 12:51 PM, Bob Friesenhahn wrote:
> On Fri, 12 Feb 2016, Benjamin Brink wrote:
>>>
>>> There are likely not many users of TclMagick but we would like to
>>> continue to support and improve it.  Please let us know about anything
>>> which needs to be fixed.
>>
>> Certainly.  It seems to me, many tcl users and subsequently TclMagick
>> users, are very competent and mostly quiet about its use --because it
>> provides a strategic advantage in various hidden or vertical apps.
>
> That is a nice way to think about it. :-)
>
> I was a big Tcl user in the early '90s but since then I have mostly
> forgotten its simple syntax.
>
>>> A volunteer (with some knowledge of C code and Tcl extensions) is
>>> needed to help figure out the interfacing between TkMagick and
>>> TclMagick so that TkMagick works on Linux again.  We just need a
>>> reliable way to pass a single pointer, such as by having TkMagick call
>>> a public interface in TclMagick.
>>>
>>
>> Is there a bug report (url) associated with this?
>
> No.  It is only in my brain.
>
> The problem is immediately discovered if one attempts to run a
> TkMagick script on an OS which hides symbols from previously loaded
> modules by default.  The current design expects that a symbol needed
> by TkMagick will be resolved from a global TclMagick symbol, based on
> the TclMagick module being previously loaded.
>
> I am sure that there must be a recommended way for Tcl C modules to
> share pointers/data at the C level.
>

I'm sure there must be.  Sounds like something for the Tcl community to 
answer: http://tcl.tk/community/  As a last result, I'd imagine info is 
available via global resource variables at the tcl level.

cheers,
Benjamin

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