Some refinements:

On 12.01.2006 20:20, I wrote:
> Hello Eddie,
> 
> there is Object>>cCode: or Object>>cCode:inSmalltalk:, see e.g.
>   RePlugin>>allocateByteArrayAndSetRcvrPCREPtrFromPCRE: aPCREPtr
> for an example. With these constructs you can inject arbitrary C code
> into the generated C code.

> In RePlugin>>declareCVarsIn:

You should look into the corresponding Category to see what you have to
do else.

> you can see how to declare a header file,
> there is the line
>   cg addHeaderFile:'"rePlugin.h"'.
> ; this header file is located in dir
>   SomeBaseDir/platforms/Cross/plugins/RePlugin/

> You could put the extern vars into a respective header file.

should be: You could put the *declarations* of the extern vars
(definitions being in some *.c file) into a respective header file.

Stephan

> 
> 
> Regards,
> Stephan
> 
> 
> On 12.01.2006 10:49, Eddie Cottongim wrote:
> 
>>Hi,
>>
>>I'm trying to write a plugin that will call some hand-coded c functions 
>>in another file. It also needs to share variables via 'extern' with this 
>>other file.
>>
>>So in my plugin(class side) I have something like:
>>
>>declareCVarsIn: aCCodeGenerator
>>aCCodeGenerator var: 'height' declareC: 'int height'.
>>aCCodeGenerator var: 'width' declareC: 'int width'
>>
>>This generates, in C,
>>static int height;
>>static int width;
>>
>>If I understand this right, the 'static' keeps me from also making these 
>>extern, and also prevents me from sharing the other way by using 
>>'extern' in the other file. I guess having lots of externs would clog up 
>>the namespace but for now I'd just like to get this to work.
>>
>>I see in the CCodeGenerator where the static is added, but I'm not sure 
>>what the proper way is to suppress this. Any hints?
>>
>>I am working in Squeak 3.7 (its the latest version for which I have 
>>managed to get VM generation going).
>>
>>Thanks,
>>Eddie
>>
>>
>>
> 
> 

-- 
Stephan Rudlof (sr at evolgo.de)
   "Genius doesn't work on an assembly line basis.
    You can't simply say, 'Today I will be brilliant.'"
    -- Kirk, "The Ultimate Computer", stardate 4731.3