Hello Jonathan,

JP > contained in this source file "codeit.c":
JP>   >
JP>   > short ReadPort(void){
JP>   > }
JP>   >
JP>   > 2029 unresolved external ReadPort() in Infinity.CPP
JP>   >
JP>   > Is it wrong for me to be using a C function OBJ with a C++ program?
JP> ZZ>
JP> 
JP>   Bingo !  You have compiled a C function, and it's thus been compiled
JP>   without name mangling.  You are then trying to call it from a C++
JP>   module, which has -- correctly -- mangled the name of the declaration
JP>   given in openport.h and compiled a call to that.

Very interesting. 
I have written external functions in C and added then to Guidelines
and had them compile and link with no problem. (about the only
Guidelines thing I haven't had a problem with :-)  )

JP>   Use an extern "C" wrapper for C functions, or switch to C++.

I certainly didn't do this.

Colin.

___
 X KWQ/2 1.2a X Pedestrians:  The quick and the dead.
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