Help: where can I find the symbol "__pioinfo"

[ilovecad]

I'm modifying and enbedding Perl into my own program. However, there is a linking error said "unresolved external symbol ___pioinfo referenced in function ***".
The program has declared 'extern "C" __pioinfo' though.
I think '__pioinfo' should be a global variable provided by VC++, but I can't find it.
Anyone can tell me a way to solve the link problem?
Thank you very much!

 

[ArkM]

Make a project with standard VC++ settings (or see what RTL libs added in such projects). Your linkage has no C/C++ RTL references (for example, __pioinfo declared in RTL ioinit.obj module)...

 

[tpmoody]

ilovecad,

This may be a longshot but those of us that program a lot of instrumentation, would see that as a variable(or struct etc..)defined for a PIO card. Used for bit level parallel input output and may have been defined for a PC parallel port. I don't think it is provided by Microsoft, but I may be wrong.