Home » Language IDEs » C / C++ IDE (CDT) » undefined reference to EXTERNC c++ function in C(undefined reference to EXTERNC c++ function in C)
| undefined reference to EXTERNC c++ function in C [message #1072891] |
Tue, 23 July 2013 18:23  |
 W Z
Messages: 2
Registered: July 2013 |
Junior Member |
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I have a EXTERNC c++ function prototype in a lcca.h file
EXTERNC int lccaReceive(lcca_ptr myLccaPtr, tHdb10Word* data,
UINT16 maxWords, UINT16 actualWords,
INT32 maxWaitMs, int bypassStats);
the definition of the function is in a lcca.cpp file
int lccaReceive(lcca_ptr myLccaPtr, tHdb10Word* data,
UINT16 maxWords, UINT16& actualWords,
INT32 maxWaitMs, int bypassStats){
Lcca* typedLccaPtr = static_cast<Lcca*>(myLccaPtr);
return typedLccaPtr->Receive(data, maxWords, actualWords,
maxWaitMs, !!bypassStats);
call the function in a lccaCall.c file , and lcca.h is included.
it errors out:
undefined reference to lccaReceive.
How to resolve it? Thanks for your help.
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| Re: undefined reference to EXTERNC c++ function in C [message #1072942 is a reply to message #1072891] |
Tue, 23 July 2013 20:09  |
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On 7/23/2013 12:24 PM, W Z wrote:
>
>
> I have a EXTERNC c++ function prototype in a lcca.h file
>
> EXTERNC int lccaReceive(lcca_ptr myLccaPtr, tHdb10Word* data,
> UINT16 maxWords, UINT16 actualWords,
> INT32 maxWaitMs, int bypassStats);
>
> the definition of the function is in a lcca.cpp file
>
> int lccaReceive(lcca_ptr myLccaPtr, tHdb10Word* data, UINT16 maxWords,
> UINT16& actualWords,
> INT32 maxWaitMs, int bypassStats){
> Lcca* typedLccaPtr = static_cast<Lcca*>(myLccaPtr);
> return typedLccaPtr->Receive(data, maxWords, actualWords,
> maxWaitMs, !!bypassStats);
>
> call the function in a lccaCall.c file , and lcca.h is included.
> it errors out:
>
> undefined reference to lccaReceive.
> How to resolve it? Thanks for your help.
This forum doesn't answer questions on C/C++. If you think it's an
Eclipse question, you could re-ask in the Eclipse CDT forum. More likely
though, it's failure to have lcca.h in a subdirectory that's the object
of -I on the compiler command line in your Makefile.
Best of luck.
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