error C2894: templates cannot be declared to have 'C' linkage

[sumit]

Dear friends
I am using fann for my ocr project (academic) .
I compiled the fann and its examples successfully in VC++6.
But when compiling my own application i am getting error

c:\program files\microsoft visual studio\vc98\include\math.h(514) : error
C2894: templates cannot be declared to have 'C' linkage

Then i tried to compile the xor_train.c after renaming it xor_train.cpp . I
got the same error.

Then i used c++ binding . I tried to compile xor_sample.cpp and i got same
error.

Please suggest a way . It would be nice if u keep it simple as i am not a
hardcore programmer .

Thanking you

[Vincenzo Di Massa]

The problem seems to be that the M$ version of math.h for C++ uses templates.
I guess somewhere (fann, your code) there is a piece of code think this one:

#ifdef __cplusplus
extern "C" {
#endif
...
#include <math.h>
...
#ifdef __cplusplus
}
#endif

Try moving the #include <math.h> outside of the extern "C" thing...
Or better, try to use a C version of math.h.

Regards
Vincenzo

Post by sumit
Dear friends
I am using fann for my ocr project (academic) .
I compiled the fann and its examples successfully in VC++6.
But when compiling my own application i am getting error
c:\program files\microsoft visual studio\vc98\include\math.h(514) : error
C2894: templates cannot be declared to have 'C' linkage
Then i tried to compile the xor_train.c after renaming it xor_train.cpp .
I got the same error.
Then i used c++ binding . I tried to compile xor_sample.cpp and i got same
error.
Please suggest a way . It would be nice if u keep it simple as i am not a
hardcore programmer .
Thanking you

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