I see, thanks.
I tried to add the declaration on top of my C code and got the following warning:
THNN_Floatim2col' has internal linkage but is not defined
If I removed the declaration I got:
implicit declaration of function 'THNN_Floatim2col' is invalid in C99
I will continue to check if it is possible to get the header files that defines THNN_Floatim2col.
Thanks for you help.
Best
Z