MATLAB: Error LNK2019, 3 unresolved external symbols

ccompilererrorerror lnk2019mex

Hi, I'm new to Matlab. I'm trying to build a C mex file. The C file and header files are all on the search path. I've been able to build C mex files, following the documents, but I'm not sure what's wrong here. Here's the error message I'm getting:
Error using mex Creating library DynamicProgrammingQ2.lib and object DynamicProgrammingQ2.exp DynamicProgrammingQ2.obj : error LNK2019: unresolved external symbol dp_costs referenced in function mexFunction DynamicProgrammingQ2.obj : error LNK2019: unresolved external symbol dp_build_gamma referenced in function mexFunction DynamicProgrammingQ2.obj : error LNK2019: unresolved external symbol dp_all_indexes referenced in function mexFunction DynamicProgrammingQ2.mexw64 : fatal error LNK1120: 3 unresolved externals
Please point me in the right direction.

Best Answer

Matthew - if you have other C files that have the function bodies for those function prototypes/signatures of dp_grid.h, then you need to include them when you build your mex function. This is why you are observing the unresolved external symbol errors. Try rebuilding as
 mex T:\Matlab\SRVF_FDA\DynamicProgrammingQ2.c otherCFile.c
where otherCFile.c is the path to and the name of the C file that includes the missing function bodies.
Related Question