I am using open source code for a modbus stack and when i compile it can't doesn't find the function discriptions. Header = mb.h and in the include directory theres a mb.c that has the function code. I included the header and when i call a function it recognizes theres a prototype but is says theres no discription. What am I doing wrong? Else where I read i need to create an object file for mb.c code, how do i do that? Also i am using free modbus stack, any other recomendations of free modbus stack code I may look into using?