" undefined reference to" g++ error

[ashjas]

Hello,

i am trying to compile a code(main.cpp) which uses a function that is declared in a header file that is within the directory where the main.cpp file resides so the header is included as
#include"abc.h"

that function's definition is inside abc.cpp that also resides in the directory of main.cpp i.e with abc.h

but still on usage of that function i get "undefined reference to" that function error....

How is this possible??

Please can anybody help me out with this.

Thanks

Best Regards

[weaknessforcats]

You don't say whether this is a compiler error or a linker error.

If it's a compiler error of undefined reference:
a) you are a calling a function that is not the header
b) you are calling a function that is in the header but the arguments don't match the prototype in the header.

If it's a linker error, then your abc.cpp was not part of your make file.

You might post the relevant header lines plus the call where you are getting the error. Include the definitions of the argument variables.