Thread: access functions from another c file

Hello, I have this problem. I have to create my own malloc file. I have made a header<.H file> that holds the function names of all my functions. I am calling this malloc from another file.

I cannot compile that malloc file alone, because malloc requires data such sizeof etc....

But when I am compiling my program (other than malloc). I get this error.

Code:

Undefined                       first referenced
 symbol                             in file
my_malloc                           /var/tmp//ccKI1S6Y.o
ld: fatal: Symbol referencing errors. No output written to a.out
collect2: ld returned 1 exit status

What would be the way around this?