C++: Multiple definition error for global functions in the header file

Question

This function is global and is defined in the header file (temporarily I want to keep it there).

The header file also constitutes a particular class which has i

Answer 1

mark it as inline:

 inline void globalfunc() { 
 }

although doing so means that it will no longer strictly be global - you will get a copy in each translation unit that uses the header, but the linker won't object to this.