[Geany] #include "Class.cpp"

[sqlpython]

Using Debian 7 and 6 with g++ 4.6

Geany is great but I notice when compiling the same code with
Netbeans 7.xx and C++ plugin
or
Eclipse Indigo 3.7 and C++ plugin

The main.cpp file in a project when built with Geany requires the 
Class.cpp files to be listed as
#include "Class.cpp"
along with the #include "Class.h" ..or the Build fails..
  Not so with other IDEs
WHY??
  I have tried this in several other Linux installs and the problem is 
same...
I believe that I should only have to list the Headers as the Class are 
linked in the Headers...No?
...Before anyone asks.."All source and headers are in the same Dir"
Thanks for any help..