C++: Switching from MSVC to G++: Global Variables
- by feed the fire
I recently switched to Linux and wanted to compile my Visual Studio 2010 C++ source code, which uses only the STL, on G++.
My Linux machine currently isn't available but I can try to tell you what is going on, first:
As I try to compile my project, all global variables I use in main and which perfectly work on MSVC result in myGlobalVar is not defined in this scope errors.
My project is built nearly the same as the example below:
// myclass.h
class myClass
{
// ....
};
extern myClass globalInstance;
// myclass.cpp
#include "myclass.h"
// myClass functions located here
myClass globalInstance;
// main.cpp
#include "myclass.h"
int main( )
{
// Accessing globalInstance results in an error: Not defined in this scope
}
What am I doing wrong?
Where are the differences between G++ and MSVC in terms of global variables?
