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Possible Duplicate:
Static variables in C++
// x.h
int i = 3;
// x1.cpp
#include"x.h"
//...
// x2.cpp
#include"x.h"
//...
Above code will give linker error. However If I declare,
//x.h
static int i = 3;
It doesn’t give linker error in gcc, even we have the same #include! Are we creating different static int i; for every .cpp file ? Will it cause any silent linking bug (due to same name)?
Yes
No. Due to static, they have different names.
If this isn’t the behavior you want, you need to use
externin the header file, and allocate the variable in one translation unit (.cppfile)