Compiler Error C2373

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'identifier' : redefinition; different type modifiers

The identifier is already defined with a different type modifier.

The following sample generates C2373:

// C2373.h
void __clrcall func( void );
const int i = 20;

And then:

// C2373.cpp
// compile with: /c
#include "C2373.h"
extern void __cdecl func( void );   // C2373
extern void __clrcall func( void );   // OK

extern int i;   // C2373
extern const int i;   // OK