Acommon.h

#ifndef ACOMMON_H
#define ACOMMON_H

#include "BCommon.h"

#include "WorkingClass.h"
#include "BrokenClass.h"

#endif /* ACOMMON_H */

Bcommon.h

#ifndef BCOMMON_H
#define BCOMMON_H

namespace NamespaceB {
	class SuperClass {
	};
}

#endif /* BCOMMON_H */

BrokenClass.h

#ifndef BROKENCLASS_H
#define BROKENCLASS_H

namespace NamespaceA
{
    class BrokenClass : public NamespaceB::Superclass
    {
    public:

        BrokenClass();
        ~BrokenClass();
    };
}


#endif /* BROKENCLASS_H */

main.cpp

#include "WorkingClass.h"
#include "BrokenClass.h"

int main(int argc, char *argv[]) {
	NamespaceA::WorkingClass a;
	NamespaceA::BrokenClass b;
	return 0;
}

WorkingClass.h

#ifndef WORKINGCLASS_H
#define WORKINGCLASS_H

namespace NamespaceA
{
    class WorkingClass : public NamespaceB::SuperClass {
    public:
        WorkingClass();
        ~WorkingClass();
    };
}

#endif /* WORKINGCLASS_H */