[Bug c++/39513] New: class defined in file scope got linked by other files

["jengliang at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

This happens when one class is defined in header file, the other defined in cpp
file, have the same name.  The program behavior becomes gcc argument order
dependent.  At any rate, class A defined in foo.cpp has file scope shouldn't be
seen in bar.cpp.

$ g++ main.cpp foo.cpp bar.cpp
$ ./a.out
foo.cpp: A::A()
foo.cpp: A::~A()
foo.cpp: A::A()
foo.cpp: A::~A()

$ g++ main.cpp bar.cpp foo.cpp
$ ./a.out
bar.h: A::A()
bar.h: A::~A()
bar.h: A::A()
bar.h: A::~A()


-- main.cpp --
#include <iostream>

#include "foo.h"
#include "bar.h"

int main()
{
    foo f;
    bar b;

    return 1;
}

-- foo.h --
class foo {
  public:
    foo();
};

-- foo.cpp --
#include "foo.h"
#include <iostream>

class A {
  public:
    A() { std::cout << "foo.cpp: A::A()" << std::endl; }
    ~A() { std::cout << "foo.cpp: A::~A()" << std::endl; }
};

foo::foo()
{
    A * a = new A();
    delete a;
}

-- bar.h --
#include <iostream>

class A {
  public:
    A() { std::cout << "bar.h: A::A()" << std::endl; }
    ~A() { std::cout << "bar.h: A::~A()" << std::endl; }
};

class bar {
  public:
    bar();
};

-- bar.cpp --
#include "bar.h"
#include <iostream>

bar::bar()
{
  A *a = new A();
  delete a;
}


-- 
           Summary: class defined in file scope got linked by other files
           Product: gcc
           Version: 4.2.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jengliang at gmail dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39513