Circular dll build

Bar.cpp

#include <stdio.h>
#include "Foo.h"
#include "Baz.h"

#undef API
#define API __declspec(dllexport)
#include "Bar.h"

void Bar::Print() {
    printf("Bar\n");
}

void Bar::PrintDeps() {
    Foo::Print();
    Baz::Print();
}

Bar.h

#ifndef API
#define API __declspec(dllimport)
#endif

struct Bar {
    static void API Print();
    static void API PrintDeps();
};

Baz.cpp

#include <stdio.h>
#include "Foo.h"
#include "Bar.h"

#undef API
#define API __declspec(dllexport)
#include "Baz.h"

void Baz::Print() {
    printf("Baz\n");
}

void Baz::PrintDeps() {
    Foo::Print();
    Bar::Print();
}

Baz.h

#ifndef API
#define API __declspec(dllimport)
#endif

struct Baz {
    static void API Print();
    static void API PrintDeps();
};

Build.bat

REM cl * /c     generates .obj
REM lib * /DEF  generates .exp and dynamic export .libs
REM cl *        generates the .exe
REM cl * /LD    generates a .dll

cl Foo.cpp /c

cl Bar.cpp /c
lib Bar.obj /DEF

cl Baz.cpp /c
lib Baz.obj /DEF

cl Foo.obj Baz.lib Bar.lib

cl /LD Baz.obj Bar.lib Foo.lib
cl /LD Bar.obj Baz.lib Foo.lib

Foo.cpp

#include <stdio.h>
#include "Bar.h"
#include "Baz.h"

#undef API
#define API __declspec(dllexport)
#include "Foo.h"

void Foo::Print() {
    printf("Foo\n");
}

void Foo::PrintDeps() {
    Bar::Print();
    Baz::Print();
}

int main(int argc, char** argv) {
    Foo::PrintDeps();
    Bar::PrintDeps();
    Baz::PrintDeps();
}
<

Foo.h

#ifndef API
#define API __declspec(dllimport)
#endif

struct Foo {
    static void API Print();
    static void API PrintDeps();
};