I should add the actual mir_* source files :).

src/mir_window.c

@@ -0,0 +1,107 @@
+#include "internal.h"
+
+//////////////////////////////////////////////////////////////////////////
+//////                       GLFW platform API                      //////
+//////////////////////////////////////////////////////////////////////////
+
+int _glfwPlatformCreateWindow(_GLFWwindow* window,
+                              const _GLFWwndconfig* wndconfig,
+                              const _GLFWctxconfig* ctxconfig,
+                              const _GLFWfbconfig* fbconfig)
+{
+  return 0;
+}
+
+void _glfwPlatformDestroyWindow(_GLFWwindow* window)
+{
+}
+
+void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title)
+{
+}
+
+void _glfwPlatformSetWindowPos(_GLFWwindow* window, int xpos, int ypos)
+{
+}
+
+void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height)
+{
+}
+
+void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height)
+{
+}
+
+void _glfwPlatformIconifyWindow(_GLFWwindow* window)
+{
+}
+
+void _glfwPlatformRestoreWindow(_GLFWwindow* window)
+{
+}
+
+void _glfwPlatformHideWindow(_GLFWwindow* window)
+{
+}
+
+void _glfwPlatformPollEvents(void)
+{
+}
+
+void _glfwPlatformWaitEvents(void)
+{
+}
+
+void _glfwPlatformPostEmptyEvent(void)
+{
+}
+
+void _glfwPlatformGetFramebufferSize(_GLFWwindow* window, int* width, int* height)
+{
+}
+
+void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window, int* left, int* top, int* right, int* bottom)
+{
+}
+
+void _glfwPlatformShowWindow(_GLFWwindow* window)
+{
+}
+
+void _glfwPlatformUnhideWindow(_GLFWwindow* window)
+{
+}
+
+void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos)
+{
+}
+
+int _glfwPlatformCreateCursor(_GLFWcursor* cursor, const GLFWimage* image, int xhot, int yhot)
+{
+  return 0;
+}
+
+void _glfwPlatformDestroyCursor(_GLFWcursor* cursor)
+{
+}
+
+void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor)
+{
+}
+
+void _glfwPlatformSetCursorPos(_GLFWwindow* window, double xpos, double ypos)
+{
+}
+
+void _glfwPlatformApplyCursorMode(_GLFWwindow* window)
+{
+}
+
+void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
+{
+}
+
+const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
+{
+  return NULL;
+}