pch migration to modules [wip]

global_include/interfaces/IMaterial.cppm

@@ -1,10 +1,15 @@
-#pragma once
-
-#include <glm/glm.hpp>
+module;
 #include <string>
 #include <optional>
+#include "global_include/interfaces/ITexture_macros.h"
+
+export module eu07.global_include.interfaces.imaterial;
+import eu07.glm;
+import eu07.global_include.interfaces.itexture;
+
+export {
+
 
-#include "ITexture.h"
 
 struct IMaterial
 {
@@ -57,4 +62,5 @@ struct IMaterial
 		} null_material{};
 		return &null_material;
 	}
-};
+};
+}  // export

global_include/interfaces/ITexture.cppm

@@ -1,8 +1,15 @@
-#pragma once
+module;
+#include "global_include/interfaces/ITexture_macros.h"
+#include <cstddef>
+#include <cstdint>
+#include <string_view>
+
+export module eu07.global_include.interfaces.itexture;
+
+export {
 
 typedef int texture_handle;
 
-#define null_handle (0)
 
 struct ITexture
 {
@@ -73,4 +80,5 @@ struct ITexture
 		} null_texture{};
 		return &null_texture;
 	}
-};
+};
+}  // export

global_include/interfaces/ITexture_macros.h

@@ -0,0 +1,8 @@
+#pragma once
+
+// Macros cannot cross a module boundary, so they live in a plain header
+// that consumers pull into their global module fragment. The bodies are
+// expanded at the use site, where the imported names are in scope, so this
+// header deliberately includes nothing.
+
+#define null_handle (0)