GCC 4.5 compatibility: no forward declarations for enums.

src/AbstractFramebuffer.h

@@ -35,6 +35,7 @@
 #include "OpenGL.h"
 
 #ifdef CORRADE_GCC45_COMPATIBILITY
+#include "Buffer.h"
 #include "ImageFormat.h"
 #endif
 

src/AbstractTexture.h

@@ -33,6 +33,7 @@
 #include "Sampler.h"
 
 #ifdef CORRADE_GCC45_COMPATIBILITY
+#include "Buffer.h"
 #include "ImageFormat.h"
 #include "TextureFormat.h"
 #endif

src/Magnum.h

@@ -527,7 +527,9 @@ template<class T> class Array1D;
 template<class T> class Array2D;
 template<class T> class Array3D;
 
+#ifndef CORRADE_GCC45_COMPATIBILITY
 enum class BufferUsage: GLenum;
+#endif
 class Buffer;
 
 #ifndef MAGNUM_TARGET_GLES2

src/MeshTools/CompressIndices.h

@@ -32,6 +32,10 @@
 
 #include "Mesh.h"
 
+#ifdef CORRADE_GCC45_COMPATIBILITY
+#include "Buffer.h"
+#endif
+
 #include "magnumMeshToolsVisibility.h"
 
 namespace Magnum { namespace MeshTools {