GLTFImporter: exclude headers from build whem no_glft_importer is

defined.

code/glTFAsset.h

@@ -46,8 +46,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *   KHR_binary_glTF: full
  *   KHR_materials_common: full
  */
-#ifndef glTFAsset_H_INC
-#define glTFAsset_H_INC
+#ifndef GLTFASSET_H_INC
+#define GLTFASSET_H_INC
+
+#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
 
 #include <map>
 #include <string>
@@ -1187,4 +1189,6 @@ namespace glTF
 // Include the implementation of the methods
 #include "glTFAsset.inl"
 
-#endif
+#endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
+
+#endif // GLTFASSET_H_INC

code/glTFAssetWriter.h

@@ -46,8 +46,10 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  *   KHR_binary_glTF: full
  *   KHR_materials_common: full
  */
-#ifndef glTFAssetWriter_H_INC
-#define glTFAssetWriter_H_INC
+#ifndef GLTFASSETWRITER_H_INC
+#define GLTFASSETWRITER_H_INC
+
+#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
 
 #include "glTFAsset.h"
 
@@ -88,4 +90,6 @@ public:
 // Include the implementation of the methods
 #include "glTFAssetWriter.inl"
 
-#endif
+#endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
+
+#endif // GLTFASSETWRITER_H_INC

code/glTFExporter.h

@@ -45,6 +45,8 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #ifndef AI_GLTFEXPORTER_H_INC
 #define AI_GLTFEXPORTER_H_INC
 
+#ifndef ASSIMP_BUILD_NO_GLTF_IMPORTER
+
 #include <assimp/types.h>
 #include <assimp/material.h>
 
@@ -111,4 +113,6 @@ namespace Assimp
 
 }
 
-#endif
+#endif // ASSIMP_BUILD_NO_GLTF_IMPORTER
+
+#endif // AI_GLTFEXPORTER_H_INC