-int glutStrokeWidth( void* font, int character ) {}
-int glutBitmapLength( void* font, const unsigned char* string ) {}
-int glutStrokeLength( void* font, const unsigned char* string ) {}
+int glutStrokeWidth( void* font, int character ) { return 0; }
+GLfloat glutStrokeWidthf( void* font, int character ) { return 0.0f; }
+int glutBitmapLength( void* font, const unsigned char* string ) { return 0; }
+int glutStrokeLength( void* font, const unsigned char* string ) { return 0; }
+GLfloat glutStrokeLengthf( void* font, const unsigned char *string ) { return 0.0f; }