Efficient DEBUG logging system with __FILE__ and fctprintf

src/mem/gdt/gdt.c

@@ -1,6 +1,7 @@
 #include "gdt.h"
 #include <stdint.h>
 #include "../../io/serial/serial.h"
+#include <kernel.h>
 
 // Descriptors are 8-byte wide (64bits)
 // So the selectors will be (in bytes): 0x0, 0x8, 0x10, 0x18, etc..
@@ -78,5 +79,5 @@ void gdt_init()
     gdt_load();
     gdt_flush();
 
-    serial_kputs("kernel: gdt: Initialized GDT!\n");
+    DEBUG("GDT initialized");
 }