--- a/Makefile
+++ b/Makefile
@@ -14,13 +14,14 @@ CC				=	gcc
 
 CFLAGS			=	-Wall -Wextra -Werror
 
-SRC 			=	../*.c \
+SRC 			=	\
 					ft_compare_results.c \
 					ft_mem_count.c \
 					ft_my_split.c \
 					ft_print.c \
 					ft_run_test.c \
 					main.c \
+					-L../libft -I../libft -lft
 
 AND				=	&&
 
--- a/ft.h
+++ b/ft.h
@@ -13,15 +13,24 @@
 #ifndef FT_H
 # define FT_H
 
+#include <ctype.h>
+
 //for MacOS, MALLOC_SIZE_FUNCTION Macro should be malloc_size 
 //for Windows, MALLOC_SIZE_FUNCTION Macro should be _msize 
 //for GLIBC systems, MALLOC_SIZE_FUNCTION Macro should be malloc_usable_size
+#ifdef __GNU_LIBRARY__
+#define MALLOC_SIZE_FUNCTION malloc_usable_size
+#else
 #define MALLOC_SIZE_FUNCTION malloc_size
+#endif
 
 //For Windows/GLIBC next #include should be "#include <malloc/malloc.h>" 
 //For MacOs next #include should be #include <malloc.h> 
+#ifdef __GNU_LIBRARY__
+#include <malloc.h>
+#else
 #include <malloc/malloc.h>
-
+#endif
 
 //Includes
 #include <stdio.h>