Use %include instead of extern for constants.asm

src/console.asm

@@ -1,9 +1,5 @@
-extern	EOS
+%include "src/constants.asm"
-extern	NL
+
-extern	NR_write
-extern	FD_stdin
-extern	FD_stdout
-extern	FD_stderr
 extern	strlen
 extern	itoa
 

src/core.asm

@@ -1,4 +1,4 @@
-extern	NR_exit
+%include "src/constants.asm"
 extern	strclr
 
 section	.text

src/file.asm

@@ -1,9 +1,4 @@
-extern	FD_stderr
+%include "src/constants.asm"
-extern	NR_read
-extern	NR_write
-extern	NR_open
-extern	NR_close
-
 extern	strlen
 
 section .rodata

src/tests.asm

@@ -1,6 +1,5 @@
-;constants.asm
+%include "src/constants.asm"
-extern	EOS
+
-extern	NL
 ;core.asm
 extern	min
 extern	minu