Slighly changed everything :)

- Makefile changes
- Linker script updates
- Made it comply with C17
- Removed entry.asm (finally)

src/calc.c

@@ -1,8 +1,9 @@
 #include <stdio.h>
+#include <stdlib.h>
 
+__attribute__ ((section("entry")))
 void main() {
-    char msg[8] = { 'H','e','l','l','o','!','\n',0 };
-    print(msg);
+    print("Hello, World!\n");
 
     return;
 }