🏗 Add xdelta3 dependency

src/errorAndExit.h

@@ -1 +1,3 @@
+#pragma once
+
 void errorAndExit();

src/parseArguments.h

@@ -1,3 +1,5 @@
+#pragma once
+
 #include <stdbool.h>
 
 struct arguments {

src/utils/min.h

@@ -1,3 +1,5 @@
+#pragma once
+
 //minimum of two integers
 #define min(a,b) \
   ({ __typeof__ (a) _a = (a); \

src/xdelta3.c

@@ -0,0 +1,8 @@
+//To fix compile errors with xdelta3
+#define SIZEOF_SIZE_T 4
+#define static_assert(e,m) /* do nothing */
+#define XD3_ENCODER 0
+typedef unsigned int usize_t;
+typedef unsigned long long xoff_t;
+
+#include "../lib/xdelta3/xdelta3.h"