Remove reliance on system stdint.h header

arch/aarch64.c

@@ -1,5 +1,5 @@
 #if defined(__aarch64__)
-#include <stdint.h>
+#include "../int.h"
 
 void exit(int8_t status){
   asm ( "mov x0, %0\n"        // Move the exit status into register x0

arch/mips.c

@@ -1,5 +1,5 @@
 #if defined(__mips__)
-#include <stdint.h>
+#include "../int.h"
 
 void exit(int8_t status){
   asm ( 

arch/x86_64.c

@@ -1,5 +1,5 @@
-#include <stdint.h>
 #if defined(__x86_64__)
+#include "../int.h"
 
 #define SYS_EXIT 60
 void exit(int8_t status) {

buildtest.c

@@ -1,4 +1,4 @@
-#include <stdint.h>
+#include "int.h"
 #include "sys.h"
 
 

int.h

@@ -0,0 +1,23 @@
+#if defined(__x86_64__) || defined(__aarch64__)
+#define __WORDSIZE 64
+#elif defined(__mips__)
+#define __WORDSIZE 32
+#endif
+
+typedef unsigned char   uint8_t;
+typedef unsigned short  uint16_t;
+typedef unsigned int    uint32_t;
+typedef unsigned long   uint64_t;
+
+typedef char   int8_t;
+typedef short  int16_t;
+typedef int    int32_t;
+typedef long   int64_t;
+
+#if __WORDSIZE == 64
+typedef long          intptr_t;
+typedef unsigned long uintptr_t;
+#elif __WORDSIZE == 32
+typedef int          intptr_t;
+typedef unsigned int uintptr_t;
+#endif

sys.h

@@ -1,5 +1,5 @@
 #ifndef MINIMALSYS_H
-#include <stdint.h>
+#include "int.h"
 
 void exit(int8_t status);