build: add a "user" arch to allow the kernel to run as a program on the host machine

libc/string/memchr.c

@@ -1,10 +1,10 @@
 #include <stddef.h>
 
-const void *memchr(const void *ptr, int value, size_t num) {
+void *memchr(const void *ptr, int value, unsigned long num) {
     const unsigned char *buf = ptr;
     unsigned char val = value;
 
-    for (size_t i = 0; i < num; i++) {
+    for (unsigned long i = 0; i < num; i++) {
         if (buf[i] == val) {
             return (void *)(buf + i);
         }

libc/string/strcmp.c

@@ -8,7 +8,7 @@ int strcmp(const char *s1, const char *s2)
     return s1[i] - s2[i];
 }
 
-int strncmp(const char *s1, const char *s2, unsigned int n)
+int strncmp(const char *s1, const char *s2, unsigned long n)
 {
     for (; n > 0; s1++, s2++, --n)
         if (*s1 != *s2)

libc/string/strcpy.c

@@ -11,10 +11,10 @@ char *strcpy(char *output, const char *input)
     return output;
 }
 
-char *strncpy(char *output, const char *input, unsigned int count)
+char *strncpy(char *output, const char *input, unsigned long count)
 {
-    unsigned int size = count;
-    unsigned int i;
+    unsigned long size = count;
+    unsigned long i;
     for (i = 0; i < size; i++) {
         output[i] = input[i];