Fix build

src/fs_posix.c

@@ -185,11 +185,8 @@ static size_t p_seek(void *fp, size_t offset) {
 #endif
   return (size_t) ftell((FILE *) fp);
 }
+
 #else
-static char *p_realpath(const char *path, char *resolved_path) {
-  (void) path, (void) resolved_path;
-  return NULL;
-}
 
 static int p_stat(const char *path, size_t *size, time_t *mtime) {
   (void) path, (void) size, (void) mtime;