内存缓存和ext4完整支持

third_party/lwext4_config/include/stdlib.h

@@ -0,0 +1,16 @@
+#ifndef ZEROOS_STDLIB_H_
+#define ZEROOS_STDLIB_H_
+
+#include <stddef.h>
+
+void *ext4_user_malloc(size_t size);
+void *ext4_user_calloc(size_t count, size_t size);
+void ext4_user_free(void *ptr);
+void qsort(
+    void *base,
+    size_t nmemb,
+    size_t size,
+    int (*compar)(const void *, const void *)
+);
+
+#endif