sqlite数据库读写实现

系统堆修改为axi内存区域

rt-thread/components/libc/compilers/common/include/sys/time.h

@@ -16,6 +16,12 @@
 #include <sys/types.h>
 #include <stdint.h>
 #include <time.h>
+
+typedef _TIME_T_    time_t;
+typedef long             suseconds_t;   /* microseconds. */
+typedef unsigned long    useconds_t;    /* microseconds (unsigned) */
+typedef __clockid_t          clockid_t;
+
 #ifdef _WIN32
 typedef __time64_t time_t;
 #endif /* _WIN32 */