OpenCV3.4 error: 'time' was not declared in this scope

1. Compilation environment Windows
2. Target Compilation Platform Windows
3. Compile tool Mingw5.3
4. Error file test_hdr.cpp
5. Error line 140 6. The reason for the error and the time function is undefined

srand(static_cast<unsigned>(time(0)));

quote in the header

#include <sys/time.h>

Just