c++11 get current time with microsecond precision

I know how to get current time with microsecond precision under linux using gettimeofday(). However it's not portable and does not work on MinGW. How to get the same functionality with C++11?

#include <sys/time.h>
#include <cstdio>

int main(){
    timeval curTime;
    gettimeofday(&curTime, NULL);

    unsigned long micro = curTime.tv_usec;
    printf("micro is: %lu\n", micro);

    char buffer [30];
    //localtime is not thread safe
    strftime(buffer, sizeof(buffer), "%Y-%m-%d %H:%M:%S", localtime((const time_t*)&curTime.tv_sec));
    printf("buffer is: %s\n", buffer);

    char currentTime2[30] = "";
    sprintf(currentTime2, "%s.%06Lu", buffer, micro); 
    printf("currenttime is: %s\n", currentTime2);
}

it's fine in Linux and does not print buffer under MinGW. What is wrong here?