CLOCK_REALTIME Is Undefined In Visual Studio But Can Run in Linux Target

Question

Question:

Aside from just adding the error to the ignore list in Visual Studio, is there a way to get Visual Studio to recognize POSIX-related functions?

Visual Studio Version: Community 2022 (64-bit) v17.12.3

Workload: Linux development with C++

Code Snippet:

#include <stdio.h>
#include <time.h>
int main()
{
    struct timespec ts;
    double time;
    
    clock_gettime(CLOCK_REALTIME, &ts);
    time = ts.tv_sec + (ts.tv_nsec / 1e9);
    printf("Time:%f\n", time);
    return 0;
}

Error Code:

Linux Terminal Result:

pi@bpi-iot-ros-ai:~/projects/ConsoleApplication1$ ./main
Time:1736924024.770033

Troubleshooting Steps That Taken By Myself:

I tried to Update but the error persisted.

Answer 1

The issue is resolved by insert #define _POSIX_C_SOURCE 199309L.

Reference: https://developercommunity.visualstudio.com/t/CLOCK_REALTIME-Is-Undefined-In-Visual-St/10843559

Answer 2

The issue is resolved by adding #define _POSIX_C_SOURCE 199309L.

Reference: https://developercommunity.visualstudio.com/t/CLOCK_REALTIME-Is-Undefined-In-Visual-St/10843559