Compiler error-Possible IDE error“undefined reference to gettimeofday error”

问题

I am trying to use rand,srand and time to generate random(enough) numbers in C.I use DEVC++.I get the following error: [Linked Error]undefined reference to 'gettimeofday' error

Here is my code:

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>

static unsigned long next = 1;

    int myrand(void) {
next = next * 1103515245 + 12345;
return((unsigned)(next/65536) % 32768);
}

void mysrand(unsigned seed) {
next = seed;
}

struct  {
   long tv_sec;
   long tv_usec;
       }timeval ;

int main(){


int num=0;               //random number

struct timeval t1;  


gettimeofday(&t1, NULL);
srand(t1.tv_usec * t1.tv_sec);

arg_num=rand();

printf("Number of arguments is:%d\n",arg_num);

}

Making an online research i found out that DEVC++ (somehow) includes GNU compiler but it doesn't really use it and that results in not identifying all "common" functions. Beyond solving the linked error, i would like to know if there is an IDE for C programming in Windows that uses GNU or that will not making such problems..

回答1:

There is no gettimeofday() provided by Windows.

来源：https://stackoverflow.com/questions/13894732/compiler-error-possible-ide-errorundefined-reference-to-gettimeofday-error