Syscalls for a simple C program

printvar.c

#include <stdio.h>

int main() {
  int x = 1;
  printf("value of x is %d\n", x);
  return 0;
}

strace_output.txt

value of x is 1
% time     seconds  usecs/call     calls    errors syscall
------ ----------- ----------- --------- --------- ----------------
  0.00    0.000000           0         1           read
  0.00    0.000000           0         1           write
  0.00    0.000000           0        10         8 open
  0.00    0.000000           0         2           close
  0.00    0.000000           0         8         7 stat
  0.00    0.000000           0         3           fstat
  0.00    0.000000           0         7           mmap
  0.00    0.000000           0         4           mprotect
  0.00    0.000000           0         1           munmap
  0.00    0.000000           0         1           brk
  0.00    0.000000           0         3         3 access
  0.00    0.000000           0         1           execve
  0.00    0.000000           0         1           arch_prctl
------ ----------- ----------- --------- --------- ----------------
100.00    0.000000                    43        18 total