macOS Error : Dereferencing pointer to incomplete type

mkristain said:

this error occurred here

Code:

struct tm		*tm_p;
      tm_p = localtime(&current_file->stat.st_mtime);

      snprintf(datestr, sizeof(datestr),"%2d-%s-%4d %02d:%02d",
	  tm_p->tm_mday, monstr[tm_p->tm_mon], 
	  1900 + tm_p->tm_year, tm_p->tm_hour,
	  tm_p->tm_min);

please help me to resolve this.

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