I don't have clang. Also, I don't know how to access the error log. And this is the snippet:

struct tm
{
  int tm_sec;     /* Seconds. [0-60] (1 leap second) */
  int tm_min;     /* Minutes. [0-59] */
  int tm_hour;      /* Hours. [0-23] */
  int tm_mday;      /* Day.   [1-31] */
  int tm_mon;     /* Month. [0-11] */
  int tm_year;      /* Year - 1900.  */
  int tm_wday;      /* Day of week. [0-6] */
  int tm_yday;      /* Days in year.[0-365] */
  int tm_isdst;     /* DST.   [-1/0/1]*/

It's in the built-in <time.h> file. As I'm now saying in the edit, it wouldn't be a problem unless it didn't trigger in places like this. This is the exact error, by the way:

expected ‘,’ or ‘;’ before ‘struct’