clock_gettime
=============

POSIX specification:
 https://pubs.opengroup.org/onlinepubs/9699919799/functions/clock_gettime.html

Gnulib module: ---

Portability problems fixed by Gnulib:

Portability problems not fixed by Gnulib:

  * This function is missing on some platforms: Mac OS X 10.11, Minix 3.1.8, mingw, MSVC 14. The Gnulib module gettime is a partial substitute; it implements the CLOCK_REALTIME functionality of clock_gettime.