getloadavg ¶LSB specification:
https://refspecs.linuxbase.org/LSB_5.0.0/LSB-Core-generic/LSB-Core-generic/baselib-getloadavg-3.html
Documentation:
Portability problems fixed by Gnulib:
<sys/loadavg.h>, not <stdlib.h>,
on some platforms:
Solaris 11.4.
Portability problems not fixed by Gnulib: