sys/select.h
============

POSIX specification:
 https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_select.h.html

Gnulib module: sys_select

Portability problems fixed by Gnulib:

  * This header file is missing on some platforms: HP-UX 11.11, NonStop Kernel, mingw, MSVC 14.

  * This header file is not self-contained on some platforms: it requires <sys/types.h> to be included first.

  * This header file is not self-contained---it requires <string.h> before FD_ZERO can be used---on some platforms: AIX 7.1, Solaris 11.4.

Portability problems not fixed by Gnulib: