5 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/functions/shmget.html}
9 Portability problems fixed by Gnulib:
13 Portability problems not fixed by Gnulib:
16 This function is missing on some platforms:
19 On many platforms (not Linux), SHMMAX is so small that it is unusable for
20 reasonable applications, and/or @code{shmget} requires superuser privileges.