2 @section @file{sys/types.h}
4 POSIX specification:@* @url{http://www.opengroup.org/onlinepubs/9699919799/basedefs/sys_types.h.html}
8 Portability problems fixed by Gnulib:
12 Portability problems not fixed by Gnulib:
15 The type @code{pid_t} is not defined on some platforms:
17 You can use the macro @code{AC_TYPE_PID_T} to fix this.