Hi all, Thanks for all your answers. Here's the new proposed portion of the section 'Target Platforms'. Please reply if you think does it misrepresents the current situation!
As of 2016, the list of supported platforms is the following: * glibc systems. With glibc 2.15 or newer, they are frequently tested. About the kernels: * glibc on Linux is frequently tested. * glibc on kFreeBSD is rarely tested. * Mac OS X. In versions 10.11, it's occasionally tested. In version 10.5, it's rarely tested. * FreeBSD 9.1 or newer is occasionally tested. * OpenBSD 5.8 or newer is occasionally tested. * AIX 7.1 is occasionally tested. * Solaris 10 and 11 are occasionally tested. Solaris 9 and older are rarely tested and low priority. * Cygwin 2.6 is occasionally tested. Cygwin 1.7.x is rarely tested. * mingw is occasionally tested. But note that some modules are currently unsupported on mingw: 'mgetgroups', 'getugroups', 'idcache', 'userspec', 'openpty', 'login_tty', 'forkpty', 'pt_chown', 'grantpt', 'pty', 'savewd', 'mkancesdirs', 'mkdir-p', 'euidaccess', 'faccessat'. The versions of Windows that are supported are Windows XP and newer. Only the latest version of mingw is tested; older versions are not supported. * GNU Hurd 0.7 is rarely tested. * NetBSD 7.0 or newer is rarely tested. * Native Windows, with MSVC as compiler, is rarely tested and low priority. * musl libc is rarely tested. * Minix 3.3.0 is rarely tested. * HP-UX 11.31 is very rarely tested. * IRIX 6.5 is no longer tested. * OSF/1 5.1 is no longer tested. * Interix 6.1 is no longer tested, and requires the 'suacomp' library (<http://sourceforge.net/projects/suacomp/>) in version 0.6.8 or newer. * Haiku and BeOS are no longer tested. * uClibc on Linux is no longer tested. * QNX is no longer tested. Paul, since you say that HP-UX is still living on but none of us has access to a HP-UX machine, I wrote "HP-UX 11.31 is very rarely tested." I did not mention particular GNU/Linux distributions, because they don't differ much, because they evolve (merge, split, get renamed) rather quickly, and because I don't want to make propaganda for some of them but not for others. Bruno