040000 tree 16cc91503d60b886ff535a66a512924e5f9e544c	aix
040000 tree d3902138814f1e02d2d19f8dea46d20fe1160029	bsd
040000 tree 592adb9aa79809955437cbee347a58f6c20a702e	linux
040000 tree cad1b0a16b15f6ff619cb3bb61b2b6c17b1f25ea	posix
040000 tree 2e6e7d4a99fd35c5cf0482d556a9efbcafb48af4	solaris
040000 tree 91bfebcb13aa837be657060c181ab221c33e01f5	windows