OpenBSD 6.1 doesn't recognize MAP_STACK.
@@ -272,7 +272,7 @@ pkg sys =
const Mfixed : mopt = 0x10
const Mfile : mopt = 0x0
const Manon : mopt = 0x1000
- const Mstack : mopt = 0x4000
+ const Mstack : mopt = 0
const Mnoreplace : mopt = 0x0800
/* file types */
