[nas] error compiling on cygwin

[mbuch at IFF572.IFF.KFA-JUELICH.DE]

Trying to complile nas on a recent cygwin system i get the
following errormessages:

Alibint.c: In function `_AuWaitForWritable':
Alibint.c:225: `FIONREAD' undeclared (first use in this function)
Alibint.c:225: (Each undeclared identifier is reported only once
Alibint.c:225: for each function it appears in.)
Alibint.c: In function `_AuEventsQueued':
Alibint.c:381: `FIONREAD' undeclared (first use in this function)
Alibint.c: In function `_AuReadEvents':
Alibint.c:463: `FIONREAD' undeclared (first use in this function)
Alibint.c: In function `_SysErrorMsg':
Alibint.c:1351: conflicting types for `sys_errlist'
/usr/include/sys/errno.h:23: previous declaration of `sys_errlist'

I have searched the include files and there doesnt seem to be a FIONREAD
declared on cygwin. Does anyone know how to fix this ?

best regards 		Matthias

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