[ 214/2913] Compiling IDL librpc/idl/winbind.idl /opt/src/samba-4.8.0/librpc/idl/winbind.idl:183: warning: [out] argument `validation' not a pointer /opt/src/samba-4.8.0/librpc/idl/winbind.idl:185: warning: [out] argument `authoritative' not a pointer /opt/src/samba-4.8.0/librpc/idl/winbind.idl:183: error: winbind_SamLogon: [out] argument 'validation' is not a pointer or array, skip client functions [ 215/2913] Compiling IDL source4/librpc/idl/irpc.idl
As this function is only used for IRPC, these warnings don't matter.