PATCH: Fix gdb compilation on Tru64 UNIX

[Tom Tromey]

>>>>> "Rainer" == Rainer Orth <ro@CeBiTec.Uni-Bielefeld.DE> writes:

Rainer> napms() is declared only if _XOPEN_SOURCE_EXTENDED is defined, which
Rainer> requires _XOPEN_SOURCE >= 420.

Rainer> 2010-01-18  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
Rainer> 	* gdb_curses.h [__osf__] (_XOPEN_SOURCE, _XOPEN_SOURCE_EXTENDED)
Rainer> 	Define.
Rainer> 	* solib-osf.c (osf_current_sos): Initialize tail.

The solib-osf.c change is ok.

I am not as sure about the gdb_curses.h change.  I don't think we have
many host tests like that.  Perhaps some kind of configury would be
better.

Tom