Fix tui compilation with Solaris libcurses (PR tui/21482)

[Pedro Alves]

On 05/19/2017 02:26 PM, Rainer Orth wrote:
> Hi Eli,
> 
>>> I've checked in the cast part now.  Here's the NOMACROS part for
>>> gdb_curses.h.  Tested as before on sparcv9-sun-solaris2.10 (curses) and
>>> amd64-pc-solaris2.12 (ncurses).  Ok too?
>>
>> I think this should be guarded by some OS-specific macro, so as not to
>> affect other platforms, where the original problem doesn't exist.  (I
>> see 6 instances of these macros being tested in my ncurses headers,
>> and I'm not on Solaris.)  Who knows what new problems this could cause?
> 
> that's what I had done initially (via configure.ac for solaris2.* only),
> but Pedro suggested to do it unconditionally since some other targets
> (AIX notably) seem to be having the same problem.

Yes, and it's not host specific, but really curses-implementation
specific.  On the same host you may compile against different versions
of curses (BSD curses, ncurses, pdcurses, etc.).  I don't see any
benefit to complicate things when we have no evidence that telling
curses to avoid defining its symbols as macros causes problems.

Thanks,
Pedro Alves