Re: V8.0rc1 On AIX.
От | Travis P |
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Тема | Re: V8.0rc1 On AIX. |
Дата | |
Msg-id | 0311AB9C-4E25-11D9-8DF3-003065F9DAF8@castle.fastmail.fm обсуждение исходный текст |
Ответ на | Re: V8.0rc1 On AIX. (Bruce Momjian <pgman@candle.pha.pa.us>) |
Ответы |
Re: V8.0rc1 On AIX.
(Bruce Momjian <pgman@candle.pha.pa.us>)
|
Список | pgsql-hackers |
On Dec 14, 2004, at 12:51 PM, Bruce Momjian wrote: > Peter Eisentraut wrote: >> Bruce Momjian wrote: >>> Huh, isn't this port testing? Do we not want to fix port bugs at >>> this stage? >> >> We are not really fixing anything, because it was never expected to >> work >> before. We are adding new functionality. It is, of course, a >> borderline case. But for example, do we have any information about >> whether what is being implemented actually works? I don't want to >> find >> out in two weeks, that yes, we managed to compile with thread support, >> but no, threaded applications still have issues on that platform. > > I assume threads are supposed to work on all platforms that support it. > We have new threading detection code in 8.0 so I expected some > adjustments. Also, someone pointed out that the problem was reported > during beta but I missed it. > > As far as testing we have to have the users do any testing. The thread > testing script already tests threading but the actual compile success > is > what we are adjusting now. And that failure was, as I understand it, to accommodate using /usr/bin/cc because as I mentioned in my port report on an AIX 5.1 system, /usr/bin/cc_r already works as-is. I believe that cc_r just adds -DTHREAD_SAFETY, adds -lpthead, sets a LIBPATH such that /usr/lib/threads preceeds /usr/lib/ so you pick up a thread-safe libc.a (which you don't even necessarily need unless you are assuming some libc functions are thread-safe -- if you are doing higher-level sync yourself, then that might not even be necessary), and cc_r does whatever other default defines, etc are best for a safe multithreaded compilation. As I recall, it used to just be a shell-script wrapper in AIX 4 days. Now, on my AIX 5.1 system, /usr/bin/ cc and cc_r are both just symlinks back to /usr/vac/bin/xlc. The different program names just invoke the different settings. Brad: can you make such a symlink and compile with that?, for example: /home/u/brad/cc_r -> /usr/bin/xlc ./configure CC=/home/u/brad/cc_r .... Certainly, pthreads do generally work on AIX. I've been using them for years. However, I always use cc_r (or xlC_r) for multithreaded apps. Peter has a point that the patch makes it compile, but does it make all necessary adjustments such that everything will always work? I can't answer that. -Travis
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