Re: spinlocks on HP-UX

On Thu, Dec 29, 2011 at 11:37:22AM +0900, Manabu Ori wrote:
> > > a configure test only proves whether the build machine can deal
> > > with the flag, not whether the machine the executables will
> > > ultimately run on knows what the flag means.  We cannot assume that
> > > the build and execution boxes are the same.  (In general,
> > > AC_TRY_RUN tests are best avoided because of this.)
> >
> > I understand why that is important in general, but as a shop which
> > builds from source, and is fine with a separate build for each
> > hardware model / OS version combination, it would be great if any
> > optimizations which are only available if you *do* assume that the
> > build machine and the run machine are the same (or at lease
> > identical) could be enabled with some configure switch.  Maybe
> > something like --enable-platform-specific-optimizations.
> >
> > I don't know if any such possible optimizations currently exist, I'm
> > just saying that if any are identified, it would be nice to have the
> > option of using them.
> 
> I can't say the right way to go for now, but I'd like binary
> packages could enjoy the effect of my patch as far as possible so
> that I made lwarx hint test run in configure runtime.

Was there any conclusion to this discussion?

--  Bruce Momjian  <bruce@momjian.us>        http://momjian.us EnterpriseDB
http://enterprisedb.com
 + It's impossible for everything to be true. +