Please use mail address "manabu....@gmail.com", not
"manabu....@gmailc.com" when following this thread.  I accidently made
a mistake when I posted the first mail in this thread.
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php
Japanese: http://www.sraoss.co.jp

> Tom Lane  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.
> -Kevin

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