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From: Beman Dawes (bdawes_at_[hidden])
Date: 2005-12-17 09:46:15

"Neal Becker" <ndbecker2_at_[hidden]> wrote in message
> Neal Becker wrote:
>> Beman Dawes wrote:
>>> The directory iterator value type objects now caches status information.
>>> Performance is much better (6 times, in one test).
>>> This optimization is present for the Windows API, and for POSIX systems
>>> which support the BSD dirent::d_type extension. Currently this is
>>> detected by the __USE_BSD macro. Please report other macros which
>>> indicate it is safe to turn on this feature.
>>> IIRC, someone indicated that Linux also supports the feature, but
>>> perhaps only on later versions. If that is the case, what is the correct
>>> macros to be tested for what values?
> To be more precise: this is not a feature of Linux - it's a feature of the
> c
> lib. Linux systems ususally use glibc, but small embedded systems may use
> other clibs, such as ulibc. This is why lots of people gave up on "guess
> the macro" years ago and changed to some kind of autoconf. There are too
> many variables.

Yes, I can see the advantages of that approach.

Probably because I don't have any autoconf experience, I have trouble seeing
how we could make use of that approach for Boost.

Any ideas?


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