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Date: Mon, 16 Jul 2012 04:01:34 -0500
From: "Yaakov (Cygwin/X)" <yselkowitz AT users DOT sourceforge DOT net>
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Subject: Re: compiling coreutils with cygport
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On 2012-07-13 17:03, Eric Blake wrote:
> Actually, coreutils tries to use all the *_unlocked variants of stdio,
> since those have better speed in single-threaded programs (all but sort
> are single-threaded, and sort skips stdio).  I do know that cygwin has
> putchar_unlocked, but does not have quite as many *_unlocked variants as
> Linux, so it may be a case where the configure logic to detect _unlocked
> functions went wrong and cygwin ends up using putchar instead of
> putchar_unlocked as a result.  I'll have to look into it more.

Currently we have the four required by POSIX: getc_unlocked, 
getchar_unlocked, putc_unlocked, and putchar_unlocked.  A little while 
ago I was working on the others which are available in Linux, as gcc 
will use them if available, but they didn't seem to make much difference 
to gcc's performance.  I still have that work locally, so if these would 
be useful, I could try to finish them up.


Yaakov

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