Re: [RFT] Remove three forks per _AC_RUN_LOG_STDERR

[Eric Blake]

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According to Paolo Bonzini on 11/6/2008 3:28 AM:
> In the most common case in which nothing is printed on stderr, we can
> avoid the grep, cat and rm to log things on AS_MESSAGE_LOG_FD.  Some
> juggling is needed so that conftest.err is provided even when the "if"
> condition is false, but even that will not add any fork in that case.

I like how it looks, even if it doesn't speed things up (but I suspect it
will).

> 
> Can anybody test this on Cygwin to see if it gives any interesting speedup?

It will be a while, but I've started my test run.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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