Nice-to-have fix for autogen.sh

[Xiaofan Chen]

On Thu, Feb 2, 2012 at 12:12 PM, Segher Boessenkool
<segher at kernel.crashing.org> wrote:
>>>> Except for the fact that configure is really slow, I'd agree with you.
>>>
>>>
>>> It doesn't take more than ten seconds on a really slow machine though,
>>> so it is almost bearable...
>>
>>
>> Actually, I'm well placed to know that configure is an order of magnitude
>> slower (I'm not kidding) if you're using MinGW or cygwin on Windows.
>
>
> On OSX it is ten times slower than on Linux already, but yes I remember
> builds on cygwin being ten times slower than on Linux (on Linux it was
> dominated by compiler time, on cygwin just by process startup).
>
> I thought it would have improved a bit by now, and I thought mingw would
> be better.  I also thought the generally much faster hardware we have
> these days would have made it all sort-of a non-issue.  "Almost bearable".
>

Speed-wise, Linux is always the fastest, OS X is not that bad in my
experiences -- slightly slower than Linux for my 2011 Mac Mini, but I
believe it is mainly because that I have not upgraded the RAM
from 2GB to 4GB. OS X Lion is 64bit so it really needs the RAM.

MinGW/MSys is really much better than Cygwin and I feel it is
"almost bearable". Cygwin is still hopelessly slow no matter how
fast is your machine. But for libusb/libusbx, it is still bearable
since it is small.

-- 
Xiaofan