Re: avoid spurious failures from MacOS readdir bug

[Paolo Bonzini]

Eric Blake wrote:
> According to Eric Blake on 12/2/2008 6:03 PM:
>> $ grep AC_STATE_SAVE\( tests/testsuite | wc -l
>> 591
> 
>> Of which, many instances are inside generated configure.ac files where the
>> testsuite then runs the configure script multiple times.  So shaving a
>> process here shaves more than 1000 forks off the total testsuite time,
>> with a noticeable impact on cygwin.
> 
> I went ahead and applied the patch, after further testing that Solaris and
> BSD sed behaved correctly.

Indeed, they shouldn't have problems because their line length limit is
~4000 (giving a maximum length of ~2000 bytes for files in the
directory, which is safe).  However, note that the script is emulating
uniq, not sort -u.  I don't know if this is safe?

Paolo