[Nauty] version 2.7rc5 of nauty&Traces available

[Brendan McKay]

Yet another release candidate for nauty&Traces version 2.7 is available: 
nauty27rc5.

This version:

* A bug in nauty.h caused compilation failure on some hardware without 
popcnt instructions. You didn't encounter this if you didn't get 
compile-time error messages about the macro POPCOUNT. Thanks to Anthony 
Matos for reporting this error.

* Tweak the configure script to more reliably detect standard function 
declarations and to improve the test for the POPCNT instruction.

* The maximum number of vertices is NAUTY_INFINITY-2, where 
NAUTY_INFINITY is currently defined to be the constant 2000000002.  Long 
ago this constant was called INFINITY, but that became a standard macro 
in C for the infinite double constant. Until this version, nauty.h 
defined INFINITY to equal NAUTY_INFINITY if INFINITY was not defined in 
<math.h>, but that was a standards violation and now it is gone.  If you 
have programs so old that they use INFINITY with the old nauty meaning, 
you need to change it to NAUTY_INFINITY.

Traces has not changed since the previous version.

As always, please report any problems with installation or usage.  We 
hope that this version will become the official release.

http://users.cecs.anu.edu.au/~bdm/nauty/ 
<http://users.cecs.anu.edu.au/~bdm/nauty/>
http://pallini.di.uniroma1.it <http://pallini.di.uniroma1.it/>

Take care.

Brendan McKay and Adolfo Pipero.