To compile on Intel Core 2 (64 bit) processors running MacOSX,
you might need to add the compilation flags "-m64 -fast" by 

./configure CFLAGS="-m64 -fast"

This may apply to other operating systems.  Also, note that
this does not apply to 32 bit processors like 
Intel Core processor.

Komei Fukuda
February 14, 2009
