64-bit machine not supported by autoconf

[David.Lou]

Hello,

I am using autoconf to generate "configure" file to compile some C++ 
libs in 64-bit RedHat Enterprise Linux machine.
But it always reports "x86_64" machine unknown. Please  help , thanks.


--
Best Regards,

David Lou (Dongjun LOU)
Beijing Design Center
Analog Devices, Inc.
E-mail: [EMAIL PROTECTED]
PHONE: 86-10-82782727 -1066
FAX: 86-10-62981404