#2 ./configure fails on x86_64

[Anonymous]

root@> pwd
/tmp/gcover-0.1.3
root@l> ./configure
checking for a BSD-compatible install...
/usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... gawk
checking whether make sets ${MAKE}... yes
checking whether to enable maintainer-specific portions
of Makefiles... no
checking for gcc... gcc
checking for C compiler default output... a.out
checking whether the C compiler works... yes
checking whether we are cross compiling... no
checking for suffix of executables...
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for style of include used by make... GNU
checking dependency style of gcc... gcc3
checking for strerror in -lcposix... no
checking how to run the C preprocessor... gcc -E
checking for ANSI C header files... yes
checking build system type... Invalid configuration
`x86_64-unknown-linux-gnu': machine `x86_64-unknown'
not recognized
configure: error: /bin/sh ./config.sub
x86_64-unknown-linux-gnu failed
root@l> uname -a
Linux linux 2.6.11-1.1369_FC4 #1 Thu Jun 2 22:56:33 EDT
2005 x86_64 x86_64 x86_64 GNU/Linux
root@> date
Mon Jul 4 21:31:56 IST 2005

many thanks for any help