configure: error: /bin/sh ./config.sub x86_64-unknown-linuxoldld failed

Error while Configure VQadmin.

Ver :- Vqadmin-2.3.6

[root@rk vqadmin-2.3.6]# ./configure --enable-cgibindir=/var/www/cgi-bin --enable-htmldir=/var/www/html
checking for a bsd-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
/downloads/qmailrocks/vqadmin-2.3.6/missing: Unknown `--run' option
Try `/downloads/qmailrocks/vqadmin-2.3.6/missing --help' for more information
configure: WARNING: `missing' script is too old or missing
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking build system type... Invalid configuration `x86_64-unknown-linuxoldld': machine `x86_64-unknown' not recognized
configure: error: /bin/sh ./config.sub x86_64-unknown-linuxoldld failed

Resolution:-

[root@rk vqadmin-2.3.6]# cp ../vpopmail-5.4.13/config.sub ./
cp: overwrite `./config.sub'? y

Run Again.

[root@rk vqadmin-2.3.6]# ./configure --enable-cgibindir=/var/www/cgi-bin --enable-htmldir=/var/www/html
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane.....YES
/downloads/qmailrocks/vqadmin-2.3.6/missing: Unknown `--run' option
Try `/downloads/qmailrocks/vqadmin-2.3.6/missing --help' for more information
configure: WARNING: `missing' script is too old or missing
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking build system type... x86_64-unknown-linux-gnuoldld
checking host system type... x86_64-unknown-linux-gnuoldld
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 gcc option to accept ANSI C... none needed
checking for style of include used by make... GNU
checking dependency style of gcc... none
checking for ranlib... ranlib
checking for strerror in -lcposix... no
checking how to run the C preprocessor... gcc -E
checking for egrep... grep -E
checking for AIX... no
yes
checking for dirent.h that defines DIR... yes
checking for library containing opendir... none required
checking for ANSI C header files... yes
checking for sys/types.h... yes
checking for sys/stat.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for memory.h... yes
checking for strings.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for unistd.h... yes
checking for unistd.h... (cached) yes
checking for an ANSI C-conforming const... yes
checking for size_t... yes
checking whether struct tm is in sys/time.h or time.h... time.h
checking for crypt in -lcrypt... yes
checking for floor in -lm... yes
checking for compress in -lz... yes
configure: creating ./config.status
config.status: creating Makefile
config.status: creating config.h
config.status: executing depfiles commands

            Current settings
---------------------------------------
vpopmail directory = /home/vpopmail
               uid = 510
               gid = 505
       cgi-bin dir = /var/www/cgi-bin
       vqadmin dir = /var/www/cgi-bin/vqadmin
    mysql features = disabled