[centos]which: no tclsh8.5 redis

make[1]: Entering directory `/redis/redis-2.4.7/src'

which: no tclsh8.5 in (/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin)

You need 'tclsh8.5' in order to run the Redis test