Never seen this one before, but I do know that using the liveCD to build LFS 6.7 works.
Without any information (the actual command you used and the actual error message [last 10-15 lines]), the only thing I can say is: You did something wrong somewhere.
EDIT: I just noticed you also have another active thread about glibc 2.12.1
. I do hope this is a new issue and the other one is solved....... Double posting is against the LQ rules. I'll give you the benefit of the doubt for now and will not report this on for closure (for now).