well I installed gmp the way it instructed and then I did a search for mpfr on the same website and installed it as well, but couldn't find gibc or mpc. I was going to do a search for the missing files but figured I would run version-check first to ensure I wasn't just spinning my wheels. It appears the two files were not installed correctly enough for LInux from Scratch.
~$ bash version-check.sh
---truncate---
version-check.sh: line 32: glibc: command not found
g++ compilation OK
libgmp.la: found
libmpfr.la: found
libmpc.la: not found