First of all: When the GCC is installed in the first pass, prompt "Cannot Find -LC", all from the online search, the prompts need to install such a package, I will find a for a long time, anyway I have not been able to find a suitable version, which makes me obey. Fortunately, I don't choose static compilation when I compile GCC, so I simply compile it. This is a small solution that has solved this problem, but this problem will only appear when using Mandrake, so I recommend that it is best not to use Mandrake when installing LFS.