Tell us more about your host system, what GCC version do you use? what is the distro?
Wich version of LFS are you building? It should not affect anything, the test suite isn't critical.
in this stage.
I never run test suits in the stage you were in, If I was you I would not worry bout this at all.
A note from the book.
In this chapter, some tests can be adversely affected by existing tools or environmental issues on the host system. Glibc test suite failures in this chapter are typically not worrisome. The Glibc installed in Chapter 6 is the one that will ultimately end up being used, so that is the one that needs to pass most tests (even in Chapter 6, some failures could still occur, for example, with the math tests).