https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84744
--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> --- You need to recompile gcc telling it to use the new glibc. When GCC is built it creates fixed dependencies on the C library. You can't just point it to a new libc and expect it to work. A new C library needs a new compiler as well. So build GCC (see https://gcc.gnu.org/wiki/InstallingGCC for a starting point) and add --with-native-system-header-dir=/FaF/glibc/include/ to the configure options.
