/glibc-build/elf/ldconfig: Warning: ignoring configuration file that cannot be opened: /usr/glibc-compat/etc/ld.so.conf: No such file or directory
make[1]: Leaving directory '/glibc-2.23'
tar: Removing leading / from member names
Glibc needs ld.so.conf in the install destdir.
mkdir -p $prefix/etc
touch $prefix/etc/ld.so.conf