This is a modified version of sgerrand/docker-glibc-builder that automatically builds a glibc binary package for x86_64 AND aarch64 for use in alpine docker images.
Compiled packages are published in a release - available for anyone to use.
These binaries are then used by imagegenius/aports to build glibc packages for x86_64 and aarch64 and are available in a docker baseimage and as alpine packages in the imagegenius repo.