uClibc, which was what OpenWRT used as their libc, shared quite a lot of code with glibc. They don't use it anymore because the project is dead though (no relea

uClibc, which was what OpenWRT used as their libc, shared quite a lot of code with glibc. They don't use it anymore because the project is dead though (no releases since 2012, no commits since mid-2015) so they switched to musl, which is looking really nice. uClibc was mainly trying to be a cut-down version of glibc, but musl aims for correctness (which can be difficult when a fair bit of software out there relies on glibc's quirks and bugs).