uClibc - Wikipedia
https://en.wikipedia.org/wiki/UClibcIn computing, uClibc (sometimes written µClibc) is a small C standard library intended for Linux kernel-based operating systems for embedded systems and mobile devices. uClibc was written to support μClinux, a version of Linux not requiring a memory management unit and thus suited for microcontrollers (uCs; the "u" is a Latin script typographical approximation - not a proper romanization, …
[OpenWrt Wiki] OpenWrt version history
openwrt.org › about › historyDec 13, 2021 · OpenWrt version history Beginning The OpenWrt project started in January 2004. The first OpenWrt versions were based on Linksys GPL sources for WRT54G and a buildroot from the uClibc project. This version was known as OpenWrt stable release and was widely in use. There are still many OpenWrt applications, like the Freifunk-Firmware or Sip@Home, which are based on this version.