What's the rationale for this project? In other words, what makes it different than other embedded libc projects like Newlib or uClibc-ng or musl? Not seeing any documentation which answers this question.
The biggest thing for me is the meson build system. newlib uses autoconf-generated files checked into the build tree, with several different versions of autoconf used depending on directory. So you have to keep several versions of autoconf around if you want to add e.g. another source file without churning the generated files.