[toast0]

I don't know about newlib's library or code structure, but I've got a project I'm working on where I don't want a whole libc, but it's pretty easy to pull in bits and pieces of the FreeBSD libc; when I come across something else I need, I just add the C file it's in to my Makefile and that's usually enough. For the things that are self-contained, I don't need to build the environment libc expects, and if I try to include something that's not self-contained, the linker will yell about the missing symbols.

[klodolph]

The main use case for Newlib is embedded systems, and Newlib supports more architectures than FreeBSD does. Newlib also includes a few assembly routines for functions like memcpy and memset.

[toast0]

Sure, my point is, the question isn't use newlib or write your own, you can probably pick pieces out of it, rather than using the whole thing, by avoiding their build system and just using their source. I just don't know if the code (or license) is structured for that.