When dealing with embedded software, I often find useful to have the standard C functions we all learn during our first programming course:
A common way to have them is using Newlib. Newlib is an implementation of the standard C library that is specifically thought to run somewhere with low resources and undefined hardware. The idea of Newlib is to implement the hardware-independent parts of the standard C library and rely on few low-level system calls that must be implemented with the target hardware in mind.
I compiled Newlib with the CodeSourcery ARM compiler for bare-metal targets: Sourcery G++ Lite 2010.09-51. Once the toolchain is installed, the commands I used to download compile Newlib are: