This is collection of (almost) statically linked binaries and libraries built for 32-bit LSB MIPS processor.
uClibc and libgcc may be linked dynamically.
To reduce the size of the statically linked stuff, compile it with CFLAGS='-Os -fdata-sections -ffunction-sections' and then link with LDFLAGS='-Wl,--gc-sections -Wl,--strip-all'.
First places every function into a separate section and then linker prunes all unused sections and symbols.