Installing a Cross-Toolchain on your PC

First, identify which CPU and C library the device uses

Log in to the device and ask it what CPU it has, e.g.
    $ uname -m
or
    $ cat /proc/cpuinfo
That should display the CPU type (e.g. i386, ppc, arm, mips, sh, m68k...)

Then guess the C library type with the command
    $ ls /lib/*libc-*
If you see libuClibc-0.9.8.so, the device uses uClibc-0.9.8.
If you see libc-2.2.5.so, the device uses glibc-2.2.5.