Well seems, they used sysroot from the toolchain:
Code:
Hello BloodRagg,
We're using the glibc from the toolchains here:
https://github.com/kobolabs/Kobo-Reader/tree/master/toolchain.
In particular, latest firmware would be using glibc from the
Linaro gcc 4.8 toolchain.
The source for the toolchain can be found around here
https://releases.linaro.org/archive/13.04/components/toolchain/gcc-linaro/4.8/
No modifications were made, except for stripping the binaries
of debug symbols to save space.
https://github.com/kobolabs/Kobo-Reader/issues/80
They were fast