Thumb2 is an extension on ARM architecture that basically allows binaries and libraries to be smaller.

Our TI processor has a bug that didn't allow Thumb2 compiled binaries to run properly (they crash). To avoid that, a workaround (the errata) must be introduced in the kernel.

freemangordon is now leading an effort to build CSSU with community kernel with Thumb2 enabled.

Until then, you won't be able to use any Thumb2 binary in Fremantle.

To build properly in Fremantle, you need to deactivate hardfp and thumb2 in compiler flags.