I recently got cross compiling working with the following configuration:
build machine is Linux_x64 target is Linux_ARMv7_hardfp
Currently able to run the SunTemple demo on Jetson Tk1 platform.
The toolchain used is the arm-linux-gnueabihf linaro cross toolchain that can be downloaded.
Is there any interest/objection to attempt integration of this cross compile ability to the main tree ?