Hello,John,
>>what development environment, tool chain, and setup for Linux build for i.MX6 Sabre platform?
We release linux bsp with LTIB now, and Yocto in the fulture. when litb or yocto is installed to computer, compiler and tool chain will be installed at same time.
>>Do you know if the build tool or compiler/script is multi-threaded?
Yes.
Regards,
Weidong