Thanks. That makes sense; all the cross compile tools are built using the Host machines native toolchain on the host then the cross-toolchain used to cross compile yocto for the target.

On 3 February 2016 at 17:13, Burton, Ross <ross.burton@intel.com> wrote:

On 3 February 2016 at 15:07, Mark T <mtl1nuxd3v@gmail.com> wrote:
I notice there is a meta/recipes-devtools - I assume this pulls in from build/downloads - so gcc-5.2.0.tar.bz2 for example. Does the tool-chain comprised of these recipes get built by /usr/bin/gcc before being used to compile Yocto ?

The host's gcc (typically /usr/bin/gcc) is used to build gcc-cross, which is then used to compile everything that needs to be cross-compiled. We don't build our own native compiler to replace the host compiler.

Ross