Hi! actually crossdev do not support using the host architecture, when we try it , it request to use chroot. This affects directly on binhost, for example you want a binhost for a series of notebooks model, the model have a common CPU, and we would expect be able to optimize for that model. When we use chroot, we only can build optimization for CPU that has instructions as a subset of the Host, so basically you can only optimize cpus older than the binhost cpu. Servers/Binhosts usually takes a lot more time to be renovated, and are build different, a old one (5 years ago) can still be very nice for compiling or even better than a new notebook, this causes to be less probable be able to optimize new hardware for example notebooks. Would be idea be able to use crossdev to make a compiler that allows us to optimize the target hardware. I do not know in deep how this works, I know that it builds a special gcc and other tools to be used on the host and the output be the target, no idea if there is a way to make this. Thx!
A common way to avoid that check is to pass a custom value in the vendor field of the target triplet. For example: crossdev --target x86_64-lagu-linux-gnu
The way floppym suggests is the only feasible way. There's nothing to stop you just setting ROOT=/foo SYSROOT=/foo after doing some bootstrapping or extracting a stage3, but this generally doesn't work for a few reasons. It is often requested though, so I have experimented, but I currently still consider it virtually impossible.
