[Question] how to manually get essential host info instead of -C target-cpu=native

[wbprime]

Is your feature request related to a problem? Please describe.

It is adviced to add -C target-cpu=native flags when build crates using sonic-rs.

The idea behind was that the running/production host is the same with the building/dev host.

When the production host is not under control (say controlled by a dedicated ops team), how to get essential info to build crates.

1. the production host can not access the public net
2. hard to request ops team run build-time command (cargo ...)

Does there exist some tips to query essential info to achive the same effect as -C target-cpu=native does ?

Describe the solution you'd like

Provide some commands or instructions to collect essential info to achive the same effect as -C target-cpu=native does.

Describe alternatives you've considered

Provide some tricks to perpsuade ops team members to help collect host native info.

Additional context

None.

[liuq19]

We will support runtime detection, and will not need to add -C target-cpu=native.

related issue #14