Compile error about no include/mavlink/v2.0

when i use PX4 console to compile 3.4.3version,the error occurs. because ardupilot\libraries\GCS_MAVLink\GCS_MAVLink.h need “include/mavlink/v2.0/ardupilotmega/version.h”

I find there is v1.0 in C:\Users**\Documents\GitHub\ardupilot\modules\PX4Firmware\mavlink\include\mavlink.
So, can you tell me where to download v2.0.

I believe the V2.0 headers can be generated using the mavlink generator . Read the readme at

Your error is way before that, on the generation of MAVLink headers. The make build system in the 3.4 branch just continues past it, so you need to go up and see why it is failing. My bet is you are missing some Python package (is your Pixhawk toolchain updated?).

Thank you for your advice.

Thank you so much, i solve my problem after updating.