The binary simple_switch is the Behavioral Model v2 (BMv2) implementation of a P4 switch.
It is statically compiled and availabe under /opt/p4c/simple_switch
You might need the simple_switch_CLI - it can be installed using
pip3 install p4-simple-switch-cli.
The P4C compiler cannot right now be compiled with Musl. Instead, use https://hub.docker.com/r/p4lang/p4c.