-
    re: "error: 'USBPHY_\\w+' undeclared"
    hint: "USBPHY_* pin definitions from <soc/usb_pins.h> have been removed.\nTo use an external USB PHY, wire it to any GPIOs and declare those pin mappings in your application to match your hardware."

-
    re: "fatal error: soc/uart_channel.h: No such file or directory"
    hint: "The header file 'soc/uart_channel.h' has been removed. All equivalent UART GPIO lookup macros can be found in 'soc/uart_pins.h' now."