Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

avr-atmega328p.c
// RUN: %clang_cc1 -E -dM -triple avr-unknown-unknown -target-cpu atmega328p /dev/null | FileCheck -match-full-lines %s

// CHECK: #define AVR 1
// CHECK: #define __AVR 1
// CHECK: #define __AVR_ATmega328P__ 1
// CHECK: #define __AVR__ 1
// CHECK: #define __ELF__ 1