Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

BUILD.gn
static_library("Option") {
  output_name = "LLVMOption"
  deps = [ "//llvm/lib/Support" ]
  sources = [
    "Arg.cpp",
    "ArgList.cpp",
    "OptTable.cpp",
    "Option.cpp",
  ]
}