Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

gen-dwarf-producer.s
// RUN: env DEBUG_PRODUCER="my producer" llvm-mc -g -triple i386-apple-darwin10 %s -filetype=obj -o %t
// RUN: llvm-dwarfdump -v -debug-info %t | FileCheck %s

.globl _bar
_bar:
	ret

// CHECK:    DW_AT_producer [DW_FORM_string]	("my producer")