Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

tentative-defs.c
// Test with pch.
// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -fcommon -emit-pch -o %t.pch %S/tentative-defs.h
// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -fcommon -include-pch %t.pch -verify -emit-llvm -o %t %s
// REQUIRES: x86-registered-target

// RUN: grep "@variable = common global i32 0" %t | count 1
// RUN: grep "@incomplete_array = common global .*1 x i32" %t | count 1

// FIXME: expected-warning@tentative-defs.h:9{{tentative}}