Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: %clang_cc1 -emit-llvm %s -o /dev/null typedef struct { } the_coolest_struct_in_the_world; extern the_coolest_struct_in_the_world xyzzy; void *foo(void) { return &xyzzy; }