Commits on Dec 19, 2014

1. rustc: Start "stabilizing" some flags …

   This commit shuffles around some CLI flags of the compiler to some more stable
   locations with some renamings. The changes made were:
   
   * The `-v` flag has been repurposes as the "verbose" flag. The version flag has
     been renamed to `-V`.
   * The `-h` screen has been split into two parts. Most top-level options (not
     all) show with `-h`, and the remaining options (generally obscure) can be
     shown with `--help -v` which is a "verbose help screen"
   * The `-V` flag (version flag now) has lost its argument as it is now requested
     with `rustc -vV` "verbose version".
   * The `--emit` option has had its `ir` and `bc` variants renamed to `llvm-ir`
     and `llvm-bc` to emphasize that they are LLVM's IR/bytecode.
   * The `--emit` option has grown a new variant, `dep-info`, which subsumes the
     `--dep-info` CLI argument. The `--dep-info` flag is now deprecated.
   * The `--parse-only`, `--no-trans`, and `--no-analysis` flags have
     moved behind the `-Z` family of flags.
   * The `--debuginfo` and `--opt-level` flags were moved behind the top-level `-C`
     flag.
   * The `--print-file-name` and `--print-crate-name` flags were moved behind one
     global `--print` flag which now accepts one of `crate-name`, `file-names`, or
     `sysroot`. This global `--print` flag is intended to serve as a mechanism for
     learning various metadata about the compiler itself.
   
   No warnings are currently enabled to allow tools like Cargo to have time to
   migrate to the new flags before spraying warnings to all users.

   

   alexcrichton committed Dec 19, 2014
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