dart --help --verbose does not list all flags.

[ghost]

An example of this is the --dfe= flag (or "string option") added here:

sdk/runtime/bin/main_options.cc

Line 82 in 501c807

DEFINE_STRING_OPTION_CB(dfe, { Options::dfe()->set_frontend_filename(value); });

[a-siva]

/cc @bkonyi

[bkonyi]

Unlike options defined within the VM proper, embedder options defined in runtime/bin need to be explicitly added to the help message. There's quite a few flags missing, but it's not clear whether or not that was intentional.

[jwren]

@bkonyi Is this something that can be moved to the Dart VM, or marked down in priority?

[bkonyi]

Yes, this isn't dartdev related and is low priority.