21654a2f44
Overhaul the `-l` option parser (for linking to native libs) The current parser for `-l` options has accumulated over time, making it hard to follow. This PR tries to clean it up in several ways. Key changes: - This code now gets its own submodule, to slightly reduce clutter in `rustc_session::config`. - Cleaner division between iterating over multiple `-l` options, and processing each individual one. - Separate “split” step that breaks up the value string into `[KIND[:MODIFIERS]=]NAME[:NEW_NAME]`, but leaves parsing/validating those parts to later steps. - This step also gets its own (disposable) unit test, to make sure it works as expected. - A context struct reduces the burden of parameter passing, and makes it easier to write error messages that adapt to nightly/stable compilers. - Fewer calls to `nightly_options` helper functions, because at this point we can get the same information from `UnstableOptions` and `UnstableFeatures` (which are downstream of earlier calls to those helper functions). There should be no overall change in compiler behaviour. |
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