diff options
| -rw-r--r-- | src/librustc_driver/lib.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs index 04513bfa53d..4974e6f24a8 100644 --- a/src/librustc_driver/lib.rs +++ b/src/librustc_driver/lib.rs @@ -1147,6 +1147,15 @@ fn usage(verbose: bool, include_unstable_options: bool) { verbose_help); } +fn print_wall_help() { + println!(" +The flag `-Wall` does not exist in `rustc`. Most useful lints are enabled by +default. Use `rustc -W help` to see all available lints. It's more common to put +warning settings in the crate root using `#![warn(LINT_NAME)]` instead of using +the command line flag directly. +"); +} + fn describe_lints(sess: &Session, lint_store: &lint::LintStore, loaded_plugins: bool) { println!(" Available lint options: @@ -1391,6 +1400,13 @@ pub fn handle_options(args: &[String]) -> Option<getopts::Matches> { return None; } + // Handle the special case of -Wall. + let wall = matches.opt_strs("W"); + if wall.iter().any(|x| *x == "all") { + print_wall_help(); + return None; + } + // Don't handle -W help here, because we might first load plugins. let r = matches.opt_strs("Z"); if r.iter().any(|x| *x == "help") { |