diff options
| -rw-r--r-- | src/doc/rustc/src/command-line-arguments.md | 7 | ||||
| -rw-r--r-- | src/librustc_driver/lib.rs | 4 |
2 files changed, 9 insertions, 2 deletions
diff --git a/src/doc/rustc/src/command-line-arguments.md b/src/doc/rustc/src/command-line-arguments.md index d7e789b5a11..dfb40284ef6 100644 --- a/src/doc/rustc/src/command-line-arguments.md +++ b/src/doc/rustc/src/command-line-arguments.md @@ -86,6 +86,13 @@ This flag will set which lints should be set to the [deny level](lints/levels.ht This flag will set which lints should be set to the [forbid level](lints/levels.html#forbid). +## `-Z`: set unstable options + +This flag will allow you to set unstable options of rustc. In order to set multiple options, +the -Z flag can be used multiple times. For example: `rustc -Z verbose -Z time`. +Specifying options with -Z is only available on nightly. To view all available options +run: `rustc -Z help`. + ## `--cap-lints`: set the most restrictive lint level This flag lets you 'cap' lints, for more, [see here](lints/levels.html#capping-lints). diff --git a/src/librustc_driver/lib.rs b/src/librustc_driver/lib.rs index 2781bfa3ec8..66c7c9d0eae 100644 --- a/src/librustc_driver/lib.rs +++ b/src/librustc_driver/lib.rs @@ -744,7 +744,7 @@ fn usage(verbose: bool, include_unstable_options: bool) { } let message = "Usage: rustc [OPTIONS] INPUT"; let nightly_help = if nightly_options::is_nightly_build() { - "\n -Z help Print internal options for debugging rustc" + "\n -Z help Print unstable compiler options" } else { "" }; @@ -892,7 +892,7 @@ Available lint options: } fn describe_debug_flags() { - println!("\nAvailable debug options:\n"); + println!("\nAvailable options:\n"); print_flag_list("-Z", config::DB_OPTIONS); } |