@@ -51,10 +51,27 @@
                         Set a codegen option
     -V, --version       Print version info and exit
     -v, --verbose       Use verbose output
+        --extern NAME[=PATH]
+                        Specify where an external rust library is located
+        --sysroot PATH  Override the system root
+        --error-format human|json|short
+                        How errors and other messages are produced
+        --json CONFIG   Configure the JSON output of the compiler
+        --color auto|always|never
+                        Configure coloring of output:
+                        auto = colorize, if output goes to a tty (default);
+                        always = always colorize output;
+                        never = never colorize output
+        --diagnostic-width WIDTH
+                        Inform rustc of the width of the output so that
+                        diagnostics can be truncated to fit
+        --remap-path-prefix FROM=TO
+                        Remap source names in all output (compiler messages
+                        and output files)
+    @path               Read newline separated options from `path`
 
 Additional help:
     -C help             Print codegen options
     -W help             Print 'lint' options and default settings
     -Z help             Print unstable compiler options
-    --help -v           Print the full set of options rustc accepts