rustc: Remove broken --depend flag

src/comp/driver/rustc.rs

@@ -246,7 +246,6 @@ options:
     --ls               list the symbols defined by a crate file
     -L <path>          add a directory to the library search path
     --noverify         suppress LLVM verification step (slight speedup)
-    --depend           print dependencies, in makefile-rule form
     --parse-only       parse only; do not compile, assemble, or link
     --no-trans         run all passes except translation; no output
     -g                 produce debug info

src/comp/syntax/parse/eval.rs

@@ -8,14 +8,9 @@ import syntax::parse::parser::{parser, new_parser_from_file,
                                parse_mod_items, SOURCE_FILE};
 
 export eval_crate_directives_to_mod;
-export mode_parse;
-
-tag eval_mode { mode_depend; mode_parse; }
 
 type ctx =
     @{p: parser,
-      mode: eval_mode,
-      mutable deps: [str],
       sess: parser::parse_sess,
       mutable chpos: uint,
       mutable byte_pos: uint,
@@ -48,7 +43,6 @@ fn eval_crate_directive(cx: ctx, cdir: @ast::crate_directive, prefix: str,
             if std::fs::path_is_absolute(file_path) {
                 file_path
             } else { prefix + std::fs::path_sep() + file_path };
-        if cx.mode == mode_depend { cx.deps += [full_path]; ret; }
         let p0 =
             new_parser_from_file(cx.sess, cx.cfg, full_path, cx.chpos,
                                  cx.byte_pos, SOURCE_FILE);

src/comp/syntax/parse/parser.rs

@@ -2584,11 +2584,8 @@ fn parse_crate_from_crate_file(input: str, cfg: ast::crate_cfg,
     let crate_attrs = leading_attrs.inner;
     let first_cdir_attr = leading_attrs.next;
     let cdirs = parse_crate_directives(p, token::EOF, first_cdir_attr);
-    let deps: [str] = [];
     let cx =
         @{p: p,
-          mode: eval::mode_parse,
-          mutable deps: deps,
           sess: sess,
           mutable chpos: p.get_chpos(),
           mutable byte_pos: p.get_byte_pos(),