1 // Copyright 2012-2013 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use rustc::session::Session;
12 use rustc::session::config::{self, Input, OutputFilenames};
13 use rustc::session::search_paths::PathKind;
15 use rustc::metadata::creader::CrateReader;
16 use rustc::middle::{stability, ty, reachable};
17 use rustc::middle::dependency_format;
19 use rustc::plugin::load::Plugins;
20 use rustc::plugin::registry::Registry;
22 use rustc::util::common::time;
23 use rustc_borrowck as borrowck;
24 use rustc_resolve as resolve;
25 use rustc_trans::back::link;
26 use rustc_trans::back::write;
27 use rustc_trans::trans;
28 use rustc_typeck as typeck;
39 use syntax::attr::{AttrMetaMethods};
40 use syntax::diagnostics;
42 use syntax::parse::token;
45 pub fn compile_input(sess: Session,
46 cfg: ast::CrateConfig,
48 outdir: &Option<Path>,
49 output: &Option<Path>,
50 addl_plugins: Option<Vec<String>>,
51 control: CompileController) {
52 macro_rules! controller_entry_point{($point: ident, $make_state: expr) => ({
54 let state = $make_state;
55 (control.$point.callback)(state);
57 if control.$point.stop {
62 // We need nested scopes here, because the intermediate results can keep
63 // large chunks of memory alive and we want to free them as soon as
64 // possible to keep the peak memory usage low
65 let (outputs, trans, sess) = {
66 let (outputs, expanded_crate, id) = {
67 let krate = phase_1_parse_input(&sess, cfg, input);
69 controller_entry_point!(after_parse,
70 CompileState::state_after_parse(input,
75 let outputs = build_output_filenames(input,
80 let id = link::find_crate_name(Some(&sess),
84 = match phase_2_configure_and_expand(&sess,
92 (outputs, expanded_crate, id)
95 controller_entry_point!(after_expand,
96 CompileState::state_after_expand(input,
102 let mut forest = ast_map::Forest::new(expanded_crate);
103 let ast_map = assign_node_ids_and_map(&sess, &mut forest);
105 write_out_deps(&sess, input, &outputs, &id[]);
107 controller_entry_point!(after_write_deps,
108 CompileState::state_after_write_deps(input,
114 let arenas = ty::CtxtArenas::new();
115 let analysis = phase_3_run_analysis_passes(sess,
119 control.make_glob_map);
121 controller_entry_point!(after_analysis,
122 CompileState::state_after_analysis(input,
123 &analysis.ty_cx.sess,
125 analysis.ty_cx.map.krate(),
129 if log_enabled!(::log::INFO) {
130 println!("Pre-trans");
131 analysis.ty_cx.print_debug_stats();
133 let (tcx, trans) = phase_4_translate_to_llvm(analysis);
135 if log_enabled!(::log::INFO) {
136 println!("Post-trans");
137 tcx.print_debug_stats();
140 // Discard interned strings as they are no longer required.
141 token::get_ident_interner().clear();
143 (outputs, trans, tcx.sess)
145 phase_5_run_llvm_passes(&sess, &trans, &outputs);
147 controller_entry_point!(after_llvm,
148 CompileState::state_after_llvm(input,
153 phase_6_link_output(&sess, &trans, &outputs);
156 /// The name used for source code that doesn't originate in a file
157 /// (e.g. source from stdin or a string)
158 pub fn anon_src() -> String {
162 pub fn source_name(input: &Input) -> String {
164 // FIXME (#9639): This needs to handle non-utf8 paths
165 Input::File(ref ifile) => ifile.as_str().unwrap().to_string(),
166 Input::Str(_) => anon_src()
170 /// CompileController is used to customise compilation, it allows compilation to
171 /// be stopped and/or to call arbitrary code at various points in compilation.
172 /// It also allows for various flags to be set to influence what information gets
173 /// colelcted during compilation.
175 /// This is a somewhat higher level controller than a Session - the Session
176 /// controls what happens in each phase, whereas the CompileController controls
177 /// whether a phase is run at all and whether other code (from outside the
178 /// the compiler) is run between phases.
180 /// Note that if compilation is set to stop and a callback is provided for a
181 /// given entry point, the callback is called before compilation is stopped.
183 /// Expect more entry points to be added in the future.
184 pub struct CompileController<'a> {
185 pub after_parse: PhaseController<'a>,
186 pub after_expand: PhaseController<'a>,
187 pub after_write_deps: PhaseController<'a>,
188 pub after_analysis: PhaseController<'a>,
189 pub after_llvm: PhaseController<'a>,
191 pub make_glob_map: resolve::MakeGlobMap,
194 impl<'a> CompileController<'a> {
195 pub fn basic() -> CompileController<'a> {
197 after_parse: PhaseController::basic(),
198 after_expand: PhaseController::basic(),
199 after_write_deps: PhaseController::basic(),
200 after_analysis: PhaseController::basic(),
201 after_llvm: PhaseController::basic(),
202 make_glob_map: resolve::MakeGlobMap::No,
207 pub struct PhaseController<'a> {
209 pub callback: Box<Fn(CompileState) -> () + 'a>,
212 impl<'a> PhaseController<'a> {
213 pub fn basic() -> PhaseController<'a> {
216 callback: box |&: _| {},
221 /// State that is passed to a callback. What state is available depends on when
222 /// during compilation the callback is made. See the various constructor methods
223 /// (`state_*`) in the impl to see which data is provided for any given entry point.
224 pub struct CompileState<'a, 'ast: 'a, 'tcx: 'a> {
225 pub input: &'a Input,
226 pub session: &'a Session,
227 pub cfg: Option<&'a ast::CrateConfig>,
228 pub krate: Option<&'a ast::Crate>,
229 pub crate_name: Option<&'a str>,
230 pub output_filenames: Option<&'a OutputFilenames>,
231 pub out_dir: Option<&'a Path>,
232 pub expanded_crate: Option<&'a ast::Crate>,
233 pub ast_map: Option<&'a ast_map::Map<'ast>>,
234 pub analysis: Option<&'a ty::CrateAnalysis<'tcx>>,
235 pub tcx: Option<&'a ty::ctxt<'tcx>>,
236 pub trans: Option<&'a trans::CrateTranslation>,
239 impl<'a, 'ast, 'tcx> CompileState<'a, 'ast, 'tcx> {
240 fn empty(input: &'a Input,
241 session: &'a Session,
242 out_dir: &'a Option<Path>)
243 -> CompileState<'a, 'ast, 'tcx> {
247 out_dir: out_dir.as_ref(),
251 output_filenames: None,
252 expanded_crate: None,
260 fn state_after_parse(input: &'a Input,
261 session: &'a Session,
262 out_dir: &'a Option<Path>,
263 krate: &'a ast::Crate)
264 -> CompileState<'a, 'ast, 'tcx> {
267 .. CompileState::empty(input, session, out_dir)
271 fn state_after_expand(input: &'a Input,
272 session: &'a Session,
273 out_dir: &'a Option<Path>,
274 expanded_crate: &'a ast::Crate,
276 -> CompileState<'a, 'ast, 'tcx> {
278 crate_name: Some(crate_name),
279 expanded_crate: Some(expanded_crate),
280 .. CompileState::empty(input, session, out_dir)
284 fn state_after_write_deps(input: &'a Input,
285 session: &'a Session,
286 out_dir: &'a Option<Path>,
287 ast_map: &'a ast_map::Map<'ast>,
289 -> CompileState<'a, 'ast, 'tcx> {
291 crate_name: Some(crate_name),
292 ast_map: Some(ast_map),
293 .. CompileState::empty(input, session, out_dir)
297 fn state_after_analysis(input: &'a Input,
298 session: &'a Session,
299 out_dir: &'a Option<Path>,
300 krate: &'a ast::Crate,
301 analysis: &'a ty::CrateAnalysis<'tcx>,
302 tcx: &'a ty::ctxt<'tcx>)
303 -> CompileState<'a, 'ast, 'tcx> {
305 analysis: Some(analysis),
308 .. CompileState::empty(input, session, out_dir)
313 fn state_after_llvm(input: &'a Input,
314 session: &'a Session,
315 out_dir: &'a Option<Path>,
316 trans: &'a trans::CrateTranslation)
317 -> CompileState<'a, 'ast, 'tcx> {
320 .. CompileState::empty(input, session, out_dir)
325 pub fn phase_1_parse_input(sess: &Session, cfg: ast::CrateConfig, input: &Input)
327 // These may be left in an incoherent state after a previous compile.
328 // `clear_tables` and `get_ident_interner().clear()` can be used to free
329 // memory, but they do not restore the initial state.
330 syntax::ext::mtwt::reset_tables();
331 token::reset_ident_interner();
333 let krate = time(sess.time_passes(), "parsing", (), |_| {
335 Input::File(ref file) => {
336 parse::parse_crate_from_file(&(*file), cfg.clone(), &sess.parse_sess)
338 Input::Str(ref src) => {
339 parse::parse_crate_from_source_str(anon_src().to_string(),
347 if sess.opts.debugging_opts.ast_json_noexpand {
348 println!("{}", json::as_json(&krate));
351 if let Some(ref s) = sess.opts.show_span {
352 syntax::show_span::run(sess.diagnostic(), s.as_slice(), &krate);
358 // For continuing compilation after a parsed crate has been
361 /// Run the "early phases" of the compiler: initial `cfg` processing,
362 /// loading compiler plugins (including those from `addl_plugins`),
363 /// syntax expansion, secondary `cfg` expansion, synthesis of a test
364 /// harness if one is to be provided and injection of a dependency on the
365 /// standard library and prelude.
367 /// Returns `None` if we're aborting after handling -W help.
368 pub fn phase_2_configure_and_expand(sess: &Session,
369 mut krate: ast::Crate,
371 addl_plugins: Option<Vec<String>>)
372 -> Option<ast::Crate> {
373 let time_passes = sess.time_passes();
375 *sess.crate_types.borrow_mut() =
376 collect_crate_types(sess, &krate.attrs[]);
377 *sess.crate_metadata.borrow_mut() =
378 collect_crate_metadata(sess, &krate.attrs[]);
380 time(time_passes, "recursion limit", (), |_| {
381 middle::recursion_limit::update_recursion_limit(sess, &krate);
384 // strip before expansion to allow macros to depend on
385 // configuration variables e.g/ in
387 // #[macro_use] #[cfg(foo)]
388 // mod bar { macro_rules! baz!(() => {{}}) }
390 // baz! should not use this definition unless foo is enabled.
392 time(time_passes, "gated macro checking", (), |_| {
393 let (features, unknown_features) =
394 syntax::feature_gate::check_crate_macros(sess.codemap(),
395 &sess.parse_sess.span_diagnostic,
397 for uf in unknown_features.iter() {
398 sess.add_lint(lint::builtin::UNKNOWN_FEATURES,
401 "unknown feature".to_string());
404 // these need to be set "early" so that expansion sees `quote` if enabled.
405 *sess.features.borrow_mut() = features;
406 sess.abort_if_errors();
409 krate = time(time_passes, "configuration 1", krate, |krate|
410 syntax::config::strip_unconfigured_items(sess.diagnostic(), krate));
412 krate = time(time_passes, "crate injection", krate, |krate|
413 syntax::std_inject::maybe_inject_crates_ref(krate,
414 sess.opts.alt_std_name.clone()));
416 let mut addl_plugins = Some(addl_plugins);
417 let Plugins { macros, registrars }
418 = time(time_passes, "plugin loading", (), |_|
419 plugin::load::load_plugins(sess, &krate, addl_plugins.take().unwrap()));
421 let mut registry = Registry::new(sess, &krate);
423 time(time_passes, "plugin registration", registrars, |registrars| {
424 if sess.features.borrow().rustc_diagnostic_macros {
425 registry.register_macro("__diagnostic_used",
426 diagnostics::plugin::expand_diagnostic_used);
427 registry.register_macro("__register_diagnostic",
428 diagnostics::plugin::expand_register_diagnostic);
429 registry.register_macro("__build_diagnostic_array",
430 diagnostics::plugin::expand_build_diagnostic_array);
433 for registrar in registrars.into_iter() {
434 registry.args_hidden = Some(registrar.args);
435 (registrar.fun)(&mut registry);
439 let Registry { syntax_exts, lint_passes, lint_groups, .. } = registry;
442 let mut ls = sess.lint_store.borrow_mut();
443 for pass in lint_passes.into_iter() {
444 ls.register_pass(Some(sess), true, pass);
447 for (name, to) in lint_groups.into_iter() {
448 ls.register_group(Some(sess), true, name, to);
452 // Lint plugins are registered; now we can process command line flags.
453 if sess.opts.describe_lints {
454 super::describe_lints(&*sess.lint_store.borrow(), true);
457 sess.lint_store.borrow_mut().process_command_line(sess);
459 // Abort if there are errors from lint processing or a plugin registrar.
460 sess.abort_if_errors();
462 krate = time(time_passes, "expansion", (krate, macros, syntax_exts),
463 |(krate, macros, syntax_exts)| {
464 // Windows dlls do not have rpaths, so they don't know how to find their
465 // dependencies. It's up to us to tell the system where to find all the
466 // dependent dlls. Note that this uses cfg!(windows) as opposed to
467 // targ_cfg because syntax extensions are always loaded for the host
468 // compiler, not for the target.
469 let mut _old_path = String::new();
471 _old_path = os::getenv("PATH").unwrap_or(_old_path);
472 let mut new_path = sess.host_filesearch(PathKind::All).get_dylib_search_paths();
473 new_path.extend(os::split_paths(&_old_path[]).into_iter());
474 os::setenv("PATH", os::join_paths(&new_path[]).unwrap());
476 let cfg = syntax::ext::expand::ExpansionConfig {
477 crate_name: crate_name.to_string(),
478 enable_quotes: sess.features.borrow().quote,
479 recursion_limit: sess.recursion_limit.get(),
481 let ret = syntax::ext::expand::expand_crate(&sess.parse_sess,
487 os::setenv("PATH", _old_path);
493 // Needs to go *after* expansion to be able to check the results of macro expansion.
494 time(time_passes, "complete gated feature checking", (), |_| {
495 syntax::feature_gate::check_crate(sess.codemap(),
496 &sess.parse_sess.span_diagnostic,
498 sess.abort_if_errors();
501 // JBC: make CFG processing part of expansion to avoid this problem:
503 // strip again, in case expansion added anything with a #[cfg].
504 krate = time(time_passes, "configuration 2", krate, |krate|
505 syntax::config::strip_unconfigured_items(sess.diagnostic(), krate));
507 krate = time(time_passes, "maybe building test harness", krate, |krate|
508 syntax::test::modify_for_testing(&sess.parse_sess,
513 krate = time(time_passes, "prelude injection", krate, |krate|
514 syntax::std_inject::maybe_inject_prelude(krate));
516 time(time_passes, "checking that all macro invocations are gone", &krate, |krate|
517 syntax::ext::expand::check_for_macros(&sess.parse_sess, krate));
522 pub fn assign_node_ids_and_map<'ast>(sess: &Session,
523 forest: &'ast mut ast_map::Forest)
524 -> ast_map::Map<'ast> {
525 struct NodeIdAssigner<'a> {
529 impl<'a> ast_map::FoldOps for NodeIdAssigner<'a> {
530 fn new_id(&self, old_id: ast::NodeId) -> ast::NodeId {
531 assert_eq!(old_id, ast::DUMMY_NODE_ID);
532 self.sess.next_node_id()
536 let map = time(sess.time_passes(), "assigning node ids and indexing ast", forest, |forest|
537 ast_map::map_crate(forest, NodeIdAssigner { sess: sess }));
539 if sess.opts.debugging_opts.ast_json {
540 println!("{}", json::as_json(map.krate()));
546 /// Run the resolution, typechecking, region checking and other
547 /// miscellaneous analysis passes on the crate. Return various
548 /// structures carrying the results of the analysis.
549 pub fn phase_3_run_analysis_passes<'tcx>(sess: Session,
550 ast_map: ast_map::Map<'tcx>,
551 arenas: &'tcx ty::CtxtArenas<'tcx>,
553 make_glob_map: resolve::MakeGlobMap)
554 -> ty::CrateAnalysis<'tcx> {
555 let time_passes = sess.time_passes();
556 let krate = ast_map.krate();
558 time(time_passes, "external crate/lib resolution", (), |_|
559 CrateReader::new(&sess).read_crates(krate));
561 let lang_items = time(time_passes, "language item collection", (), |_|
562 middle::lang_items::collect_language_items(krate, &sess));
564 let resolve::CrateMap {
574 time(time_passes, "resolution", (),
575 |_| resolve::resolve_crate(&sess,
581 // Discard MTWT tables that aren't required past resolution.
582 syntax::ext::mtwt::clear_tables();
584 let named_region_map = time(time_passes, "lifetime resolution", (),
585 |_| middle::resolve_lifetime::krate(&sess, krate, &def_map));
587 time(time_passes, "looking for entry point", (),
588 |_| middle::entry::find_entry_point(&sess, &ast_map));
590 sess.plugin_registrar_fn.set(
591 time(time_passes, "looking for plugin registrar", (), |_|
592 plugin::build::find_plugin_registrar(
593 sess.diagnostic(), krate)));
595 let region_map = time(time_passes, "region resolution", (), |_|
596 middle::region::resolve_crate(&sess, krate));
598 time(time_passes, "loop checking", (), |_|
599 middle::check_loop::check_crate(&sess, krate));
601 let stability_index = time(time_passes, "stability index", (), |_|
602 stability::Index::build(&sess, krate));
604 time(time_passes, "static item recursion checking", (), |_|
605 middle::check_static_recursion::check_crate(&sess, krate, &def_map, &ast_map));
607 let ty_cx = ty::mk_ctxt(sess,
618 // passes are timed inside typeck
619 typeck::check_crate(&ty_cx, trait_map);
621 time(time_passes, "check static items", (), |_|
622 middle::check_static::check_crate(&ty_cx));
624 // These next two const passes can probably be merged
625 time(time_passes, "const marking", (), |_|
626 middle::const_eval::process_crate(&ty_cx));
628 time(time_passes, "const checking", (), |_|
629 middle::check_const::check_crate(&ty_cx));
631 let maps = (external_exports, last_private_map);
632 let (exported_items, public_items) =
633 time(time_passes, "privacy checking", maps, |(a, b)|
634 rustc_privacy::check_crate(&ty_cx, &export_map, a, b));
636 time(time_passes, "intrinsic checking", (), |_|
637 middle::intrinsicck::check_crate(&ty_cx));
639 time(time_passes, "effect checking", (), |_|
640 middle::effect::check_crate(&ty_cx));
642 time(time_passes, "match checking", (), |_|
643 middle::check_match::check_crate(&ty_cx));
645 time(time_passes, "liveness checking", (), |_|
646 middle::liveness::check_crate(&ty_cx));
648 time(time_passes, "borrow checking", (), |_|
649 borrowck::check_crate(&ty_cx));
651 time(time_passes, "rvalue checking", (), |_|
652 middle::check_rvalues::check_crate(&ty_cx, krate));
654 // Avoid overwhelming user with errors if type checking failed.
655 // I'm not sure how helpful this is, to be honest, but it avoids a
656 // lot of annoying errors in the compile-fail tests (basically,
657 // lint warnings and so on -- kindck used to do this abort, but
658 // kindck is gone now). -nmatsakis
659 ty_cx.sess.abort_if_errors();
662 time(time_passes, "reachability checking", (), |_|
663 reachable::find_reachable(&ty_cx, &exported_items));
665 time(time_passes, "death checking", (), |_| {
666 middle::dead::check_crate(&ty_cx,
671 time(time_passes, "lint checking", (), |_|
672 lint::check_crate(&ty_cx, &exported_items));
675 export_map: export_map,
677 exported_items: exported_items,
678 public_items: public_items,
679 reachable: reachable_map,
685 /// Run the translation phase to LLVM, after which the AST and analysis can
687 pub fn phase_4_translate_to_llvm<'tcx>(analysis: ty::CrateAnalysis<'tcx>)
688 -> (ty::ctxt<'tcx>, trans::CrateTranslation) {
689 let time_passes = analysis.ty_cx.sess.time_passes();
691 time(time_passes, "resolving dependency formats", (), |_|
692 dependency_format::calculate(&analysis.ty_cx));
694 // Option dance to work around the lack of stack once closures.
695 time(time_passes, "translation", analysis, |analysis|
696 trans::trans_crate(analysis))
699 /// Run LLVM itself, producing a bitcode file, assembly file or object file
700 /// as a side effect.
701 pub fn phase_5_run_llvm_passes(sess: &Session,
702 trans: &trans::CrateTranslation,
703 outputs: &OutputFilenames) {
704 if sess.opts.cg.no_integrated_as {
705 let output_type = config::OutputTypeAssembly;
707 time(sess.time_passes(), "LLVM passes", (), |_|
708 write::run_passes(sess, trans, &[output_type], outputs));
710 write::run_assembler(sess, outputs);
712 // Remove assembly source, unless --save-temps was specified
713 if !sess.opts.cg.save_temps {
714 fs::unlink(&outputs.temp_path(config::OutputTypeAssembly)).unwrap();
717 time(sess.time_passes(), "LLVM passes", (), |_|
718 write::run_passes(sess,
720 &sess.opts.output_types[],
724 sess.abort_if_errors();
727 /// Run the linker on any artifacts that resulted from the LLVM run.
728 /// This should produce either a finished executable or library.
729 pub fn phase_6_link_output(sess: &Session,
730 trans: &trans::CrateTranslation,
731 outputs: &OutputFilenames) {
732 let old_path = os::getenv("PATH").unwrap_or_else(||String::new());
733 let mut new_path = sess.host_filesearch(PathKind::All).get_tools_search_paths();
734 new_path.extend(os::split_paths(&old_path[]).into_iter());
735 os::setenv("PATH", os::join_paths(&new_path[]).unwrap());
737 time(sess.time_passes(), "linking", (), |_|
738 link::link_binary(sess,
741 &trans.link.crate_name[]));
743 os::setenv("PATH", old_path);
746 fn escape_dep_filename(filename: &str) -> String {
747 // Apparently clang and gcc *only* escape spaces:
748 // http://llvm.org/klaus/clang/commit/9d50634cfc268ecc9a7250226dd5ca0e945240d4
749 filename.replace(" ", "\\ ")
752 fn write_out_deps(sess: &Session,
754 outputs: &OutputFilenames,
757 let mut out_filenames = Vec::new();
758 for output_type in sess.opts.output_types.iter() {
759 let file = outputs.path(*output_type);
761 config::OutputTypeExe => {
762 for output in sess.crate_types.borrow().iter() {
763 let p = link::filename_for_input(sess, *output,
765 out_filenames.push(p);
768 _ => { out_filenames.push(file); }
772 // Write out dependency rules to the dep-info file if requested with
774 let deps_filename = match sess.opts.write_dependency_info {
775 // Use filename from --dep-file argument if given
776 (true, Some(ref filename)) => filename.clone(),
777 // Use default filename: crate source filename with extension replaced
779 (true, None) => match *input {
780 Input::File(..) => outputs.with_extension("d"),
782 sess.warn("can not write --dep-info without a filename \
783 when compiling stdin.");
790 let result = (|&:| -> io::IoResult<()> {
791 // Build a list of files used to compile the output and
792 // write Makefile-compatible dependency rules
793 let files: Vec<String> = sess.codemap().files.borrow()
794 .iter().filter(|fmap| fmap.is_real_file())
795 .map(|fmap| escape_dep_filename(&fmap.name[]))
797 let mut file = try!(io::File::create(&deps_filename));
798 for path in out_filenames.iter() {
799 try!(write!(&mut file as &mut Writer,
800 "{}: {}\n\n", path.display(), files.connect(" ")));
808 sess.fatal(&format!("error writing dependencies to `{}`: {}",
809 deps_filename.display(), e)[]);
814 pub fn collect_crate_types(session: &Session,
815 attrs: &[ast::Attribute]) -> Vec<config::CrateType> {
816 // Unconditionally collect crate types from attributes to make them used
817 let attr_types: Vec<config::CrateType> = attrs.iter().filter_map(|a| {
818 if a.check_name("crate_type") {
819 match a.value_str() {
820 Some(ref n) if *n == "rlib" => {
821 Some(config::CrateTypeRlib)
823 Some(ref n) if *n == "dylib" => {
824 Some(config::CrateTypeDylib)
826 Some(ref n) if *n == "lib" => {
827 Some(config::default_lib_output())
829 Some(ref n) if *n == "staticlib" => {
830 Some(config::CrateTypeStaticlib)
832 Some(ref n) if *n == "bin" => Some(config::CrateTypeExecutable),
834 session.add_lint(lint::builtin::UNKNOWN_CRATE_TYPES,
837 "invalid `crate_type` \
842 session.add_lint(lint::builtin::UNKNOWN_CRATE_TYPES,
845 "`crate_type` requires a \
855 // If we're generating a test executable, then ignore all other output
856 // styles at all other locations
857 if session.opts.test {
858 return vec!(config::CrateTypeExecutable)
861 // Only check command line flags if present. If no types are specified by
862 // command line, then reuse the empty `base` Vec to hold the types that
863 // will be found in crate attributes.
864 let mut base = session.opts.crate_types.clone();
866 base.extend(attr_types.into_iter());
868 base.push(link::default_output_for_target(session));
874 base.into_iter().filter(|crate_type| {
875 let res = !link::invalid_output_for_target(session, *crate_type);
878 session.warn(&format!("dropping unsupported crate type `{:?}` \
880 *crate_type, session.opts.target_triple)[]);
887 pub fn collect_crate_metadata(session: &Session,
888 _attrs: &[ast::Attribute]) -> Vec<String> {
889 session.opts.cg.metadata.clone()
892 pub fn build_output_filenames(input: &Input,
894 ofile: &Option<Path>,
895 attrs: &[ast::Attribute],
900 // "-" as input file will cause the parser to read from stdin so we
901 // have to make up a name
902 // We want to toss everything after the final '.'
903 let dirpath = match *odir {
904 Some(ref d) => d.clone(),
905 None => Path::new(".")
908 // If a crate name is present, we use it as the link name
909 let stem = sess.opts.crate_name.clone().or_else(|| {
910 attr::find_crate_name(attrs).map(|n| n.get().to_string())
911 }).unwrap_or(input.filestem());
914 out_directory: dirpath,
916 single_output_file: None,
917 extra: sess.opts.cg.extra_filename.clone(),
921 Some(ref out_file) => {
922 let ofile = if sess.opts.output_types.len() > 1 {
923 sess.warn("ignoring specified output filename because multiple \
924 outputs were requested");
927 Some(out_file.clone())
930 sess.warn("ignoring --out-dir flag due to -o flag.");
933 out_directory: out_file.dir_path(),
934 out_filestem: out_file.filestem_str().unwrap().to_string(),
935 single_output_file: ofile,
936 extra: sess.opts.cg.extra_filename.clone(),