diff --git a/src/comp/driver/rustc.rs b/src/comp/driver/rustc.rs
index a6f6ae05062..6a37dece845 100644
--- a/src/comp/driver/rustc.rs
+++ b/src/comp/driver/rustc.rs
@@ -82,6 +82,7 @@ fn compile_input(session.session sess,
                         str input, str output,
                         bool shared,
                         bool optimize,
+                        bool debuginfo,
                         bool verify,
                         bool save_temps,
                         trans.output_type ot,
@@ -115,11 +116,12 @@ fn compile_input(session.session sess,
 
     auto llmod = time[llvm.ModuleRef](time_passes, "translation",
         bind trans.trans_crate(sess, crate, ty_cx, type_cache, output,
-                               shared));
+                               debuginfo, shared));
 
     time[()](time_passes, "LLVM passes",
-        bind trans.run_passes(llmod, optimize, verify, save_temps, output,
-                              ot));
+             bind trans.run_passes(llmod, optimize, debuginfo,
+                                   verify, save_temps, output,
+                                   ot));
 }
 
 fn pretty_print_input(session.session sess,
@@ -144,6 +146,7 @@ options:
     --noverify         suppress LLVM verification step (slight speedup)
     --depend           print dependencies, in makefile-rule form
     --parse-only       parse only; do not compile, assemble, or link
+    -g                 produce debug info
     -O                 optimize
     -S                 compile only; do not assemble or link
     -c                 compile and assemble, but do not link
@@ -178,7 +181,7 @@ fn main(vec[str] args) {
     auto opts = vec(optflag("h"), optflag("glue"),
                     optflag("pretty"), optflag("ls"), optflag("parse-only"),
                     optflag("O"), optflag("shared"), optmulti("L"),
-                    optflag("S"), optflag("c"), optopt("o"),
+                    optflag("S"), optflag("c"), optopt("o"), optopt("g"),
                     optflag("save-temps"), optflag("time-passes"),
                     optflag("no-typestate"), optflag("noverify"));
     auto binary = _vec.shift[str](args);
@@ -210,6 +213,7 @@ fn main(vec[str] args) {
     auto save_temps = opt_present(match, "save-temps");
     // FIXME: Maybe we should support -O0, -O1, -Os, etc
     auto optimize = opt_present(match, "O");
+    auto debuginfo = opt_present(match, "g");
     auto time_passes = opt_present(match, "time-passes");
     auto run_typestate = !opt_present(match, "no-typestate");
     auto n_inputs = _vec.len[str](match.free);
@@ -243,15 +247,15 @@ fn main(vec[str] args) {
                 parts += vec("bc");
                 auto ofile = _str.connect(parts, ".");
                 compile_input(sess, env, ifile, ofile, shared,
-                              optimize, verify, save_temps, ot,
-                              time_passes, run_typestate,
-                              library_search_paths);
+                              optimize, debuginfo, verify,
+                              save_temps, ot, time_passes,
+                              run_typestate, library_search_paths);
             }
             case (some[str](?ofile)) {
                 compile_input(sess, env, ifile, ofile, shared,
-                              optimize, verify, save_temps, ot,
-                              time_passes, run_typestate,
-                              library_search_paths);
+                              optimize, debuginfo, verify,
+                              save_temps, ot, time_passes,
+                              run_typestate, library_search_paths);
             }
         }
     }
diff --git a/src/comp/middle/trans.rs b/src/comp/middle/trans.rs
index 6f216a97f8a..7e8e788efa8 100644
--- a/src/comp/middle/trans.rs
+++ b/src/comp/middle/trans.rs
@@ -116,7 +116,8 @@ state type crate_ctxt = rec(session.session sess,
                             std.sha1.sha1 sha,
                             hashmap[ty.t, str] type_sha1s,
                             hashmap[ty.t, metadata.ty_abbrev] type_abbrevs,
-                            ty.ctxt tcx);
+                            ty.ctxt tcx,
+                            bool debuginfo);
 
 type local_ctxt = rec(vec[str] path,
                       vec[str] module_path,
@@ -1785,8 +1786,13 @@ fn declare_generic_glue(@local_ctxt cx,
                         ty.t t,
                         TypeRef llfnty,
                         str name) -> ValueRef {
-    auto fn_nm = mangle_name_by_type_only(cx.ccx, t, "glue_" + name);
-    fn_nm = sanitize(fn_nm);
+    auto fn_nm;
+    if (cx.ccx.debuginfo) {
+        fn_nm = mangle_name_by_type_only(cx.ccx, t, "glue_" + name);
+        fn_nm = sanitize(fn_nm);
+    } else {
+        fn_nm = mangle_name_by_seq(cx.ccx, cx.path,  "glue_" + name);
+    }
     auto llfn = decl_internal_fastcall_fn(cx.ccx.llmod, fn_nm, llfnty);
     ret llfn;
 }
@@ -7241,8 +7247,8 @@ fn is_object_or_assembly(output_type ot) -> bool {
     ret false;
 }
 
-fn run_passes(ModuleRef llmod, bool opt, bool verify, bool save_temps,
-              str output, output_type ot) {
+fn run_passes(ModuleRef llmod, bool opt, bool dbg, bool verify,
+              bool save_temps, str output, output_type ot) {
     auto pm = mk_pass_manager();
 
     // TODO: run the linter here also, once there are llvm-c bindings for it.
@@ -7733,7 +7739,7 @@ fn make_common_glue(str output, bool optimize, bool verify, bool save_temps,
 
     trans_exit_task_glue(glues, new_str_hash[ValueRef](), tn, llmod);
 
-    run_passes(llmod, optimize, verify, save_temps, output, ot);
+    run_passes(llmod, optimize, false, verify, save_temps, output, ot);
 }
 
 fn create_module_map(@crate_ctxt ccx) -> ValueRef {
@@ -7785,7 +7791,8 @@ fn create_crate_map(@crate_ctxt ccx) -> ValueRef {
 }
 
 fn trans_crate(session.session sess, @ast.crate crate, ty.ctxt tcx,
-               ty.type_cache type_cache, str output, bool shared)
+               ty.type_cache type_cache, str output,
+               bool debuginfo, bool shared)
         -> ModuleRef {
     auto llmod =
         llvm.LLVMModuleCreateWithNameInContext(_str.buf("rust_out"),
@@ -7835,7 +7842,8 @@ fn trans_crate(session.session sess, @ast.crate crate, ty.ctxt tcx,
                     sha = std.sha1.mk_sha1(),
                     type_sha1s = sha1s,
                     type_abbrevs = abbrevs,
-                    tcx = tcx);
+                    tcx = tcx,
+                    debuginfo = debuginfo);
     auto cx = new_local_ctxt(ccx);
 
     create_typedefs(ccx);