Allow GN toolchains to specify runtime deps outputs.

tools/gn/target.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "tools/gn/target.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 539 matching lines @@
     }
     case EXECUTABLE:
     case LOADABLE_MODULE:
       // Executables and loadable modules don't get linked to, but the first
       // output is used for dependency management.
       CHECK_GE(tool->outputs().list().size(), 1u);
       check_tool_outputs = true;
       dependency_output_file_ =
           SubstitutionWriter::ApplyPatternToLinkerAsOutputFile(
               this, tool, tool->outputs().list()[0]);
+
+      if (tool->runtime_outputs().list().empty()) {
+        // Default to the first output for the runtime output.
+        runtime_outputs_.push_back(dependency_output_file_);
+      } else {
+        SubstitutionWriter::ApplyListToLinkerAsOutputFile(
+            this, tool, tool->runtime_outputs(), &runtime_outputs_);
+      }
       break;
     case STATIC_LIBRARY:
       // Static libraries both have dependencies and linking going off of the
       // first output.
       CHECK(tool->outputs().list().size() >= 1);
       check_tool_outputs = true;
       link_output_file_ = dependency_output_file_ =
           SubstitutionWriter::ApplyPatternToLinkerAsOutputFile(
               this, tool, tool->outputs().list()[0]);
       break;
@@ skipping 11 matching lines @@
           link_output_file_ =
               SubstitutionWriter::ApplyPatternToLinkerAsOutputFile(
                   this, tool, tool->link_output());
         }
         if (!tool->depend_output().empty()) {
           dependency_output_file_ =
               SubstitutionWriter::ApplyPatternToLinkerAsOutputFile(
                   this, tool, tool->depend_output());
         }
       }
-      if (tool->runtime_link_output().empty()) {
-        runtime_link_output_file_ = link_output_file_;
+      if (tool->runtime_outputs().list().empty()) {
+        // Default to the link output for the runtime output.
+        runtime_outputs_.push_back(link_output_file_);
       } else {
-          runtime_link_output_file_ =
-              SubstitutionWriter::ApplyPatternToLinkerAsOutputFile(
-                  this, tool, tool->runtime_link_output());
+        SubstitutionWriter::ApplyListToLinkerAsOutputFile(
+            this, tool, tool->runtime_outputs(), &runtime_outputs_);
       }
       break;
     case UNKNOWN:
     default:
       NOTREACHED();
   }
 
   // Count anything generated from bundle_data dependencies.
   if (output_type_ == CREATE_BUNDLE)
     bundle_data_.GetOutputFiles(settings(), &computed_outputs_);
@@ skipping 154 matching lines @@
     check_data_deps = g_scheduler->IsFileGeneratedByWriteRuntimeDeps(out_file);
     // Check object files (much slower and very rare) only if the "normal"
     // output check failed.
     consider_object_files = !check_data_deps;
     if (!EnsureFileIsGeneratedByDependency(this, out_file, true,
                                            consider_object_files,
                                            check_data_deps, &seen_targets))
       g_scheduler->AddUnknownGeneratedInput(this, source);
   }
 }