gn: Support build directories outside the source tree.

tools/gn/binary_target_generator.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/binary_target_generator.h"
 
 #include "tools/gn/config_values_generator.h"
 #include "tools/gn/deps_iterator.h"
 #include "tools/gn/err.h"
 #include "tools/gn/functions.h"
 #include "tools/gn/scope.h"
+#include "tools/gn/settings.h"
 #include "tools/gn/value_extractors.h"
 #include "tools/gn/variables.h"
 
 BinaryTargetGenerator::BinaryTargetGenerator(
     Target* target,
     Scope* scope,
     const FunctionCallNode* function_call,
     Target::OutputType type,
     Err* err)
     : TargetGenerator(target, scope, function_call, err),
@@ skipping 83 matching lines @@
   return true;
 }
 
 bool BinaryTargetGenerator::FillAllowCircularIncludesFrom() {
   const Value* value = scope_->GetValue(
       variables::kAllowCircularIncludesFrom, true);
   if (!value)
     return true;
 
   UniqueVector<Label> circular;
-  ExtractListOfUniqueLabels(*value, scope_->GetSourceDir(),
+  ExtractListOfUniqueLabels(scope_->settings()->build_settings(), *value,
+                            scope_->GetSourceDir(),
                             ToolchainLabelForScope(scope_), &circular, err_);
   if (err_->has_error())
     return false;
 
   // Validate that all circular includes entries are in the deps.
   for (const auto& cur : circular) {
     bool found_dep = false;
     for (const auto& dep_pair : target_->GetDeps(Target::DEPS_LINKED)) {
       if (dep_pair.label == cur) {
         found_dep = true;
         break;
       }
     }
     if (!found_dep) {
       *err_ = Err(*value, "Label not in deps.",
           "The label \"" + cur.GetUserVisibleName(false) +
           "\"\nwas not in the deps of this target. "
           "allow_circular_includes_from only allows\ntargets present in the "
           "deps.");
       return false;
     }
   }
 
   // Add to the set.
   for (const auto& cur : circular)
     target_->allow_circular_includes_from().insert(cur);
   return true;
 }