Allow .o files for GN generated inputs.

tools/gn/target.h

 // 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.
 
 #ifndef TOOLS_GN_TARGET_H_
 #define TOOLS_GN_TARGET_H_
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/gtest_prod_util.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "tools/gn/action_values.h"
 #include "tools/gn/config_values.h"
 #include "tools/gn/inherited_libraries.h"
 #include "tools/gn/item.h"
 #include "tools/gn/label_ptr.h"
 #include "tools/gn/lib_file.h"
 #include "tools/gn/ordered_set.h"
 #include "tools/gn/output_file.h"
 #include "tools/gn/source_file.h"
+#include "tools/gn/toolchain.h"
 #include "tools/gn/unique_vector.h"
 
 class DepsIteratorRange;
 class InputFile;
 class Settings;
 class Token;
 class Toolchain;
 
 class Target : public Item {
  public:
@@ skipping 25 matching lines @@
   static const char* GetStringForOutputType(OutputType type);
 
   // Item overrides.
   Target* AsTarget() override;
   const Target* AsTarget() const override;
   bool OnResolved(Err* err) override;
 
   OutputType output_type() const { return output_type_; }
   void set_output_type(OutputType t) { output_type_ = t; }
 
+  // True for targets that compile source code (all types of libaries and
+  // executables).
+  bool IsBinary() const;
+
   // Can be linked into other targets.
   bool IsLinkable() const;
 
   // True if the target links dependencies rather than propogated up the graph.
   // This is also true of action and copy steps even though they don't link
   // dependencies, because they also don't propogate libraries up.
   bool IsFinal() const;
 
   // Will be the empty string to use the target label as the output name.
   // See GetComputedOutputName().
@@ skipping 159 matching lines @@
   // These are only known once the target is resolved and will be empty before
   // that. This is a cache of the files to prevent every target that depends on
   // a given library from recomputing the same pattern.
   const OutputFile& link_output_file() const {
     return link_output_file_;
   }
   const OutputFile& dependency_output_file() const {
     return dependency_output_file_;
   }
 
+  // Computes the set of output files resulting from compiling the given source
+  // file. If the file can be compiled and the tool exists, fills the outputs
+  // in and writes the tool type to computed_tool_type. If the file is not
+  // compilable, returns false.
+  //
+  // The function can succeed with a "NONE" tool type for object files which
+  // are just passed to the output. The output will always be overwritten, not
+  // appended to.
+  bool GetOutputFilesForSource(const SourceFile& source,
+                               Toolchain::ToolType* computed_tool_type,
+                               std::vector<OutputFile>* outputs) const;
+
  private:
   FRIEND_TEST_ALL_PREFIXES(Target, ResolvePrecompiledHeaders);
 
   // Pulls necessary information from dependencies to this one when all
   // dependencies have been resolved.
   void PullDependentTargetConfigsFrom(const Target* dep);
   void PullDependentTargetConfigs();
   void PullDependentTargetLibsFrom(const Target* dep, bool is_public);
   void PullDependentTargetLibs();
   void PullRecursiveHardDeps();
@@ skipping 62 matching lines @@
 
   // Output files. Empty until the target is resolved.
   std::vector<OutputFile> computed_outputs_;
   OutputFile link_output_file_;
   OutputFile dependency_output_file_;
 
   DISALLOW_COPY_AND_ASSIGN(Target);
 };
 
 #endif  // TOOLS_GN_TARGET_H_