tools/gn/ninja_binary_target_writer.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef TOOLS_GN_NINJA_BINARY_TARGET_WRITER_H_
   6 #define TOOLS_GN_NINJA_BINARY_TARGET_WRITER_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "tools/gn/config_values.h"
  10 #include "tools/gn/ninja_target_writer.h"
  11 #include "tools/gn/toolchain.h"
  12 #include "tools/gn/unique_vector.h"
  13
  14 struct EscapeOptions;
  15
  16 // Writes a .ninja file for a binary target type (an executable, a shared
  17 // library, or a static library).
  18 class NinjaBinaryTargetWriter : public NinjaTargetWriter {
  19  public:
  20   NinjaBinaryTargetWriter(const Target* target, std::ostream& out);
  21   virtual ~NinjaBinaryTargetWriter();
  22
  23   virtual void Run() OVERRIDE;
  24
  25  private:
  26   typedef std::set<OutputFile> OutputFileSet;
  27
  28   void WriteCompilerVars();
  29   void WriteSources(std::vector<OutputFile>* object_files);
  30   void WriteLinkerStuff(const std::vector<OutputFile>& object_files);
  31   void WriteLinkerFlags();
  32   void WriteLibs();
  33   void WriteOutputExtension();
  34   void WriteSolibs(const std::vector<OutputFile>& solibs);
  35
  36   // Writes the stamp line for a source set. These are not linked.
  37   void WriteSourceSetStamp(const std::vector<OutputFile>& object_files);
  38
  39   // Gets all target dependencies and classifies them, as well as accumulates
  40   // object files from source sets we need to link.
  41   void GetDeps(UniqueVector<OutputFile>* extra_object_files,
  42                UniqueVector<const Target*>* linkable_deps,
  43                UniqueVector<const Target*>* non_linkable_deps) const;
  44
  45   // Classifies the dependency as linkable or nonlinkable with the current
  46   // target, adding it to the appropriate vector. If the dependency is a source
  47   // set we should link in, the source set's object files will be appended to
  48   // |extra_object_files|.
  49   void ClassifyDependency(const Target* dep,
  50                           UniqueVector<OutputFile>* extra_object_files,
  51                           UniqueVector<const Target*>* linkable_deps,
  52                           UniqueVector<const Target*>* non_linkable_deps) const;
  53
  54   // Writes the implicit dependencies for the link or stamp line. This is
  55   // the "||" and everything following it on the ninja line.
  56   //
  57   // The order-only dependencies are the non-linkable deps passed in as an
  58   // argument, plus the data file depdencies in the target.
  59   void WriteOrderOnlyDependencies(
  60       const UniqueVector<const Target*>& non_linkable_deps);
  61
  62   // Computes the set of output files resulting from compiling the given source
  63   // file. If the file can be compiled and the tool exists, fills the outputs in
  64   // and writes the tool type to computed_tool_type. If the file is not
  65   // compilable, returns false.
  66   //
  67   // The target that the source belongs to is passed as an argument. In the
  68   // case of linking to source sets, this can be different than the target
  69   // this class is currently writing.
  70   //
  71   // The function can succeed with a "NONE" tool type for object files which are
  72   // just passed to the output. The output will always be overwritten, not
  73   // appended to.
  74   bool GetOutputFilesForSource(const Target* target,
  75                                const SourceFile& source,
  76                                Toolchain::ToolType* computed_tool_type,
  77                                std::vector<OutputFile>* outputs) const;
  78
  79   const Tool* tool_;
  80
  81   DISALLOW_COPY_AND_ASSIGN(NinjaBinaryTargetWriter);
  82 };
  83
  84 #endif  // TOOLS_GN_NINJA_BINARY_TARGET_WRITER_H_
  85