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// 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_NINJA_BINARY_TARGET_WRITER_H_
#define TOOLS_GN_NINJA_BINARY_TARGET_WRITER_H_
#include "base/macros.h"
#include "tools/gn/config_values.h"
#include "tools/gn/ninja_target_writer.h"
#include "tools/gn/toolchain.h"
#include "tools/gn/unique_vector.h"
struct EscapeOptions;
class SourceFileTypeSet;
// Writes a .ninja file for a binary target type (an executable, a shared
// library, or a static library).
class NinjaBinaryTargetWriter : public NinjaTargetWriter {
public:
class SourceFileTypeSet;
NinjaBinaryTargetWriter(const Target* target, std::ostream& out);
~NinjaBinaryTargetWriter() override;
void Run() override;
private:
typedef std::set<OutputFile> OutputFileSet;
// Writes all flags for the compiler: includes, defines, cflags, etc.
void WriteCompilerVars(const SourceFileTypeSet& used_types);
// Writes to the output stream a stamp rule for inputs, and
// returns the file to be appended to source rules that encodes the
// implicit dependencies for the current target. The returned OutputFile
// will be empty if there are no inputs.
OutputFile WriteInputsStampAndGetDep() const;
// Writes build lines required for precompiled headers. Any generated
// object files will be appended to the |object_files|. Any generated
// non-object files (for instance, .gch files from a GCC toolchain, are
// appended to |other_files|).
//
// input_dep is the stamp file collecting the dependencies required before
// compiling this target. It will be empty if there are no input deps.
void WritePCHCommands(const SourceFileTypeSet& used_types,
const OutputFile& input_dep,
const std::vector<OutputFile>& order_only_deps,
std::vector<OutputFile>* object_files,
std::vector<OutputFile>* other_files);
// Writes a .pch compile build line for a language type.
void WritePCHCommand(SubstitutionType flag_type,
Toolchain::ToolType tool_type,
Tool::PrecompiledHeaderType header_type,
const OutputFile& input_dep,
const std::vector<OutputFile>& order_only_deps,
std::vector<OutputFile>* object_files,
std::vector<OutputFile>* other_files);
void WriteGCCPCHCommand(SubstitutionType flag_type,
Toolchain::ToolType tool_type,
const OutputFile& input_dep,
const std::vector<OutputFile>& order_only_deps,
std::vector<OutputFile>* gch_files);
void WriteWindowsPCHCommand(SubstitutionType flag_type,
Toolchain::ToolType tool_type,
const OutputFile& input_dep,
const std::vector<OutputFile>& order_only_deps,
std::vector<OutputFile>* object_files);
// pch_deps are additional dependencies to run before the rule. They are
// expected to abide by the naming conventions specified by GetPCHOutputFiles.
//
// order_only_dep are the dependencies that must be run before doing any
// compiles.
//
// The files produced by the compiler will be added to two output vectors.
void WriteSources(const std::vector<OutputFile>& pch_deps,
const OutputFile& input_dep,
const std::vector<OutputFile>& order_only_deps,
std::vector<OutputFile>* object_files,
std::vector<SourceFile>* other_files);
// Writes a build line.
void WriteCompilerBuildLine(const SourceFile& source,
const std::vector<OutputFile>& extra_deps,
const std::vector<OutputFile>& order_only_deps,
Toolchain::ToolType tool_type,
const std::vector<OutputFile>& outputs);
void WriteLinkerStuff(const std::vector<OutputFile>& object_files,
const std::vector<SourceFile>& other_files,
const OutputFile& input_dep);
void WriteLinkerFlags(const SourceFile* optional_def_file);
void WriteLibs();
void WriteOutputSubstitutions();
void WriteSolibs(const std::vector<OutputFile>& solibs);
// Writes the stamp line for a source set. These are not linked.
void WriteSourceSetStamp(const std::vector<OutputFile>& object_files);
// Gets all target dependencies and classifies them, as well as accumulates
// object files from source sets we need to link.
void GetDeps(UniqueVector<OutputFile>* extra_object_files,
UniqueVector<const Target*>* linkable_deps,
UniqueVector<const Target*>* non_linkable_deps) const;
// Classifies the dependency as linkable or nonlinkable with the current
// target, adding it to the appropriate vector. If the dependency is a source
// set we should link in, the source set's object files will be appended to
// |extra_object_files|.
void ClassifyDependency(const Target* dep,
UniqueVector<OutputFile>* extra_object_files,
UniqueVector<const Target*>* linkable_deps,
UniqueVector<const Target*>* non_linkable_deps) const;
// Writes the implicit dependencies for the link or stamp line. This is
// the "||" and everything following it on the ninja line.
//
// The order-only dependencies are the non-linkable deps passed in as an
// argument, plus the data file depdencies in the target.
void WriteOrderOnlyDependencies(
const UniqueVector<const Target*>& non_linkable_deps);
// Checks for duplicates in the given list of output files. If any duplicates
// are found, throws an error and return false.
bool CheckForDuplicateObjectFiles(const std::vector<OutputFile>& files) const;
const Tool* tool_;
// Cached version of the prefix used for rule types for this toolchain.
std::string rule_prefix_;
DISALLOW_COPY_AND_ASSIGN(NinjaBinaryTargetWriter);
};
#endif // TOOLS_GN_NINJA_BINARY_TARGET_WRITER_H_
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