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/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   file Copyright.txt or https://cmake.org/licensing for details.  */
#include "cmCommonTargetGenerator.h"

#include <set>
#include <sstream>
#include <utility>

#include "cmAlgorithms.h"
#include "cmComputeLinkInformation.h"
#include "cmGeneratorTarget.h"
#include "cmGlobalCommonGenerator.h"
#include "cmLinkLineComputer.h"
#include "cmLocalCommonGenerator.h"
#include "cmLocalGenerator.h"
#include "cmMakefile.h"
#include "cmOutputConverter.h"
#include "cmSourceFile.h"
#include "cmStateTypes.h"

cmCommonTargetGenerator::cmCommonTargetGenerator(cmGeneratorTarget* gt)
  : GeneratorTarget(gt)
  , Makefile(gt->Makefile)
  , LocalCommonGenerator(
      static_cast<cmLocalCommonGenerator*>(gt->LocalGenerator))
  , GlobalCommonGenerator(static_cast<cmGlobalCommonGenerator*>(
      gt->LocalGenerator->GetGlobalGenerator()))
  , ConfigName(LocalCommonGenerator->GetConfigName())
{
}

cmCommonTargetGenerator::~cmCommonTargetGenerator()
{
}

std::string const& cmCommonTargetGenerator::GetConfigName() const
{
  return this->ConfigName;
}

const char* cmCommonTargetGenerator::GetFeature(const std::string& feature)
{
  return this->GeneratorTarget->GetFeature(feature, this->ConfigName);
}

void cmCommonTargetGenerator::AddModuleDefinitionFlag(
  cmLinkLineComputer* linkLineComputer, std::string& flags)
{
  cmGeneratorTarget::ModuleDefinitionInfo const* mdi =
    this->GeneratorTarget->GetModuleDefinitionInfo(this->GetConfigName());
  if (!mdi || mdi->DefFile.empty()) {
    return;
  }

  // TODO: Create a per-language flag variable.
  const char* defFileFlag =
    this->Makefile->GetDefinition("CMAKE_LINK_DEF_FILE_FLAG");
  if (!defFileFlag) {
    return;
  }

  // Append the flag and value.  Use ConvertToLinkReference to help
  // vs6's "cl -link" pass it to the linker.
  std::string flag = defFileFlag;
  flag += this->LocalCommonGenerator->ConvertToOutputFormat(
    linkLineComputer->ConvertToLinkReference(mdi->DefFile),
    cmOutputConverter::SHELL);
  this->LocalCommonGenerator->AppendFlags(flags, flag);
}

void cmCommonTargetGenerator::AppendFortranFormatFlags(
  std::string& flags, cmSourceFile const& source)
{
  const char* srcfmt = source.GetProperty("Fortran_FORMAT");
  cmOutputConverter::FortranFormat format =
    cmOutputConverter::GetFortranFormat(srcfmt);
  if (format == cmOutputConverter::FortranFormatNone) {
    const char* tgtfmt = this->GeneratorTarget->GetProperty("Fortran_FORMAT");
    format = cmOutputConverter::GetFortranFormat(tgtfmt);
  }
  const char* var = nullptr;
  switch (format) {
    case cmOutputConverter::FortranFormatFixed:
      var = "CMAKE_Fortran_FORMAT_FIXED_FLAG";
      break;
    case cmOutputConverter::FortranFormatFree:
      var = "CMAKE_Fortran_FORMAT_FREE_FLAG";
      break;
    default:
      break;
  }
  if (var) {
    this->LocalCommonGenerator->AppendFlags(
      flags, this->Makefile->GetDefinition(var));
  }
}

std::string cmCommonTargetGenerator::GetFlags(const std::string& l)
{
  ByLanguageMap::iterator i = this->FlagsByLanguage.find(l);
  if (i == this->FlagsByLanguage.end()) {
    std::string flags;

    this->LocalCommonGenerator->GetTargetCompileFlags(
      this->GeneratorTarget, this->ConfigName, l, flags);

    ByLanguageMap::value_type entry(l, flags);
    i = this->FlagsByLanguage.insert(entry).first;
  }
  return i->second;
}

std::string cmCommonTargetGenerator::GetDefines(const std::string& l)
{
  ByLanguageMap::iterator i = this->DefinesByLanguage.find(l);
  if (i == this->DefinesByLanguage.end()) {
    std::set<std::string> defines;
    this->LocalCommonGenerator->GetTargetDefines(this->GeneratorTarget,
                                                 this->ConfigName, l, defines);

    std::string definesString;
    this->LocalCommonGenerator->JoinDefines(defines, definesString, l);

    ByLanguageMap::value_type entry(l, definesString);
    i = this->DefinesByLanguage.insert(entry).first;
  }
  return i->second;
}

std::string cmCommonTargetGenerator::GetIncludes(std::string const& l)
{
  ByLanguageMap::iterator i = this->IncludesByLanguage.find(l);
  if (i == this->IncludesByLanguage.end()) {
    std::string includes;
    this->AddIncludeFlags(includes, l);
    ByLanguageMap::value_type entry(l, includes);
    i = this->IncludesByLanguage.insert(entry).first;
  }
  return i->second;
}

std::vector<std::string> cmCommonTargetGenerator::GetLinkedTargetDirectories()
  const
{
  std::vector<std::string> dirs;
  std::set<cmGeneratorTarget const*> emitted;
  if (cmComputeLinkInformation* cli =
        this->GeneratorTarget->GetLinkInformation(this->ConfigName)) {
    cmComputeLinkInformation::ItemVector const& items = cli->GetItems();
    for (auto const& item : items) {
      cmGeneratorTarget const* linkee = item.Target;
      if (linkee && !linkee->IsImported()
          // We can ignore the INTERFACE_LIBRARY items because
          // Target->GetLinkInformation already processed their
          // link interface and they don't have any output themselves.
          && linkee->GetType() != cmStateEnums::INTERFACE_LIBRARY &&
          emitted.insert(linkee).second) {
        cmLocalGenerator* lg = linkee->GetLocalGenerator();
        std::string di = lg->GetCurrentBinaryDirectory();
        di += "/";
        di += lg->GetTargetDirectory(linkee);
        dirs.push_back(std::move(di));
      }
    }
  }
  return dirs;
}

std::string cmCommonTargetGenerator::ComputeTargetCompilePDB() const
{
  std::string compilePdbPath;
  if (this->GeneratorTarget->GetType() > cmStateEnums::OBJECT_LIBRARY) {
    return compilePdbPath;
  }
  compilePdbPath =
    this->GeneratorTarget->GetCompilePDBPath(this->GetConfigName());
  if (compilePdbPath.empty()) {
    // Match VS default: `$(IntDir)vc$(PlatformToolsetVersion).pdb`.
    // A trailing slash tells the toolchain to add its default file name.
    compilePdbPath = this->GeneratorTarget->GetSupportDirectory() + "/";
    if (this->GeneratorTarget->GetType() == cmStateEnums::STATIC_LIBRARY) {
      // Match VS default for static libs: `$(IntDir)$(ProjectName).pdb`.
      compilePdbPath += this->GeneratorTarget->GetName();
      compilePdbPath += ".pdb";
    }
  }

  return compilePdbPath;
}

std::string cmCommonTargetGenerator::GetManifests()
{
  std::vector<cmSourceFile const*> manifest_srcs;
  this->GeneratorTarget->GetManifests(manifest_srcs, this->ConfigName);

  std::vector<std::string> manifests;
  manifests.reserve(manifest_srcs.size());
  for (cmSourceFile const* manifest_src : manifest_srcs) {
    manifests.push_back(this->LocalCommonGenerator->ConvertToOutputFormat(
      this->LocalCommonGenerator->ConvertToRelativePath(
        this->LocalCommonGenerator->GetWorkingDirectory(),
        manifest_src->GetFullPath()),
      cmOutputConverter::SHELL));
  }

  return cmJoin(manifests, " ");
}

void cmCommonTargetGenerator::AppendOSXVerFlag(std::string& flags,
                                               const std::string& lang,
                                               const char* name, bool so)
{
  // Lookup the flag to specify the version.
  std::string fvar = "CMAKE_";
  fvar += lang;
  fvar += "_OSX_";
  fvar += name;
  fvar += "_VERSION_FLAG";
  const char* flag = this->Makefile->GetDefinition(fvar);

  // Skip if no such flag.
  if (!flag) {
    return;
  }

  // Lookup the target version information.
  int major;
  int minor;
  int patch;
  this->GeneratorTarget->GetTargetVersion(so, major, minor, patch);
  if (major > 0 || minor > 0 || patch > 0) {
    // Append the flag since a non-zero version is specified.
    std::ostringstream vflag;
    vflag << flag << major << "." << minor << "." << patch;
    this->LocalCommonGenerator->AppendFlags(flags, vflag.str());
  }
}