Method GetPchFile

Source/cmGeneratorTarget.cxx:3204–3261

}

std::string cmGeneratorTarget::GetPchFile(std::string const& config,
                                          std::string const& language,
                                          std::string const& arch)
{
  auto const inserted =
    this->PchFiles.insert(std::make_pair(language + config + arch, ""));
  if (inserted.second) {
    std::string& pchFile = inserted.first->second;

    std::string const pchExtension =
      this->Makefile->GetSafeDefinition("CMAKE_PCH_EXTENSION");

    if (this->Makefile->IsOn("CMAKE_LINK_PCH")) {
      auto replaceExtension = [](std::string const& str,
                                 std::string const& ext) -> std::string {
        auto dot_pos = str.rfind('.');
        std::string result;
        if (dot_pos != std::string::npos) {
          result = str.substr(0, dot_pos);
        }
        result += ext;
        return result;
      };

      cmGeneratorTarget* generatorTarget = this;
      cmGeneratorTarget* reuseTarget = this->GetPchReuseTarget();
      if (reuseTarget) {
        generatorTarget = reuseTarget;
      }

      std::string const pchFileObject =
        generatorTarget->GetPchFileObject(config, language, arch);
      if (!pchExtension.empty()) {
        pchFile = replaceExtension(pchFileObject, pchExtension);
      }
    } else {
      if (this->GetUseShortObjectNames() && !pchExtension.empty()) {
        auto pchSource = this->GetPchSource(config, language, arch);
        auto* pchSf = this->Makefile->GetOrCreateSource(
          pchSource, false, cmSourceFileLocationKind::Known);
        pchSf->SetSpecialSourceType(
          cmSourceFile::SpecialSourceType::PchSource);
        pchSf->ResolveFullPath();
        std::string cfgSubdir;
        if (this->GetGlobalGenerator()->IsMultiConfig()) {
          cfgSubdir = cmStrCat(config, '/');
        }
        pchFile = cmStrCat(
          this->GetSupportDirectory(), '/', cfgSubdir,
          this->LocalGenerator->GetShortObjectFileName(*pchSf), pchExtension);
      } else {
        pchFile =
          cmStrCat(this->GetPchHeader(config, language, arch), pchExtension);
      }
    }
  }
  return inserted.first->second;
}