Method AddRequiredTargetFeature

Source/cmStandardLevelResolver.cxx:559–592

}

bool cmStandardLevelResolver::AddRequiredTargetFeature(
  cmTarget* target, std::string const& feature, std::string* error) const
{
  if (cmGeneratorExpression::Find(feature) != std::string::npos) {
    target->AppendProperty("COMPILE_FEATURES", feature,
                           this->Makefile->GetBacktrace());
    return true;
  }

  std::string lang;
  if (!this->CheckCompileFeaturesAvailable(target->GetName(), feature, lang,
                                           error)) {
    return false;
  }

  target->AppendProperty("COMPILE_FEATURES", feature,
                         this->Makefile->GetBacktrace());

  // FIXME: Add a policy to avoid updating the <LANG>_STANDARD target
  // property due to COMPILE_FEATURES.  The language standard selection
  // should be done purely at generate time based on whatever the project
  // code put in these properties explicitly.  That is mostly true now,
  // but for compatibility we need to continue updating the property here.
  cm::optional<cmStandardLevel> featureLevel;
  std::string newRequiredStandard;
  bool succeeded = this->GetNewRequiredStandard(
    target->GetName(), feature,
    target->GetProperty(cmStrCat(lang, "_STANDARD")), featureLevel,
    newRequiredStandard, error);
  if (!newRequiredStandard.empty()) {
    target->SetProperty(cmStrCat(lang, "_STANDARD"), newRequiredStandard);
  }
  return succeeded;
}

bool cmStandardLevelResolver::CheckCompileFeaturesAvailable(
  std::string const& targetName, std::string const& feature, std::string& lang,