Method ComputeCompileFeatures

Source/cmGeneratorTarget.cxx:3451–3501

}

bool cmGeneratorTarget::ComputeCompileFeatures(std::string const& config)
{
  cmStandardLevelResolver standardResolver(this->Makefile);

  for (std::string const& lang :
       this->Makefile->GetState()->GetEnabledLanguages()) {
    if (cmValue languageStd = this->GetLanguageStandard(lang, config)) {
      if (cm::optional<cmStandardLevel> langLevel =
            standardResolver.LanguageStandardLevel(lang, *languageStd)) {
        this->UpdateExplicitStandardLevel(lang, config, *langLevel);
      }
    }
  }

  // Compute the language standard based on the compile features.
  std::vector<BT<std::string>> features = this->GetCompileFeatures(config);
  for (BT<std::string> const& f : features) {
    std::string lang;
    if (!standardResolver.CompileFeatureKnown(this->Target->GetName(), f.Value,
                                              lang, nullptr)) {
      return false;
    }

    std::string key = cmStrCat(cmSystemTools::UpperCase(config), '-', lang);
    cmValue currentLanguageStandard = this->GetLanguageStandard(lang, config);

    cm::optional<cmStandardLevel> featureLevel;
    std::string newRequiredStandard;
    if (!standardResolver.GetNewRequiredStandard(
          this->Target->GetName(), f.Value, currentLanguageStandard,
          featureLevel, newRequiredStandard)) {
      return false;
    }

    if (featureLevel) {
      this->UpdateExplicitStandardLevel(lang, config, *featureLevel);
    }

    if (!newRequiredStandard.empty()) {
      BTs<std::string>& languageStandardProperty =
        this->LanguageStandardMap[key];
      if (languageStandardProperty.Value != newRequiredStandard) {
        languageStandardProperty.Value = newRequiredStandard;
        languageStandardProperty.Backtraces.clear();
      }
      languageStandardProperty.Backtraces.emplace_back(f.Backtrace);
    }
  }

  return true;
}

bool cmGeneratorTarget::ComputeCompileFeatures(
  std::string const& config, std::set<LanguagePair> const& languagePairs)