Method HaveRequiredLanguages

Source/cmCommonTargetGenerator.cxx:576–600

}

bool cmCommonTargetGenerator::HaveRequiredLanguages(
  std::vector<cmSourceFile const*> const& sources,
  std::set<std::string>& languagesNeeded) const
{
  for (cmSourceFile const* sf : sources) {
    languagesNeeded.insert(sf->GetLanguage());
  }

  auto* makefile = this->Makefile;
  auto* state = makefile->GetState();
  auto unary = [&state, &makefile](std::string const& lang) -> bool {
    bool const valid = state->GetLanguageEnabled(lang);
    if (!valid) {
      makefile->IssueMessage(
        MessageType::FATAL_ERROR,
        cmStrCat("The language ", lang,
                 " was requested for compilation but was not enabled."
                 " To enable a language it needs to be specified in a"
                 " 'project' or 'enable_language' command in the root"
                 " CMakeLists.txt"));
    }
    return valid;
  };
  return std::all_of(languagesNeeded.cbegin(), languagesNeeded.cend(), unary);
}