Method HandleDeleteCacheVariables

Source/cmake.cxx:2317–2371

};

int cmake::HandleDeleteCacheVariables(std::string const& var)
{
  cmList argsSplit{ var, cmList::EmptyElements::Yes };
  // erase the property to avoid infinite recursion
  this->State->SetGlobalProperty("__CMAKE_DELETE_CACHE_CHANGE_VARS_", "");
  if (this->GetIsInTryCompile()) {
    return 0;
  }
  std::vector<SaveCacheEntry> saved;
  std::ostringstream warning;
  warning
    << "You have changed variables that require your cache to be deleted.\n"
       "Configure will be re-run and you may have to reset some variables.\n"
       "The following variables have changed:\n";
  for (auto i = argsSplit.begin(); i != argsSplit.end(); ++i) {
    SaveCacheEntry save;
    save.key = *i;
    warning << *i << "= ";
    i++;
    if (i != argsSplit.end()) {
      save.value = *i;
      warning << *i << '\n';
    } else {
      warning << '\n';
      i -= 1;
    }
    cmValue existingValue = this->State->GetCacheEntryValue(save.key);
    if (existingValue) {
      save.type = this->State->GetCacheEntryType(save.key);
      if (cmValue help =
            this->State->GetCacheEntryProperty(save.key, "HELPSTRING")) {
        save.help = *help;
      }
    } else {
      save.type = cmStateEnums::CacheEntryType::UNINITIALIZED;
    }
    saved.push_back(std::move(save));
  }

  // remove the cache
  this->DeleteCache(this->GetHomeOutputDirectory());
  // load the empty cache
  this->LoadCache();
  // restore the changed compilers
  for (SaveCacheEntry const& i : saved) {
    this->AddCacheEntry(i.key, i.value, i.help, i.type);
  }
  cmSystemTools::Message(warning.str());
  // avoid reconfigure if there were errors
  if (!cmSystemTools::GetErrorOccurredFlag()) {
    // re-run configure
    return this->Configure();
  }
  return 0;
}

int cmake::Configure()
{