Various build fixes

src/duckstation-regtest/regtest_host_interface.cpp

@@ -137,6 +137,8 @@ void RegTestHostInterface::OnSystemPerformanceCountersUpdated() {}
 
 void RegTestHostInterface::OnDisplayInvalidated() {}
 
+void RegTestHostInterface::OnAchievementsRefreshed() {}
+
 std::string RegTestHostInterface::GetStringSettingValue(const char* section, const char* key,
                                                         const char* default_value /*= ""*/)
 {
@@ -163,6 +165,16 @@ std::vector<std::string> RegTestHostInterface::GetSettingStringList(const char*
   return m_settings_interface.GetStringList(section, key);
 }
 
+SettingsInterface* RegTestHostInterface::GetSettingsInterface()
+{
+  return &m_settings_interface;
+}
+
+std::lock_guard<std::recursive_mutex> RegTestHostInterface::GetSettingsLock()
+{
+  return std::lock_guard<std::recursive_mutex>(m_settings_mutex);
+}
+
 void RegTestHostInterface::UpdateSettings()
 {
   SettingsInterface& si = m_settings_interface;