--- emuopt.cpp	2017-02-12 13:23:51.059819191 +0100
+++ emuopt.cpp	2017-03-07 01:57:07.400869534 +0100
@@ -53,6 +53,13 @@
 QStringList optionChoices;
 QString optionPart;
 QString optionRelativeTo;
+// String literals for QString::compare()
+static const QString s_true = QStringLiteral("true");
+static const QString s_false = QStringLiteral("false");
+static const QString s_combo = QStringLiteral("combo");
+static const QString s_choice = QStringLiteral("choice");
+static const QString s_file = QStringLiteral("file");
+static const QString s_emulatorWorkingDirectory = QStringLiteral("emulatorWorkingDirectory");
 
 #if defined(_MIN)
 #undef _MIN
@@ -514,7 +521,7 @@
 				optionType = subItem->text(1);
 		}
 		if ( optionType == "bool" )
-			defaultValue = defaultValue == tr("true") ? "true" : "false";
+			defaultValue = defaultValue == tr("true") ? s_true : s_false;
 		if ( qmc2Config->group() == settingsGroup ) {
 			qmc2Config->endGroup();
 			if ( qmc2Config->contains(QMC2_EMULATOR_PREFIX + "Configuration/Global/" + optionName) )
@@ -543,9 +550,9 @@
 			case QMC2_EMUOPT_TYPE_BOOL: {
 				QCheckBox *checkBoxEditor = static_cast<QCheckBox*>(editor);
 				if ( checkBoxEditor->isChecked() )
-					currentValue = "true";
+					currentValue = s_true;
 				else
-					currentValue = "false";
+					currentValue = s_false;
 				break;
 			}
 			case QMC2_EMUOPT_TYPE_INT: {
@@ -1201,7 +1208,7 @@
 			if ( xmlReader->isStartElement() ) {
 				QString elementType(xmlReader->name().toString());
 				if ( choiceEntity.compare(elementType) == 0 ) {
-					if ( xmlReader->attributes().value("ignore").compare("true") != 0 && xmlReader->attributes().value(ignoreOS).compare("true") != 0 )
+					if ( xmlReader->attributes().value("ignore").compare(s_true) != 0 && xmlReader->attributes().value(ignoreOS).compare(s_true) != 0 )
 						validChoices.append(xmlReader->attributes().value("name").toString());
 				} else
 					readNext = false;
@@ -1257,9 +1264,9 @@
 					if ( sectionEntity.compare(elementType) == 0 ) {
 						bool ignore = false;
 						if ( xmlReader.attributes().hasAttribute("ignore") )
-							ignore = xmlReader.attributes().value("ignore").compare("true") == 0;
+							ignore = xmlReader.attributes().value("ignore").compare(s_true) == 0;
 						if ( xmlReader.attributes().hasAttribute(ignoreOS) )
-							ignore |= xmlReader.attributes().value(ignoreOS).compare("true") == 0;
+							ignore |= xmlReader.attributes().value(ignoreOS).compare(s_true) == 0;
 						if ( !ignore ) {
 							sectionTitle = readDescription(&xmlReader, lang, &readNext);
 							templateMap[sectionTitle].clear();
@@ -1272,14 +1279,14 @@
 						bool wip = false;
 						int decimals = QMC2_EMUOPT_DFLT_DECIMALS;
 						if ( xmlReader.attributes().hasAttribute("ignore") )
-							ignore = xmlReader.attributes().value("ignore").compare("true") == 0;
+							ignore = xmlReader.attributes().value("ignore").compare(s_true) == 0;
 						if ( xmlReader.attributes().hasAttribute(ignoreOS) )
-							ignore |= xmlReader.attributes().value(ignoreOS).compare("true") == 0;
+							ignore |= xmlReader.attributes().value(ignoreOS).compare(s_true) == 0;
 						if ( xmlReader.attributes().hasAttribute("wip") )
-							wip = xmlReader.attributes().value("wip").compare("true") == 0;
+							wip = xmlReader.attributes().value("wip").compare(s_true) == 0;
 						if ( !ignore ) {
 							if ( xmlReader.attributes().hasAttribute("visible") )
-								visible = xmlReader.attributes().value("visible").compare("true") == 0;
+								visible = xmlReader.attributes().value("visible").compare(s_true) == 0;
 							if ( xmlReader.attributes().hasAttribute("decimals") )
 								decimals = xmlReader.attributes().value("decimals").toString().toInt();
 							QString type(xmlReader.attributes().value("type").toString());
@@ -1290,17 +1297,17 @@
 								defaultValue = xmlReader.attributes().value("default").toString();
 							QString optionDescription(readDescription(&xmlReader, lang, &readNext));
 							optionChoices.clear();
-							if ( type.compare("combo") == 0 && xmlReader.name().compare("choice") == 0 )
+							if ( type.compare(s_combo) == 0 && xmlReader.name().compare(s_choice) == 0 )
 								optionChoices = readChoices(&xmlReader);
 							optionPart.clear();
 							optionRelativeTo.clear();
-							if ( type.compare("file") == 0 ) {
+							if ( type.compare(s_file) == 0 ) {
 								if ( xmlReader.attributes().hasAttribute("part") )
 									optionPart = xmlReader.attributes().value("part").toString();
 								if ( xmlReader.attributes().hasAttribute("relativeTo") )
 									optionRelativeTo = xmlReader.attributes().value("relativeTo").toString();
 								if ( !optionRelativeTo.isEmpty() ) {
-									if ( optionRelativeTo.compare("emulatorWorkingDirectory") == 0 )
+									if ( optionRelativeTo.compare(s_emulatorWorkingDirectory) == 0 )
 										optionDescription.append(" (" + tr("relative to the emulator's working directory") + ")");
 									else
 										optionDescription.append(" (" + tr("relative to the path specified in '%1'").arg(optionRelativeTo) + ")");
@@ -1507,7 +1514,7 @@
 						break;
 					case QMC2_EMUOPT_TYPE_BOOL: {
 						assumedType = "bool";
-						QString emuOpt(emuOptions[option.name] == "0" ? "false" : (emuOptions[option.name] == "1" ? "true" : emuOptions[option.name]));
+						QString emuOpt(emuOptions[option.name] == "0" ? s_false : (emuOptions[option.name] == "1" ? s_true : emuOptions[option.name]));
 						if ( option.dvalue != emuOpt ) {
 							diffCount++;
 							if ( qmc2TemplateCheck ) {