Qt: Fix builds without GDB stub and libpng

src/platform/qt/GameController.cpp

@@ -332,7 +332,7 @@ void GameController::setConfig(const mCoreConfig* config) {
 	}
 }
 
-#ifdef USE_GDB_STUB
+#ifdef USE_DEBUGGERS
 mDebugger* GameController::debugger() {
 	if (!isLoaded()) {
 		return nullptr;
@@ -622,8 +622,9 @@ void GameController::closeGame() {
 	if (!m_gameOpen) {
 		return;
 	}
-
+#ifdef USE_DEBUGGERS
 	setDebugger(nullptr);
+#endif
 	if (mCoreThreadIsPaused(&m_threadContext)) {
 		mCoreThreadUnpause(&m_threadContext);
 	}

src/platform/qt/GameController.h

@@ -86,7 +86,7 @@ public:
 
 	int stateSlot() const { return m_stateSlot; }
 
-#ifdef USE_GDB_STUB
+#ifdef USE_DEBUGGERS
 	mDebugger* debugger();
 	void setDebugger(mDebugger*);
 #endif

src/platform/qt/ObjView.cpp

@@ -51,7 +51,11 @@ ObjView::ObjView(GameController* controller, QWidget* parent)
 	connect(m_ui.magnification, static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), [this]() {
 		updateTiles(true);
 	});
+#ifdef USE_PNG
 	connect(m_ui.exportButton, SIGNAL(clicked()), this, SLOT(exportObj()));
+#else
+	m_ui.exportButton->setVisible(false);
+#endif
 }
 
 void ObjView::selectObj(int obj) {
@@ -242,6 +246,7 @@ void ObjView::updateTilesGB(bool force) {
 }
 #endif
 
+#ifdef USE_PNG
 void ObjView::exportObj() {
 	GameController::Interrupter interrupter(m_controller);
 	QString filename = GBAApp::app()->getSaveFileName(this, tr("Export sprite"),
@@ -282,6 +287,7 @@ void ObjView::exportObj() {
 	PNGWriteClose(png, info);
 	delete[] buffer;
 }
+#endif
 
 bool ObjView::ObjInfo::operator!=(const ObjInfo& other) {
 	return other.tile != tile ||

src/platform/qt/ObjView.h

@@ -21,8 +21,10 @@ Q_OBJECT
 public:
 	ObjView(GameController* controller, QWidget* parent = nullptr);
 
+#ifdef USE_PNG
 public slots:
 	void exportObj();
+#endif
 
 private slots:
 	void selectObj(int);