Fix: signals are not allowed to be (pure) virtual functions.

DCLibraries.pri

@@ -45,7 +45,7 @@ gccmain.commands = \
                 -DAPP_EXTENDED_VERSION=\\\"$$EXTENDED_VERSION\\\" \
                 -I. \
                 -I../../DCLibraries/include \
-                -I/opt/ptu5/opt/phytec-yogurt/i.MX6-thud-PCM058-KSP30-ATB-PTU5-2019-10-30/sysroots/cortexa9t2hf-neon-phytec-linux-gnueabi/usr/include/
+                -I$$(QTDIR)/../include
 
 QMAKE_EXTRA_COMPILERS += gccmain
 SOURCES_MAIN += $$PWD/src/main.cpp

include/hwapi.h

@@ -1305,35 +1305,31 @@ public:
 
 
 
-
 signals:
-    void hwapi_templatePrintFinished_OK(void) const override;
-    void hwapi_templatePrintFinished_Err(void) const override;
+    // already declared in interfaces.h
+    void hwapi_templatePrintFinished_OK(void) const;
+    void hwapi_templatePrintFinished_Err(void) const;
 
-    void hwapi_coinCollectionJustStarted(void) const override;
-    void hwapi_coinCollectionAborted(void) const override;
+    void hwapi_coinCollectionJustStarted(void) const;
+    void hwapi_coinCollectionAborted(void) const;
 
-    void hwapi_gotNewCoin(void) const override;
-    void hwapi_payStopByMax(void) const override;
-    void hwapi_payStopByPushbutton(void) const override;
+    void hwapi_gotNewCoin(void) const;
+    void hwapi_payStopByMax(void) const;
+    void hwapi_payStopByPushbutton(void) const;
 
-    void hwapi_payStopByEscrow(void) const override;
-    void hwapi_payStopByError(void) const override;
-    void hwapi_payStopByTimeout(void) const override;
-    void hwapi_payCancelled(void) const override;
-    void hwapi_coinProcessJustStopped(void) const override;
+    void hwapi_payStopByEscrow(void) const;
+    void hwapi_payStopByError(void) const;
+    void hwapi_payStopByTimeout(void) const;
+    void hwapi_payCancelled(void) const;
+    void hwapi_coinProcessJustStopped(void) const;
 
     // new from 2023.06.12
-    void hwapi_doorServiceDoorOpened(void) const override;
-    void hwapi_doorVaultDoorOpened(void) const override;
-    void hwapi_doorCoinBoxRemoved(void) const override;
-    void hwapi_doorCoinBoxInserted(void) const override;
-    void hwapi_doorCBinAndAllDoorsClosed(void) const override;
-    void hwapi_doorAllDoorsClosed(void) const override;
-
-
-
-
+    void hwapi_doorServiceDoorOpened(void) const;
+    void hwapi_doorVaultDoorOpened(void) const;
+    void hwapi_doorCoinBoxRemoved(void) const;
+    void hwapi_doorCoinBoxInserted(void) const;
+    void hwapi_doorCBinAndAllDoorsClosed(void) const;
+    void hwapi_doorAllDoorsClosed(void) const;
 
  private slots:
     //void hwapi_slotPrintFinished_OK(void);