diff --git a/UpdatePTUDevCtrl.pro b/UpdatePTUDevCtrl.pro
index 25f3e57..1ad6214 100644
--- a/UpdatePTUDevCtrl.pro
+++ b/UpdatePTUDevCtrl.pro
@@ -8,24 +8,41 @@ TARGET = up_dev_ctrl
 CONFIG += c++11
 # CONFIG -= app_bundle
 
+# DEFINES+=LinuxDesktop
+
 QMAKE_CXXFLAGS += -Wno-deprecated-copy
 
 # You can make your code fail to compile if it uses deprecated APIs.
 # In order to do so, uncomment the following line.
 #DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0
 
+contains( CONFIG, PTU5 ) {
+    greaterThan(QT_MAJOR_VERSION, 4): QT += serialport
+    CONFIG += link_pkgconfig
+    lessThan(QT_MAJOR_VERSION, 5):   PKGCONFIG += qextserialport
+    QMAKE_CXXFLAGS += -std=c++11   # for GCC >= 4.7
+    QMAKE_CXXFLAGS += -Wno-deprecated-copy
+    ARCH = PTU5
+    DEFINES+=PTU5
+}
+contains( CONFIG, DesktopLinux ) {
+    greaterThan(QT_MAJOR_VERSION, 4): QT += serialport
+    lessThan(QT_MAJOR_VERSION, 5):    CONFIG += extserialport
+    # QMAKE_CC = ccache $$QMAKE_CC
+    # QMAKE_CXX = ccache $$QMAKE_CXX
+    QMAKE_CXXFLAGS += -std=c++11
+    QMAKE_CXXFLAGS += -Wno-deprecated-copy
+    linux-clang {  QMAKE_CXXFLAGS += -Qunused-arguments   }
+    ARCH = DesktopLinux
+    DEFINES+=DesktopLinux
+}
+
 SOURCES += \
         main.cpp \
-        message_handler.cpp \
-        load_dc_plugin.cpp \
-        commands_to_update_dc.cpp \
-        serial.cpp
+        message_handler.cpp
 
 HEADERS += \
         message_handler.h \
-        load_dc_plugin.h \
-        commands_to_update_dc.h \
-        serial.h \
         plugins/interfaces.h
 
 # https://blog.developer.atlassian.com/the-power-of-git-subtree/?_ga=2-71978451-1385799339-1568044055-1068396449-1567112770