main (as entry point of both libraries) outputs version info.

respective version info.

CArunGUI/CArunGUI.pro

@@ -4,6 +4,8 @@ QT      +=network
     # for TCP-IP
 
 TARGET  = CArunGui
+VERSION = "1.0.0"
+
 DESTDIR=$${_PRO_FILE_PWD_}/../build
 
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

DCLibraries.pri

@@ -2,6 +2,7 @@ CONFIG += plugin
 QT -= gui
 QT += widgets serialport
 
+
 win32 {
     BUILD_DATE=$$system("date /t")
     BUILD_TIME=$$system("time /t")
@@ -29,10 +30,26 @@ DEFINES+=APP_EXTENDED_VERSION=\\\"$$EXTENDED_VERSION\\\"
 # keep comments, as /* fall through */
 QMAKE_CXXFLAGS += -C
 # _FORTIFY_SOURCE requires compiling with optimization (-O) [-Wcpp]
-QMAKE_CXXFLAGS += -O
+QMAKE_CXXFLAGS += -O2 -O
 QMAKE_CXXFLAGS += -g
 QMAKE_CXXFLAGS += -Wno-deprecated-copy
 
+QMAKE_LFLAGS += -Wl,-e,main
+
+gccmain.input = SOURCES_MAIN
+gccmain.output = main.o
+gccmain.commands = \
+    $$QMAKE_CXX -c $$PWD/src/main.cpp -o main.o -fPIC -O0 -DAPP_VERSION=\\\"$$VERSION\\\" \
+                -DAPP_BUILD_DATE=\\\"$$BUILD_DATE\\\" \
+                -DAPP_BUILD_TIME=\\\"$$BUILD_TIME\\\" \
+                -DAPP_EXTENDED_VERSION=\\\"$$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/
+
+QMAKE_EXTRA_COMPILERS += gccmain
+SOURCES_MAIN += $$PWD/src/main.cpp
+
 # default
 ARCH = PTU5
 CONFIG += PTU5
@@ -80,9 +97,8 @@ HEADERS += \
 
 SOURCES += \
     $${PWD}/src/com.cpp \
-    $$PWD/src/datei.cpp \
-    $$PWD/src/runProc.cpp \
-    $$PWD/src/main.cpp \
+    $${PWD}/src/datei.cpp \
+    $${PWD}/src/runProc.cpp \
     $${PWD}/src/controlBus.cpp \
     $${PWD}/src/datIf.cpp \
     $${PWD}/src/dcBL.cpp \

dCArun/dCArun.pro

@@ -4,6 +4,8 @@ QT      +=network
     # for TCP-IP
 
 TARGET  = dCArun
+VERSION = "1.0.0"
+
 DESTDIR=$${_PRO_FILE_PWD_}/../build
 
 

lib_ca_master/lib_ca_master.pro

@@ -6,5 +6,8 @@ include(../DCLibraries.pri)
 
 DEFINES+=THIS_IS_CA_MASTER
 DESTDIR=$${_PRO_FILE_PWD_}/../build
-system("mkdir -p $${DESTDIR}")
-system("cp ../include/interfaces.h $${DESTDIR}")
+
+unix {
+    system("mkdir -p $${DESTDIR}")
+    system("cp ../include/interfaces.h $${DESTDIR}")
+}

lib_ca_slave/lib_ca_slave.pro

@@ -6,5 +6,8 @@ include(../DCLibraries.pri)
 
 DEFINES+=THIS_IS_CA_SLAVE
 DESTDIR=$${_PRO_FILE_PWD_}/../build
-system("mkdir -p $${DESTDIR}")
-system("cp ../include/interfaces.h $${DESTDIR}")
+
+unix {
+    system("mkdir -p $${DESTDIR}")
+    system("cp ../include/interfaces.h $${DESTDIR}")
+}

src/main.cpp

@@ -1,9 +1,25 @@
-#include <QCoreApplication>
-#include "tslib.h"
 
-int main(int argc, char *argv[])
-{
-    QCoreApplication a(argc, argv);
+#ifndef WIN32
 
-    return a.exec();
+#undef _FORTIFY_SOURCE
+
+#include <unistd.h> // _exit(0)
+#include <stdio.h>
+
+// Must define the interpreter to be the dynamic linker
+#ifdef __LP64__
+#error "__LP64__ not defined for PTU5"
+#else
+const char service_interp[] __attribute__((section(".interp"))) = "/lib/ld-linux-armhf.so.3";
+#endif
+
+
+int main(int argc, char *argv[]) {
+    (void)argc;
+    (void)argv;
+
+    printf("%s %s %s\n", APP_EXTENDED_VERSION, APP_BUILD_DATE, APP_BUILD_TIME);
+    _exit(0);
 }
+
+#endif