2017-01-18 Tried to compile QT5 on windows: - no PNG (64 bit issues), exe does not run ;-)

backend_qt/backend_qt.pro

@@ -21,6 +21,9 @@ INCLUDEPATH += ../backend
 #EDIT THIS !!!!
 DEFINES += ZINT_VERSION="\\\"2.5.0\\\""
 
+# Win
+DEFINES += NO_PNG
+
 !contains(DEFINES, NO_PNG) {
     INCLUDEPATH += ../../lpng
     INCLUDEPATH += ../../zlib

frontend_qt/frontend_qt.pro

@@ -4,6 +4,7 @@ DEPENDPATH += . debug release
 INCLUDEPATH += .
 QT += gui
 QT += uitools
+DEFINES += NO_PNG
 
 # Input
 HEADERS += barcodeitem.h \
@@ -52,15 +53,16 @@ CONFIG += static
 
 CONFIG += warn_on thread qt uitools
 
-INCLUDEPATH += ../backend_qt4 ../backend
+INCLUDEPATH += ../backend_qt ../backend
 
-LIBS += -lQZint -lQtCore
-QMAKE_LIBDIR += ../backend_qt4/release
+LIBS += -lQtZint -lQt5Core
+QMAKE_LIBDIR += ../backend_qt/release
 
 !contains(DEFINES, NO_PNG) {
-    LIBS += -lpng -zlib
-    QMAKE_LIBDIR += /usr/local/lib /usr/lib/x86_64-linux-gnu/
-#    QMAKE_LIBDIR+=../../lpng\projects\visualc71_converted_to_9\Win32_LIB_Release ../../lpng\projects\visualc71_converted_to_9\Win32_LIB_Release\zlib
-#    LIBS += -llibpng16 -lzlib1
-#    QMAKE_LIBDIR+=../../lpng\projects\visualc71_converted_to_9\Win32_DLL_Release ../../lpng\projects\visualc71_converted_to_9\Win32_DLL_Release\zlib
+# Win
+    LIBS += -llibpng -zlib
+    QMAKE_LIBDIR+=../../lpng/projects/visualc71_converted_to_9/Win32_LIB_Release ../../lpng/projects/visualc71_converted_to_9/Win32_LIB_Release/zlib
+# Unix
+    #LIBS += -lpng -zlib
+    #QMAKE_LIBDIR += /usr/local/lib /usr/lib/x86_64-linux-gnu/
 }

frontend_qt/howto_build_qzint_using_msvs2015.txt

@@ -0,0 +1,30 @@
+Harald Oehlmann
+2016-02-28
+
+How to build qzint.exe using:
+- QT 5.7 installed in C:\qt5
+- MS Visual Studio 2015 (VC12)
+
+Folder structure:
+- zint source files in $ZH
+  -> this file is in $ZH\frontend_qt
+- png1620.zip unzipped in $ZH\..\lpng
+  -> $ZH\..\lpng\png.h exists
+- zlib128.zip unzipped in folder $ZH\..\zlib
+  -> $ZH\..\zlib\zlib.h exists
+
+Build zint
+
+- Start in the start menu: "VS2015 x64 Native Tools-Eingabeaufforderung"
+- set PATH=C:\Qt5\5.7\msvc2015_64\bin;%PATH%
+- cd $ZH
+- cd backend_qt
+- qmake backend_qt.pro
+- nmake clean
+- nmake release
+    
+- cd ..\frontend_qt
+- qmake frontend_qt.pro
+- nmake clean
+- nmake release
+  -> qzint.exe is in the release folder