Qt5Network.dll fatal error LNK1169: one or more multiply defined symbols found in game programming

SGaist

Hi,

You have to give more details about where it's happening.

liuxin

The error is :
link /NOLOGO /DYNAMICBASE /NXCOMPAT /BASE:0x64000000 /INCREMENTAL:NO /DLL /SUBSYSTEM:WINDOWS /VERSION:5.9 /MANIFEST:embed /OUT:....\lib\Qt5Network.dll @C:\Users\LK-JL\AppData\Local\Temp\nm2858.tmp
5>qhttp2protocolhandler.obj : error LNK2005: "private: static unsigned int const QHttp2ProtocolHandler::maxAcceptableTableSize" (?maxAcceptableTableSize@QHttp2ProtocolHandler@@0IB) 已经在 qhttpnetworkconnectionchannel.obj 中定义
5>qhttp2protocolhandler.obj : error LNK2005: "private: static int const QHttp2ProtocolHandler::sessionMaxRecvWindowSize" (?sessionMaxRecvWindowSize@QHttp2ProtocolHandler@@0HB) 已经在 qhttpnetworkconnectionchannel.obj 中定义
5>qhttp2protocolhandler.obj : error LNK2005: "private: static int const QHttp2ProtocolHandler::streamInitialRecvWindowSize" (?streamInitialRecvWindowSize@QHttp2ProtocolHandler@@0HB) 已经在 qhttpnetworkconnectionchannel.obj 中定义
5> building library ....\lib\Qt5Network.lib 和对象 ....\lib\Qt5Network.exp
5>....\lib\Qt5Network.dll : fatal error LNK1169: one or more multiply defined symbols found in programming

SGaist

How are you building Qt ?

liuxin

My custom make file is :

Download and build Qt5

include(cmake/Externals.cmake)

List of modules can be found in git repo here: github.com/qt/qt5

set(MODULES_TO_EXCLUDE
-skip qt3d
-skip qtactiveqt
-skip qtandroidextras
-skip qtcanvas3d
-skip qtcharts
-skip qtconnectivity
-skip qtdatavis3d
-skip qtdeclarative
-skip qtdoc
-skip qtdocgallery
-skip qtenginio
-skip qtfeedback
-skip qtgamepad
-skip qtgraphicaleffects
-skip qtimageformats
-skip qtlocation
-skip qtmacextras
-skip qtnetworkauth
-skip qtpim
-skip qtpurchasing
-skip qtqa
-skip qtquick1
-skip qtquickcontrols
-skip qtquickcontrols2
-skip qtremoteobjects
-skip qtrepotools
-skip qtscript
-skip qtscxml
-skip qtsensors
-skip qtserialbus
-skip qtserialport
-skip qtspeech
-skip qtsvg
-skip qtsystems
-skip qttools
-skip qttranslations
-skip qtvirtualkeyboard
-skip qtwayland
-skip qtwebchannel
-skip qtwebengine
-skip qtwebsockets
-skip qtwebview
-skip qtwinextras
-skip qtx11extras
-skip qtxmlpatterns
)

if(WIN32)
#set(BUILD_COMMAND set CL=/MP; nmake)
set(BUILD_COMMAND nmake)
set(CONFIGURE_COMMAND ${FAST_EXTERNAL_BUILD_DIR}/qt5/src/qt5/configure.bat)
set(URL "http://download.qt.io/archive/qt/5.10/5.10.1/single/qt-everywhere-src-5.10.1.zip")
set(URL_HASH SHA256=b6cdb6ecc70f4194cd55d6aff2d3e4c964b9abf9a204e12410dd22261ff7ff3b)
set(OPTIONS
-opensource;
-confirm-license;
-release;
-no-compile-examples;
-no-openssl;
-no-libproxy;
-no-qml-debug;
-nomake tools;
-nomake tests;
-opengl desktop;
-qt-zlib;
-qt-libpng;
-qt-libjpeg;
-qt-freetype;
${MODULES_TO_EXCLUDE}
)
else()
set(BUILD_COMMAND make -j4)
set(CONFIGURE_COMMAND ${FAST_EXTERNAL_BUILD_DIR}/qt5/src/qt5/configure)
set(URL "http://download.qt.io/archive/qt/5.9/5.9.4/single/qt-everywhere-opensource-src-5.9.4.tar.xz")
set(URL_HASH SHA256=e3acd9cbeafba3aed9f14592f4d70bf0b255e0203943e8d2b4235002268274d5)
if(APPLE)
set(OPTIONS
-opensource;
-confirm-license;
-release;
-no-compile-examples;
-no-openssl;
-no-libproxy;
-no-qml-debug;
-nomake tools;
-nomake tests;
-opengl desktop;
-qt-zlib;
-qt-libpng;
-qt-libjpeg;
-no-directfb;
-no-framework;
${MODULES_TO_EXCLUDE}
)
else()
set(OPTIONS
-opensource;
-confirm-license;
-release;
-no-compile-examples;
-no-openssl;
-no-libproxy;
-no-qml-debug;
-nomake tools;
-nomake tests;
-opengl desktop;
-qt-zlib;
-qt-libpng;
-qt-libjpeg;
-system-freetype;
-qt-xcb;
-qt-xkbcommon;
-no-directfb;
-no-linuxfb;
-fontconfig;
${MODULES_TO_EXCLUDE}
)
endif()
endif()

ExternalProject_Add(qt5
PREFIX ${FAST_EXTERNAL_BUILD_DIR}/qt5
BINARY_DIR ${FAST_EXTERNAL_BUILD_DIR}/qt5
URL ${URL}
URL_HASH ${URL_HASH}
CONFIGURE_COMMAND
${CONFIGURE_COMMAND}
-prefix ${FAST_EXTERNAL_INSTALL_DIR};
${OPTIONS}
BUILD_COMMAND
${BUILD_COMMAND}
INSTALL_COMMAND
${BUILD_COMMAND} install

)
if(WIN32)
set(Qt5Gui_LIBRARY Qt5Gui.lib)
set(Qt5Core_LIBRARY Qt5Core.lib)
set(Qt5Widgets_LIBRARY Qt5Widgets.lib)
set(Qt5OpenGL_LIBRARY Qt5OpenGL.lib)
set(Qt5Multimedia_LIBRARY Qt5Multimedia.lib)
set(Qt5MultimediaWidgets_LIBRARY Qt5MultimediaWidgets.lib)
else()
set(Qt5Gui_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}Qt5Gui${CMAKE_SHARED_LIBRARY_SUFFIX})
set(Qt5Core_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}Qt5Core${CMAKE_SHARED_LIBRARY_SUFFIX})
set(Qt5Widgets_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}Qt5Widgets${CMAKE_SHARED_LIBRARY_SUFFIX})
set(Qt5OpenGL_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}Qt5OpenGL${CMAKE_SHARED_LIBRARY_SUFFIX})
set(Qt5Multimedia_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}Qt5Multimedia${CMAKE_SHARED_LIBRARY_SUFFIX})
set(Qt5MultimediaWidgets_LIBRARY ${CMAKE_SHARED_LIBRARY_PREFIX}Qt5MultimediaWidgets${CMAKE_SHARED_LIBRARY_SUFFIX})
endif()
list(APPEND FAST_EXTERNAL_DEPENDENCIES qt5)

CMake GUI configure and Generate with VS2013 64bit:
0_1527469140296_73e709d9-65e1-47e7-8bf5-7adee88d0650-image.png
CMake Deprecation Warning at CMakeLists.txt:49 (cmake_policy):
The OLD behavior for policy CMP0043 will be removed from a future version
of CMake.

The cmake-policies(7) manual explains that the OLD behaviors of all
policies are deprecated and that a policy should be set to OLD only under
specific short-term circumstances. Projects should be ported to the NEW
behavior and not rely on setting a policy to OLD.

Found OpenMP_C: -openmp (found version "2.0")
Found OpenMP_CXX: -openmp (found version "2.0")
Found OpenMP: TRUE (found version "2.0")
-- OpenMP was detected. Using OpenMP to speed up some calculations.
Looking for CL_VERSION_2_0
Looking for CL_VERSION_2_0 - not found
Looking for CL_VERSION_1_2
Looking for CL_VERSION_1_2 - found
Found OpenCL: C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v8.0/lib/x64/OpenCL.lib (found version "1.2")
-- OpenCL library: C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v8.0/lib/x64/OpenCL.lib
Found OpenGL: opengl32
Performing Test COMPILER_HAS_DEPRECATED_ATTR
Performing Test COMPILER_HAS_DEPRECATED_ATTR - Failed
Performing Test COMPILER_HAS_DEPRECATED
Performing Test COMPILER_HAS_DEPRECATED - Success
-- LIBS: Qt5Core.lib;Qt5Gui.lib;Qt5Widgets.lib;Qt5OpenGL.lib;Qt5Multimedia.lib;Qt5MultimediaWidgets.lib;debug;zlibd.lib;optimized;zlib.lib;ofstd.lib;oflog.lib;dcmdata.lib;dcmimgle.lib;OpenIGTLink.lib C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v8.0/lib/x64/OpenCL.lib;opengl32;glu32
-- Python module not enabled in CMake, Python bindings will NOT be created.
Configuring done
Generating done

SGaist

Just to be sure: you are building a custom Qt as part of your project build process ?

chivstyle

Move the static vars to qhttp2protocolhandler.cpp， it will work. Remove the assignment in qhttp2protocolhandler_p.h。
//const qint32 QHttp2ProtocolHandler::sessionMaxRecvWindowSize;
//const qint32 QHttp2ProtocolHandler::streamInitialRecvWindowSize;
//const quint32 QHttp2ProtocolHandler::maxAcceptableTableSize;
const quint32 QHttp2ProtocolHandler::maxAcceptableTableSize = 16 * HPack::FieldLookupTable::DefaultSize;
const qint32 QHttp2ProtocolHandler::sessionMaxRecvWindowSize = Http2::defaultSessionWindowSize * 10;
const qint32 QHttp2ProtocolHandler::streamInitialRecvWindowSize = Http2::defaultSessionWindowSize;

liuxin

@SGaist Yes.

SGaist

Isn't that a bit overkill ?

liuxin

@SGaist said in Qt5Network.dll fatal error LNK1169: one or more multiply defined symbols found in game programming:

a bit overkill

sorry，what do you mean ?

SGaist

It's pretty unusual to have the building of a framework as big as Qt as part of the build process of an application,