No QWebEngineCallback Qt5.6.3 Ubuntu16.04
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Hi...
Cmake make a super job...
this tool find all crumbs....
last night i try to build QTAV video sdk module to qt5 https://github.com/wang-bin/QtAV
on qmake only error... to find libs..
on cmake after 10 min all was build & example to...# WebEngine support IF(USE_QTWEBENGINE) FIND_PACKAGE(Qt5 ${QT_MIN_VERSION} QUIET COMPONENTS WebEngine WebEngineWidgets WebChannel) SET(BALL_HAS_QTWEBENGINE TRUE) IF(NOT Qt5WebEngine_FOUND) MESSAGE(STATUS "QtWebEngine has not been found. Disabling WebEngine support.") SET(BALL_HAS_QTWEBENGINE FALSE) ENDIF() IF(NOT Qt5WebEngineWidgets_FOUND) MESSAGE(STATUS "QtWebEngineWidgets has not been found. Disabling WebEngine support.") SET(BALL_HAS_QTWEBENGINE FALSE) ENDIF() IF(NOT Qt5WebChannel_FOUND) MESSAGE(STATUS "QtWebChannel has not been found. Disabling WebEngine support.") SET(BALL_HAS_QTWEBENGINE FALSE) ENDIF() IF(BALL_HAS_QTWEBENGINE) LIST(APPEND VIEW_DEP_LIBRARIES Qt5::WebEngineWidgets Qt5::WebChannel) ENDIF() ENDIF()@patrik08 thank you for the sample code and the link. But I don't know which part of the code should change to the new style, find_package(Qt5 COMPONENTS ... ... REQUIRED). Currently it finds the required libraries automatically and asks for them which I address one by one. For example, the cmake flags after configuration, look like
Qt5Charts_DIR .../Qt56/5.9.1/gcc_64/lib/cmake/Qt5Charts
Qt5Core_DIR .../Qt56/5.6.3/gcc_64/lib/cmake/Qt5Core -
@patrik08 thank you for the sample code and the link. But I don't know which part of the code should change to the new style, find_package(Qt5 COMPONENTS ... ... REQUIRED). Currently it finds the required libraries automatically and asks for them which I address one by one. For example, the cmake flags after configuration, look like
Qt5Charts_DIR .../Qt56/5.9.1/gcc_64/lib/cmake/Qt5Charts
Qt5Core_DIR .../Qt56/5.6.3/gcc_64/lib/cmake/Qt5Core -
@jsulm after separation of the two sentences in the header, i.e.,
#include <QtWebEngineWidgets\QWebEngineView>
#include <QtWebEngineCore\QWebEngineCallback>into four sentences such as
#include <QWebEngineCallback>
then it does not complain any more that some files do not exist but it gives many errors like
/home/v/software/itk482v2/source/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:387:60: error: ‘constexpr’ needed for in-class initialization of static data member ‘const float vnl_numeric_traits<float>::zero’ of non-integral type [-fpermissive]
static const float zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0F); -
@jsulm after separation of the two sentences in the header, i.e.,
#include <QtWebEngineWidgets\QWebEngineView>
#include <QtWebEngineCore\QWebEngineCallback>into four sentences such as
#include <QWebEngineCallback>
then it does not complain any more that some files do not exist but it gives many errors like
/home/v/software/itk482v2/source/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:387:60: error: ‘constexpr’ needed for in-class initialization of static data member ‘const float vnl_numeric_traits<float>::zero’ of non-integral type [-fpermissive]
static const float zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0F);I also tried Qt5.7 instead of 5.9. This time the headers, i.e,
#include <QtWebEngineWidgets\QWebEngineView>
#include <QtWebEngineCore\QWebEngineCallback>had no problem (and perhaps I should change the title to solved); however, it gives many errors like the below one:
/home/v/software/itk482v2/source/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:387:60: error: ‘constexpr’ needed for in-class initialization of static data member ‘const float vnl_numeric_traits<float>::zero’ of non-integral type [-fpermissive]
static const float zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0F);The original code is run well but when a new cxx containing these two headers are added, it gives this problem and only in my system, Ubuntu 16.04 not in the Visual Studio.
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I also tried Qt5.7 instead of 5.9. This time the headers, i.e,
#include <QtWebEngineWidgets\QWebEngineView>
#include <QtWebEngineCore\QWebEngineCallback>had no problem (and perhaps I should change the title to solved); however, it gives many errors like the below one:
/home/v/software/itk482v2/source/Modules/ThirdParty/VNL/src/vxl/core/vnl/vnl_numeric_traits.h:387:60: error: ‘constexpr’ needed for in-class initialization of static data member ‘const float vnl_numeric_traits<float>::zero’ of non-integral type [-fpermissive]
static const float zero VCL_STATIC_CONST_INIT_FLOAT_DECL(0.0F);The original code is run well but when a new cxx containing these two headers are added, it gives this problem and only in my system, Ubuntu 16.04 not in the Visual Studio.
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@jsulm thank you. How can I write it in a cmakelists.txt or ctestconfig.cmake file? The code doesn't have a .pro file.
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@jsulm thank you for the link. I added that term and didn't solve the problem. I also tried with two further below terms:
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)but still cmake gives that error. The software is itk-snap and it works fine with Qt5.7 and msvc 2015 but in linux still I cannot compile it with Qt 5.7 and higher versions.
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@jsulm thank you for the link. I added that term and didn't solve the problem. I also tried with two further below terms:
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)but still cmake gives that error. The software is itk-snap and it works fine with Qt5.7 and msvc 2015 but in linux still I cannot compile it with Qt 5.7 and higher versions.
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@jsulm right. First I added only this term (set (CMAKE_CXX_STANDARD 11)) that didn't solve the problem. Then I added each of
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
one by one to the code and once together, but still it cannot be compiled and gives the same error message.
