I'm trying to use Clion IDE to compile a simple program using Qt library, but I can't figure out how to configure CMakeLists.txt file. (I'm not familiar with cmake and toolchain)
this is my current CMakeLists.txt file:
cmake_minimum_required(VERSION 3.2)
project(MyTest)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES main.cpp)
add_executable(MyTest ${SOURCE_FILES})
# Define sources and executable
set(EXECUTABLE_NAME "MySFML")
add_executable(${EXECUTABLE_NAME} main.cpp)
# Detect and add SFML
set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake_modules" ${CMAKE_MODULE_PATH})
find_package(SFML 2 REQUIRED system window graphics network audio)
if(SFML_FOUND)
include_directories(${SFML_INCLUDE_DIR})
target_link_libraries(${EXECUTABLE_NAME} ${SFML_LIBRARIES})
endif()
It's configured to use SFML library with a "FindSFML.cmake" file and it works fine. (I have copied these files from some tutorial) now I want some help regarding proper CMakeLists.txt configuration to compile programs that are using Qt library (it's more helpful if the files and explanations are provided).
P.S: my current OS is manjaro 0.8.13 and all I could find was explaining configurations in windows environment so I was unable to implement those tutorials.
In addition to #tomvodi's answer, you can use a simpler syntax :
find_package(Qt5 REQUIRED COMPONENTS Core Widgets Gui).
Then, you don't call qt5_use_modules but instead use the standard command to link :
target_link_libraries(MyTest Qt5::Core Qt5::Widgets Qt5::Gui)
Your CMake project file is missing the Qt packages. You have to add:
find_package( Qt5Core REQUIRED )
find_package( Qt5Widgets REQUIRED )
find_package( Qt5Gui REQUIRED )
and then
qt5_use_modules( MyTest Core Widgets Gui )
Related
I am trying to compile openGL file including "png.h" header file,
I got the following error:
Open GL version 2.1 ATI-3.2.24
libpng warning: Application built with libpng-1.4.12 but running with 1.6.37
error: png_create_read_struct returned 0.
Failed to read image texture from ../images/ceramic.png
My Cmakelists.txt file :
cmake_minimum_required (VERSION 3.13)
project (teapot)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
find_package(OpenGL REQUIRED)
find_package(GLUT REQUIRED)
find_package(PNG REQUIRED)
include_directories(${PNG_INCLUDE_DIR})
add_executable(teapot teapot.cpp)
target_link_libraries(teapot ${OPENGL_gl_LIBRARY} ${GLUT_LIBRARIES} ${PNG_LIBRARIES} )
set(CMAKE_CXX_FLAGS "-I ${CMAKE_OSX_SYSROOT} ${CMAKE_CXX_FLAGS} -std=c++11")
if (APPLE)
set (CMAKE_CXX_FLAGS "-Wno-deprecated-declarations ${CMAKE_CXX_FLAGS}")
endif ()
set_target_properties(teapot PROPERTIES
CXX_STANDARD 11
CXX_STANDARD_REQUIRED YES
CXX_EXTENSIONS NO
)
cmake . works fine, but when I execute ./teapot the above error occurred. Thanks for any help!
You've probably only have development libraries installed for libpng-1.4.12 and not for libpng-1.6.37 or some other "non-standard" installation.
But the message seems pretty clear you linked against an older version but have a newer version in the runtime path of loadable libraries.
find_package(PNG REQUIRED) is only going to search the "standard" locations via find_library().
You may also want to update your CMakeLists.txt file to use target_link_libraries( ... PNG::PNG). This is simpler than trying to use the PNG variables that get set; which is missing PNG_DEFINITIONS when compiling your project. Refer to the CMake manual buildsystem section about library targets.
You can inspect the variables by using the message() command to print out their values. Some of them will also be stored in CMakeCache.txt.
If libpng isn't in the standard locations then you have to use target_link_libraries( ... /path/to/lib) and target_include_directories( ... /path/to/lib/headers), etcetera to handle it.
I have installed opencv, qt, qt creator, cmake on ubuntu 15.10 through VMware on windows.
The opencv is installed in this directory: /home/majidalaeinia/opencv/
The project repository is cloned in this directory: /home/majidalaeinia/Desktop/imgwarp-opencv/
I want to run the project through its CMakeLists.txt in qt creator and when I press Build now on qt creator, I get the following errors:
error: cannot find -lopencv_imgcodecs
error: collect2: error: ld returned 1 exit status
Where is the problem and how can I solve it?
# Majid Alaeinia, from the CMakeLists.txt file you posted it is not specified how CMAKE should find the libraries requested from your project. Also there are no target_link_libraries declared so CMAKE does not know where to link them. Hopefully the following small example template should be helpful for your project:
cmake_minimum_required (VERSION 3.1)
project(yourProject)
find_package( OpenCV REQUIRED )
find_package( Qt5 REQUIRED COMPONENTS Sql )
### this is for c++11
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(CMAKE_INCLUDE_CURRENT_DIR ON)
### QT stuff if you want a GUI
set(CMAKE_AUTOMOC ON) # autogenerate qt gui features
set(CMAKE_AUTORCC ON) # used for QT resource Files (if you need)
## Additional operation...
# From here you are specifically linking all OpenCV libraries and executables
### Add executables
add_executable(yourExecutable main/main.cpp ui/res/res.qrc ${SRCS} ${UI_HDRS} ${UI_SRCS})
target_link_libraries (yourProject example Qt5::Widgets ${OpenCV_LIBS} Qt5::Sql)
### Add Library
add_library(yourProject_lib SHARED ${SRCS} ${UI_HDRS})
target_link_libraries (yourProject_lib example Qt5::Widgets ${OpenCV_LIBS})
# Majid Alaeinia,I uploaded the repository and went through the code. if you go inside the demo folder and you change the present CMakeLists.txt file with the one I provided below it should compile (It does compile on mine with the provided changes):
project(demo)
cmake_minimum_required(VERSION 2.6)
find_package(Qt5 REQUIRED COMPONENTS Widgets Core)
FIND_PACKAGE( OpenCV REQUIRED )
include_directories(${QT_INCLUDES} ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_SOURCE_DIR}/lib ${CMAKE_CURRENT_SOURCE_DIR})
set(demo_SRCS main.cpp projfile.cpp deformwin.cpp myimage.cpp singlephotoview.cpp pointspaint.cpp)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(CMAKE_INCLUDE_CURRENT_DIR ON)
#qt5_automoc(${demo_SRCS})
QT5_WRAP_CPP(QOBJ_CPP ${demo_SRCS})
qt5_wrap_ui(helloworld_FORMS_HEADERS deformwin.ui)
add_executable(demo ${demo_SRCS} ${helloworld_FORMS_HEADERS})
target_link_libraries(demo ${QT_QTCORE_LIBRARY} ${QT_QTGUI_LIBRARY} imgwarp-lib opencv_core opencv_imgproc opencv_imgcodecs)
The code in the repository is an old code and still carries Qt4 as main wrappers. I think you probably have Qt5 installed on your computer and in fact the code I provided it will work for Qt5. Use it as a guideline for the other CMakeLists.txt file present inside src folder and change accordingly.
CMake will compile but because it was used Qt4 you need to figure out the most important modules to add, for example the new standard for including QtGui/QApplication is usually substituted by QtWidgets/QApplication
I also wanted to leave my previous answer in case you need a starting point or a initial template. I hope this clarifies a bit more and can get you move forward for your project.
For the past few days I've been searching everywhere and can't seem to fix this problem or maybe I just didn't understand some answers.
I have an application (a game to be precise) built with SFML that I managed to compile on Linux with 2.4.2 version. I want to migrate to 2.5.1 and be able to compile on Windows so I changed the CMakeLists.txt file to this:
cmake_minimum_required(VERSION 3.0)
# There is no real need for C++17 or 14, but I like to use up-to-date versions
if(CMAKE_MAJOR_VERSION VERSION_GREATER 3.8.0)
set(CMAKE_CXX_STANDARD 17)
else()
set(CMAKE_CXX_STANDARD 14)
endif(CMAKE_MAJOR_VERSION VERSION_GREATER 3.8.0)
if (WIN32)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/Binaries/)
endif(WIN32)
# Includes
include_directories(include)
# Source files
set(SOURCE_FILES
source/main.cpp
source/Game.cpp
)
# Assets
set(ASSETS
assets/Fonts/xolonium.ttf
)
# Debug Mode
project(HexDebug VERSION 1.0 LANGUAGES CXX)
set(CMAKE_BUILD_TYPE DEBUG) # This is ignored by MSVC
#SFML Package
find_package(SFML 2.5 CONFIG COMPONENTS system window graphics network audio REQUIRED)
if(SFML_FOUND)
set(SFML_STATIC_LIBRARIES TRUE)
if(WIN32)
set(SFML_USE_STATIC_STD_LIBS TRUE)
endif(WIN32)
endif(SFML_FOUND)
if(UNIX)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/Binaries/Debug/)
endif(UNIX)
foreach(asset ${ASSETS})
configure_file(${asset} ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${asset} COPYONLY)
endforeach(asset)
add_executable(${PROJECT_NAME} ${SOURCE_FILES})
target_compile_options(${PROJECT_NAME} PRIVATE -g -Wall -O0 -D_DEBUG)
if(SFML_FOUND)
target_link_libraries(${PROJECT_NAME} sfml-system sfml-window sfml-graphics sfml-network sfml-audio)
endif(SFML_FOUND)
#Release Mode
project(Hex VERSION 1.0 LANGUAGES CXX)
set(CMAKE_BUILD_TYPE RELEASE) # This is ignored by MSVC
if(UNIX)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/Binaries/Release/)
endif(UNIX)
foreach(asset ${ASSETS})
configure_file(${asset} ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${asset} COPYONLY)
endforeach(asset)
add_executable(${PROJECT_NAME} ${SOURCE_FILES})
target_compile_options(${PROJECT_NAME} PRIVATE "-O3")
if(SFML_FOUND)
target_link_libraries(${PROJECT_NAME} sfml-system sfml-window sfml-graphics sfml-network sfml-audio)
endif(SFML_FOUND)
The cmake works and generates the VS solution, that I can build with msbuild (note that I don't want to launch Visual Studio, but only use msbuild). But once I try to run it, it asks for dlls and I don't want that.
I thought that would be solved by linking statically (I don't know much about static or dynamic linking) but it still asks for them.
In this link they say that we don't need to include the ${SFML_INCLUDE_DIR} and ${SFML_LIBRARIES} anymore: https://en.sfml-dev.org/forums/index.php?topic=24070.0
How can I avoid that? I want to be completely independant from DLL's or at least be able to include the bin directory installed from SFML compiled and installed binaries (that I compiled, not the precompiled).
Thank you.
How to compile c++ file (opencv included) using opencv 3.2, mingw and command window in Windows 10. (I do not want to use any softwares like codeblocks/Vbasic/eclipse/netbeans).
Try using cmake for generating the makefile and then use the same for make and build.
Following is a minimalisitic example of cmake wherein I was using opencv for clustering of pixels.
You need to create a CMakeLists.txt file and add the following things. for more information on building you can check my github repo:
https://github.com/anubhavrohatgi/ImageProcessing.git
#Cmake for Clustering Project
PROJECT(clustering)
#Minimum version of Cmake required
cmake_minimum_required(VERSION 3.1)
IF(NOT CMAKE_BUILD_TYPE)
SET(CMAKE_BUILD_TYPE Release)
ENDIF(NOT CMAKE_BUILD_TYPE)
#Find and add opencv libraries
find_package(OpenCV REQUIRED core imgproc highgui imgcodecs)
IF(${OpenCV_VERSION} VERSION_LESS 2.4.12)
MESSAGE(FATAL_ERROR "OpenCV version is not compatible : ${OpenCV_VERSION}")
ENDIF()
#Check for C++ Compiler version. I am using C++14.
INCLUDE(CheckCXXCompilerFlag)
CHECK_CXX_COMPILER_FLAG("-std=c++14" COMPILER_SUPPORTS_CXX14)
CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
IF(COMPILER_SUPPORTS_CXX14)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14")
ELSEIF(COMPILER_SUPPORTS_CXX0X)
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
ELSE()
MESSAGE(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++14 support. Please use a different C++ compiler.")
ENDIF()
#include the header files located in the include folder
INCLUDE_DIRECTORIES(include)
#Set the variables for Headers and Sources. Manually add the filenames. This
#is useful if the files are changed, removed or name modified.
#Better than GLOB version
SET( HEADERS
include/clustering.h
)
set( SOURCES
src/main.cpp
)
add_executable(clustering ${SOURCES} ${HEADERS})
target_link_libraries(clustering
${OpenCV_LIBS}
)
I'm trying to build an application on Linux with Qt where I can set the Cursor position. The project is managed with CMake.
CMakeLists.txt:
cmake_minimum_required(VERSION 2.8.4)
project(Project)
add_definitions(-std=gnu++14 -std=c++14 -Wall -Wextra)
set(CMAKE_PREFIX_PATH "/home/elmewo/Libraries/Qt/5.3/gcc_64")
set(CMAKE_AUTOMOC ON)
find_package(Qt5Core REQUIRED)
find_package(Qt5Quick REQUIRED)
find_package(Qt5Gui REQUIRED)
include_directories(${CMAKE_SOURCE_DIR}/src)
set(SOURCE_FILES src/main.cpp)
add_executable(Project ${SOURCE_FILES})
qt5_use_modules(Project Core Quick Gui)
The packages are found by CMake. But when I try to
#include <QCursor>
my compiler says
fatal error: QCursor: file or directory not found
I was able to compile another basic QGuiApplication on the same machine.
The QCursor file is situated in ${CMAKE_PREFIX_PATH}/include/QtGui.
Am I missing something?
It seems that you are depending on 2.8.4, so at least you either need to change your build rules based on this or you will need to upgrade the dependency to at least cmake version 2.8.9:
Using Qt 5 with CMake older than 2.8.9
If using CMake older than 2.8.9, the qt5_use_modules macro is not available. Attempting to use it will result in an error.
To use Qt 5 with versions of CMake older than 2.8.9, it is necessary to use the target_link_libraries, include_directories, and add_definitions commands, and to manually specify moc requirements with either qt5_generate_moc or qt5_wrap_cpp:
Therefore, please add these if you stick with old cmake:
# Add the include directories for the Qt 5 Widgets module to
# the compile lines.
include_directories(${Qt5Core_INCLUDE_DIRS} ${Qt5Gui_INCLUDE_DIRS} ${Qt5Quick_INCLUDE_DIRS})
#Link the helloworld executable to the Qt 5 widgets library.
target_link_libraries(helloworld Qt5::Core Qt5::Gui Qt5::Quick)