I'm writing a c project using cmake on a mac. I use homebrew. I installed libpqxx via homebrew. I have the following CMakeLists.txt.
cmake_minimum_required(VERSION 3.11)
project(imagedb)
set(CMAKE_CXX_STANDARD 14)
add_executable(imagedb main.cpp)
target_link_libraries( imagedb /usr/local/lib/libpqxx.dylib)
While this builds I would like to avoid using an absolute path here. How can I do this using cmake given that /usr/local is already in the path prefix?
Usually you should use find_package to find dependencies.
Looking at libpqxx's repo, you can see that they provide a CMake config file.
So in your CMakeLists.txt file you just have to do this:
find_package(libpqxx REQUIRED)
target_link_libraries(imagedb libpqxx::pqxx_shared)
If for some reason libpqxx-config.cmake is not shipped with the homebrew version, you have to write a find file.
Related
I'm trying to add the header-only library frugally-deep into my CMake project using vcpkg and the findpackage() command. I installed the frugally-deep package and its dependencies (Eigen3, nlohmannjson and FunctionalPlus) beforehand with the vcpkg install [package_name] command.
My CMake file currently looks like this:
cmake_minimum_required(VERSION 3.22)
project(untitled)
set(CMAKE_CXX_STANDARD 17)
find_package(Eigen3 CONFIG REQUIRED)
find_package(nlohmann_json CONFIG REQUIRED)
find_package(FunctionalPlus CONFIG REQUIRED)
find_package(frugally-deep CONFIG REQUIRED)
add_executable(untitled main.cpp)
I added the directories of the packages to the CMake arguments:
-DEigen3_DIR=C:\vcpkg\packages\eigen3_x86-windows\share\eigen3
-Dnlohmann_json_DIR=C:\vcpkg\packages\nlohmann-json_x86-windows\share\nlohmann_json
-DFunctionalPlus_DIR=C:\vcpkg\packages\fplus_x86-windows\share\FunctionalPlus
-Dfrugally-deep_DIR=C:\vcpkg\packages\frugally-deep_x86-windows\share\frugally-deep
CMake was able to find the packages for Eigen3, nlohmannjson and FunctionalPlus. But when I try to add the frugally-deep package I get the following error message:
CMake Error at CMakeLists.txt:9 (find_package):
Could not find a configuration file for package "frugally-deep" that is
compatible with requested version "".
The following configuration files were considered but not accepted:
C:/vcpkg/packages/frugally-deep_x86-windows/share/frugally-deep/frugally-deepConfig.cmake, version: 0.15.19 (32bit)
How do I resolve this issue?
Wild guess: You configured CMake to use x64 instead of x86. As such you cannot use the x86-windows triplet. Also you shouldn't use the packages folder. That folder is just a staging area for vcpkg. Consider using vcpkg.cmake using a manifest (vcpkg.json) to avoid such problems in the future.
So I have a project which depends on opencv, which is installed with vcpkg. The project is build with cmake.
CMakeLists.txt
cmake_minimum_required(VERSION 3.19.1)
project(mylib)
set (CMAKE_CXX_STANDARD 14)
find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})
link_libraries(${OpenCV_LIBS})
set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS TRUE)
add_library(mylib SHARED mylib.cpp another_lib.cpp)
That works fine.
Now, instead of vcpkg provided opencv, I want to use opencv from
https://sourceforge.net/projects/opencvlibrary/files/4.4.0/opencv-4.4.0-vc14_vc15.exe/download
After installing it on C:\opencv I see there is opencv\build\OpenCVConfig.cmake, which find_package look for, right?
But how do I make cmake get this one instead of the one from vcpkg?
Use <PackageName>_DIR variable pointing to where the config file is located. It works for any library which comes with a config file.
For you it would look like this:
set(OpenCV_DIR "C:/opencv/build")
Since it is incorrect to add hard-coded paths into persistent scripts, you can choose among different methods of providing this variable to your script:
Console invocation: cmake OpenCV_DIR="C:/opencv/build"
CMake presets (user)
Local config by using some LocalConfig.cmake with the content above (set(...)), which you include in your main script like this: include(LocalConfig.cmake)
So I'm trying to use OpenCV on windows (my ubunut is broken) and I can't configure my Clion to compile my openCV code.
first; i'm completely new to OpenCV so this question might be an easy one but I did all I could to find the problem to no avail.
I used MinGW and Clion and my codes run with no problem if I don't use OpenCv which indicates there's no problem with MinGW installation.
I downloaded OpenCv files and extracted them, then added them to System path.
after that I configured my Cmakelists.txt (my first time modifying it, so I was an amateur) like this.
After that I got this error:
Error:By not providing "FindOpenCV.cmake" in CMAKE_MODULE_PATH this
project has asked CMake to find a package configuration file provided
by "OpenCV", but CMake did not find one. Could not find a package
configuration file provided by "OpenCV" with any of the following
names: OpenCVConfig.cmake opencv-config.cmake Add the installation
prefix of "OpenCV" to CMAKE_PREFIX_PATH or set "OpenCV_DIR" to a
directory containing one of the above files. If "OpenCV" provides a
separate development package or SDK, be sure it has been installed.
I know I'm doing something wrong or missing a step but I can't figure out why. is there any guide or tutorial for my scenario or can anyone point me towards a correct direction?
thanks in advance and any help appreciated.
I managed to make those errors go away with changing my
CMakeLists.txt to:
cmake_minimum_required(VERSION 3.5)
project(something)
set(OpenCV_DIR "E:/Programs/programming/opencv/build2") find_package( OpenCV REQUIRED )
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES main.cpp) add_executable(something ${SOURCE_FILES})
add_executable( {SOURCE_FILES} DisplayImage ) target_link_libraries( ${OpenCV_LIBS} DisplayImage )
and building the libraries on my own by minGW and Cmake.
Hello I need to work with OpenGL and want to create my project in Clion. But Clion cannot compile and run my projects because of the libraries I need to include. I can create my own makefile and run the program in terminal, but I want to do it in the IDE. How can I make this happen?
First make sure you installed all libraries correctly using the compiler you configured in clion/cmake. Assuminf you have a fresh CMakeLists.txt like
cmake_minimum_required(VERSION 3.3.2)
project(MyGL CPP)
add_executable(demo-run main.cpp)
For linking your libraries you need two things. First tell the compiler where to find the include files and second which libraries to link. You could just hard code you local installation like
target_link_libraries(demo-run path/to/glfw.lib path/to/opengl.lib path/to/jpeg.lib ...)
target_include_directories(demo-run PRIVATE path/to/glfw/include path/to/opengl/include path/to/jpeg/include ...)
however this is not very portable and if you want to work with another compiler or on another machine your project file will fail. Instead you can use the package system of cmake
find_package(PkgConfig REQUIRED)
pkg_search_module(GLFW REQUIRED glfw3)
find_package(JPEG REQUIRED)
find_package(GLEW REQUIRED)
find_package (OpenGL REQUIRED)
find_package (GLM REQUIRED)
target_link_libraries(demo-run ${GLFW_LIBRARIES} ${GLEW_LIBRARIES} ${JPEG_LIBRARIES} ${OPENGL_LIBRARIES})
target_include_directories(demo-run PRIVATE ${GLFW_INCLUDE_DIRS} ${GLEW_INCLUDE_DIR} ${JPEG_INCLUDE_DIR} ${OPENGL_INCLUDE_DIR} ${GLM_INCLUDE_DIR})
The glfw part is a bit tricky and works only on linux i guess see http://www.glfw.org/docs/3.0/build.html.
This code is not tested at all and you may need to specify some enviroment variables so cmake can find the packages or provide additional find scripts like https://github.com/lighttransport/nanogi/blob/master/cmake/FindGLM.cmake.
I would recommend to use the CMake build tool which does the work generating Makefiles for you and is also directly supported by clion. When you open the directory containing a CMakeLists.txt (CMake Project File) with clion, it should be automatically be loaded and compiled (if not just hit build)
A very simple example CMake project would look like this
cmake_minimum_required (VERSION 2.8.9)
project (OpenGl-Stuff)
include_directories(src)
add_executable(your-binary src/your-code.c src/your-code.h)
target_link_libraries(your-binary opengl)
# target_link_libraries will search for libopengl on standard system paths,
# maybe the library is not called libopengl, then you have to adjust the name above
this cmake project will generate the binary for you and link it against opengl
I'm very new to CLion, CMake and macOS at all so I need a little bit of help while trying to include cppnetlib into my CLion project.
I started out with creating an new CLion project which gave me a new CMakeLists.txt which I edited so that it would include boost as well:
CMAKE_MINIMUM_REQUIRED(VERSION 3.7)
PROJECT(myapp)
SET(CMAKE_CXX_STANDARD 11)
SET(SOURCE_FILES main.cpp)
ADD_EXECUTABLE(myapp ${SOURCE_FILES})
FIND_PACKAGE(Boost 1.63.0 REQUIRED)
INCLUDE_DIRECTORIES(${Boost_INCLUDE_DIR})
TARGET_LINK_LIBRARIES(dxcheck ${Boost_LIBRARIES})
I've installed boost through homebrew, but I did not find a package for cppnetlib with homebrew so I downloaded cppnetlib and placed it in /usr/local/Cellar/cpp-netlib. Now, when I follow the tutorial on their page and put
set (CMAKE_PREFIX_PATH ${CMAKE_PREFIX_PATH} /usr/local/Cellar/cpp-netlib)
find_package (cppnetlib 0.12.0 REQUIRED)
include_directories (${CPPNETLIB_INCLUDE_DIRS})
target_link_libraries (myapp ${CPPNETLIB_LIBRARIES})
into the CMakeLists.txt, I get the following output:
-- Boost version: 1.63.0
CMake Error at CMakeLists.txt:14 (find_package):
By not providing "Findcppnetlib.cmake" in CMAKE_MODULE_PATH this project
has asked CMake to find a package configuration file provided by
"cppnetlib", but CMake did not find one.
Could not find a package configuration file provided by "cppnetlib"
(requested version 0.11.0) with any of the following names:
cppnetlibConfig.cmake
cppnetlib-config.cmake
Add the installation prefix of "cppnetlib" to CMAKE_PREFIX_PATH or set
"cppnetlib_DIR" to a directory containing one of the above files. If
"cppnetlib" provides a separate development package or SDK, be sure it has
been installed.
I've already done some research about finding packages but all I could achieve was that I was able to include cppnetlib by manually adding the include path to the CMakeLists.txt but then I got an error saying that the compiler could not find the headers which are located inside the "deps" folder in cpp-netlib.
I know want to know how to include a package like cppnetlib properly into my CLion project using CMake. I am using CLion 2017.1, macOS Sierra and I think CLion is using CMake 3.7.