I'm new to cmake and LLVM. Here is a confusing question when I configure CMakeLists.txt for my own LLVM project.
Here is my CMakeLists.txt:
cmake_minimum_required(VERSION 3.24)
project(llvm_in_practice)
set(CMAKE_CXX_STANDARD 14)
FILE(GLOB SOURCE_FILES ${CMAKE_SOURCE_DIR}/src/*.cpp)
find_package(LLVM REQUIRED CONFIG)
include_directories(${LLVM_INCLUDE_DIRS})
add_definitions(${LLVM_DEFINITIONS})
include_directories(include)
add_executable(main ${SOURCE_FILES})
llvm_map_components_to_libnames(llvm_libs core)
target_link_libraries(main ${llvm_libs})
I'm ok with most of all the configuration except for llvm_map_components_to_libnames(llvm_libs core). In my source, I use #include <llvm/IR/Value.h> etc. to include LLVM into my project. However, in cmake, I need to know what component the header file belongs to for making cmake right.
I'v tried llvm_map_components_to_libnames(llvm_libs ir) which obviously not work. I also tried llvm-config --components to see all components but I do not know how to determine which one I should use.
How can I checkout which component the LLVM header file belongs to?
Related
I am trying to write a gui program using the gtk libraries and do some matrix operations with the cuda libraries, however I get an error when trying to link the cuda libraries in my project. My Cmake looks like this:
cmake_minimum_required(VERSION 3.21)
project(untitled1)
set(CMAKE_CXX_STANDARD 14)
find_package(CUDAToolkit)
include_directories(${CUDA_INCLUDE_DIRS})
link_directories(${CUDA_LIBRARY_DIRS})
find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK3 REQUIRED gtk+-3.0)
include_directories(${GTK3_INCLUDE_DIRS})
link_directories(${GTK3_LIBRARY_DIRS})
add_definitions(${GTK3_CFLAGS_OTHER})
add_executable(untitled1 main.cpp bob.h bob.cu)
target_link_libraries(untitled1 ${GTK3_LIBRARIES} ${CUDA_LIBRARIES} ${CUDA_CUDART_LIBRARY})
But I get the following error
-- Unable to find cuda_runtime.h in "/usr/lib/cuda/include" for CUDAToolkit_INCLUDE_DIR.
-- Unable to find cudart library.
-- Could NOT find CUDAToolkit (missing: CUDAToolkit_INCLUDE_DIR CUDA_CUDART) (found version "11.2.67")
-- Configuring done
CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
Please set them or make sure they are set and tested correctly in the CMake files:
CUDA_CUDART_LIBRARY (ADVANCED)
I am on Pop OS 21.10 (Ubuntu), I can use the Cuda libraries and nvcc outside of this project, so I know it is installed and working properly. I just don't know how to link the cuda libraries to a non cuda project.
Edit: Working CMakeLists.txt down below thx to dhyun
# Set the minimum version of cmake required to build this project
cmake_minimum_required(VERSION 3.21)
# Set the name and the supported language of the project
project(final CUDA)
set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CUDA_STANDARD 14)
# Use the package PkgConfig to detect GTK+ headers/library files
find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK3 REQUIRED gtk+-3.0)
# Setup CMake to use GTK+, tell the compiler where to look for headers
# and to the linker where to look for libraries
include_directories(${GTK3_INCLUDE_DIRS})
link_directories(${GTK3_LIBRARY_DIRS})
# Add other flags to the compiler
add_definitions(${GTK_CFLAGS_OTHER})
# Add an executable compiled from files:
add_executable(final main.cu showtext.h)
target_link_libraries(final ${GTK3_LIBRARIES})
# Idk what this does or if it's necessary, but it works with it and was there on creation
# So I'm keeping it :)
set_target_properties(final PROPERTIES
CUDA_SEPARABLE_COMPILATION ON)
I can't speak for your exact setup, but I've had success with CMake and CUDA on Ubuntu by directly enabling CUDA as a language in the project declaration rather than using find_package(CUDAToolkit).
Something like this:
cmake_minimum_required(VERSION 3.21)
project(untitled1 LANGUAGES CUDA CXX)
set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CUDA_STANDARD 14)
find_package(PkgConfig REQUIRED)
pkg_check_modules(GTK3 REQUIRED gtk+-3.0)
include_directories(${GTK3_INCLUDE_DIRS})
link_directories(${GTK3_LIBRARY_DIRS})
add_definitions(${GTK3_CFLAGS_OTHER})
add_executable(untitled1 main.cpp bob.h bob.cu)
target_link_libraries(untitled1 ${GTK3_LIBRARIES})
I believe cudart is linked automatically, but you will need to specify any other libraries you use (cufft, cublas, cudnn, etc.).
I'm trying to build a C++ application which uses the library libpamg0-dev.
I installed it with the following command on my elementaryOS VM.
apt-get install libpam0g-dev
When I try to compile the application, the compiler spits out the following errors:
undefined reference to `pam_start`
undefined reference to `pam_authenticate`
undefined reference to `pam_end`
My CMakeLists.txt looks like this:
cmake_minimum_required(VERSION 3.10)
project(application)
set(CMAKE_CXX_STANDARD 11)
INCLUDE_DIRECTORIES(/home/dnagl/dev/libs/restbed/distribution/include /usr/include/security)
LINK_DIRECTORIES(/home/dnagl/dev/libs/restbed/distribution/library /usr/lib/x86_64-linux-gnu)
add_executable(application main.cpp Utils/Json/Json.cpp Utils/Json/Json.h Utils/Stringhelper/Stringhelper.cpp Utils/Stringhelper/Stringhelper.h Utils/File/Filehelper.cpp Utils/File/Filehelper.h Utils/System/SystemHelper.cpp Utils/System/SystemHelper.h Controller/Info/InfoController.cpp Controller/Info/InfoController.h Rest/ResourceHandler/ResourceHandler.cpp Rest/ResourceHandler/ResourceHandler.h Controller/System/SystemController.cpp Controller/System/SystemController.h Rest/Log/RequestLogger.cpp Rest/Log/RequestLogger.h Controller/Authentication/AuthenticationController.cpp Controller/Authentication/AuthenticationController.h Controller/Log/LogController.cpp Controller/Log/LogController.h)
target_link_libraries(application restbed)
Maybe one of you knows how to link the library in the right way.
I have found a nice solution with find_package option from CMake. CMake provides a way to find packages/libraries with specified FindModule.cmake file.
A really good news is that there are a lot of existing module files. You can use this version to find PAM package on Linux. Put it to cmake/modules/ in your project folder and update your CMakeLists.txt:
cmake_minimum_required(VERSION 3.10)
project(restbed)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
set(CMAKE_CXX_EXTENSIONS OFF)
# Notify CMake that we have module files to find packages/libs.
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/modules/")
find_package(PAM REQUIRED)
# Check if we found PAM.
if (NOT PAM_FOUND)
message(FATAL_ERROR "PAM library was not found.")
endif ()
# Source configuration.
include_directories(
${PAM_INCLUDE_DIR}
${CMAKE_BINARY_DIR}
${CMAKE_CURRENT_BINARY_DIR}
)
set(EXECUTABLE_NAME "application")
# Add sources to this project's executable.
add_executable(${EXECUTABLE_NAME}
"main.cpp"
"Utils/Json/Json.cpp"
"Utils/Json/Json.h"
"Utils/Stringhelper/Stringhelper.cpp"
"Utils/Stringhelper/Stringhelper.h"
"Utils/File/Filehelper.cpp"
"Utils/File/Filehelper.h"
"Utils/System/SystemHelper.cpp"
"Utils/System/SystemHelper.h"
"Controller/Info/InfoController.cpp"
"Controller/Info/InfoController.h"
"Rest/ResourceHandler/ResourceHandler.cpp"
"Rest/ResourceHandler/ResourceHandler.h"
"Controller/System/SystemController.cpp"
"Controller/System/SystemController.h"
"Rest/Log/RequestLogger.cpp"
"Rest/Log/RequestLogger.h"
"Controller/Authentication/AuthenticationController.cpp"
"Controller/Authentication/AuthenticationController.h"
"Controller/Log/LogController.cpp"
"Controller/Log/LogController.h"
)
target_link_libraries(${EXECUTABLE_NAME}
${PAM_LIBRARIES}
)
set_target_properties(${EXECUTABLE_NAME} PROPERTIES LINKER_LANGUAGE CXX)
Hope this helps!
I am new in clion. on gcc i always use:
g++ bin/obj/main.o -o bin/main -lboost_filesystem -lboost_system -lcrypto
How to do it in clion?
It seems my CMakeList does not work:
cmake_minimum_required(VERSION 3.1)
project(motion_simulation)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(SOURCE_FILES main.cpp)
add_executable(motion_simulation ${SOURCE_FILES})
link_libraries(lboost_filesystem)
link_libraries(lboost_system)
link_libraries(lcrypto)
Try including the keyword "CMake" into your search next time. This question is actually not CLion specific because CLion actually uses CMake as buildsystem.
CMake is very well documented, and you should be able to find a lot of answers regarding your problem.
You could first try to get rid of that "l":
link_libraries(boost_filesystem)
If that doesn't work you should take a look how the find_package() command works. http://www.cmake.org/Wiki/CMake:How_To_Find_Libraries
And here is a detailed explanation how to find Boost libs and include directory.
http://www.cmake.org/cmake/help/v3.0/module/FindBoost.html
As you are using CMake 3.1 you can use some more advanced features of CMake.
With CMAKE_CXX_STANDARD you can select which C++ version you want to use and CMake will select the corresponding compiler flags (see docs).
link_libraries is one possibility, but it has to be called before add_executable or add_library. The alternative is target_link_libraries which links only to a single target, but can also manage transitive dependencies (docs).
CMake comes with find_package modules for OpenSSL and Boost to find dependencies and with the option REQUIRED, you can ensure that they are found on the system. Boost also supports COMPONENTS to select which libraries you need.
In case you ever work on a system, where OpenSSL and Boost are not installed in /usr/, you can already use target_include_directories to specify where the headers for your executable is found. Like target_link_libraries, target_include_directories can work with transitive dependencies, in this case PRIVATE.
cmake_minimum_required(VERSION 3.1)
project(motion_simulation)
set(CMAKE_CXX_STANDARD 11)
find_package(Boost REQUIRED COMPONENTS filesystem system)
find_package(OpenSSL REQUIRED)
set(SOURCE_FILES main.cpp)
add_executable(motion_simulation ${SOURCE_FILES})
target_include_directories(motion_simulation PRIVATE ${Boost_INCLUDE_DIRS} ${OPENSSL_INCLUDE_DIR})
target_link_libraries( motion_simulation PRIVATE ${Boost_LIBRARIES} ${OPENSSL_LIBRARIES})
I'm trying to learn cmake and have started converting an old make project over to cmake. Here is a simplified version of the directory structure I now have:
CMakeLists.txt
src/
CMakeLists.txt
main.cpp
core/
CMakeLists.txt
/sourcecode, other cmakes, etc.
test/
CMakeLists.txt
someTest.cpp
Currently, in my root CMakeLists.txt file I simply have this:
cmake_minimum_required(VERSION 2.8)
project(all)
add_subdirectory(src)
add_subdirectory(test)
What I wanted to do, was have a library created by core/CMakeLists.txt that can be used by both src/CMakeLists.txt to build the main executable, but also loaded by test/CMakeLists to build the unit tests.
So my src/core/CMakeLists.txt file currently looks sort of like this:
cmake_minimum_required(VERSION 2.8)
project(core)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wpedantic -Wreorder -DBOOST_TEST_DYN_LINK -DBOOST_LOG_DYN_LINK ")
#some other directories in my core code:
add_subdirectory(display)
add_subdirectory(training)
add_subdirectory(utility)
#some packages I use...
find_package(Boost 1.55.0
COMPONENTS
log
program_options
serialization
thread
system
filesystem
REQUIRED)
find_package(GLUT REQUIRED)
find_package(OpenGL REQUIRED)
find_package(Eigen3 REQUIRED)
include_directories(
${PROJECT_SOURCE_DIR}
${EIGEN3_INCLUDE_DIR})
target_link_libraries(core
display
training
utility
${Boost_LIBRARIES}
${OPENGL_LIBRARIES}
${GLUT_LIBRARY}
${OpenMP_LIBRARIES})
So the idea is that I now have a core target I can simply link against to run my tests, and everything should work. However, when I try to build main, for example, I get:
Cannot specify link libraries for target "core" which is not built by this
project.
I thought this might be because core doesn't have a add_library command, but if I add add_library(core) I get this error:
You have called ADD_LIBRARY for library core without any source files. This typically indicates a problem with your CMakeLists.txt file
But I don't want to add any source files; I just want this target to link the targets in the core directory and produce a target I can link against from test.
Clearly I'm missing some core knowledge here, either with cmake or the toolchain itself. Help is appreciated :)
If you only want to create a core target without source files, you need to declare it like an INTERFACE target. So, try to add the following code to your src/core/CMakeLists.txt:
cmake_minimum_required(VERSION 3.0) # REQUIRED 3.x.x version
project(core)
...
# Here declare your core_interface target
add_library(core_interface INTERFACE)
target_link_libraries(core_interface INTERFACE
display
training
utility
${Boost_LIBRARIES}
${OPENGL_LIBRARIES}
${GLUT_LIBRARY}
${OpenMP_LIBRARIES})
As you can see, if you make this, you'll need to upgrade your CMake installed version.
Then, you'll build your tests or any executable, linking with this interface target directly:
add_executable(main main.cpp)
target_link_libraries(main core_interface)
I'm trying to build an application on Linux with Qt where I can set the Cursor position. The project is managed with CMake.
CMakeLists.txt:
cmake_minimum_required(VERSION 2.8.4)
project(Project)
add_definitions(-std=gnu++14 -std=c++14 -Wall -Wextra)
set(CMAKE_PREFIX_PATH "/home/elmewo/Libraries/Qt/5.3/gcc_64")
set(CMAKE_AUTOMOC ON)
find_package(Qt5Core REQUIRED)
find_package(Qt5Quick REQUIRED)
find_package(Qt5Gui REQUIRED)
include_directories(${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)