I'm trying to build my C++ app using CMake (CLion on Windows). Application uses Thrift libraries, and those have been successfully (at least I hope so) built with Microsoft Visual 2015. I can built app with SCons:
import os
from os import path, listdir
gen_cpp = [path.join('gen-cpp', f) for f in listdir('gen-cpp') if f.endswith('.cpp')]
client_source = [path.join('logic', folder, f) for folder in ['', 'parser', 'mars', 'view']
for f in listdir(path.join('logic', folder)) if f.endswith('.cpp')]
server_source = [path.join('server', 'server.cpp')]
tests_source = [path.join('test_cases', f) for f in listdir('test_cases') if f.endswith('.cpp')]
cpppath = ['.','c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\src\\','c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\src\\thrift\\server',
'c:\\Users\\Antek\\libs\\boost_1_64_0\\boost\\']
libpath = ['C:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\x64\\Release\\', 'c:\\Users\\Antek\\libs\\boost_1_64_0\\boost\\stage\\x64\\lib\\',
'C:\\OpenSSL-Win64\\lib']
libs = ['libthrift','libssl','openssl','libcrypto']
env = Environment(CPPPATH = cpppath,
LIBS = libs,
LIBPATH = libpath,
MSVC_VERSION='14.0',
CPPFLAGS='/EHsc',
)
gen_cpp_o = env.Object(gen_cpp)
client_o = env.Object(client_source)
tests_o = env.Object(tests_source)
tests_files = gen_cpp_o + [f for f in client_o if str(f) != path.join('logic', 'main.obj')] + tests_o
env.Program('CoreWars', gen_cpp_o + client_o)
env.Program('Server', gen_cpp_o + server_source)
env.Program('tests', tests_files)
.exe files, created as a result of the 'scons' command, work perfectly fine. But, when I try to do build app with CMake, like that:
cmake_minimum_required(VERSION 3.7)
project(client)
SET (THRIFT_ROOT "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0")
SET (THRIFT_INCLUDEDIR "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\src")
SET (THRIFT_LIBRARYDIR "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\x64\\Release")
include_directories(${THRIFT_INCLUDEDIR})
MESSAGE("Thrift_LIBRARIES: ${THRIFT_LIBRARYDIR}")
MESSAGE("Thrift_INCLUDES: ${THRIFT_INCLUDEDIR}")
#find_package(Thrift REQUIRED)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
SET (BOOST_ROOT "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost")
SET (BOOST_INCLUDEDIR "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost")
SET (BOOST_LIBRARYDIR "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost\\libs")
find_package(Boost 1.64.0 REQUIRED)
include_directories(${Boost_INCLUDE_DIRS})
set(SOURCE_FILES ../gen-cpp/MARS.cpp ../gen-cpp/mars_constants.cpp ../gen-cpp/mars_types.cpp main.cpp
parser/InstructionFactory.cpp parser/RedcodeParser.cpp parser/InstructionData.cpp ServerConnector.cpp
mars/Instruction.cpp mars/InstructionOperator.cpp parser/ParserException.cpp MainController.cpp
mars/MarsSimulator.cpp Initializer.cpp Player.cpp Player.h PlayerInfo.cpp PlayerInfo.h Warrior.cpp
Warrior.h PlayerCreator.cpp PlayerCreator.h view/ViewInput.cpp view/ViewInput.h MarsResult.cpp MarsResult.h
mars/DatInstruction.cpp mars/DatInstruction.h mars/MovInstruction.cpp mars/MovInstruction.h)
add_executable(CoreWars ${SOURCE_FILES})
target_link_libraries(CoreWars ${Boost_LIBRARIES} $(THRIFT_LIBRARYDIR))
CMake reports an error:
[ 4%] Linking CXX executable CoreWars.exe
G__~1.EXE: error: $(THRIFT_LIBRARYDIR): No such file or directory
mingw32-make.exe[3]: *** [logic/CoreWars.exe] Error 1
If i try to find thrift library with find_package(Thrift REQUIRED) command, I get the following error:
CMake Error at logic/CMakeLists.txt:13 (find_package):
By not providing "FindThrift.cmake" in CMAKE_MODULE_PATH this project has
asked CMake to find a package configuration file provided by "Thrift", but
CMake did not find one.
Could not find a package configuration file provided by "Thrift" with any
of the following names:
ThriftConfig.cmake
thrift-config.cmake
I would be grateful for any help.
EDIT1:
I tried to solve my problem with the help of this question: CMake link to external library, but, unfortunately, it does not work for me.
I have edited my CMakeList.txt:
cmake_minimum_required(VERSION 3.7)
project(client)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
SET (THRIFT_ROOT "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0")
SET (THRIFT_INCLUDEDIR "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\src")
SET (THRIFT_LIBRARYDIR "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\x64\\Release")
MESSAGE("Thrift_LIBRARIES: ${THRIFT_LIBRARYDIR}")
MESSAGE("Thrift_INCLUDES: ${THRIFT_INCLUDEDIR}")
find_library(THRIFT_FOUND_LIB thrift PATHS ${THRIFT_LIBRARYDIR})
MESSAGE("Thrift found lib: ${THRIFT_FOUND_LIB}")
link_libraries(thrift "${THRIFT_FOUND_LIB}")
link_directories(${THRIFT_LIBRARYDIR})
include_directories(${THRIFT_INCLUDEDIR})
SET (BOOST_ROOT "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost")
SET (BOOST_INCLUDEDIR "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost")
SET (BOOST_LIBRARYDIR "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost\\libs")
find_package(Boost 1.64.0 REQUIRED)
include_directories(${Boost_INCLUDE_DIRS})
set(SOURCE_FILES ../gen-cpp/MARS.cpp ../gen-cpp/mars_constants.cpp ../gen-cpp/mars_types.cpp main.cpp
parser/InstructionFactory.cpp parser/RedcodeParser.cpp parser/InstructionData.cpp ServerConnector.cpp
mars/Instruction.cpp mars/InstructionOperator.cpp parser/ParserException.cpp MainController.cpp
mars/MarsSimulator.cpp Initializer.cpp Player.cpp Player.h PlayerInfo.cpp PlayerInfo.h Warrior.cpp
Warrior.h PlayerCreator.cpp PlayerCreator.h view/ViewInput.cpp view/ViewInput.h MarsResult.cpp MarsResult.h
mars/DatInstruction.cpp mars/DatInstruction.h mars/MovInstruction.cpp mars/MovInstruction.h)
add_executable(CoreWars ${SOURCE_FILES})
MESSAGE("Cmake prefix path: ${CMAKE_PREFIX_PATH}")
LINK_DIRECTORIES(${CMAKE_BINARY_DIR})
target_link_libraries(CoreWars ${Boost_LIBRARIES} thrift)
Cmake commnad find_library successfully finds my thrift. Here is CMake output:
C:\Users\Antek\AppData\Local\JetBrains\Toolbox\apps\CLion\ch-0\171.4073.41\bin\cmake\bin\cmake.exe -DCMAKE_BUILD_TYPE=Release -G "CodeBlocks - MinGW Makefiles" C:\Users\Antek\Documents\MEGAsync\_STUDIA\ZPR\proj1\Core-Wars-ZPR
Thrift_LIBRARIES: c:\Users\Antek\libs\thrift-0.10.0\thrift-0.10.0\lib\cpp\x64\Release
Thrift_INCLUDES: c:\Users\Antek\libs\thrift-0.10.0\thrift-0.10.0\lib\cpp\src
Thrift found lib: C:/Users/Antek/libs/thrift-0.10.0/thrift-0.10.0/lib/cpp/x64/Release/libthrift.lib
-- Boost version: 1.64.0
Cmake prefix path:
-- Configuring done
-- Generating done
-- Build files have been written to: C:/Users/Antek/Documents/MEGAsync/_STUDIA/ZPR/proj1/Core-Wars-ZPR/cmake-build-release
But, when I try to link my project, there is an error:
[ 4%] Linking CXX executable CoreWars.exe
C:/PROGRA~1/MINGW-~1/X86_64~1.2-P/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.9.2/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lthrift
Am I missing something? Note that thrift has been built in x64/Release mode, and I am using x64 mingw in CLion and CMake is also in release mode.
Thanks.
EDIT2:
After fiew improvements, linker seems to be able to find thrift. But, now, I get undefined reference to... error. For the thrift and also some boost libs. For example:
CMakeFiles\CoreWars.dir/objects.a(MARS.cpp.obj):MARS.cpp:(.text+0x454): undefined reference to `apache::thrift::TApplicationException::write(apache::thrift::protocol::TProtocol*) const'
and
CMakeFiles\CoreWars.dir/objects.a(MARS.cpp.obj):MARS.cpp:(.text.startup+0x11): undefined reference to `boost::system::generic_category()'
What may be the cause of this error? Shouldn't ${Boost_LIBRARIES} include also Boost.System library path? Googled solutions seem to not be appropriate in this case.
Updated CMakeLists.txt:
cmake_minimum_required(VERSION 3.7)
project(client)
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
SET (THRIFT_ROOT "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0")
SET (THRIFT_INCLUDE_DIR "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\src")
SET (THRIFT_LIB_DIR "c:\\Users\\Antek\\libs\\thrift-0.10.0\\thrift-0.10.0\\lib\\cpp\\x64\\Release")
find_library(THRIFT_FOUND_LIB thrift PATHS ${THRIFT_LIB_DIR})
MESSAGE("Found Thrift lib: ${THRIFT_FOUND_LIB}")
find_path(THRIFT_FOUND_HEADERS thrift PATHS ${THRIFT_INCLUDE_DIR})
MESSAGE("Found Thrift headers: ${THRIFT_FOUND_HEADERS}")
include_directories(${THRIFT_FOUND_HEADERS})
link_directories(${THRIFT_FOUND_HEADERS})
link_directories(${THRIFT_FOUND_LIB})
SET (BOOST_ROOT "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost")
#SET (BOOST_INCLUDEDIR "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost")
#SET (BOOST_LIBRARYDIR "c:\\Users\\Antek\\libs\\boost_1_64_0\\boost\\libs")
find_package(Boost 1.64.0 REQUIRED)
include_directories(${Boost_INCLUDE_DIRS})
link_directories(${Boost_LIBRARIES})
set(SOURCE_FILES ../gen-cpp/MARS.cpp ../gen-cpp/mars_constants.cpp ../gen-cpp/mars_types.cpp main.cpp
parser/InstructionFactory.cpp parser/RedcodeParser.cpp parser/InstructionData.cpp ServerConnector.cpp
mars/Instruction.cpp mars/InstructionOperator.cpp parser/ParserException.cpp MainController.cpp
mars/MarsSimulator.cpp Initializer.cpp Player.cpp Player.h PlayerInfo.cpp PlayerInfo.h Warrior.cpp
Warrior.h PlayerCreator.cpp PlayerCreator.h view/ViewInput.cpp view/ViewInput.h MarsResult.cpp MarsResult.h
mars/DatInstruction.cpp mars/DatInstruction.h mars/MovInstruction.cpp mars/MovInstruction.h)
add_executable(CoreWars ${SOURCE_FILES})
target_include_directories(CoreWars SYSTEM PUBLIC ${THRIFT_FOUND_HEADERS})
target_link_libraries(CoreWars LINK_PUBLIC ${THRIFT_FOUND_LIB} ${Boost_LIBRARIES} )
Thank You again.
It looks like you are passing the directory where to look for the library, but not the name of the actual library. Add this in your CMakelists.txt, it should work:
target_include_directories(${THRIFT_INCLUDEDIR})
target_link_libraries(CoreWars ${Boost_LIBRARIES} libthrift.lib) # Or may be just 'thrift'
Related
I am trying to use CMake for including Matplotlibcpp in my C++ project (I am new to both CMake and C++). I am following https://github.com/lava/matplotlib-cpp/issues/236#issuecomment-716510547 for setting up a CMake file. The project builds fine, but when I try to run the executable, here is the error I get:
dyld[73245]: symbol not found in flat namespace
'_PyCapsule_GetPointer'
zsh: abort ./data_measure_img_seq
I'm not sure how to resolve this. Any suggestions? For reference, I am putting my CMakeLists file below:
# set the minimum version
cmake_minimum_required(VERSION "3.13")
# set project
project(image-data-cv)
set(OpenCV_DIR /Users/anshgodha/Developer/opencv/install/lib/cmake/opencv4)
set(CMAKE_CXX_STANDARD 14)
find_package( OpenCV REQUIRED )
include_directories( ${OpenCV_INCLUDE_DIRS} )
# for matplotlibcpp
find_package(Python3 COMPONENTS Interpreter Development NumPy REQUIRED)
find_package(PythonLibs 3.0 REQUIRED)
include_directories(${PYTHON3_INCLUDE_DIRS} ${NumPy_INCLUDE_DIRS})
include(FetchContent)
FetchContent_Declare(
matplotlib
GIT_REPOSITORY https://github.com/lava/matplotlib-cpp.git
GIT_TAG f23347fca25219d1c42cbb91608b5556814bf572
)
FetchContent_GetProperties(matplotlib)
if(NOT matplotlib_POPULATED)
FetchContent_Populate(matplotlib)
endif()
include_directories(SYSTEM ${matplotlib_SOURCE_DIR})
set(PROJECTS basic_data_measures;data_measure_img_seq)
foreach(PROJECT ${PROJECTS})
add_executable(${PROJECT} ${PROJECT}/main.cpp)
target_link_libraries(${PROJECT} PUBLIC ${OpenCV_LIBS})
set_target_properties(${PROJECT} PROPERTIES OUTPUT_NAME "${PROJECT}")
endforeach(PROJECT ${PROJECTS})
# link python and numpy
target_link_libraries(data_measure_img_seq
PRIVATE
${PYTHON_LIBRARIES}
Python3::NumPy
)
I was having the same issue compiling using cmake. Perhaps the included cmake doesn't link everything properly. I got around it using e.g.
g++ fill.cpp -o fill -std=c++11 -I/usr/include/python2.7 -lpython2.7
I'm trying to compile my program for Windows, on Linux, so I installed the w64-mingw32 compiler via the Debian package manager. I made a separate cmakelists file where I chose x86_64-w64-mingw32-g++ as the compiler. When I try to run my build script, I get errors where it can't find the libraries that I use in my project. This is my cmake file:
cmake_minimum_required (VERSION 3.5)
if (POLICY CMP0072)
cmake_policy(SET CMP0072 NEW)
else (NOT POLICY CMP0072)
message(STATUS "Could not use CMP0072 policy")
endif(POLICY CMP0072)
project(opengl-test LANGUAGES CXX)
set(CMAKE_CXX_COMPILER "/usr/bin/x86_64-w64-mingw32-g++")
set(CMAKE_C_COMPILER "/usr/bin/x86_64-w64-mingw32-gcc")
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
include(GNUInstallDirs)
set(CMAKE_FIND_ROOT_PATH "/usr/x86_64-w64-mingw32")
set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
set (source_dir "${PROJECT_SOURCE_DIR}/src/")
set (base_dir "${source_dir}/base/")
set (IMGUI_DIR "/usr/include/imgui")
set(GCC_COVERAGE_LINK_FLAGS "")
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${GCC_COVERAGE_LINK_FLAGS}")
file(GLOB source_files "${source_dir}/*.cpp")
file(GLOB_RECURSE base_files "${base_dir}/*.cpp")
file(GLOB imgui_files "${IMGUI_DIR}/*.cpp")
find_package(OpenGL REQUIRED)
find_package(GLEW REQUIRED)
find_package(PkgConfig REQUIRED)
pkg_search_module(GLFW REQUIRED glfw3)
add_executable(${PROJECT_NAME} ${source_files} ${imgui_files} ${base_files})
#target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_17)
message(STATUS ${OPENGL_LIBRARIES})
target_link_libraries(${PROJECT_NAME} PUBLIC ${GLFW_LIBRARIES} ${OPENGL_LIBRARIES} ${GLEW_LIBRARIES})
A lot of the code in the cmakelists file doesn't do anything because I was trying to make it work but nothing was working. I left it in so you can see what I've tried and doesn't work.
I can run this and it compiles, but I get a linker error.
CMake Warning:
No source or binary directory provided. Both will be assumed to be the
same as the current working directory, but note that this warning will
become a fatal error in future CMake releases.
-- /usr/lib/x86_64-linux-gnu/libOpenGL.so/usr/lib/x86_64-linux-gnu/libGLX.so/usr/lib/x86_64-linux-gnu/libGLU.so
-- Configuring done
CMake Warning at CMakeLists.txt:38 (add_executable):
Cannot generate a safe runtime search path for target opengl-test because
files in some directories may conflict with libraries in implicit
directories:
runtime library [libGLEW.so.2.1] in /usr/lib64 may be hidden by files in:
/usr/lib/x86_64-linux-gnu
Some of these libraries may not be found correctly.
-- Generating done
-- Build files have been written to: /home/user/Documents/CPP-Stuff/Scrap-Framework
[29/29] Linking CXX executable opengl-test
FAILED: opengl-test
: && /usr/bin/x86_64-w64-mingw32-g++ -g CMakeFiles/opengl-test.dir/src/main.cpp.o CMakeFiles/opengl-test.dir/usr/include/imgui/imgui.cpp.o CMakeFiles/opengl-test.dir/usr/include/imgui/imgui_demo.cpp.o CMakeFiles/opengl-test.dir/usr/include/imgui/imgui_draw.cpp.o CMakeFiles/opengl-test.dir/usr/include/imgui/imgui_impl_glfw.cpp.o CMakeFiles/opengl-test.dir/usr/include/imgui/imgui_impl_opengl3.cpp.o CMakeFiles/opengl-test.dir/usr/include/imgui/imgui_tables.cpp.o CMakeFiles/opengl-test.dir/usr/include/imgui/imgui_widgets.cpp.o CMakeFiles/opengl-test.dir/src/base/Application/Application.cpp.o CMakeFiles/opengl-test.dir/src/base/Application/Window.cpp.o CMakeFiles/opengl-test.dir/src/base/GL/Cubemap.cpp.o CMakeFiles/opengl-test.dir/src/base/GL/Texture.cpp.o CMakeFiles/opengl-test.dir/src/base/GL/UniformBuffer.cpp.o CMakeFiles/opengl-test.dir/src/base/GL/VertexBuffer.cpp.o CMakeFiles/opengl-test.dir/src/base/Input/Input.cpp.o CMakeFiles/opengl-test.dir/src/base/Model/Material.cpp.o CMakeFiles/opengl-test.dir/src/base/Model/Mesh.cpp.o CMakeFiles/opengl-test.dir/src/base/Model/Model.cpp.o CMakeFiles/opengl-test.dir/src/base/Model/ModelLoader.cpp.o CMakeFiles/opengl-test.dir/src/base/Renderer/FPSCamera.cpp.o CMakeFiles/opengl-test.dir/src/base/Renderer/MaterialManager.cpp.o CMakeFiles/opengl-test.dir/src/base/Renderer/Renderbuffer.cpp.o CMakeFiles/opengl-test.dir/src/base/Renderer/Renderer.cpp.o CMakeFiles/opengl-test.dir/src/base/Scene/Lights.cpp.o CMakeFiles/opengl-test.dir/src/base/Scene/Scene.cpp.o CMakeFiles/opengl-test.dir/src/base/Scene/Skybox.cpp.o CMakeFiles/opengl-test.dir/src/base/Shader/Shader.cpp.o CMakeFiles/opengl-test.dir/src/base/Shader/ShaderManager.cpp.o -o opengl-test -Wl,-rpath,/usr/lib/x86_64-linux-gnu -lglfw /usr/lib/x86_64-linux-gnu/libOpenGL.so /usr/lib/x86_64-linux-gnu/libGLX.so /usr/lib/x86_64-linux-gnu/libGLU.so /usr/lib64/libGLEW.so && :
/usr/bin/x86_64-w64-mingw32-ld: cannot find -lglfw
/usr/bin/x86_64-w64-mingw32-ld: /usr/lib/x86_64-linux-gnu/libOpenGL.so: error adding symbols: file in wrong format
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
The include files are located in /usr/include/, but I also put them in /usr/x86_64-w64-mingw32/include/.
Does anyone know how I can fix this, or a better way to compile for Windows on Linux?
You need to build the libraries you're using for Windows, or find prebuilt ones, e.g. in MSYS2 repositories. You also need to point CMake to those libraries.
I've made Quasi-MSYS2 to automate both.
Example usage:
# Install Clang, LLD, Wine. Then:
git clone https://github.com/holyblackcat/quasi-msys2
cd quasi-msys2/
make install _gcc _glfw _glew
env/shell.sh
# Build
cd your/project/location
mkdir build
cd build
cmake ..
make
# Run with Wine
./a.exe
Here is CMakeLists.txt I've used. I removed the cross-compilation stuff (which is handled automatically).
cmake_minimum_required (VERSION 3.5)
if (POLICY CMP0072)
cmake_policy(SET CMP0072 NEW)
else (NOT POLICY CMP0072)
message(STATUS "Could not use CMP0072 policy")
endif(POLICY CMP0072)
project(opengl-test LANGUAGES CXX)
find_package(OpenGL REQUIRED)
find_package(GLEW REQUIRED)
find_package(PkgConfig REQUIRED)
pkg_search_module(GLFW REQUIRED glfw3)
add_executable(a 1.cpp)
message(STATUS ${OPENGL_LIBRARIES})
target_link_libraries(a PUBLIC ${GLFW_LIBRARIES} ${OPENGL_LIBRARIES} GLEW::GLEW)
I also put them in /usr/x86_64-w64-mingw32/include/
You shouldn't modify system include directories manually. Leave them to your package manager.
I'm trying to use zlib in my project. The CMakeLists.txt is as follows:
cmake_minimum_required(VERSION 3.5)
project(cmake-demo LANGUAGES CXX)
# The version number.
set(CMDemo_VERSION_MAJOR 0)
set(CMDemo_VERSION_MINOR 1)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
include(${PROJECT_SOURCE_DIR}/build/conan_paths.cmake)
set(CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/build)
find_package(uwebsockets)
#ZLIB
if(ZLIB_FOUND)
set(INC_DIRS ${INC_DIRS} ${ZLIB_INCLUDE_DIRS})
set(LINK_LIBS ${LINK_LIBS} ${ZLIB_LIBS})
endif()
# Global approach
if(uwebsockets_FOUND)
set(INC_DIRS ${INC_DIRS} ${uwebsockets_INCLUDE_DIRS})
set(LINK_LIBS ${LINK_LIBS} ${uwebsockets_LIBS})
endif()
#libuv
if(libuv_FOUND)
set(INC_DIRS ${INC_DIRS} ${libuv_INCLUDE_DIRS})
set(LINK_LIBS ${LINK_LIBS} ${libuv_LIBS})
endif()
#usockets
if(usockets_FOUND)
set(INC_DIRS ${INC_DIRS} ${usockets_INCLUDE_DIRS})
set(LINK_LIBS ${LINK_LIBS} ${usockets_LIBS})
endif()
include_directories(${INC_DIRS})
add_executable(${PROJECT_NAME} main.cpp)
message("libs=${LINK_LIBS}")
target_link_libraries(${PROJECT_NAME} ${LINK_LIBS})
#output of message("${LINK_LIBS}")
C:/ProgramData/Miniconda3/Library/lib/z.lib;C:/Users/Sunway/.conan/data/libuv/1.41.0/_/_/package/9965605309592d7e617ec929633249a2031e4263/lib/libuv_a.a;C:/Users/Sunway/.conan/data/usockets/0.7.1/_/_/package/a24f5291464b4270092bce2e738cbf9f3cd53bb7/lib/libuSockets.a
I'm sure that ${LINK_LIBS} is correct, but it still doesn't work:
CMakeFiles/cmake-demo.dir/main.cpp.obj: In function `ZN3uWS15DeflationStreamD1Ev':
C:/Users/Sunway/.conan/data/uwebsockets/19.2.0/_/_/package/5ab84d6acfe1f23c4fae0ab88f26e3a396351ac9/include/uWebSockets/PerMessageDeflate.h:186: undefined reference to `deflateEnd'
os: Windows10 x64
IDE: QtCreator4.14.2
compiler: MinGW 32-bit
The thing is, that you have to set the path to the library file as the target_link_libraries argument.
According to the documentation, if you want to link the library, each argument of target_link_libraries can be:
A library target name
A full path to a library file (e.g. /usr/lib/foo.so)
A plain library name (e.g. foo)
In your case I suggest you to add the complete path to the library.
I don't have all the code of your project, so I suggest you consider this minimal example:
add_executable(test main.cpp)
SET (ZLIB_ROOT "/tmp/zlib")
SET (ZLIB_INCLUDE_DIR "/tmp/zlib/include/")
SET (ZLIB_LIBRARY "/tmp/zlib/lib/libz.so.1.2.11")
FIND_PACKAGE (ZLIB REQUIRED)
MESSAGE (" zlib version major is " ${ZLIB_VERSION_MAJOR})
MESSAGE (" zlib version minor is " ${ZLIB_VERSION_MINOR})
MESSAGE (" zlib include is " ${ZLIB_INCLUDE_DIR})
MESSAGE (" zlib libraries are " ${ZLIB_LIBRARIES})
target_link_libraries(test ${ZLIB_LIBRARIES})
After downloading the latest zlib release and installing it in /tmp, everything works as expected.
Update: as #uilianries mentioned, since you are using conan, you have cmake_find_package generator that defines variables with all the necessary paths. So you don't need to set the paths in CMakeLists.txt manually.
It is because the libzlib.a is for x86_64 while the compiler is MinGW-32bit; I solved the problem by execute the command
$conan install .. --build=missing --pr=x86_32
the x86_64 is a profile(x86) generated by conan.
I have downloaded the HDFql library and put the whole lot in /usr/local/ in my linux system. I now wish to use this library in a ROS application, so I have tried to link it in my CMakeList, which looks as following:
cmake_minimum_required(VERSION 3.2)
project(data_generator)
add_compile_options(-std=c++11)
set(CMAKE_BUILD_TYPE Release) # Release, RelWithDebInfo
set(CMAKE_CXX_FLAGS "-std=c++11 -pthread ${CMAKE_CXX_FLAGS}")
find_package(catkin_simple REQUIRED)
catkin_simple(ALL_DEPS_REQUIRED)
find_package(OpenCV REQUIRED)
include_directories(${OpenCV_INCLUDE_DIRS})
set(HDFQL_ROOT "/usr/local/hdfql-2.1.0")
include_directories(${HDFQL_ROOT}/include)
find_library(HDFQL_LIB HDFql)
if (HDFQL_LIB)
message("Library(HDFQL_LIB) found in ${HDFQL_LIB}")
else()
message(FATAL_ERROR "Library (HDFQL_LIB) not found")
endif()
cs_add_executable(
${PROJECT_NAME}
src/main.cpp
src/data_create.cpp
src/event_definitions.cpp
)
target_include_directories(${PROJECT_NAME}
PUBLIC "${HDFQL_ROOT}/include"
)
target_link_libraries(${PROJECT_NAME}
${OpenCV_LIBRARIES}
${HDFQL_LIB}
)
# CMake Indexing
FILE(GLOB_RECURSE LibFiles "include/*")
add_custom_target(headers SOURCES ${LibFiles})
cs_install()
cs_export()
When I build this, it works fine and outputs the message:
Library(HDFQL_LIB) found in /usr/local/hdfql-2.1.0/lib/libHDFql.so
with the following in my main.cpp file:
#include <HDFql.hpp>
....
std::cout <<"HDFql version: " << HDFql::Version << std::endl;
the output is: HDFql version: 2.1.0.
However, as soon as I try to actually use functions of the library - for example:
#include <HDFql.hpp>
....
std::cout <<"HDFql version: " << HDFql::Version << std::endl;
HDFql::execute("CREATE FILE /home/user/test.h5");
I get the error:
main.cpp:(.text+0x1858): undefined reference to `HDFql::execute(char const*)'
This suggests to me that while CMake has no issue with the includes, it is having trouble linking the actual library (ie including the libHDFql.a/libHDFql.so files). Can anyone tell me what I'm doing wrong here?
Many thanks!
The problem was that I needed to include the library /usr/local/hdfql-2.1.0/wrapper/cpp/libHDFql.so, where I was using /usr/local/hdfql-2.1.0/lib/libHDFql.so. It's pretty maddening, since the reference manual doesn't make any mention of this and I spent way too long figuring this out. Ohwell, I hope this helps anyone else with this problem.
For reference, here is a minimal catkin-style CMakeLists that will work:
cmake_minimum_required(VERSION 3.2)
project(project_name)
add_compile_options(-std=c++11)
find_package(catkin_simple REQUIRED)
catkin_simple(ALL_DEPS_REQUIRED)
set(HDFQL_ROOT "path/to/hdfql-2.1.0")
include_directories(${HDFQL_ROOT}/include)
set(CMAKE_BUILD_TYPE Release)
set(CMAKE_CXX_FLAGS "-std=c++11 -pthread ${CMAKE_CXX_FLAGS}")
cs_add_executable(
${PROJECT_NAME}
# your source file 1
# your source file 2
# ...
)
target_include_directories(${PROJECT_NAME}
PUBLIC "${HDFQL_ROOT}/include"
)
target_link_libraries(
${PROJECT_NAME}
${OpenCV_LIBRARIES}
)
target_link_libraries(
${PROJECT_NAME}
"${HDFQL_ROOT}/wrapper/cpp/libHDFql.so"
)
Of course the absolute paths aren't very pretty, the alternative is to add /usr/local/hdfql-2.1.0/lib to the environment variable CMAKE_PREFIX_PATH (eg export CMAKE_PREFIX_PATH="/usr/local/hdfql-2.1.0/lib:$CMAKE_PREFIX_PATH").
I am writing a C++ project that uses Poco Net library. I use CMake to configure the project.
I would like to add Poco as a sub-directory to my project so that it is built in my main project. Here is my shortened main CMakeLists.txt
cmake_minimum_required(VERSION 3.2)
project(FunProj)
if(NOT CMAKE_BUILD_TYPE)
set(CMAKE_BUILD_TYPE "Release")
endif()
message(STATUS "Building in ${CMAKE_BUILD_TYPE} mode...")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
set(HEADER_FILES IDataProvider.h DataProvider.h)
set(SOURCE_FILES main.cpp
DataProvider.cpp)
set(POCO_STATIC ON)
ADD_SUBDIRECTORY(poco)
include_directories(${CMAKE_SOURCE_DIR}/poco/Net/include)
include_directories(${CMAKE_SOURCE_DIR}/poco/Foundation/include)
link_directories(${CMAKE_CURRENT_BINARY_DIR}/poco/lib)
add_executable(FunProj ${SOURCE_FILES} ${HEADER_FILES})
target_link_libraries(${EXEC_NAME} PocoNet)
When I run cmake it configures everything including Poco but when I run make it does not compile the Poco libraries. It only compiles the main.o and DataProvider.o and then the linker fails with an error that libPocoNet.a does not exist.
What is the problem and how may one solve it?
Thank you.