Issue
I am trying to build my application using CMake on Windows. I use 3 3rd party lib: Nlohmann Json and Curl which I linked via Vcpkg and mysql-connector-cpp for which I used the msi installer.
This is my CMakeLists.txt
cmake_minimum_required(VERSION 3.15)
project(SpeedyGo)
set(CMAKE_PREFIX_PATH
"C:/vcpkg/installed/x86-windows"
"C:/vcpkg/packages/nlohmann-json_x86-windows/share/nlohmann_json"
"C:/vcpkg/packages/curl_x86-windows/share/curl"
"C:/Program Files/MySQL/MySQL Connector C++ 8.1"
)
find_package(CURL CONFIG REQUIRED)
find_package(nlohmann_json CONFIG REQUIRED)
add_executable(main main.cpp)
target_include_directories(main PRIVATE
"C:/Program Files/MySQL/MySQL Connector C++ 8.1/include"
${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/include
)
target_link_libraries(main PRIVATE CURL::libcurl)
target_link_libraries(main PRIVATE nlohmann_json::nlohmann_json)
target_link_libraries(main PRIVATE mysqlcppconn8)
target_link_libraries(main PRIVATE
-L"C:/vcpkg/installed/x86-windows/bin"
-L"C:/Program Files/MySQL/MySQL Connector C++ 8.1/lib64/vs14"
)
This is my vcpkg.json where I setup the lib I needed to install:
cmake_minimum_required(VERSION 3.15)
project(SpeedyGo)
set(CMAKE_PREFIX_PATH
"C:/vcpkg/installed/x86-windows"
"C:/vcpkg/packages/nlohmann-json_x86-windows/share/nlohmann_json"
"C:/vcpkg/packages/curl_x86-windows/share/curl"
"C:/Program Files/MySQL/MySQL Connector C++ 8.1"
)
find_package(CURL CONFIG REQUIRED)
find_package(nlohmann_json CONFIG REQUIRED)
add_executable(main main.cpp)
target_include_directories(main PRIVATE
"C:/Program Files/MySQL/MySQL Connector C++ 8.1/include"
${_VCPKG_INSTALLED_DIR}/${VCPKG_TARGET_TRIPLET}/include
)
target_link_libraries(main PRIVATE CURL::libcurl)
target_link_libraries(main PRIVATE nlohmann_json::nlohmann_json)
target_link_libraries(main PRIVATE mysqlcppconn8)
target_link_libraries(main PRIVATE
-L"C:/vcpkg/installed/x86-windows/bin"
-L"C:/Program Files/MySQL/MySQL Connector C++ 8.1/lib64/vs14"
)
The .vscode config file (c_cpp_properties.json):
{
"configurations": [
{
"name": "Win32",
"includePath": [
"${workspaceFolder}/**",
"${vcpkgRoot}/x64-windows/include",
"${vcpkgRoot}/x86-windows/include",
"C:/vcpkg/installed/x86-windows/include",
"C:/vcpkg/packages/nlohmann-json_x86-windows/include",
"C:/vcpkg/packages/curl_x86-windows/include",
"C:/Program Files/MySQL/MySQL Connector C++ 8.1/include"
],
"defines": [
"_DEBUG",
"UNICODE",
"_UNICODE"
],
"windowsSdkVersion": "10.0.22621.0",
"compilerPath": "C:/Mingw/bin/g++.exe",
"cStandard": "c17",
"cppStandard": "c++17",
"intelliSenseMode": "${default}",
"configurationProvider": "ms-vscode.cmake-tools"
}
],
"version": 4
}
This is the settings.json file:
{
"cmake.configureArgs": [
"-DCMAKE_TOOLCHAIN_FILE=C:\\vcpkg\\scripts\\buildsystems\\vcpkg.cmake"
],
"files.associations": {
"*.json": "jsonc",
"iomanip": "cpp",
"new": "cpp",
"array": "cpp",
"atomic": "cpp",
"*.tcc": "cpp",
"bitset": "cpp",
"cctype": "cpp",
"chrono": "cpp",
"clocale": "cpp",
"cmath": "cpp",
"codecvt": "cpp",
"condition_variable": "cpp",
"cstdarg": "cpp",
"cstddef": "cpp",
"cstdint": "cpp",
"cstdio": "cpp",
"cstdlib": "cpp",
"cstring": "cpp",
"ctime": "cpp",
"cwchar": "cpp",
"cwctype": "cpp",
"deque": "cpp",
"forward_list": "cpp",
"list": "cpp",
"unordered_map": "cpp",
"unordered_set": "cpp",
"vector": "cpp",
"exception": "cpp",
"algorithm": "cpp",
"any": "cpp",
"functional": "cpp",
"iterator": "cpp",
"map": "cpp",
"memory": "cpp",
"memory_resource": "cpp",
"numeric": "cpp",
"optional": "cpp",
"random": "cpp",
"ratio": "cpp",
"set": "cpp",
"string": "cpp",
"string_view": "cpp",
"system_error": "cpp",
"tuple": "cpp",
"type_traits": "cpp",
"utility": "cpp",
"fstream": "cpp",
"initializer_list": "cpp",
"iosfwd": "cpp",
"iostream": "cpp",
"istream": "cpp",
"limits": "cpp",
"mutex": "cpp",
"ostream": "cpp",
"sstream": "cpp",
"stdexcept": "cpp",
"streambuf": "cpp",
"thread": "cpp",
"cinttypes": "cpp",
"typeinfo": "cpp",
"valarray": "cpp"
},
"cmake.sourceDirectory": "C:/Users/Sorin/Documents/GitHub/SpeedyGo/src",
"cmake.configureSettings": {
"VCPKG_TARGET_TRIPLET": "x86-windows"
}
}
The CMake config process works just fine:
[main] Configuring project: SpeedyGo
[driver] Removing c:/Users/Sorin/Documents/GitHub/SpeedyGo/build/CMakeCache.txt
[driver] Removing c:\Users\Sorin\Documents\GitHub\SpeedyGo\build\CMakeFiles
[proc] Executing command: C:\cmake\bin\cmake.EXE --no-warn-unused-cli -DCMAKE_TOOLCHAIN_FILE=C:\vcpkg\scripts\buildsystems\vcpkg.cmake -DCMAKE_BUILD_TYPE:STRING=Debug -DVCPKG_TARGET_TRIPLET:STRING=x86-windows -DCMAKE_EXPORT_COMPILE_COMMANDS:BOOL=TRUE -DCMAKE_C_COMPILER:FILEPATH=C:\MinGW\bin\gcc.exe -DCMAKE_CXX_COMPILER:FILEPATH=C:\MinGW\bin\g++.exe -SC:/Users/Sorin/Documents/GitHub/SpeedyGo/src -Bc:/Users/Sorin/Documents/GitHub/SpeedyGo/build -G "MinGW Makefiles"
[cmake] Not searching for unused variables given on the command line.
[cmake] -- Running vcpkg install
[cmake] Detecting compiler hash for triplet x64-windows...
[cmake] Detecting compiler hash for triplet x86-windows...
[cmake] All requested packages are currently installed.
[cmake] Total install time: 300 ns
[cmake] curl provides CMake targets:
[cmake]
[cmake] # this is heuristically generated, and may not be correct
[cmake] find_package(CURL CONFIG REQUIRED)
[cmake] target_link_libraries(main PRIVATE CURL::libcurl)
[cmake]
[cmake] The package nlohmann-json provides CMake targets:
[cmake]
[cmake] find_package(nlohmann_json CONFIG REQUIRED)
[cmake] target_link_libraries(main PRIVATE nlohmann_json::nlohmann_json)
[cmake]
[cmake] The package nlohmann-json can be configured to not provide implicit conversions via a custom triplet file:
[cmake]
[cmake] set(nlohmann-json_IMPLICIT_CONVERSIONS OFF)
[cmake]
[cmake] For more information, see the docs here:
[cmake]
[cmake] https://json.nlohmann.me/api/macros/json_use_implicit_conversions/
[cmake]
[cmake] -- Running vcpkg install - done
[cmake] -- The C compiler identification is GNU 6.3.0
[cmake] -- The CXX compiler identification is GNU 6.3.0
[cmake] -- Detecting C compiler ABI info
[cmake] -- Detecting C compiler ABI info - done
[cmake] -- Check for working C compiler: C:/MinGW/bin/gcc.exe - skipped
[cmake] -- Detecting C compile features
[cmake] -- Detecting C compile features - done
[cmake] -- Detecting CXX compiler ABI info
[cmake] -- Detecting CXX compiler ABI info - done
[cmake] -- Check for working CXX compiler: C:/MinGW/bin/g++.exe - skipped
[cmake] -- Detecting CXX compile features
[cmake] -- Detecting CXX compile features - done
[cmake] -- Found ZLIB: optimized;C:/Users/Sorin/Documents/GitHub/SpeedyGo/build/vcpkg_installed/x86-windows/lib/zlib.lib;debug;C:/Users/Sorin/Documents/GitHub/SpeedyGo/build/vcpkg_installed/x86-windows/debug/lib/zlibd.lib (found suitable version "1.2.13", minimum required is "1")
[cmake] -- Found nlohmann_json: C:/vcpkg/installed/x86-windows/share/nlohmann_json/nlohmann_jsonConfig.cmake (found version "3.11.2")
[cmake] -- Configuring done (12.6s)
[cmake] -- Generating done (0.0s)
[cmake] -- Build files have been written to: C:/Users/Sorin/Documents/GitHub/SpeedyGo/build
** !!!!!!!!!!!!!!-The BUILD ERROR i am getting-!!!!!!!!!!!!!!:**
[main] Building folder: SpeedyGo
[build] Starting build
[proc] Executing command: C:\cmake\bin\cmake.EXE --build c:/Users/Sorin/Documents/GitHub/SpeedyGo/build --config Debug --target all -j 14 --
[build] [ 50%] Building CXX object CMakeFiles/main.dir/main.cpp.obj
[build] [100%] Linking CXX executable main.exe
[build] CMakeFiles\main.dir/objects.a(main.cpp.obj): In function `check_lib':
[build] C:/PROGRA~1/MySQL/MYSQLC~1.1/include/jdbc/cppconn/driver.h:82: undefined reference to `check(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
[build] C:/PROGRA~1/MySQL/MYSQLC~1.1/include/jdbc/cppconn/driver.h:83: undefined reference to `check(std::map<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::less<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > >, std::allocator<std::pair<std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > > > > const&)'
[build] CMakeFiles\main.dir/objects.a(main.cpp.obj): In function `get_driver_instance_by_name':
[build] C:/PROGRA~1/MySQL/MYSQLC~1.1/include/jdbc/cppconn/driver.h:95: undefined reference to `_get_driver_instance_by_name'
[build] CMakeFiles\main.dir/objects.a(main.cpp.obj): In function `get_driver_instance_by_name':
[build] C:/PROGRA~1/MySQL/MYSQLC~1.1/include/jdbc/mysql_driver.h:116: undefined reference to `sql::mysql::_get_driver_instance_by_name(char const*)'
[build] collect2.exe: error: ld returned 1 exit status
[build] mingw32-make.exe[2]: *** [main.exe] Error 1
[build] CMakeFiles\main.dir\build.make:99: recipe for target 'main.exe' failed
[build] mingw32-make.exe[1]: *** [CMakeFiles/main.dir/all] Error 2
[build] CMakeFiles\Makefile2:81: recipe for target 'CMakeFiles/main.dir/all' failed
[build] mingw32-make.exe: *** [all] Error 2
[build] Makefile:89: recipe for target 'all' failed
[proc] The command: C:\cmake\bin\cmake.EXE --build c:/Users/Sorin/Documents/GitHub/SpeedyGo/build --config Debug --target all -j 14 -- exited with code: 2
[driver] Build completed: 00:00:06.413
[build] Build finished with exit code 2
I tried including varius include folders and also trying diffrent things in the CMakeLists.txt. I don't really know how to solve this. Also the problem seems to only be for mysql-connector-cpp lib.
My github prj. if you want to check out my code: https://github.com/sorin373/SpeedyGo/tree/main. I am open to any suggestions!
PS: The app was firstly built on LINUX, Ubunutu where it works perfectly and I later decided to make it Windows comaptible. (I am using Windows 10 and all software is up to date(double checked))
Thanks for the help :D
Solution
remove all your nonsense:
setting CMAKE_PREFIX_PATH using absolute PATHs or CMake variables reflecting an absolute path!
None of the above are needed. You only require targets.Wrong triplet:
[cmake] Detecting compiler hash for triplet x64-windows...
[cmake] Detecting compiler hash for triplet x86-windows...
are not meant for use with MinGW and not link compatible.
You probably wantx86-mingw-dynamicset viaVCPKG_TARGET_TRIPLETandVCPKG_HOST_TRIPLETMYSQL Connector (
mysql-connector-cpp) is also available through vcpkg you probably want to use it
Answered By - Alexander Neumann Answer Checked By - Marilyn (WPSolving Volunteer)
