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I'm trying to use the Boost library in my C++ project on Windows using CLion and MinGWMSVC. I downloaded the precompiled binaries here and extracted everything to C:localboost_1_69_0_b1_rc3. I setup the following CMakeLists.txt:

cmake_minimum_required(VERSION 3.11.4)

project(BoostTesting)



set(CMAKE_CXX_STANDARD 17)



set(BOOST_ROOT "C:/local/boost_1_69_0_b1_rc3")

set(BOOST_LIBRARYDIR "C:/local/boost_1_69_0_b1_rc3/lib64-msvc-14.1")

set(BOOST_INCLUDEDIR "C:/local/boost_1_69_0_b1_rc3/boost")



set(Boost_USE_STATIC_LIBS ON)

set(Boost_USE_MULTITHREADED ON)

set(Boost_USE_STATIC_RUNTIME OFF)

set(Boost_DEBUG ON)

set(Boost_DETAILED_FAILURE_MSG ON)

set(Boost_COMPILER "-vc141")

set(Boost_ARCHITECTURE "-x64")



find_package(Boost 1.69.0 COMPONENTS filesystem REQUIRED)



if (Boost_FOUND)

    include_directories(${Boost_INCLUDE_DIRS})

    add_executable(BoostTesting main.cpp)

    target_link_libraries(BoostTesting ${Boost_LIBRARIES})

endif ()

Using CMake's FindBoost debug mode (Boost_DEBUG) I got the following output:

C:UsersUserAppDataLocalJetBrainsToolboxappsCLionch-0183.4284.104bincmakewinbincmake.exe -DCMAKE_BUILD_TYPE=Debug "-DCMAKE_MAKE_PROGRAM=C:/Program Files/mingw-w64/x86_64-8.1.0-win32-seh-rt_v6-rev0/mingw64/bin/mingw32-make.exe" "-DCMAKE_C_COMPILER=C:/Program Files/mingw-w64/x86_64-8.1.0-win32-seh-rt_v6-rev0/mingw64/bin/x86_64-w64-mingw32-gcc.exe" "-DCMAKE_CXX_COMPILER=C:/Program Files/mingw-w64/x86_64-8.1.0-win32-seh-rt_v6-rev0/mingw64/bin/x86_64-w64-mingw32-g++.exe" -G "CodeBlocks - MinGW Makefiles" D:CppBoostTesting

-- The C compiler identification is GNU 8.1.0

-- The CXX compiler identification is GNU 8.1.0

-- Check for working C compiler: C:/Program Files/mingw-w64/x86_64-8.1.0-win32-seh-rt_v6-rev0/mingw64/bin/x86_64-w64-mingw32-gcc.exe

-- Check for working C compiler: C:/Program Files/mingw-w64/x86_64-8.1.0-win32-seh-rt_v6-rev0/mingw64/bin/x86_64-w64-mingw32-gcc.exe -- works

-- Detecting C compiler ABI info

-- Detecting C compiler ABI info - done

-- Detecting C compile features

-- Detecting C compile features - done

-- Check for working CXX compiler: C:/Program Files/mingw-w64/x86_64-8.1.0-win32-seh-rt_v6-rev0/mingw64/bin/x86_64-w64-mingw32-g++.exe

-- Check for working CXX compiler: C:/Program Files/mingw-w64/x86_64-8.1.0-win32-seh-rt_v6-rev0/mingw64/bin/x86_64-w64-mingw32-g++.exe -- works

-- Detecting CXX compiler ABI info

-- Detecting CXX compiler ABI info - done

-- Detecting CXX compile features

-- Detecting CXX compile features - done

CMake Warning (dev) at CMakeLists.txt:18 (find_package):

  Policy CMP0074 is not set: find_package uses <PackageName>_ROOT variables.

  Run "cmake --help-policy CMP0074" for policy details.  Use the cmake_policy

  command to set the policy and suppress this warning.



  Environment variable Boost_ROOT is set to:



    C:localboost_1_68_0boost



  For compatibility, CMake is ignoring the variable.

This warning is for project developers.  Use -Wno-dev to suppress it.



-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1125 ] _boost_TEST_VERSIONS = 

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1127 ] Boost_USE_MULTITHREADED = ON

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1129 ] Boost_USE_STATIC_LIBS = ON

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1131 ] Boost_USE_STATIC_RUNTIME = OFF

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1133 ] Boost_ADDITIONAL_VERSIONS = 

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1135 ] Boost_NO_SYSTEM_PATHS = 

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1203 ] Declared as CMake or Environmental Variables:

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1205 ]   BOOST_ROOT = C:/local/boost_1_69_0_b1_rc3

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1207 ]   BOOST_INCLUDEDIR = C:/local/boost_1_69_0_b1_rc3/boost

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1209 ]   BOOST_LIBRARYDIR = C:/local/boost_1_69_0_b1_rc3/lib64-msvc-14.1

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1211 ] _boost_TEST_VERSIONS = 

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1286 ] Include debugging info:

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1288 ]   _boost_INCLUDE_SEARCH_DIRS = C:/local/boost_1_69_0_b1_rc3/boost;C:/local/boost_1_69_0_b1_rc3/include;C:/local/boost_1_69_0_b1_rc3;PATHS;C:/boost/include;C:/boost;/sw/local/include

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1290 ]   _boost_PATH_SUFFIXES = 

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1310 ] location of version.hpp: C:/local/boost_1_69_0_b1_rc3/boost/version.hpp

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1334 ] version.hpp reveals boost 1.69.0

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1410 ] using user-specified Boost_COMPILER = -vc141

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1430 ] _boost_MULTITHREADED = -mt

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1506 ] _boost_RELEASE_ABI_TAG = -

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1508 ] _boost_DEBUG_ABI_TAG = -d

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1571 ] _boost_LIBRARY_SEARCH_DIRS_RELEASE = C:/local/boost_1_69_0_b1_rc3/lib64-msvc-14.1;C:/local/boost_1_69_0_b1_rc3/lib;C:/local/boost_1_69_0_b1_rc3/stage/lib;C:/local/boost_1_69_0_b1_rc3/lib;C:/local/boost_1_69_0_b1_rc3/../lib;C:/local/boost_1_69_0_b1_rc3/stage/lib;PATHS;C:/boost/lib;C:/boost;/sw/local/lib_boost_LIBRARY_SEARCH_DIRS_DEBUG   = C:/local/boost_1_69_0_b1_rc3/lib64-msvc-14.1;C:/local/boost_1_69_0_b1_rc3/lib;C:/local/boost_1_69_0_b1_rc3/stage/lib;C:/local/boost_1_69_0_b1_rc3/lib;C:/local/boost_1_69_0_b1_rc3/../lib;C:/local/boost_1_69_0_b1_rc3/stage/lib;PATHS;C:/boost/lib;C:/boost;/sw/local/lib

CMake Warning at C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:847 (message):

  New Boost version may have incorrect or missing dependencies and imported

  targets

Call Stack (most recent call first):

  C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:963 (_Boost_COMPONENT_DEPENDENCIES)

  C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1622 (_Boost_MISSING_DEPENDENCIES)

  CMakeLists.txt:18 (find_package)





CMake Warning at C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:847 (message):

  New Boost version may have incorrect or missing dependencies and imported

  targets

Call Stack (most recent call first):

  C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:963 (_Boost_COMPONENT_DEPENDENCIES)

  C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1622 (_Boost_MISSING_DEPENDENCIES)

  CMakeLists.txt:18 (find_package)





-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1760 ] Searching for FILESYSTEM_LIBRARY_RELEASE: libboost_filesystem-vc141-mt-1_69;libboost_filesystem-vc141-mt;libboost_filesystem-mt-1_69;libboost_filesystem-mt;libboost_filesystem

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1813 ] Searching for FILESYSTEM_LIBRARY_DEBUG: libboost_filesystem-vc141-mt-d-1_69;libboost_filesystem-vc141-mt-d;libboost_filesystem-mt-d-1_69;libboost_filesystem-mt-d;libboost_filesystem-mt;libboost_filesystem

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1760 ] Searching for SYSTEM_LIBRARY_RELEASE: libboost_system-vc141-mt-1_69;libboost_system-vc141-mt;libboost_system-mt-1_69;libboost_system-mt;libboost_system

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1813 ] Searching for SYSTEM_LIBRARY_DEBUG: libboost_system-vc141-mt-d-1_69;libboost_system-vc141-mt-d;libboost_system-mt-d-1_69;libboost_system-mt-d;libboost_system-mt;libboost_system

-- [ C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:1887 ] Boost_FOUND = 1

CMake Error at C:/Users/User/AppData/Local/JetBrains/Toolbox/apps/CLion/ch-0/183.4284.104/bin/cmake/win/share/cmake-3.12/Modules/FindBoost.cmake:2048 (message):

  Unable to find the requested Boost libraries.



  Boost version: 1.69.0



  Boost include path: C:/local/boost_1_69_0_b1_rc3



  Could not find the following static Boost libraries:



          boost_filesystem



  Some (but not all) of the required Boost libraries were found.  You may

  need to install these additional Boost libraries.  Alternatively, set

  BOOST_LIBRARYDIR to the directory containing Boost libraries or BOOST_ROOT

  to the location of Boost.

Call Stack (most recent call first):

  CMakeLists.txt:18 (find_package)





-- Configuring incomplete, errors occurred!

See also "D:/Cpp/BoostTesting/cmake-build-debug/CMakeFiles/CMakeOutput.log".



[Failed to reload]

CMake is looking for those specific files but I noticed that the -x64 indication is not part of the searched file names. My directory only contains 64-bit libraries:

Why is the Boost_ARCHITECTURE environment variable ignored? I expect it to add the missing -x64 to the searched file names. If I manually rename the libboost_filesystem-vc141-mt*.lib files they can be found by CMake. However, if I compile and link my simple main.cpp I'm getting a linker error:

====================[ Build | BoostTesting | Debug ]============================

C:UsersUserAppDataLocalJetBrainsToolboxappsCLionch-0183.4284.104bincmakewinbincmake.exe --build D:CppBoostTestingcmake-build-debug --target BoostTesting -- -j 4

Scanning dependencies of target BoostTesting

[ 50%] Building CXX object CMakeFiles/BoostTesting.dir/main.cpp.obj

[100%] Linking CXX executable BoostTesting.exe

CMakeFilesBoostTesting.dir/objects.a(main.cpp.obj): In function `boost::filesystem::path_traits::convert(char const*, std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >&)':

C:/local/boost_1_69_0_b1_rc3/boost/filesystem/path.hpp:997: undefined reference to `boost::filesystem::path::codecvt()'

C:/local/boost_1_69_0_b1_rc3/boost/filesystem/path.hpp:997: undefined reference to `boost::filesystem::path_traits::convert(char const*, char const*, std::__cxx11::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> >&, std::codecvt<wchar_t, char, int> const&)'

CMakeFilesBoostTesting.dir/objects.a(main.cpp.obj): In function `boost::filesystem::file_size(boost::filesystem::path const&)':

C:/local/boost_1_69_0_b1_rc3/boost/filesystem/operations.hpp:616: undefined reference to `boost::filesystem::detail::file_size(boost::filesystem::path const&, boost::system::error_code*)'

collect2.exe: error: ld returned 1 exit status

mingw32-make.exe[3]: *** [CMakeFilesBoostTesting.dirbuild.make:88: BoostTesting.exe] Error 1

mingw32-make.exe[2]: *** [CMakeFilesMakefile2:72: CMakeFiles/BoostTesting.dir/all] Error 2

mingw32-make.exe[1]: *** [CMakeFilesMakefile2:84: CMakeFiles/BoostTesting.dir/rule] Error 2

mingw32-make.exe: *** [Makefile:117: BoostTesting] Error 2

main.cpp source code:

#include <iostream>

#include <boost/filesystem.hpp>



using namespace boost::filesystem;



int main(int argc, char *argv) {

    if (argc < 2) {

        std::cout << "Usage: tut1 pathn";

        return 1;

    }

    std::cout << argv[1] << " " << file_size(argv[1]) << 'n';

    return 0;

}

I'm pretty sure renaming the files is not the proper way of doing it. But even this way it doesn't work. What am I doing wrong and how do you properly use Boost in a simple C++ project like this one?

I believe find_package(Boost ...) has failed in your case as it won't be able to find the REQUIRED filesystem library for 64-bit GCC.

Make sure you have the GCC build of Boost available as well, because now you're only showing the V++ libraries.

It turns out it works when using the MinGW distribution with built-in Boost.

CMakeLists.txt:

cmake_minimum_required(VERSION 3.11.4)

project(BoostTesting)



set(CMAKE_CXX_STANDARD 17)



if(WIN32)

    set(BOOST_ROOT "C:/MinGW")

endif ()



find_package(Boost 1.67.0 COMPONENTS filesystem REQUIRED)



if (Boost_FOUND)

    include_directories(${Boost_INCLUDE_DIRS})

    add_executable(BoostTesting main.cpp)

    target_link_libraries(BoostTesting ${Boost_LIBRARIES})

endif ()

main.cpp output:

D:CppBoostTestingcmake-build-debugBoostTesting.exe

Usage: tut1 path



Process finished with exit code 1

It compiled and linked successfully.