连接 Leap Motion SDK 和 Cmake

Question

我正在尝试构建一个项目，该项目在 Windows 7 上使用 Myo SDK 和 LeapMotion SDK，并使用 CMake、Qt Creator 和 MinGW 4.9.2 32 位作为编译器。

MyoSDK 工作正常，但我在 CMake 中链接 LeapMotion SDK 时遇到了一些问题。我找到了一个现有的sample CMake file，它说 Windows 部分还没有完成。

这是我的 CMakeLists.txt：

cmake_minimum_required (VERSION 2.6)

project (MyoLeapController)

#set(THALMICLABSMYO_ROOT_DIR "C:/myo-sdk-win-0.9.0")

################## MYO

if(WIN32)
    set(THALMICLABSMYO_ROOT_DIR
            "${THALMICLABSMYO_ROOT_DIR}"
            CACHE
            PATH
            "Directory to search for the Thalmic Labs Myo SDK")

    if(CMAKE_SIZEOF_VOID_P MATCHES "8")
        set(_ARCH x86_64)
    else()
        set(_ARCH x86_32)
    endif()

    set(_SDKDIR Windows)

    find_path(THALMICLABSMYO_INCLUDE_DIR
            NAMES myo/libmyo.h
            PATHS "${THALMICLABSMYO_ROOT_DIR}/include")

    include(FindPackageHandleStandardArgs)

    if(CMAKE_SIZEOF_VOID_P MATCHES "8")
        find_library(THALMICLABSMYO_LIBRARY
            NAMES myo64
            PATHS "${THALMICLABSMYO_ROOT_DIR}/lib"
            PATH_SUFFIXES "${_SDKDIR}/${_ARCH}")
    else()
        find_library(THALMICLABSMYO_LIBRARY
            NAMES myo32
            PATHS "${THALMICLABSMYO_ROOT_DIR}/lib"
            PATH_SUFFIXES "${_SDKDIR}/${_ARCH}")
    endif()

    find_package_handle_standard_args(ThalmicLabsMyo
            DEFAULT_MSG
            THALMICLABSMYO_LIBRARY
            THALMICLABSMYO_INCLUDE_DIR
            ${_deps_check})

    if(THALMICLABSMYO_FOUND)
        set(THALMICLABSMYO_LIBRARIES "${THALMICLABSMYO_LIBRARY}")
        set(THALMICLABSMYO_INCLUDE_DIRS "${THALMICLABSMYO_INCLUDE_DIR}")
        mark_as_advanced(THALMICLABSMYO_ROOT_DIR)
    endif()

    mark_as_advanced(THALMICLABSMYO_INCLUDE_DIR THALMICLABSMYO_LIBRARY)
endif()

################## LEAP

IF(LEAP_INCLUDE_DIR AND LEAP_LIBRARY)
    SET(LEAP_FIND_QUIETLY TRUE)
ENDIF(LEAP_INCLUDE_DIR AND LEAP_LIBRARY)

# Set locations to search
IF(UNIX)
    SET(LEAP_INCLUDE_SEARCH_DIRS
        /usr/include
        /usr/local/include
        /opt/leap/include
        /opt/leap_sdk/include
        /opt/include INTERNAL)
    SET(LEAP_LIBRARY_SEARCH_DIRS
        /usr/lib
        /usr/lib64
        /usr/local/lib
        /usr/local/lib64
        /opt/leap/lib
        /opt/leap/lib64
        /opt/leap_sdk/lib
        /opt/leap_sdk/lib64 INTERNAL)
    SET(LEAP_INC_DIR_SUFFIXES PATH_SUFFIXES leap)
ELSE(UNIX)
    #WIN32
    SET(LEAP_INC_DIR_SUFFIXES PATH_SUFFIXES inc)
    SET(LEAP_LIB_DIR_SUFFIXES PATH_SUFFIXES lib)
ENDIF(UNIX)

# Set name of the Leap library to use
IF(APPLE)
    SET(LEAP_LIBRARY_NAME libLeap.dylib)
ELSE(APPLE)
    IF(UNIX)
        SET(LEAP_LIBRARY_NAME libLeap.so)
    ELSE(UNIX)
        # TODO Different libraries are provided for compile and runtime
        SET(LEAP_LIBRARY_NAME libLeap.lib)
    ENDIF(UNIX)
ENDIF(APPLE)

IF(NOT LEAP_FIND_QUIETLY)
    MESSAGE(STATUS "Checking for Leap")
ENDIF(NOT LEAP_FIND_QUIETLY)

# Search for header files
FIND_PATH(LEAP_INCLUDE_DIR Leap.h
    PATHS ${LEAP_INCLUDE_SEARCH_PATHS}
    PATH_SUFFIXES ${LEAP_INC_DIR_SUFFIXES})

# Search for library
FIND_LIBRARY(LEAP_LIBRARY ${LEAP_LIBRARY_NAME}
    PATHS ${LEAP_LIBRARY_SEARCH_DIRS}
    PATH_SUFFIXES ${LEAP_LIB_DIR_SUFFIXES})

SET(LEAP_INCLUDE_DIR ${LEAP_INCLUDE_DIR} CACHE STRING
    "Directory containing LEAP header files")
SET(LEAP_LIBRARY ${LEAP_LIBRARY} CACHE STRING "Library name of Leap library")

SET(LEAP_INCLUDE_DIRS ${LEAP_INCLUDE_DIR} )
SET(LEAP_LIBRARIES ${LEAP_LIBRARY} )

INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(Leap DEFAULT_MSG LEAP_LIBRARY LEAP_INCLUDE_DIR)

MARK_AS_ADVANCED(LEAP_INCLUDE_DIR LEAP_LIBRARY)

##################

message(${LEAP_LIBRARY})
INCLUDE_DIRECTORIES(${THALMICLABSMYO_INCLUDE_DIR} ${LEAP_INCLUDE_DIRS})
add_executable(MyoLeapController main.cpp)
target_link_libraries(MyoLeapController ${THALMICLABSMYO_LIBRARY} ${LEAP_LIBRARY})

我的 CMake 输出是：

C:/LeapSDK/lib/x86/Leap.dll
-- Configuring done
-- Generating done
-- Build files have been written to: C:/Users/riecker/Documents/Masterthesis/MyoLeapController-bin

我链接找到的 Leap 库与 Myo 完全相同，但我得到了一些链接器错误。

我的 C++ 测试程序：

#include <iostream>
#include <myo/myo.hpp>
#include <Leap.h>

int main (int argc, char *argv[])
{
    //myo::Hub hub("MyoLeapController");
    Leap::Controller controller;

    std::cout << "hi" << std::endl;
    return 0;
}

错误信息：

[ 50%] Linking CXX executable MyoLeapController.exe
CMakeFiles\MyoLeapController.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x1d): undefined reference to `Leap::Controller::Controller()'
CMakeFiles\MyoLeapController.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x51): undefined reference to `Leap::Controller::~Controller()'
CMakeFiles\MyoLeapController.dir\build.make:98: recipe for target 'MyoLeapController.exe' failed
CMakeFiles\MyoLeapController.dir/objects.a(main.cpp.obj):main.cpp:(.text+0x61): undefined reference to `Leap::Controller::~Controller()'
CMakeFiles\Makefile2:66: recipe for target 'CMakeFiles/MyoLeapController.dir/all' failed
makefile:82: recipe for target 'all' failed
C:/Qt/Tools/mingw492_32/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/bin/ld.exe: CMakeFiles\MyoLeapController.dir/objects.a(main.cpp.obj): bad reloc address 0x0 in section `.ctors'
collect2.exe: error: ld returned 1 exit status
mingw32-make[2]: *** [MyoLeapController.exe] Error 1
mingw32-make[1]: *** [CMakeFiles/MyoLeapController.dir/all] Error 2
mingw32-make: *** [all] Error 2
10:56:32: Der Prozess "C:\Qt\Tools\mingw492_32\bin\mingw32-make.exe" wurde mit dem Rückgabewert 2 beendet.
Fehler beim Erstellen/Deployment des Projekts MyoLeapController (Kit: Desktop Qt 5.6.0 MinGW 32bit)
Bei der Ausführung von Schritt "Make"

Leap SDK 的包含工作正常，因为它只能在链接期间找到头文件我遇到了问题。对于包含和链接，我对正在运行的 Myo SDK 做同样的事情。

任何人都可以帮助我或对此有想法吗？谢谢

Answer 1

Leap Motion 库does not support MinGW，因此您尝试链接的库不兼容。

但是，您可以尝试this package 中的 dll。它来自this thread。它似乎只适用于 32 位，但这显然是您要构建的。

从出现错误的构建目录中，首先查看此命令行是否有效，然后您可以继续使其在您的 cmake 项目中工作：

C:\Qt\Tools\mingw492_32\bin\g++.exe -Wl,--whole-archive CMakeFiles\MyoLeapController.dir/objects.a -Wl,--no-whole-archive -o MyoLeapController.exe -Wl,--out-imlib,libMyoLeapController.dll.a -Wl,--major-image-version,0,--minor-image-version,0 -LC:/myo-sdk-win-0.9.0/lib/ -LpathToTheLeapDll -lLeap -lmyo32 -lkernel32 - luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32

如果可行，当您尝试执行可执行文件时，请确保 libLeap.dll 在您的路径或执行目录中可用。