macosx + conan + cmake 构建导致未定义的体系结构符号 x86_64？

Question

我一直在包装一些柯南食谱并取得了不同程度的成功..但现在特别卡在一个包裹上

https://github.com/smasherprog/screen_capture_lite/issues/115

conanfile.py

from conans import ConanFile, CMake, tools


class ScreenCapLiteConan(ConanFile):
    name = "ScreenCaptureLite"
    version = "11.0.0"
    license = "MIT"
    author = "smasherprog@gmail.com"
    url = "https://github.com/smasherprog/screen_capture_lite/"
    description = "Capture screen grabs in C++"
    topics = ("screengrab", "capture")
    settings = "os", "compiler", "build_type", "arch"
    options = {"shared": [True, False]}
    default_options = {"shared": False}
    generators = "cmake"

    def source(self):
        self.run("git clone --depth 1 --branch v11.0.0 git@github.com:smasherprog/screen_capture_lite.git")

    def build(self):
        cmake = CMake(self)
        cmake.configure(source_folder="screen_capture_lite")
        cmake.build()

    def package(self):
        self.copy("*.h", dst="include", src="screen_capture_lite/include", keep_path=False)
        self.copy("*hello.lib", dst="lib", keep_path=False)
        self.copy("*.dll", dst="bin", keep_path=False)
        self.copy("*.so", dst="lib", keep_path=False)
        self.copy("*.dylib", dst="lib", keep_path=False)
        self.copy("*.a", dst="lib", keep_path=False)

    def package_info(self):
        self.cpp_info.libs = ["ScreenCaptureLite"]

这很好地上传到我的注册表，我可以看到确实有某种形式的 libscreen_cab.a 保存了

但是当我尝试使用这个库在新项目中创建库示例时..它出错了

CMakeLists.txt（消费项目）

cmake_minimum_required(VERSION 2.8.12)
project(scl_app_server)
add_compile_options(-std=c++17)

# Using the "cmake" generator
include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
conan_basic_setup(TARGETS)

FILE ( GLOB SCL_APP_SRC src/*.cpp )

add_executable(scl_app_server ${SCL_APP_SRC} )
target_link_libraries(scl_app_server pthread CONAN_PKG::ScreenCaptureLite)

下面是我conan install下面

之后发生的事情

[requires]
ScreenCaptureLite/11.0.0@namespace/prod

[generators]
cmake

执行的命令发出错误

cmake .. -DCMAKE_BUILD_TYPE=Release
cmake --build .
-- The C compiler identification is AppleClang 13.0.0.13000029
-- The CXX compiler identification is AppleClang 13.0.0.13000029
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Conan: Adjusting output directories
-- Conan: Using cmake targets configuration
-- Library libscreen_capture found /Users/emcp/.conan/data/libscreen_capture/11.0.0/prod/package/2cd20192e71f56e1115fbdc2ebf2871bb61152e4/lib/liblibscreen_capture.a
-- Conan: Adjusting default RPATHs Conan policies
-- Conan: Adjusting language standard
-- Current conanbuildinfo.cmake directory: /Users/emcp/Dev/git/screen-cap-lite-server/build
-- Configuring done
-- Generating done
-- Build files have been written to: /Users/emcp/Dev/git/screen-cap-lite-server/build
[ 33%] Building CXX object CMakeFiles/scl_app_server.dir/src/Screen_Capture_Example.cpp.o
[ 66%] Building CXX object CMakeFiles/scl_app_server.dir/src/lodepng.cpp.o
[100%] Linking CXX executable bin/scl_app_server
Undefined symbols for architecture x86_64:
  "_CFDataGetBytePtr", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CFDataGetLength", referenced from:
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CFRelease", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
      _SLScreen_Capture_GetCurrentMouseImage in liblibscreen_capture.a(NSMouseCapture.m.o)
  "_CGDataProviderCopyData", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CGDisplayBounds", referenced from:
      SL::Screen_Capture::GetMonitors() in liblibscreen_capture.a(GetMonitors.cpp.o)
  "_CGDisplayCopyDisplayMode", referenced from:
      SL::Screen_Capture::GetMonitors() in liblibscreen_capture.a(GetMonitors.cpp.o)
  "_CGDisplayCreateImage", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
  "_CGDisplayCreateImageForRect", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
  "_CGDisplayMirrorsDisplay", referenced from:
      SL::Screen_Capture::GetMonitors() in liblibscreen_capture.a(GetMonitors.cpp.o)
  "_CGDisplayModeGetPixelHeight", referenced from:
      SL::Screen_Capture::GetMonitors() in liblibscreen_capture.a(GetMonitors.cpp.o)
  "_CGDisplayModeGetPixelWidth", referenced from:
      SL::Screen_Capture::GetMonitors() in liblibscreen_capture.a(GetMonitors.cpp.o)
  "_CGDisplayModeRelease", referenced from:
      SL::Screen_Capture::GetMonitors() in liblibscreen_capture.a(GetMonitors.cpp.o)
  "_CGEventCreate", referenced from:
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CGEventGetLocation", referenced from:
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CGGetActiveDisplayList", referenced from:
      SL::Screen_Capture::GetMonitors() in liblibscreen_capture.a(GetMonitors.cpp.o)
  "_CGImageGetBitsPerPixel", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
  "_CGImageGetBytesPerRow", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
  "_CGImageGetDataProvider", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CGImageGetHeight", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CGImageGetWidth", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CGImageRelease", referenced from:
      SL::Screen_Capture::CGFrameProcessor::ProcessFrame(SL::Screen_Capture::Monitor const&) in liblibscreen_capture.a(CGFrameProcessor.cpp.o)
      SL::Screen_Capture::NSMouseProcessor::ProcessFrame() in liblibscreen_capture.a(NSMouseProcessor.cpp.o)
  "_CGImageSourceCreateImageAtIndex", referenced from:
      _SLScreen_Capture_GetCurrentMouseImage in liblibscreen_capture.a(NSMouseCapture.m.o)
  "_CGImageSourceCreateWithData", referenced from:
      _SLScreen_Capture_GetCurrentMouseImage in liblibscreen_capture.a(NSMouseCapture.m.o)
  "_OBJC_CLASS_$_NSApplication", referenced from:
      objc-class-ref in liblibscreen_capture.a(NSMouseCapture.m.o)
  "_OBJC_CLASS_$_NSCursor", referenced from:
      objc-class-ref in liblibscreen_capture.a(NSMouseCapture.m.o)
  "_objc_autoreleasePoolPop", referenced from:
      _SLScreen_Capture_GetCurrentMouseImage in liblibscreen_capture.a(NSMouseCapture.m.o)
  "_objc_autoreleasePoolPush", referenced from:
      _SLScreen_Capture_GetCurrentMouseImage in liblibscreen_capture.a(NSMouseCapture.m.o)
  "_objc_msgSend", referenced from:
      _SLScreen_Capture_InitMouseCapture in liblibscreen_capture.a(NSMouseCapture.m.o)
      _SLScreen_Capture_GetCurrentMouseImage in liblibscreen_capture.a(NSMouseCapture.m.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [bin/scl_app_server] Error 1
make[1]: *** [CMakeFiles/scl_app_server.dir/all] Error 2
make: *** [all] Error 2

编辑：

似乎作者回到了我身边并告诉我我需要添加一些东西..我不确定如何将它添加到基于柯南的 CMakeLists.txt 但它都是苹果的东西

https://github.com/smasherprog/screen_capture_lite/blob/master/Example_CPP/CMakeLists.txt

project(screen_capture_example_cpp)

if(WIN32)
    set(${PROJECT_NAME}_PLATFORM_LIBS Dwmapi)
    add_definitions(-DNOMINMAX)
elseif(APPLE)
    find_package(Threads REQUIRED)
    find_library(corefoundation_lib CoreFoundation REQUIRED)
    find_library(cocoa_lib Cocoa REQUIRED)
    find_library(coremedia_lib CoreMedia REQUIRED)
    find_library(avfoundation_lib AVFoundation REQUIRED)
    find_library(coregraphics_lib CoreGraphics REQUIRED)
    find_library(corevideo_lib CoreVideo REQUIRED)
   
    set(${PROJECT_NAME}_PLATFORM_LIBS
        ${CMAKE_THREAD_LIBS_INIT}
        ${corefoundation_lib}
        ${cocoa_lib}
        ${coremedia_lib}
        ${avfoundation_lib}
        ${coregraphics_lib}  
        ${corevideo_lib}
    ) 
else()
    find_package(X11 REQUIRED)
    if(!X11_XTest_FOUND)
        message(FATAL_ERROR "X11 extensions are required, but not found!")
    endif()
    if(!X11_Xfixes_LIB)
        message(FATAL_ERROR "X11 fixes extension is required, but not found!")
    endif()
    find_package(Threads REQUIRED)
    set(${PROJECT_NAME}_PLATFORM_LIBS
        ${X11_LIBRARIES}
        ${X11_Xfixes_LIB}
        ${X11_XTest_LIB}
        ${X11_Xinerama_LIB}
        ${CMAKE_THREAD_LIBS_INIT}
    )
endif()

include_directories(
    ../include 
) 

add_executable(${PROJECT_NAME}_static
    lodepng.cpp
    Screen_Capture_Example.cpp
)
target_link_libraries(${PROJECT_NAME}_static screen_capture_lite_static ${${PROJECT_NAME}_PLATFORM_LIBS})  

add_executable(${PROJECT_NAME}_shared  
    lodepng.cpp
    Screen_Capture_Example.cpp
)

target_link_libraries(${PROJECT_NAME}_shared screen_capture_lite_shared ${${PROJECT_NAME}_PLATFORM_LIBS}) 

install (TARGETS ${PROJECT_NAME}_static ${PROJECT_NAME}_shared screen_capture_lite_shared
    RUNTIME DESTINATION Examples
)

我是否只将这些行添加到我的 CMakeLists.txt 中？

Answer 1

事实证明我从 github 中提取的版本非常古老..一旦我更新了我的食谱以提取最新版本..很明显我的消费 CMakeLists.txt 丢失了各种苹果库..

我稍微修改了作者的原作..添加了柯南逻辑..最重要的是学会了如何添加逻辑，以便在您需要静态或动态库时柯南有意义

我的conanfile.py

from conans import ConanFile, CMake, tools


class ScreenCapLiteConan(ConanFile):
    name = "screen_capture_lite"
    version = "17.1.439"
    license = "MIT"
    author = "smasherprog@gmail.com"
    url = "https://github.com/smasherprog/screen_capture_lite"
    description = "Capture screen grabs in Mac OSX"
    topics = ("screengrab", "capture")
    settings = "os", "compiler", "build_type", "arch"
    options = {"shared": [True, False]}
    default_options = {"shared": False}
    generators = "cmake"

    def source(self):
        self.run("git clone --depth 1 --branch 17.1.439 git@github.com:smasherprog/screen_capture_lite.git")

    def build(self):
        cmake = CMake(self)
        cmake.configure(source_folder="screen_capture_lite")
        cmake.build()

    def package(self):
        self.copy("*.h", dst="include", src="screen_capture_lite/include")
        self.copy("*hello.lib", dst="lib", keep_path=False)
        self.copy("*.dll", dst="bin", keep_path=False)
        self.copy("*.so", dst="lib", keep_path=False)
        self.copy("*.dylib", dst="lib", keep_path=False)
        self.copy("*.a", dst="lib", keep_path=False)

    def package_info(self):
        if self.settings.os == "Macos":
            self.cpp_info.libs = ["libscreen_capture_lite_static.a"] if not self.options.shared else ["libscreen_capture_lite_shared.dylib"]
        elif self.settings.os == "Linux":
            self.cpp_info.libs = ["libscreen_capture_lite_static.a"] if not self.options.shared else ["libscreen_capture_lite_shared.so"]

请注意我必须为不同库添加逻辑的最后几行

那么我的消费项目只需要以下内容

conanfile.txt

[requires]
screen_capture_lite/17.1.439@emcp/prod

[generators]
cmake

[options]
screen_capture_lite:shared=False

CMakeLists.txt

cmake_minimum_required(VERSION 2.8.12)
project(osx_screengrabber)
add_compile_options(-std=c++17)

# Using the "cmake" generator
include(${CMAKE_BINARY_DIR}/conanbuildinfo.cmake)
conan_basic_setup(TARGETS)

if(WIN32)
    set(${PROJECT_NAME}_PLATFORM_LIBS Dwmapi)
    add_definitions(-DNOMINMAX)
elseif(APPLE)
    find_package(Threads REQUIRED)
    find_library(corefoundation_lib CoreFoundation REQUIRED)
    find_library(cocoa_lib Cocoa REQUIRED)
    find_library(coremedia_lib CoreMedia REQUIRED)
    find_library(avfoundation_lib AVFoundation REQUIRED)
    find_library(coregraphics_lib CoreGraphics REQUIRED)
    find_library(corevideo_lib CoreVideo REQUIRED)
   
    set(${PROJECT_NAME}_PLATFORM_LIBS
        ${CMAKE_THREAD_LIBS_INIT}
        ${corefoundation_lib}
        ${cocoa_lib}
        ${coremedia_lib}
        ${avfoundation_lib}
        ${coregraphics_lib}  
        ${corevideo_lib}
    ) 
else()
    find_package(X11 REQUIRED)
    if(!X11_XTest_FOUND)
        message(FATAL_ERROR "X11 extensions are required, but not found!")
    endif()
    if(!X11_Xfixes_LIB)
        message(FATAL_ERROR "X11 fixes extension is required, but not found!")
    endif()
    find_package(Threads REQUIRED)
    set(${PROJECT_NAME}_PLATFORM_LIBS
        ${X11_LIBRARIES}
        ${X11_Xfixes_LIB}
        ${X11_XTest_LIB}
        ${X11_Xinerama_LIB}
        ${CMAKE_THREAD_LIBS_INIT}
    )
endif()

add_executable(${PROJECT_NAME}_static
    src/lodepng.cpp
    src/osx_screengrabber.cpp
)
target_link_libraries(${PROJECT_NAME}_static CONAN_PKG::screen_capture_lite ${${PROJECT_NAME}_PLATFORM_LIBS} )

这修复了所有问题，我将相同 git 标签 v17.1.439 的原始作者示例项目复制到它自己的 repo 中。启动了 conan 和 cmake .. 现在一切正常了

谢谢柯南！和 screen_capture_lite!

macosx + conan + cmake 构建导致未定义的体系结构符号 x86_64？

macosx + conan + cmake build resulting in undefined symbols for architecture x86_64?

c++

cmake

conan