小贝子编程

macosx + conan + cmake构建导致架构x86_64的未定义符号?



我一直在包装一些柯南食谱，取得了不同程度的成功。但是现在被困在一个特殊的包上

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"]

这个上传到我的注册表很好我可以看到确实有一个libscreen_cab.a保存了

但是当我尝试使用这个库在一个新的项目中创建库的例子。它错误

CMakeLists.txt(消费项目的)

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)

以下是Iconan install之后发生的情况

[requires]
ScreenCaptureLite/11.0.0@namespace/prod
[generators]
cmake

发出错误的命令

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:

似乎作者回复了我，告诉我我需要添加一些东西…我不确定如何将其添加到基于conan的CMakeLists.txt中，但它是所有apple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
)

我只是把这些行添加到我的CMakeLists.txt相同吗?

原来我从github上拉的版本是超级古老的…有一次我更新了食谱，从最新的…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文…加入了柯南的逻辑…最重要的是，学会了如何添加逻辑，这样如果你想要静态或动态库，conan可以有意义

我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"]

注意最后几行，我必须为不同的库添加逻辑

那么我的消费项目只需要下面的

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} )

这修复了一切，我复制了相同git标签v17.1.439的原作者示例项目到它自己的repo..点燃了柯南和柯西…现在一切正常

谢谢柯南!和screen_capture_lite !

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