ios - 无法将 MacOS 框架与 CMake 链接

Question

我正在尝试用 cmake 构建一个子项目(它不是一个 xcode 项目，甚至不是一个 iPhone 应用程序，结果是跨平台控制台可执行文件，#includes 一些继承自 C++ 抽象类，用 objective-c++ 编写)

我正在使用本指南链接 mac 操作系统框架:http://www.vtk.org/Wiki/CMake:HowToUseExistingOSXFrameworks

和这个宏:

macro(ADD_FRAMEWORK fwname appname)
find_library(FRAMEWORK_${fwname}
    NAMES ${fwname}
    PATHS ${CMAKE_OSX_SYSROOT}/System/Library
    PATH_SUFFIXES Frameworks
    NO_DEFAULT_PATH)
if( ${FRAMEWORK_${fwname}} STREQUAL FRAMEWORK_${fwname}-NOTFOUND)
    MESSAGE(ERROR ": Framework ${fwname} not found")
else()
    TARGET_LINK_LIBRARIES(${appname} ${FRAMEWORK_${fwname}})
    MESSAGE(STATUS "Framework ${fwname} found at ${FRAMEWORK_${fwname}}")
endif()
endmacro(ADD_FRAMEWORK)

这是CMakeLists.txt中的重要部分

project(myprojectname)
........
add_executable(mytarget src/mytarget.cpp)

add_framework(CoreMedia mytarget)
add_framework(CoreVideo mytarget)
add_framework(AVFoundation mytarget)
add_framework(Foundation mytarget)
........

这就是我在尝试构建时所拥有的:

WARNING: Target "mytarget" requests linking to directory "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/Frameworks/CoreMedia.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "mytarget" requests linking to directory "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/Frameworks/CoreVideo.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "mytarget" requests linking to directory "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/Frameworks/AVFoundation.framework".  Targets may link only to libraries.  CMake is dropping the item.
WARNING: Target "mytarget" requests linking to directory "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/System/Library/Frameworks/Foundation.framework".  Targets may link only to libraries.  CMake is dropping the item.

它实际上找到了所有这些框架，但无法链接，这会产生很多链接器错误。我很确定这就是原因，因为我使用 XCode 制作了一个 testproj，并且它有相同的错误，直到我链接了所有需要的框架。

刚用的时候

FIND_LIBRARY(COREMEDIA_LIB CoreMedia)
...

然后 COREMEDIA_LIB 设置为 NOTFOUND - 这是怎么回事？ :/

我在谷歌上搜索了很多但一无所获 :( 感觉很迷茫。

Answer 1

明白了:您必须不是TARGET_LINK_LIBRARIES 中的frameworkname.framework 文件夹，但是fwname.framework/fwname 文件!现在它以这种方式工作。

修改后的宏是这样的:

macro(ADD_FRAMEWORK fwname appname)
    find_library(FRAMEWORK_${fwname}
    NAMES ${fwname}
    PATHS ${CMAKE_OSX_SYSROOT}/System/Library
    PATH_SUFFIXES Frameworks
    NO_DEFAULT_PATH)
    if( ${FRAMEWORK_${fwname}} STREQUAL FRAMEWORK_${fwname}-NOTFOUND)
        MESSAGE(ERROR ": Framework ${fwname} not found")
    else()
        TARGET_LINK_LIBRARIES(${appname} "${FRAMEWORK_${fwname}}/${fwname}")
        MESSAGE(STATUS "Framework ${fwname} found at ${FRAMEWORK_${fwname}}")
    endif()
endmacro(ADD_FRAMEWORK)

希望对某人有用...