我正在使用OSX 10.9上的XCode 5.0.1,并且链接了libc++(LLVM C ++标准库)和Valid architectures armv7; armv7s。
第一步,我创建了一个使用Cmake的OpenCV2.framework + foo的项目,并创建了一个使用foo.a的XCode项目。我的可执行文件链接了OpenCV2.framework + foo.a,并且可以完美工作,编译和链接正常。
第二步,我使用Ogre的模板创建了另一个项目,并且这个项目也可以完美工作。
第三步,我尝试将foo.a添加到新项目中,以执行与第一步相同的操作。
- 将包含路径添加到Header Search Paths中。
- 将库路径添加到Library Search Paths中。
- 将-ObjC -all_load -lfoo添加到其他链接器路径中,如此处和此处所述
- 在项目中添加所需的代码源。
- 当我使用foo函数调用时 —> 链接问题:architecture armv7的foo :: functionname()未定义符号。
- INFO:
- 该调用与第一个工作的项目完全相同。
- 使用otool -hv foo.a —> 我看到所有lib.o的cputype为ARV V7
- 使用lipo -info foo.a --> 当我使用该架构时,我可以看到foo.a是armv7或armv7s。
- 使用nm foo.a | grep functionname —> 我看到函数在库中,在编译两个arch时都是armv7和armv7s。
因此,如果库在另一个项目中工作,并且函数在其中,为什么会出现链接问题?
- INFO 2:
- 将foo目标添加到Ogre的项目中,同样存在问题。按照此方法进行操作。
- 添加目标依赖项也无法解决问题。
我的CmakeList以编译此示例为:
# /////////////////////////////////////////////////////////
# //SAMPLE
# /////////////////////////////////////////////////////////
# 3rdParty (OGRE LOCATION)
set(OGRE_SDK_ROOT /Users/vgoni/Librerias/ogre1.9-pre/OgreSDK/ CACHE PATH "Ogre SDK ROOT")
set(OGRE_DEPENDENCIES_DIR ${OGRE_SDK_ROOT}/iOSDependencies CACHE PATH "Ogre SDK DEP")
# Set up project
SET(PROJ_NAME ogreIOS)
PROJECT( ${PROJ_NAME} )
SET(PRODUCT_NAME ${PROJ_NAME})
SET(EXECUTABLE_NAME ${PROJ_NAME}Executable)
# Add variable to generate iphone project in ADD_EXECUTABLE
SET(APP_TYPE MACOSX_BUNDLE)
# Headers
SET(${PROJ_NAME}_HEADERS
include/OgreStaticPluginLoader.h
include/OgreDemoApp.h
include/OgreFramework.h
include/AppDelegate.h
)
# Source
SET(${PROJ_NAME}_SRC
src/OgreFramework.cpp
src/OgreDemoApp.cpp
src/main.mm
)
# Add there files to Resources package into XCODE
SET_SOURCE_FILES_PROPERTIES(
resources/ogre.cfg
resources/plugins.cfg
resources/resources.cfg
resources/ogreiosSample-Info.plist
resources/ogreiosSample-Prefix.pch
resources/en.lproj/InfoPlist.strings
PROPERTIES
MACOSX_PACKAGE_LOCATION Resources
)
# Include self directories
INCLUDE_DIRECTORIES( include )
# Include OGRE headers needed
INCLUDE_DIRECTORIES( ${OGRE_SDK_ROOT}/include )
INCLUDE_DIRECTORIES( ${OGRE_SDK_ROOT}/include/OIS )
INCLUDE_DIRECTORIES( ${OGRE_SDK_ROOT}/include/OGRE )
INCLUDE_DIRECTORIES( ${OGRE_SDK_ROOT}/include/OGRE/Overlay )
INCLUDE_DIRECTORIES( ${OGRE_SDK_ROOT}/include/OGRE/iOS )
INCLUDE_DIRECTORIES( ${OGRE_SDK_ROOT}/include/OGRE/RTShaderSystem )
INCLUDE_DIRECTORIES( ${OGRE_SDK_ROOT}/include/OGRE/RenderSystems/GLES2 )
INCLUDE_DIRECTORIES( ${OGRE_SDK_ROOT}/iOSDependencies/include )
# Link Directories where libraries needed are
LINK_DIRECTORIES( ${OGRE_SDK_ROOT}/lib/Release )
LINK_DIRECTORIES( ${OGRE_SDK_ROOT}/iOSDependencies/lib )
LINK_DIRECTORIES( ${OGRE_SDK_ROOT}/iOSDependencies/lib/Release )
# Add ogre & boots libraries flags
SET (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -lmesaglsl2 -lboost_system -lboost_chrono -lboost_date_time -lboost_thread -lFreeType -lFreeImage -lzzip -lz -lc++ -lforce_load -lfoo")
# foo is my library, force to load all to avoid fail in linking
# 3rdParty ogre libraries
SET(OGRE_LIBS OIS OgreMainStatic RenderSystem_GLES2Static OgreRTShaderSystemStatic )
# Link the libraries needed
#TARGET_LINK_LIBRARIES (${PROJ_NAME} ${OGRE_LIBS})
# Create executable for iOS
ADD_EXECUTABLE(
${EXECUTABLE_NAME}
${APP_TYPE}
${${PROJ_NAME}_HEADERS}
${${PROJ_NAME}_SRC}
)
# Adding info to XCode project
#set_target_properties(${EXECUTABLE_NAME} PROPERTIES
#MACOSX_BUNDLE_INFO_PLIST ${CMAKE_CURRENT_SOURCE_DIR}/resources/Info.plist)
# Change name to make work Macros
SET(PROJ_NAME ogreIOSExecutable)
# Macro to add frameworks to Sample Executable
link_ios_framework(AssetsLibrary ${EXECUTABLE_NAME})
link_ios_framework(AVFoundation ${EXECUTABLE_NAME})
link_ios_framework(CoreMedia ${EXECUTABLE_NAME})
link_ios_framework(CoreGraphics ${EXECUTABLE_NAME})
link_ios_framework(CoreVideo ${EXECUTABLE_NAME})
link_ios_framework(ImageIO ${EXECUTABLE_NAME})
link_ios_framework(Foundation ${EXECUTABLE_NAME})
link_ios_framework(OpenGLES ${EXECUTABLE_NAME})
link_ios_framework(QuartzCore ${EXECUTABLE_NAME})
link_ios_framework(UIKit ${EXECUTABLE_NAME})
# Needed dependencies
link_ios_sdk(libc++.1.dylib ${EXECUTABLE_NAME})
link_ios_sdk(libz.dylib ${EXECUTABLE_NAME})
#Add OpenCV Libraries to link
TARGET_LINK_LIBRARIES (${PROJ_NAME} ${OpenCV_LIBS})
LINK_DIRECTORIES(
${LIBRARY_OUTPUT_PATH}
)