我正在关注这些指示属于 openCV 文档，但它们确实已经过时了：提到了 iOS4 或 iOS5，XCode 4.2 安装在 /Developer 中，等等。
它没有构建，并且我有各种错误：
所有初始测试均失败：--Performing Test HAVE_CXX_W - Failed
Also:
-- Looking for fseeko
-- Looking for fseeko - not found
-- Looking for unistd.h
-- Looking for unistd.h - not found
-- Looking for sys/types.h
-- Looking for sys/types.h - not found
-- Looking for stdint.h
-- Looking for stdint.h - not found
-- Looking for stddef.h
-- Looking for stddef.h - not found
配置看起来正确：
-- General configuration for OpenCV 2.4.9 =====================================
-- Version control: 2.4.5-1168-g0a42a3e
--
-- Platform:
-- Host: Darwin 12.3.0 i386
-- Target: iOS
-- CMake: 2.8.10
-- CMake generator: Xcode
-- CMake build tool: /opt/local/bin/cmakexbuild
-- Xcode: 4.6.2
[...]
-- Media I/O:
-- ZLib: build (ver 1.2.7)
-- JPEG: build (ver 90)
-- WEBP: NO
-- PNG: build (ver 1.5.12)
-- TIFF: NO
-- JPEG 2000: NO
-- OpenEXR: NO
--
-- Video I/O:
-- AVFoundation: YES
-- QuickTime: NO
-- QTKit: YES
-- V4L/V4L2: NO/NO
但后来，我遇到了第一个链接错误：/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/libtool: can't open file: /Users/ant/xcode/opencv/ios/build/iPhoneOS-armv7/3rdparty/libjpeg/OpenCV.build/Release-iphoneos/libjpeg.build/Objects-normal/armv7/jmemansi.o
我的系统缺少什么来编译 iOS 版 OpenCV？
根据 3rdParty/libjpeg/CMakeLists.txt:12，jmemansi.c 被排除在 build 之外：
if(ANDROID OR IOS)
ocv_list_filterout(lib_srcs jmemansi.c)
else()
ocv_list_filterout(lib_srcs jmemnobs.c)
endif()
但是，在世界模块构建中，相应的目标文件不会从链接器输入中排除。这可以通过从链接器输入中过滤掉 jmemansi.o 来解决：
模块/world/CMakeLists.txt:84
macro(ios_include_3party_libs)
foreach(l ${ARGN})
add_dependencies(${the_module} ${l})
string(REGEX REPLACE "<MODULE_NAME>" "${l}" objpath1 "${CMAKE_BINARY_DIR}/3rdparty/${l}/${objpath0}")
file(GLOB sources ${CMAKE_SOURCE_DIR}/3rdparty/${l}/*.c)
foreach(srcname ${sources})
if(IS_ABSOLUTE "${srcname}")
file(RELATIVE_PATH srcname "${CMAKE_SOURCE_DIR}/3rdparty/${l}" "${srcname}")
endif()
string(REPLACE ".." "__" srcname "${srcname}")
get_filename_component(srcname_we ${srcname} NAME_WE)
string(REGEX REPLACE <SRC_NAME_WE> "${srcname_we}" objpath2 "${objpath1}")
string(REGEX REPLACE <RELATIVE_SRC_NAME> "${srcname}" objpath3 "${objpath2}")
list(APPEND objlist "\"${objpath3}\"")
endforeach() # (srcname ${sources})
endforeach()
ocv_list_filterout(objlist jmemansi) # <<= dirty fix
endmacro()
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