我一直在努力让OpenCV用arm64在Xamarin.iOS上运行。我在opencv.org上找到的最新版本似乎不是为arm64构建的。我自己构建最新的库时遇到了麻烦，但是为OpenCV 2.4.12（https://github.com/Itseez/opencv/tree/2.4.12）进行了构建。但是，当我将库添加到我的解决方案（通过绑定库）时，我收到以下错误：
MTOUCH: error MT5210: Native linking failed, undefined symbol: _jpeg_free_large. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH: error MT5210: Native linking failed, undefined symbol: _jpeg_free_small. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH: error MT5210: Native linking failed, undefined symbol: _jpeg_get_large. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH: error MT5210: Native linking failed, undefined symbol: _jpeg_get_small. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH: error MT5210: Native linking failed, undefined symbol: _jpeg_mem_available. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH: error MT5210: Native linking failed, undefined symbol: _jpeg_mem_init. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH: error MT5210: Native linking failed, undefined symbol: _jpeg_mem_term. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH: error MT5210: Native linking failed, undefined symbol: _jpeg_open_backing_store. Please verify that all the necessary frameworks have been referenced and native libraries are properly linked in.
MTOUCH: error MT5202: Native linking failed. Please review the build log.
我已阅读https://github.com/twelve17/openalpr-ios/issues/5我需要链接到libjpeg。我通过使用以下mtouch命令执行此操作：
-gcc_flags "-L${ProjectDir} -ljpeg -force_load ${ProjectDir}/libjpeg.a"
但是，现在我得到了重复项可用的错误：
MTOUCH: duplicate symbol _jpeg_std_error in:
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_CreateCompress'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_destroy_compress'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_abort_compress'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_suppress_tables'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_finish_compress'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_write_marker'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_write_m_header'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_write_m_byte'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_write_tables'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapimin.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_start_compress'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapistd.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapistd.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_write_scanlines'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapistd.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapistd.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_write_raw_data'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcapistd.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcapistd.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jinit_c_coef_controller'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jccoefct.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jccoefct.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jinit_color_converter'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jccolor.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jccolor.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jinit_forward_dct'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcdctmgr.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcdctmgr.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_make_c_derived_tbl'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jchuff.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jchuff.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_gen_optimal_table'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jchuff.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jchuff.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jinit_huff_encoder'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jchuff.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jchuff.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jinit_compress_master'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcinit.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcinit.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jinit_c_main_controller'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcmainct.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcmainct.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jinit_marker_writer'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcmarker.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcmarker.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jinit_c_master_control'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcmaster.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcmaster.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_abort'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcomapi.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcomapi.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_destroy'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcomapi.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcomapi.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_alloc_quant_table'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcomapi.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcomapi.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_alloc_huff_table'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcomapi.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcomapi.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_add_quant_table'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_set_linear_quality'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_quality_scaling'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_set_quality'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_set_defaults'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_default_colorspace'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_set_colorspace'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5212: Native linking failed, duplicate symbol: '_jpeg_simple_progression'.
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/obj/iPhone/Debug/mtouch-cache/opencv2.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5213: Duplicate symbol in: /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a(jcparam.o) (Location related to previous error)
MTOUCH: error MT5201: Native linking failed. Please review the build log and the user flags provided to gcc: -L/Users/Alexander/Projects/VRMouse/iOS -ljpeg -force_load /Users/Alexander/Projects/VRMouse/iOS/libjpeg.a
MTOUCH: error MT5202: Native linking failed. Please review the build log.
3 Warning(s)
105 Error(s)
我不知道如何解决这个问题以及我哪里出错了。任何人都可以帮助我吗？
答案 0 :(得分：2)
根据我从Chris Britt收到的评论，我觉得OpenCV的构建出了问题。我设法找到了iOS的预构建版本的框架。 SDK 7.1，armv7，armv7s，arm64，i386，x86_64（https://github.com/AlexeyIS/OpenCV-iOS）。即使它没有解释我做错了什么，这是一个很好的解决方法，允许我在arm64上运行OpenCV。