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POiOS SDK 5.1 linker error for non_lazy_ptr in Xcode 4.4.1
 

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    <p>(I posted this question to the VideoLAN forum, but have had no takers yet. I know the SO community won't let me down.)</p> <p>I am trying to build the MobileVLC project for iOS. I have gone through the command line process to build the project, and after a couple of tweaks as described in <a href="http://forum.videolan.org/viewtopic.php?f=12&amp;t=103331" rel="nofollow noreferrer">http://forum.videolan.org/viewtopic.php?f=12&amp;t=103331</a> and <a href="http://forum.videolan.org/viewtopic.php?f=12&amp;t=103271" rel="nofollow noreferrer">http://forum.videolan.org/viewtopic.php?f=12&amp;t=103271</a>, the build script runs almost to completion. It errors out when it tries to get Xcode to build the final project. So I load it into Xcode and try to build, and I can see the error, here is what I get when I use the -v linker flag:</p> <pre><code>Ld /Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos/VLC.app/VLC normal armv7 cd /Users/bp/Desktop/vlc/MobileVLC setenv IPHONEOS_DEPLOYMENT_TARGET 5.1 setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk -L/Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos -L/Users/bp/Desktop/vlc/MobileVLC/External/MobileVLCKit -L/Users/bp/Desktop/vlc/MobileVLC/External/MediaLibraryKit -F/Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos -filelist /Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Intermediates/MobileVLC.build/Debug-iphoneos/MobileVLC.build/Objects-normal/armv7/VLC.LinkFileList -dead_strip -Wl,-no_pie,-v -fobjc-link-runtime -miphoneos-version-min=5.1 -framework Foundation -framework UIKit -framework CoreGraphics -framework OpenGLES -framework AudioToolbox -framework QuartzCore -liconv -lz /Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos/libMobileMediaLibraryKit.a -lsqlite3 -lstdc++.6 -lbz2 -lxml2 -framework CoreData -framework CoreText -framework MediaPlayer /Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos/libMobileVLCKit.a -o /Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos/VLC.app/VLC @(#)PROGRAM:ld PROJECT:ld64-133.3 configured to support archs: armv6 armv7 i386 x86_64 Library search paths: /Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos /Users/bp/Desktop/vlc/MobileVLC/External/MobileVLCKit /Users/bp/Desktop/vlc/MobileVLC/External/MediaLibraryKit /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk/usr/lib Framework search paths: /Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk/System/Library/Frameworks/ LLVM version 3.1svn, from Apple Clang 4.0 (build 421.0.60) ld: 'non_lazy_ptr' in /Users/bp/Library/Developer/Xcode/DerivedData/MobileVLC-ctcjnpeqzuhulxcmjlhrjnyzpzil/Build/Products/Debug-iphoneos/libMobileVLCKit.a(libdeinterlace_plugin_la-deinterlace.o) contains undefined reference for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation) </code></pre> <p>As far as I can tell, the libMobileVLCKit.a file is linked into the MobileVLC project, so I am unsure what to look for next, as I cannot find any references to non_lazy_ptr anywhere in any code, and the framework references all look good. Even if you do not know the solution, any ideas as to where to look for the problem would be appreciated. Thanks.</p> <p>EDIT: Here is a screen capture showing everything in the Build Phases tab of the MobileVLC project.</p> <p><img src="https://i.stack.imgur.com/rPM3o.png" alt="MobileVLC Build Phases"></p> <p>EDIT 2: My posting on the VideoLAN forums has gotten some "me too" replies, along with an error that is very similar looking to my error from another user. Here is the final line with the error message:</p> <pre><code>ld: '_AmplifyFloat' in /Users/**/MobileVLC/ImportedSources/VLCKit/build/Release-iphoneos/libMobileVLCKit.a(libvolume_neon_plugin_la-volume.o) contains undefined reference for architecture armv7 </code></pre> <p>Here is the posting on the VideoLAN forum: <a href="http://forum.videolan.org/viewtopic.php?f=12&amp;t=103433" rel="nofollow noreferrer">http://forum.videolan.org/viewtopic.php?f=12&amp;t=103433</a></p> <p>EDIT 3: I grabbed a fresh copy of the source from VideoLAN's git repository and went through the answer provided below by user1071136, and ended up with the same exact error that they got as well.</p> <p>I found a similar looking error on Stack Overflow that indicated the solution was to check to make sure that the <code>Generate Position-Dependent Code</code> option in the <code>Apple LLVC compiler 4.0 - Code Generation</code> build setting was set to No. But as usual in trying to get VLC running on iOS, that was a dead end also as the build setting is already set to No for that.</p> <p>Here is a link to that question and answer: <a href="https://stackoverflow.com/questions/11846078/null-in-section-text-text-reloc-3-section-for-address0x7c6c-address-no">(null): In section __TEXT,__text reloc 3: section For Address(0x7C6C) address not in any section for architecture armv7</a></p>
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    1. COranlib -c on the library file may fix the issue. You can also check target's framework search paths. I'm no pro but I think these can help you.
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    2. COI did the ranlib command on the libMobileVLCKit.a file in the derived files location, and it just came back with a bunch of lines about how there were no symbols. Also, I checked the target framework search path in both the MobileVLC project and in the MobileVLCKit project, and they were blank.
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    3. COA colleague of mine found this recent link of the same issue, but I am still not sure what I should be looking for: http://comments.gmane.org/gmane.comp.video.videolan.vlc.devel/87906
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