OpenCV Linker Error - ios

I've done a lot of searching around so far on this problem, but no proposed solution has worked for me. When running my program, I need to be able to load in a video file to an opencv VideoCapture object so that I can then display it frame by frame. The line
vidCap = cv::VideoCapture::VideoCapture(FILENAME);
causes 4 linker errors:
Undefined symbols for architecture i386:
"cv::VideoCapture::VideoCapture(cv::String const&)", referenced from:
-[ViewController viewDidLoad] in ViewController.o
"cv::String::deallocate()", referenced from:
cv::String::~String() in ViewController.o
"cv::String::allocate(unsigned long)", referenced from:
cv::String::String(char const*) in ViewController.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
and nothing has worked for me so far to fix this. When I change the C++ compiler from libc++ to libstdc++ then I get a "lexical or preprocessor issue: 'cstdint' file not found"
Can anyone offer me assistance on this?
Edit:
Ld /Users/max/Library/Developer/Xcode/DerivedData/ChickenTracker-frcayvqpvtapigflaqrveexxtkud/Build/Products/Debug-iphonesimulator/ChickenTracker.app/ChickenTracker normal i386
cd /Users/max/Documents/ChickenTracker
setenv IPHONEOS_DEPLOYMENT_TARGET 7.0
setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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 i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk -L/Users/max/Library/Developer/Xcode/DerivedData/ChickenTracker-frcayvqpvtapigflaqrveexxtkud/Build/Products/Debug-iphonesimulator -L/Users/max/Documents/ChickenTracker -L/Users/max/Downloads/ios/build/iPhoneSimulator-x86_64/modules/highgui/UninstalledProducts -L/Users/max/Documents/opencv-2.4.7/build/lib -F/Users/max/Library/Developer/Xcode/DerivedData/ChickenTracker-frcayvqpvtapigflaqrveexxtkud/Build/Products/Debug-iphonesimulator -F/Users/max/Downloads/ios -F/Users/max/Documents/ChickenTracker -filelist /Users/max/Library/Developer/Xcode/DerivedData/ChickenTracker-frcayvqpvtapigflaqrveexxtkud/Build/Intermediates/ChickenTracker.build/Debug-iphonesimulator/ChickenTracker.build/Objects-normal/i386/ChickenTracker.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -stdlib=libc++ -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=7.0 -lc++ -framework opencv2 -framework Accelerate -framework CoreImage -framework QuartzCore -framework AssetsLibrary -framework ImageIO -framework CoreMedia -framework CoreVideo -framework AVFoundation -framework CoreGraphics -framework UIKit -framework Foundation -Xlinker -dependency_info -Xlinker /Users/max/Library/Developer/Xcode/DerivedData/ChickenTracker-frcayvqpvtapigflaqrveexxtkud/Build/Intermediates/ChickenTracker.build/Debug-iphonesimulator/ChickenTracker.build/Objects-normal/i386/ChickenTracker_dependency_info.dat -o /Users/max/Library/Developer/Xcode/DerivedData/ChickenTracker-frcayvqpvtapigflaqrveexxtkud/Build/Products/Debug-iphonesimulator/ChickenTracker.app/ChickenTracker

Related

Apple Mach-O Linker Error in architecture x86_64

I'm getting the following linker error:
Ld /Users/premedios/Library/Developer/Xcode/DerivedData/Tweepr-chpytouktuxjlfehpsynwphlgwzo/Build/Products/Debug-iphonesimulator/Tweepr.app/Tweepr normal x86_64
cd /Users/premedios/Developer/Objective-C/tweepr-3
export IPHONEOS_DEPLOYMENT_TARGET=6.0
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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 x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator8.1.sdk -L/Users/premedios/Library/Developer/Xcode/DerivedData/Tweepr-chpytouktuxjlfehpsynwphlgwzo/Build/Products/Debug-iphonesimulator -F/Users/premedios/Library/Developer/Xcode/DerivedData/Tweepr-chpytouktuxjlfehpsynwphlgwzo/Build/Products/Debug-iphonesimulator -F/Users/premedios/Developer/Objective-C/tweepr-3/iUnfollow/Classes/Library -filelist /Users/premedios/Library/Developer/Xcode/DerivedData/Tweepr-chpytouktuxjlfehpsynwphlgwzo/Build/Intermediates/Tweepr.build/Debug-iphonesimulator/Tweepr.build/Objects-normal/x86_64/Tweepr.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -ObjC -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=6.0 -framework Accelerate -framework Social -framework Security -framework StoreKit -framework ImageIO -framework MapKit -framework CoreText -framework CoreTelephony -lz -framework MobileCoreServices -framework Accounts -framework Twitter -framework CoreData -framework SystemConfiguration -framework CoreFoundation -framework CFNetwork -framework UIKit -framework Foundation -framework CoreGraphics -framework QuartzCore -lPods -Xlinker -dependency_info -Xlinker /Users/premedios/Library/Developer/Xcode/DerivedData/Tweepr-chpytouktuxjlfehpsynwphlgwzo/Build/Intermediates/Tweepr.build/Debug-iphonesimulator/Tweepr.build/Objects-normal/x86_64/Tweepr_dependency_info.dat -o /Users/premedios/Library/Developer/Xcode/DerivedData/Tweepr-chpytouktuxjlfehpsynwphlgwzo/Build/Products/Debug-iphonesimulator/Tweepr.app/Tweepr
Undefined symbols for architecture x86_64:
"_OBJC_CLASS_$_STTwitterAPI", referenced from:
objc-class-ref in NetworkManager.o
"_OBJC_CLASS_$_SVProgressHUD", referenced from:
objc-class-ref in Utils.o
objc-class-ref in NetworkManager.o
objc-class-ref in TPRIAPManager.o
"_OBJC_CLASS_$_SimpleAuth", referenced from:
objc-class-ref in TPRAppDelegate.o
objc-class-ref in UserLoadingRoutine.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I tried "Clean Build Folder", but the error persists. Anyone have any other ideas on the cause of this?

Nuance Vocalizer demo application fails to build for 64-bit simulator devices

Trying to build the demo app contained in the DragonMobileSDK_1.4.9 download, I get 62 undefined symbols referenced from libSpeechKit.a-x86_64-master.o, all prefixed with _nmsp_vector_. Using Xcode 5.1.
The app compiles okay for the non-64-bit simulator devices. When I searched for answers I saw similar posts but they were problems in user apps, resolved by linking against the same libraries as the demo app. In this case it's the demo app itself that fails.
The build output looks like this:
Ld /Users/user13/Library/Developer/Xcode/DerivedData/DMVocalizer-gighyiitifpefcfcyeoylguzztkm/Build/ Products/Debug-iphonesimulator/Vocalizer.app/Vocalizer normal x86_64
cd /Users/user13/Developer/DragonMobileSDK_1.4.9/DragonMobileVocalizer
export IPHONEOS_DEPLOYMENT_TARGET=7.1
export PATH="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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 x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.1.sdk -L/Users/user13/Library/Developer/Xcode/DerivedData/DMVocalizer-gighyiitifpefcfcyeoylguzztkm/Build/Products/Debug-iphonesimulator -F/Users/user13/Library/Developer/Xcode/DerivedData/DMVocalizer-gighyiitifpefcfcyeoylguzztkm/Build/Products/Debug-iphonesimulator -F/Users/user13/Developer/DragonMobileSDK_1.4.9/DragonMobileVocalizer -filelist /Users/user13/Library/Developer/Xcode/DerivedData/DMVocalizer-gighyiitifpefcfcyeoylguzztkm/Build/Intermediates/DMVocalizer.build/Debug-iphonesimulator/DMVocalizer.build/Objects-normal/x86_64/Vocalizer.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=7.1 -framework SpeechKit -framework Foundation -framework UIKit -framework CoreGraphics -framework AudioToolbox -framework SystemConfiguration -framework AVFoundation -framework CFNetwork -framework Security -Xlinker -dependency_info -Xlinker /Users/user13/Library/Developer/Xcode/DerivedData/DMVocalizer-gighyiitifpefcfcyeoylguzztkm/Build/Intermediates/DMVocalizer.build/Debug-iphonesimulator/DMVocalizer.build/Objects-normal/x86_64/Vocalizer_dependency_info.dat -o /Users/user13/Library/Developer/Xcode/DerivedData/DMVocalizer-gighyiitifpefcfcyeoylguzztkm/Build/Products/Debug-iphonesimulator/Vocalizer.app/Vocalizer
Undefined symbols for architecture x86_64:
"_nmsp_audio_player_create", referenced from:
l093 in SpeechKit(libSpeechKit.a-x86_64-master.o)
"_nmsp_audio_player_delete", referenced from:
l017 in SpeechKit(libSpeechKit.a-x86_64-master.o)
"_nmsp_audio_player_getAudioSink", referenced from:
l027 in SpeechKit(libSpeechKit.a-x86_64-master.o
…
l069 in SpeechKit(libSpeechKit.a-x86_64-master.o)
l112 in SpeechKit(libSpeechKit.a-x86_64-master.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
You have to left only: armv7 armv7s i386 architectures for your project/demo in Architectures and Valid Architectures manually.

Xcode embedding second project, linking error

I have a project that uses (or would like to) the route-me (alpstein fork). I have followed the installations interaction with some limited success.
I have dragged "MapView.xcodeproj" in to my project, I have added mapview.lib, to "target dependancies" and "link binaries with libraries".
if I go to my MapViewController, i can write all my code and I get no errors when importing RMmapView.h. So the compiler is seeing the imported library, however when i build the application I get this error
d /Users/macuser/Library/Developer/Xcode/DerivedData/G4EMA-djubtvaxtspjxbbolnkeaoatnyqd/Build/Products/Debug-iphonesimulator/G4EMA.app/G4EMA normal i386
cd /Users/macuser/Dropbox/G4EMA
setenv IPHONEOS_DEPLOYMENT_TARGET 5.1
setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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 i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk -L/Users/macuser/Library/Developer/Xcode/DerivedData/G4EMA-djubtvaxtspjxbbolnkeaoatnyqd/Build/Products/Debug-iphonesimulator -LRM -LRM/Alpstein-route-me-f06f2d0 -LRM/MapView -LRM/Proj4 -LRM/samples -LRM/Alpstein-route-me-f06f2d0/MapView -LRM/Alpstein-route-me-f06f2d0/Proj4 -LRM/Alpstein-route-me-f06f2d0/samples -LRM/MapView/Map -LRM/MapView/UnitTesting -LRM/samples/LayeredMap -LRM/samples/MapMemoryLeaksCheck -LRM/samples/MapTestbed -LRM/samples/MapTestbedFlipMaps -LRM/samples/MapTestbedTwoMaps -LRM/samples/MarkerMurder -LRM/samples/ProgrammaticMap -LRM/Alpstein-route-me-f06f2d0/MapView/Map -LRM/Alpstein-route-me-f06f2d0/MapView/UnitTesting -LRM/Alpstein-route-me-f06f2d0/samples/LayeredMap -LRM/Alpstein-route-me-f06f2d0/samples/MapMemoryLeaksCheck -LRM/Alpstein-route-me-f06f2d0/samples/MapTestbed -LRM/Alpstein-route-me-f06f2d0/samples/MapTestbedFlipMaps -LRM/Alpstein-route-me-f06f2d0/samples/MapTestbedTwoMaps -LRM/Alpstein-route-me-f06f2d0/samples/MarkerMurder -LRM/Alpstein-route-me-f06f2d0/samples/ProgrammaticMap -LRM/MapView/Map/FMDB -LRM/MapView/Map/Resources -LRM/MapView/Map/SMCalloutView -LRM/samples/LayeredMap/Classes -LRM/samples/MapMemoryLeaksCheck/Classes -LRM/samples/MapTestbed/Classes -LRM/samples/MapTestbedFlipMaps/Classes -LRM/samples/MapTestbedTwoMaps/Classes -LRM/samples/MarkerMurder/Classes -LRM/samples/ProgrammaticMap/Classes -LRM/Alpstein-route-me-f06f2d0/MapView/Map/FMDB -LRM/Alpstein-route-me-f06f2d0/MapView/Map/Resources -LRM/Alpstein-route-me-f06f2d0/MapView/Map/SMCalloutView -LRM/Alpstein-route-me-f06f2d0/samples/LayeredMap/Classes -LRM/Alpstein-route-me-f06f2d0/samples/MapMemoryLeaksCheck/Classes -LRM/Alpstein-route-me-f06f2d0/samples/MapTestbed/Classes -LRM/Alpstein-route-me-f06f2d0/samples/MapTestbedFlipMaps/Classes -LRM/Alpstein-route-me-f06f2d0/samples/MapTestbedTwoMaps/Classes -LRM/Alpstein-route-me-f06f2d0/samples/MarkerMurder/Classes -LRM/Alpstein-route-me-f06f2d0/samples/ProgrammaticMap/Classes -F/Users/macuser/Library/Developer/Xcode/DerivedData/G4EMA-djubtvaxtspjxbbolnkeaoatnyqd/Build/Products/Debug-iphonesimulator -filelist /Users/macuser/Library/Developer/Xcode/DerivedData/G4EMA-djubtvaxtspjxbbolnkeaoatnyqd/Build/Intermediates/G4EMA.build/Debug-iphonesimulator/G4EMA.build/Objects-normal/i386/G4EMA.LinkFileList -Xlinker -objc_abi_version -Xlinker 2 -objc,-all_load -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=5.1 /Users/macuser/Library/Developer/Xcode/DerivedData/G4EMA-djubtvaxtspjxbbolnkeaoatnyqd/Build/Products/Debug-iphonesimulator/libMapView.a -lz -framework SystemConfiguration -lsqlite3 -framework QuartzCore -framework CoreLocation -framework UIKit -framework Foundation -framework CoreGraphics -Xlinker -dependency_info -Xlinker /Users/macuser/Library/Developer/Xcode/DerivedData/G4EMA-djubtvaxtspjxbbolnkeaoatnyqd/Build/Intermediates/G4EMA.build/Debug-iphonesimulator/G4EMA.build/Objects-normal/i386/G4EMA_dependency_info.dat -o /Users/macuser/Library/Developer/Xcode/DerivedData/G4EMA-djubtvaxtspjxbbolnkeaoatnyqd/Build/Products/Debug-iphonesimulator/G4EMA.app/G4EMA
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_RMTileImage", referenced from:
objc-class-ref in libMapView.a(RMMapTiledLayerView.o)
"_RMTileDummy", referenced from:
-[RMFractalTileProjection normaliseTile:] in libMapView.a(RMFractalTileProjection.o)
"_RMTileKey", referenced from:
+[RMTileCache tileHash:] in libMapView.a(RMTileCache.o)
-[RMAbstractWebMapSource imageForTile:inCache:] in libMapView.a(RMAbstractWebMapSource.o)
___47-[RMAbstractWebMapSource imageForTile:inCache:]_block_invoke in libMapView.a(RMAbstractWebMapSource.o)
___47-[RMAbstractWebMapSource imageForTile:inCache:]_block_invoke108 in libMapView.a(RMAbstractWebMapSource.o)
___42-[RMCompositeSource imageForTile:inCache:]_block_invoke in libMapView.a(RMCompositeSource.o)
___42-[RMCompositeSource imageForTile:inCache:]_block_invoke_2 in libMapView.a(RMCompositeSource.o)
"_RMTileMake", referenced from:
-[RMMapTiledLayerView drawLayer:inContext:] in libMapView.a(RMMapTiledLayerView.o)
-[RMTileCache beginBackgroundCacheForTileSource:southWest:northEast:minZoom:maxZoom:] in libMapView.a(RMTileCache.o)
___85-[RMTileCache beginBackgroundCacheForTileSource:southWest:northEast:minZoom:maxZoom:]_block_invoke_2 in libMapView.a(RMTileCache.o)
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
I am truly at a loss as to why this is happening, my Research on s/o has drawn a blank so any information or pointers would be appreciated.

"_OBJC_CLASS_$_SBJsonParser", referenced from: objc-class-ref in YFStockSymbolSearch.o

Hi everybody.I has a problem when I building a xcode project contains BSYahooFinance classes.
The details of this problem:
Ld
/Users/yxu/Library/Developer/Xcode/DerivedData/exchange-avxwiknpprmcnlhgjynxlmbwglpm/Build/Products/Debug-iphonesimulator/exchange.app/exchange
normal i386
cd /Users/yxu/Documents/project/exchange
setenv IPHONEOS_DEPLOYMENT_TARGET 6.1
setenv PATH "/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.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 i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.1.sdk
-L/Users/yxu/Library/Developer/Xcode/DerivedData/exchange-avxwiknpprmcnlhgjynxlmbwglpm/Build/Products/Debug-iphonesimulator
-F/Users/yxu/Library/Developer/Xcode/DerivedData/exchange-avxwiknpprmcnlhgjynxlmbwglpm/Build/Products/Debug-iphonesimulator
-filelist /Users/yxu/Library/Developer/Xcode/DerivedData/exchange-avxwiknpprmcnlhgjynxlmbwglpm/Build/Intermediates/exchange.build/Debug-iphonesimulator/exchange.build/Objects-normal/i386/exchange.LinkFileList
-Xlinker -objc_abi_version -Xlinker 2 -fobjc-arc -fobjc-link-runtime -Xlinker -no_implicit_dylibs -mios-simulator-version-min=6.1 -framework CoreData -framework CoreFoundation -lxml2 -lz -framework MobileCoreServices -framework SystemConfiguration -framework CFNetwork
-framework UIKit -framework Foundation -framework CoreGraphics -o /Users/yxu/Library/Developer/Xcode/DerivedData/exchange-avxwiknpprmcnlhgjynxlmbwglpm/Build/Products/Debug-iphonesimulator/exchange.app/exchange
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_SBJsonParser", referenced from:
objc-class-ref in YFStockSymbolSearch.o
objc-class-ref in YFStockDetailsLoader.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed
with exit code 1 (use -v to see invocation)
I have found many answers like "find the .m files are in your project" or "add the framworks needed" from google.I tried them all, but still couldn't solve this problem. Dose anybody of you can give me some suggestions or seen this problem before?
You need to link in a fat binary with the i386 object files for SBJsonParser into your target.

Apple Match - O Linker (Id) Error

I don't know what this error is saying. The retrievePatients method interacts with a WSDL file. What is the error exactly? What do I search for to fix it?
Thanks!
Ld /Users/chibb9/Library/Developer/Xcode/DerivedData/AllRelatedMethodsDemo-cixcxshgvqywvcgbqxcivzvomzuf/Build/Products/Debug-iphonesimulator/AllRelatedMethodsDemo.app/AllRelatedMethodsDemo normal i386
cd "/Users/chibb9/MEDiSN Research/AllRelatedMethodsDemo"
setenv MACOSX_DEPLOYMENT_TARGET 10.6
setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang
-arch i386 -isysroot /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator5.0.sdk
-L/Users/chibb9/Library/Developer/Xcode/DerivedData/AllRelatedMethodsDemo-cixcxshgvqywvcgbqxcivzvomzuf/Build/Products/Debug-iphonesimulator
-F/Users/chibb9/Library/Developer/Xcode/DerivedData/AllRelatedMethodsDemo-cixcxshgvqywvcgbqxcivzvomzuf/Build/Products/Debug-iphonesimulator
-filelist /Users/chibb9/Library/Developer/Xcode/DerivedData/AllRelatedMethodsDemo-cixcxshgvqywvcgbqxcivzvomzuf/Build/Intermediates/AllRelatedMethodsDemo.build/Debug-iphonesimulator/AllRelatedMethodsDemo.build/Objects-normal/i386/AllRelatedMethodsDemo.LinkFileList
-mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -lxml2 -Xlinker -no_implicit_dylibs -D__IPHONE_OS_VERSION_MIN_REQUIRED=50000 -framework SystemConfiguration -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/chibb9/Library/Developer/Xcode/DerivedData/AllRelatedMethodsDemo-cixcxshgvqywvcgbqxcivzvomzuf/Build/Products/Debug-iphonesimulator/AllRelatedMethodsDemo.app/AllRelatedMethodsDemo
Undefined symbols for architecture i386: "_retrievePatients", referenced from:
-[MEDiSN20AidnWebServiceRunner run] in MEDiSN20AidnWebServiceRunner.o "_OBJC_METACLASS_$_NSManagedObject", referenced from:
_OBJC_METACLASS_$_Download in Download.o "_OBJC_CLASS_$_NSManagedObject", referenced from:
_OBJC_CLASS_$_Download in Download.o ld: symbol(s) not found for architecture i386 clang: error: linker command failed with exit code 1 (use -v to see invocation)
In Download.h or .m, link against and #import <CoreData/CoreData.h>

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