apple mach-o linker (id) error getting confused with this

Question

I just opened my project which was made in xcode 3.1.5 version in xcode 4.2 and am getting the following error's can anyone please help me in this regard.

1)

Ld /Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator/ARecipeViewer.app/ARecipeViewer normal i386
    cd /Users/hasmukh.mandavia/Desktop/DevelopmentArea/ARecipe
    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/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator -L/Users/hasmukh.mandavia/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/lib -L/Users/hasmukh.mandavia/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/lib/gstreamer-0.10 -L/Users/hasmukh.mandavia/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.0.sdk/lib/pkgconfig -F/Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator -filelist /Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Intermediates/ARecipeViewer.build/Debug-iphonesimulator/ARecipeViewer.build/Objects-normal/i386/ARecipeViewer.LinkFileList -mmacosx-version-min=10.6 -Xlinker -objc_abi_version -Xlinker 2 -lpocketsphinx -lsphinxbase -Xlinker -no_implicit_dylibs -D__IPHONE_OS_VERSION_MIN_REQUIRED=30100 -framework Foundation -framework UIKit -lsqlite3.0 -framework AudioToolbox -framework CFNetwork -liconv -lcv -lcxcore -framework CoreGraphics -framework QuartzCore -framework OpenGLES -o /Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator/ARecipeViewer.app/ARecipeViewer

ld: library not found for -lcv
Command /Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/clang failed with exit code 1

2)

GenerateDSYMFile /Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator/ARecipeViewer.app.dSYM /Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator/ARecipeViewer.app/ARecipeViewer
    cd /Users/hasmukh.mandavia/Desktop/DevelopmentArea/ARecipe
    setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Developer/usr/bin/dsymutil /Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator/ARecipeViewer.app/ARecipeViewer -o /Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator/ARecipeViewer.app.dSYM

error: unable to open executable '/Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator/ARecipeViewer.app/ARecipeViewer'

Answer 1

1.) As the first error says

ld: library not found for -lcv

It means your project needs a static library for 'cv' and either its is not there in your project or placed at some different location(if you are using it)

or

you are putting additional compiler flag in build settings(if you are not using the library in your code). following compiler flags in build settings.

-liconv -lcv -lcxcore

put cv library at right location.(so that it can be included in project).

2.) Second error may be because .app file is yet not created in derived data directory. Go at path shown in error, ie. and verify whether .app file exist or not.

error: unable to open executable '/Users/hasmukh.mandavia/Library/Developer/Xcode/DerivedData/ARecipeViewer-cdsqawgcznmakicuonkiinivjeed/Build/Products/Debug-iphonesimulator/ARecipeViewer.app/ARecipeViewer'