很多：'Apple Mach-O鏈接程序錯誤'

Question

我在Xcode中製作了一個使用DropBox API的iPhone應用程序。我有23個錯誤，均命名爲Apple Mach-O Linker錯誤。我已經將我的二進制文件與Dropbox庫以及SystemConfiguration，QuartzCore，Security，CFNetwork，CoreGraphics，UIKit和Foundation鏈接起來。我沒有使用所有這些框架，但DropBox告訴我，我必須導入其中的一些框架，而剩下的部分我正在使用。

我該怎麼辦？

這裏是錯誤之一：

Ld /Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop-fwhwffwawcnkfwbxvokogcjaaahb/Build/Products/Debug-iphoneos/SnapDrop.app/SnapDrop normal armv7 
    cd /Users/Zach/Desktop/SnapDrop 
    setenv IPHONEOS_DEPLOYMENT_TARGET 7.0 
    setenv PATH "/Applications/Xcode5-DP3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode5-DP3.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin" 
    /Applications/Xcode5-DP3.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch armv7 -isysroot /Applications/Xcode5-DP3.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS7.0.sdk -L/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop-fwhwffwawcnkfwbxvokogcjaaahb/Build/Products/Debug-iphoneos -F/Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop-fwhwffwawcnkfwbxvokogcjaaahb/Build/Products/Debug-iphoneos -F/Users/Zach/Desktop/SnapDrop -F/Users/Zach/Desktop/SnapDrop/../../Downloads/dropbox-ios-sync-sdk-1-1.1.0 -filelist /Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop-fwhwffwawcnkfwbxvokogcjaaahb/Build/Intermediates/SnapDrop.build/Debug-iphoneos/SnapDrop.build/Objects-normal/armv7/SnapDrop.LinkFileList -dead_strip -fobjc-arc -fobjc-link-runtime -miphoneos-version-min=7.0 -framework Dropbox -framework QuartzCore -framework SystemConfiguration -framework Security -framework CFNetwork -framework CoreGraphics -framework UIKit -framework Foundation -Xlinker -dependency_info -Xlinker /Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop-fwhwffwawcnkfwbxvokogcjaaahb/Build/Intermediates/SnapDrop.build/Debug-iphoneos/SnapDrop.build/Objects-normal/armv7/SnapDrop_dependency_info.dat -o /Users/Zach/Library/Developer/Xcode/DerivedData/SnapDrop-fwhwffwawcnkfwbxvokogcjaaahb/Build/Products/Debug-iphoneos/SnapDrop.app/SnapDrop 

Undefined symbols for architecture armv7: 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::append(char const*)", referenced from: 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     dbx_url_encode(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in Dropbox(util.o) 
     dbx_build_url_with_params(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(util.o) 
    "operator new(unsigned long)", referenced from: 
     std::__1::__function::__func<HttpRequester::HttpRequester(dbx_env*, LifecycleManager&, std::__1::mutex*, void*, void (*)(void*), void*)::'lambda'(), std::__1::allocator<HttpRequester::HttpRequester(dbx_env*, LifecycleManager&, std::__1::mutex*, void*, void (*)(void*), void*)::'lambda'()>, void()>::__clone() const in Dropbox(env.o) 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::reserve(unsigned long)", referenced from: 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     dbx_url_encode(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in Dropbox(util.o) 
     dbx_build_url_with_params(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(util.o) 
    "std::__1::chrono::system_clock::now()", referenced from: 
     std::__1::cv_status std::__1::condition_variable::wait_for<long long, std::__1::ratio<1ll, 1000ll> >(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::duration<long long, std::__1::ratio<1ll, 1000ll> > const&) in Dropbox(sync.o) 
     std::__1::cv_status std::__1::condition_variable::wait_for<long, std::__1::ratio<3600ll, 1ll> >(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::duration<long, std::__1::ratio<3600ll, 1ll> > const&) in Dropbox(api.o) 
    "std::__1::chrono::steady_clock::now()", referenced from: 
     std::__1::cv_status std::__1::condition_variable::wait_for<long long, std::__1::ratio<1ll, 1000ll> >(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::duration<long long, std::__1::ratio<1ll, 1000ll> > const&) in Dropbox(sync.o) 
     std::__1::cv_status std::__1::condition_variable::wait_for<long, std::__1::ratio<3600ll, 1ll> >(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::duration<long, std::__1::ratio<3600ll, 1ll> > const&) in Dropbox(api.o) 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::assign(char const*)", referenced from: 
     dbx_access_info::is_valid(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >&) const in Dropbox(sync.o) 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     dbx_build_url_with_params(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(util.o) 
    "std::__1::__throw_system_error(int, char const*)", referenced from: 
     std::__1::unique_lock<std::__1::mutex>::unlock() in Dropbox(transfer.o) 
     std::__1::unique_lock<std::__1::mutex>::lock() in Dropbox(transfer.o) 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::append(char const*, unsigned long)", referenced from: 
     dbx_build_url_with_params(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(util.o) 
    "std::__1::condition_variable::wait(std::__1::unique_lock<std::__1::mutex>&)", referenced from: 
     LifecycleManager::shutdown() in Dropbox(init.o) 
     dbx_env::log_upload_thread() in Dropbox(env.o) 
    "std::nothrow", referenced from: 
     _dropbox_env_init in Dropbox(init.o) 
     _dropbox_account_init in Dropbox(init.o) 
     HttpRequester::create(dbx_env*, LifecycleManager&, std::__1::mutex*, void*, void (*)(void*)) in Dropbox(env.o) 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     ThreadLocal<dbx_error_buf>::get() in Dropbox(util.o) 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::~basic_string()", referenced from: 
     dbx_env::~dbx_env() in Dropbox(init.o) 
     build_authed_url(dbx_account const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(api.o) 
     dbx_request_json(dbx_account*, HttpRequester&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&, char const*, int, std::initializer_list<int> const&, std::__1::unique_ptr<json_t, json_deleter>&) in Dropbox(api.o) 
     _dropbox_api_unlink in Dropbox(api.o) 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     dbx_upload_log_file(dbx_env const*, HttpRequester&, char const*, long long, long long, char const*, long long) in Dropbox(api.o) 
     dbx_build_url_with_params(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(util.o) 
     ... 
    "std::__1::condition_variable::notify_all()", referenced from: 
     LifecycleManager::kick_cvars() in Dropbox(init.o) 
     LifecycleManager::ThreadRegistration::~ThreadRegistration() in Dropbox(transfer.o) 
     LifecycleManager::ThreadRegistration::ThreadRegistration(LifecycleManager&) in Dropbox(transfer.o) 
     dbx_env::dump_log_buffer() const in Dropbox(env.o) 
     dbx_env::log_upload_thread() in Dropbox(env.o) 
    "std::__1::condition_variable::~condition_variable()", referenced from: 
     _dropbox_account_init in Dropbox(init.o) 
     _dropbox_account_destroy in Dropbox(init.o) 
     dbx_env::~dbx_env() in Dropbox(init.o) 
     __GLOBAL__I_a in Dropbox(env.o) 
    "std::__1::mutex::unlock()", referenced from: 
     _dropbox_set_online in Dropbox(init.o) 
     _dropbox_lib_setup in Dropbox(init.o) 
     _dropbox_env_shutdown in Dropbox(init.o) 
     _dropbox_account_init in Dropbox(init.o) 
     _dropbox_account_shutdown in Dropbox(init.o) 
     void LifecycleManager::all_lock_helper<void, dropbox_set_online::$_0>(vq_node<std::__1::mutex&>*, dropbox_set_online::$_0) in Dropbox(init.o) 
     LifecycleManager::shutdown() in Dropbox(init.o) 
     ... 
    "operator new(unsigned long, std::nothrow_t const&)", referenced from: 
     _dropbox_env_init in Dropbox(init.o) 
     _dropbox_account_init in Dropbox(init.o) 
     HttpRequester::create(dbx_env*, LifecycleManager&, std::__1::mutex*, void*, void (*)(void*)) in Dropbox(env.o) 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     ThreadLocal<dbx_error_buf>::get() in Dropbox(util.o) 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::push_back(char)", referenced from: 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     dbx_url_encode(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in Dropbox(util.o) 
     dbx_build_url_with_params(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(util.o) 
    "std::__1::condition_variable::__do_timed_wait(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::time_point<std::__1::chrono::system_clock, std::__1::chrono::duration<long long, std::__1::ratio<1ll, 1000000000ll> > >)", referenced from: 
     std::__1::cv_status std::__1::condition_variable::wait_for<long long, std::__1::ratio<1ll, 1000ll> >(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::duration<long long, std::__1::ratio<1ll, 1000ll> > const&) in Dropbox(sync.o) 
     std::__1::cv_status std::__1::condition_variable::wait_for<long, std::__1::ratio<3600ll, 1ll> >(std::__1::unique_lock<std::__1::mutex>&, std::__1::chrono::duration<long, std::__1::ratio<3600ll, 1ll> > const&) in Dropbox(api.o) 
    "std::__1::mutex::~mutex()", referenced from: 
     _dropbox_account_init in Dropbox(init.o) 
     _dropbox_account_destroy in Dropbox(init.o) 
     dbx_env::~dbx_env() in Dropbox(init.o) 
     __GLOBAL__I_a in Dropbox(init.o) 
     __GLOBAL__I_a in Dropbox(env.o) 
    "operator delete(void*)", referenced from: 
     _dropbox_env_destroy in Dropbox(init.o) 
     _dropbox_account_init in Dropbox(init.o) 
     _dropbox_account_destroy in Dropbox(init.o) 
     dbx_env::log_upload_thread() in Dropbox(env.o) 
     std::__1::__function::__func<HttpRequester::HttpRequester(dbx_env*, LifecycleManager&, std::__1::mutex*, void*, void (*)(void*), void*)::'lambda'(), std::__1::allocator<HttpRequester::HttpRequester(dbx_env*, LifecycleManager&, std::__1::mutex*, void*, void (*)(void*), void*)::'lambda'()>, void()>::~__func() in Dropbox(env.o) 
     std::__1::__function::__func<HttpRequester::HttpRequester(dbx_env*, LifecycleManager&, std::__1::mutex*, void*, void (*)(void*), void*)::'lambda'(), std::__1::allocator<HttpRequester::HttpRequester(dbx_env*, LifecycleManager&, std::__1::mutex*, void*, void (*)(void*), void*)::'lambda'()>, void()>::destroy_deallocate() in Dropbox(env.o) 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     ... 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::__init(char const*, unsigned long)", referenced from: 
     dbx_env::dbx_env(dbx_http const*, dbx_env_config const*) in Dropbox(init.o) 
     build_authed_url(dbx_account const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(api.o) 
     _dropbox_api_unlink in Dropbox(api.o) 
     dbx_api_account_info(dbx_account*, std::__1::unique_ptr<dbx_account_info, dbx_account_info_deleter>*, std::__1::unique_ptr<dbx_access_info, std::__1::default_delete<dbx_access_info> >*, HttpRequester&, int) in Dropbox(api.o) 
     dbx_upload_log_file(dbx_env const*, HttpRequester&, char const*, long long, long long, char const*, long long) in Dropbox(api.o) 
    "std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >::basic_string(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&)", referenced from: 
     build_authed_url(dbx_account const*, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::initializer_list<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > const&) in Dropbox(api.o) 
     dbx_upload_log_file(dbx_env const*, HttpRequester&, char const*, long long, long long, char const*, long long) in Dropbox(api.o) 
    "std::__1::mutex::lock()", referenced from: 
     _dropbox_set_online in Dropbox(init.o) 
     _dropbox_lib_setup in Dropbox(init.o) 
     _dropbox_env_shutdown in Dropbox(init.o) 
     _dropbox_account_init in Dropbox(init.o) 
     _dropbox_account_shutdown in Dropbox(init.o) 
     void LifecycleManager::all_lock_helper<void, dropbox_set_online::$_0>(vq_node<std::__1::mutex&>*, dropbox_set_online::$_0) in Dropbox(init.o) 
     LifecycleManager::shutdown() in Dropbox(init.o) 
     ... 
ld: symbol(s) not found for architecture armv7 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 

Answer 1

你沒有提到加libc++.dylib。每https://www.dropbox.com/developers/sync/sdks/ios：

確保您有CFNetwork.framework，Security.framework， SystemConfiguration.framework，QuartzCore.framework和的libC++ dylib 添加到項目中。爲此，請在 文件資源管理器中選擇您的項目文件，選擇您的目標，然後選擇Build Phases 子選項卡。在Link Binary with Libraries下，按下+按鈕，選擇 CFNetwork.framework，然後按添加。重複執行Security.framework， SystemConfiguration.framework，QuartzCore.framework和libC++。dylib。

請讓我知道是否有設置說明某處沒有提到libc++.dylib。

Answer 2

你可以嘗試添加libstdC++。dylib。