使用Swift Cocoa Framework的macOS命令行工具：未加载库

问题描述

尝试运行目标时抛出以下错误：

The following error is thrown when trying to run my target:

dyld: Library not loaded: @rpath/libswiftCore.dylib
  Referenced from: x/Xcode/DerivedData/x/Build/Products/Debug/PriorityQueue.framework/Versions/A/PriorityQueue
  Reason: image not found

我的目标是用Swift编写的命令行工具（macOS）。我正在使用以Swift编写的Cocoa框架（PriorityQueue）。当我在 Framework 上将 EMBEDDED_CONTENT_CONTAINS_SWIFT 设置为 YES 时，目标运行时显示以下警告：

My target is a Command Line Tool (macOS) written in Swift. I'm using a Cocoa Framework (PriorityQueue) written in Swift. When I set EMBEDDED_CONTENT_CONTAINS_SWIFT to YES on the Framework, the target runs with the following warnings:

objc[99144]: Class _TtC10Foundation15NSSimpleCString is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftFoundation.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtC10Foundation16NSConstantString is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftFoundation.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtC10Foundation15NSFastGenerator is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftFoundation.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCE10FoundationCSo12NSDictionary9Generator is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftFoundation.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs18_EmptyArrayStorage is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs24_ContiguousArrayStorage1 is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs36_NativeSetStorageKeyNSEnumeratorBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs26_NativeSetStorageOwnerBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs18_CocoaSetGenerator is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs43_NativeDictionaryStorageKeyNSEnumeratorBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs33_NativeDictionaryStorageOwnerBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs25_CocoaDictionaryGenerator is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs17NonObjectiveCBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs17_stdlib_AtomicInt is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs19_SwiftNativeNSArray is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs24_SwiftNativeNSDictionary is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs17_SwiftNativeNSSet is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs24_SwiftNativeNSEnumerator is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs31_stdlib_ReturnAutoreleasedDummy is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs20_SwiftNativeNSString is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs19_NSContiguousString is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs40_SwiftNativeNSArrayWithContiguousStorage is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs21_SwiftDeferredNSArray is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs27_ContiguousArrayStorageBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _TtCSs13VaListBuilder is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class SwiftObject is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _SwiftNativeNSArrayBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _SwiftNativeNSDictionaryBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _SwiftNativeNSSetBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _SwiftNativeNSStringBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.
objc[99144]: Class _SwiftNativeNSEnumeratorBase is implemented in both x/PriorityQueue.framework/Versions/A/Frameworks/libswiftCore.dylib and x/MyTargetName. One of the two will be used. Which one is undefined.

然后崩溃（可能无关）：

And then crashes with (could be unrelated):

MyTargetName[99144:2157492] *** NSForwarding: warning: object 0x1014346a0 of class 'Swift._NSContiguousString' does not implement methodSignatureForSelector: -- trouble ahead
Unrecognized selector -[Swift._NSContiguousString fileSystemRepresentation]

这是应该报告的Xcode问题，还是我

Is this an issue with Xcode that should be reported, or am I missing a setting somehow?

推荐答案

Swift软件包管理器设置了以下内容，从而在另一个项目中为我解决了此问题：

Swift Package Manager sets the following, which resolved this issue for me in another project:

SWIFT_FORCE_DYNAMIC_LINK_STDLIB = YES
SWIFT_FORCE_STATIC_LINK_STDLIB = NO

请注意，搜索路径设置为：

Note that the search path was set to:

LD_RUNPATH_SEARCH_PATHS = $(TOOLCHAIN_DIR)/usr/lib/swift/macosx @executable_path

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