使用带有Swift的C文件导致链接器错误

时间：2015-05-15 20:13:58

标签： ios c swift

我正在尝试this C库。我已将文件添加到我的项目中，并创建了一个Objective-C文件以跟随github页面上的示例。我已经在我的桥接头中导入了Objc文件，但是当我编译时我

Ld /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Products/Debug-iphoneos/trinkeSwift.app/trinkeSwift normal arm64
    cd /Users/nickporter/Developer/trinkeSwift
    export IPHONEOS_DEPLOYMENT_TARGET=8.0
    export 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 arm64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.3.sdk -L/Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Products/Debug-iphoneos -F/Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Products/Debug-iphoneos -filelist /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/trinkeSwift.LinkFileList -Xlinker -rpath -Xlinker @executable_path/Frameworks -dead_strip -fobjc-arc -fobjc-link-runtime -L/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/swift/iphoneos -Xlinker -add_ast_path -Xlinker /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/trinkeSwift.swiftmodule -miphoneos-version-min=8.0 -framework CoreGraphics -framework Foundation -framework UIKit -Xlinker -dependency_info -Xlinker /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/trinkeSwift_dependency_info.dat -o /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Products/Debug-iphoneos/trinkeSwift.app/trinkeSwift

duplicate symbol _str_time in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _mymodifier in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _fromModifier in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _timePointer in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _temp_time in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _set_time in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _curtime in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _initialTime in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _changeAmount in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _fromChangeAmount in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _specAmount in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _finalSpecAmount in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _unusedText in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/DateGenerator.o
duplicate symbol _str_time in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _changeAmount in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _fromChangeAmount in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _temp_time in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _set_time in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _specAmount in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _finalSpecAmount in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _mymodifier in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _fromModifier in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _timePointer in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _curtime in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _initialTime in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
duplicate symbol _unusedText in:
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/TimeParser.o
    /Users/nickporter/Library/Developer/Xcode/DerivedData/trinkeSwift-dhbvybojkdowcfffscchwxwgahyj/Build/Intermediates/trinkeSwift.build/Debug-iphoneos/trinkeSwift.build/Objects-normal/arm64/y.tab.o
ld: 28 duplicate symbols for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

我的Objc类中的代码是

+ (NSDate *)dateFromNatrualString:(NSString *)text
{
    NSString *when = text.lowercaseString;
    char *whenstr = (char *)[when UTF8String];
    time_t finalTime = parseDateTimeString(whenstr);
    str_time= localtime(&finalTime);
    NSString *thedate = [NSString stringWithCString:asctime(str_time) encoding:NSUTF8StringEncoding];

    NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
    formatter.dateFormat = @"EEEE MMM dd HH:mm:ss yyyy";


    return [formatter dateFromString:thedate];
}

有谁知道如何解决这个问题？

1 个答案:

答案 0 :(得分：4)

您正在使用的库是在TimeParser.h文件中定义符号。每当您在项目中的多个文件中包含该文件时，最终都会出现重复的定义。例如，错误日志中的前3个条目对应于TimeParser.h中定义的变量：str_time，mymodifier和frommodifier。

TimeParser.h应该只包含声明以避免此问题。为了帮助您了解声明和定义之间的区别，请参阅以下文章：What is the difference between a definition and a declaration?

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