链接器错误断言失败：（atom-＆gt; fixupCount（）== 1）

时间：2011-08-25 17:38:25

标签： ios xcode4 llvm-gcc

使用Xcode 4.0.2 ，我有一个在模拟器中正确编译，链接和运行的目标。但是，当我为iOS设备编译并链接它时，我得到以下（完整）链接器错误：

Ld /Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos/FrameworkHarness.app/FrameworkHarness normal armv7
    cd /Users/mike/src/FOO/FOObar
    setenv IPHONEOS_DEPLOYMENT_TARGET 4.2
    setenv PATH "/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
    /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-gcc-4.2 -arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk -L/Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos -F/Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos -filelist /Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Intermediates/FOObar.build/Debug-iphoneos/FrameworkHarness.build/Objects-normal/armv7/FrameworkHarness.LinkFileList -dead_strip -miphoneos-version-min=4.2 -framework FOObar -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos/FrameworkHarness.app/FrameworkHarness

Assertion failed: (atom->fixupCount() == 1), function targetCString, file /SourceCache/ld64/ld64-123.3/src/ld/parsers/macho_relocatable_file.cpp, line 4831.
0  0x13886  __assert_rtn + 86
1  0x2dfd8  mach_o::relocatable::PointerToCStringSection<arm>::targetCString(mach_o::relocatable::Atom<arm> const*, ld::IndirectBindingTable const&) const + 280
2  0x2b27c  mach_o::relocatable::PointerToCStringSection<arm>::contentHash(mach_o::relocatable::Atom<arm> const*, ld::IndirectBindingTable const&) const + 76
3  0x2c57f  mach_o::relocatable::Atom<arm>::contentHash(ld::IndirectBindingTable const&) const + 47
4  0xae870  ld::tool::SymbolTable::findSlotForReferences(ld::Atom const*, ld::Atom const**) + 704
5  0xb21dc  ld::tool::Resolver::convertReferencesToIndirect(ld::Atom const&) + 268
6  0xb33f2  ld::tool::Resolver::doAtom(ld::Atom const&) + 642
7  0x21f7c  mach_o::relocatable::File<arm>::forEachAtom(ld::File::AtomHandler&) const + 60
8  0xaa29e  ld::tool::InputFiles::forEachInitialAtom(ld::File::AtomHandler&) const + 46
9  0xb5924  ld::tool::Resolver::resolve() + 84
10  0x14ff7  main + 871
collect2: ld returned 1 exit status

有人可以对此有所了解吗？

谢谢Mike

使用-v

进行调用 
/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/llvm-gcc-4.2 -v -arch armv7 -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk -L/Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos -F/Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos -filelist /Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Intermediates/FOObar.build/Debug-iphoneos/FrameworkHarness.build/Objects-normal/armv7/FrameworkHarness.LinkFileList -dead_strip -miphoneos-version-min=4.2 -framework FOObar -framework UIKit -framework Foundation -framework CoreGraphics -o /Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos/FrameworkHarness.app/FrameworkHarness
Using built-in specs.
Target: arm-apple-darwin10
Configured with: /var/tmp/llvmgcc42_Embedded/llvmgcc42_Embedded-2373.6~5/src/configure --enable-checking --enable-werror --prefix=/Developer/usr/llvm-gcc-4.2 --mandir=/Developer/usr/llvm-gcc-4.2/share/man --enable-languages=c,objc,c++,obj-c++ --program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin10 --enable-llvm=/var/tmp/llvmgcc42_Embedded/llvmgcc42_Embedded-2373.6~5/dst-llvmCore/Developer/usr/local --enable-werror-always --program-prefix=arm-apple-darwin10- --host=i686-apple-darwin10 --target=arm-apple-darwin10 --with-gxx-include-dir=/usr/include/c++/4.2.1 --with-build-sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.Internal.sdk
Thread model: posix
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2373.6)
 /Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/../libexec/gcc/arm-apple-darwin10/4.2.1/collect2 -dynamic -arch armv7 -dead_strip -iphoneos_version_min 4.2 -syslibroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk -weak_reference_mismatches non-weak -o /Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos/FrameworkHarness.app/FrameworkHarness -lcrt1.3.1.o -L/Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos -L/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/../lib/gcc/arm-apple-darwin10/4.2.1/v7 -L/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.3.sdk/usr/lib -L/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/../lib/gcc/arm-apple-darwin10/4.2.1 -L/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/../lib/gcc -L/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/../lib/gcc/arm-apple-darwin10/4.2.1/../../.. -filelist /Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Intermediates/FOObar.build/Debug-iphoneos/FrameworkHarness.build/Objects-normal/armv7/FrameworkHarness.LinkFileList -framework FOObar -framework UIKit -framework Foundation -framework CoreGraphics -lgcc_s.1 -lgcc -lSystem -F/Users/mike/Library/Developer/Xcode/DerivedData/FOObar-ezjrxybxyybadxguvscgaqtaelju/Build/Products/Debug-iphoneos
Assertion failed: (atom->fixupCount() == 1), function targetCString, file /SourceCache/ld64/ld64-123.3/src/ld/parsers/macho_relocatable_file.cpp, line 4831.
0  0x13886  __assert_rtn + 86
1  0x2dfd8  mach_o::relocatable::PointerToCStringSection<arm>::targetCString(mach_o::relocatable::Atom<arm> const*, ld::IndirectBindingTable const&) const + 280
2  0x2b27c  mach_o::relocatable::PointerToCStringSection<arm>::contentHash(mach_o::relocatable::Atom<arm> const*, ld::IndirectBindingTable const&) const + 76
3  0x2c57f  mach_o::relocatable::Atom<arm>::contentHash(ld::IndirectBindingTable const&) const + 47
4  0xae870  ld::tool::SymbolTable::findSlotForReferences(ld::Atom const*, ld::Atom const**) + 704
5  0xb21dc  ld::tool::Resolver::convertReferencesToIndirect(ld::Atom const&) + 268
6  0xb33f2  ld::tool::Resolver::doAtom(ld::Atom const&) + 642
7  0x21f7c  mach_o::relocatable::File<arm>::forEachAtom(ld::File::AtomHandler&) const + 60
8  0xaa29e  ld::tool::InputFiles::forEachInitialAtom(ld::File::AtomHandler&) const + 46
9  0xb5924  ld::tool::Resolver::resolve() + 84
10  0x14ff7  main + 871
collect2: ld returned 1 exit status

其他详细信息

当我将名为FrameworkHarness的应用程序的已编译.m文件与我创建的名为FOOBar的框架链接时，就会发生这种情况。框架配方来自：http://db-in.com/blog/2011/07/universal-framework-iphone-ios-2-0/

我：

时没有链接错误
  • 使用FrameworkHarness的.m文件直接从FOObar框架编译.m文件。
  • 直接使用FrameworkHarness的.m文件从FOObar框架编译.m文件。
  • 将FOObar框架与已编译的FrameworkHarness的模拟器.m文件链接起来。

I：

时出现链接错误
  • 将FOObar框架与已编译的FrameworkHarness的.m文件链接到iOS设备。

我厌倦了通过从框架中删除5个区域之一来将问题与框架隔离开来。每次我将修改后的框架与iOS设备的已编译FrameworkHarness的.m文件相关联时，都没有链接错误。

接下来，我完整地离开了框架，但是从应用程序中移除了对框架中5个区域之一的调用。我能够隔离会导致iOS设备链接器问题的框架区域。我做了相同的过程删除框架中的代码，并能够识别链接时导致错误的特定代码。我在框架的那个区域移动了代码，链接错误消失了。然而，我移动的代码是肤浅的，我所做的只是将代码从一个函数移动到一个新函数，并从原始函数调用该函数。移动的代码是：

// Prompt are you sure?
NSString *message = [[NSString alloc] initWithFormat:@"Are you sure you want to remove the vlaue \"%@\" from the list?", [array objectAtIndex:[pickerView selectedRowInComponent:0]]];
UIAlertView *alertView =
    [[UIAlertView alloc] initWithTitle:@"Confirmation needed"
                               message:message
                              delegate:self
                     cancelButtonTitle:@"Keep"
                     otherButtonTitles:@"Remove", nil];
[message release];
[alertView show];
[alertView release];

使用nm来比较framworks符号

我在iOS设备上运行nm并模拟了框架。版本之间存在一些差异，但没有任何尖叫

nm -j -a

-j只显示符号名称（无值或类型）。 -a显示所有符号表条目，包括插入供调试器使用的条目。

diff nm.ios nm.sim 
125a126,134
> EH_Frame1
> EH_Frame1
> EH_Frame1
> EH_Frame1
> EH_Frame1
> EH_Frame1
> EH_Frame1
> EH_Frame1
> EH_Frame1
313d321
< ___divsi3
324a333
> _objc_msgSend_fpret
327a337,431
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
> func.eh
  • EH_Frame1和func.eh为“S”（上述以外的部分中的符号）
  • ___ divsi3和_objc_msgSend_fpret为“U”（未定义）

nm -j -g

-j只显示符号名称（无值或类型）。 -g仅显示全局（外部）符号。

diff nm.ios nm.sim 
83d82
< ___divsi3
89a89
> _objc_msgSend_fpret

nm -j -u

-j只显示符号名称（无值或类型）。 -u仅显示未定义的符号。

diff nm.ios nm.sim 
37d36
< ___divsi3
43a43
> _objc_msgSend_fpret

可能的后续步骤

是否有一个链接器标志告诉它吐出它正在工作的东西所以我可以在断言之前看到它在做什么？

2 个答案:

答案 0 :(得分：1)

升级到最新版本的Xcode（目前为4.1，不包括测试版）。这应该可以解决您的问题。

答案 1 :(得分：0)

这是链接器或编译器错误。您需要使用源和构建信息提交雷达。至少我们需要所有目标文件和链接线。

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