使用帶檢查器的Makefile構建clang時的鏈接器錯誤

Question

我在鏈接階段遇到問題。

我想要做什麼？

我想添加一個檢查鐺。我從源代碼構建LLVM和libC++（是的，在構建之後，在libcxx測試期間某些測試失敗）。爲了識別libC++庫，我將以下代碼添加到了Clang的根目錄Makefile

CXX.Flags += -stdlib=libc++ 
CXX.Flags += -std=c++11 
CXX.Flags += -nostdinc++ 
CXX.Flags += -I/path/to/my/own/c++library/libcxx/include 
LD.Flags += -L/path/to/my/own/c++library/libcxx/lib 

鏈接器問題如下所示。

Undefined symbols for architecture x86_64: 
"std::__1::__shared_weak_count::__get_deleter(std::type_info const&) const", referenced from: 
     vtable for std::__1::__shared_ptr_p-traits<char> >& std::__1::operator<<<std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<char, std::__1::char_traits<char>, std::__1::allocator<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::regex_traits<char>::__init() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::ios_base::getloc() const", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<char, std::__1::char_traits<char>, std::__1::allocator<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::__get_classname(char const*, bool)", referenced from: 
     unsigned int std::__1::regex_traits<char>::__lookup_classname<char const*>(char const*, char const*, bool, char) const in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::__shared_weak_count::__add_shared()", referenced from: 
     std::__1::basic_regex<char, std::__1::regex_traits<char> >::basic_regex(std::__1::basic_regex<char, std::__1::regex_traits<char> > const&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::__shared_weak_count::__release_shared()", referenced from: 
     std::__1::shared_ptr<std::__1::__empty_state<char> >::~shared_ptr() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::__shared_weak_count::~__shared_weak_count()", referenced from: 
     std::__1::__shared_ptr_pointer<std::__1::__empty_state<char>*, std::__1::default_delete<std::__1::__empty_state<char> >, std::__1::allocator<std::__1::__empty_state<char> > >::~__shared_ptr_pointer() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::__get_collation_name(char const*)", referenced from: 
     std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > std::__1::regex_traits<char>::__lookup_collatename<char const*>(char const*, char const*, char) const in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > std::__1::regex_traits<char>::__lookup_collatename<char*>(char*, char*, char) const in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::cout", referenced from: 
     (anonymous namespace)::ObjCSelfInitChecker::checkPreStmt(clang::ObjCStringLiteral const*, clang::ento::CheckerContext&) const in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::ctype<char>::id", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<char, std::__1::char_traits<char>, std::__1::allocator<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::regex_traits<char>::__init() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::locale::locale(std::__1::locale const&)", referenced from: 
     std::__1::basic_regex<char, std::__1::regex_traits<char> >::__start_matching_list(bool) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::regex_traits<char>::regex_traits(std::__1::regex_traits<char> const&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::locale::locale()", referenced from: 
     std::__1::regex_traits<char>::regex_traits() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::locale::~locale()", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::endl<char, std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::regex_traits<char>::~regex_traits() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<char, std::__1::char_traits<char>, std::__1::allocator<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_regex<char, std::__1::regex_traits<char> >::__start_matching_list(bool) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::collate<char>::id", referenced from: 
     std::__1::regex_traits<char>::__init() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "std::__1::ios_base::clear(unsigned int)", referenced from: 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<std::__1::char_traits<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, char const*) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >::put(char) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >::flush() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >::sentry::~sentry() in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
     std::__1::basic_ostream<char, std::__1::char_traits<char> >& std::__1::operator<<<char, std::__1::char_traits<char>, std::__1::allocator<char> >(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    "vtable for std::__1::__shared_count", referenced from: 
     std::__1::shared_ptr<std::__1::__empty_state<char> >::shared_ptr<std::__1::__empty_state<char>, void>(std::__1::__empty_state<char>*) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    NOTE: a missing vtable usually means the first non-inline virtual member function has no definition. 
    "vtable for std::__1::__shared_weak_count", referenced from: 
     std::__1::shared_ptr<std::__1::__empty_state<char> >::shared_ptr<std::__1::__empty_state<char>, void>(std::__1::__empty_state<char>*) in libclangStaticAnalyzerCheckers.a(ObjCSelfInitChecker.o) 
    NOTE: a missing vtable usually means the first non-inline virtual member function has no definition. 
ld: symbol(s) not found for architecture x86_64 
clang: error: linker command failed with exit code 1 (use -v to see invocation) 
make[2]: *** [/Users/msecurity/Documents/Deepak/Eclipse/clang_build/build/Debug+Asserts/bin/clang] Error 1 
make[1]: *** [driver/.makeall] Error 2 
make: *** [all] Error 1 

我按照鏈接器的建議使用-v選項來查看鏈接器調用，並獲得以下輸出。

"/usr/bin/ld" -demangle -dynamic -arch x86_64 -macosx_version_min 10.8.0 -o /path/to/onw/clang/build/Debug+Asserts/bin/clang -L/path/to/onw/clang//build/Debug+Asserts/lib -L/path/to/onw/clang/build/Debug+Asserts/lib -L/path/to/libc++/build/libcxx/lib -rpath @executable_path/../lib -sectcreate __TEXT __info_plist /path/to/onw/clang/build/tools/clang/tools/driver/Debug+Asserts/Info.plist /path/to/onw/clang/build/tools/clang/tools/driver/Debug+Asserts/cc1_main.o /path/to/onw/clang/build/tools/clang/tools/driver/Debug+Asserts/cc1as_main.o /path/to/onw/clang/build/tools/clang/tools/driver/Debug+Asserts/driver.o -lclangFrontendTool -lclangFrontend -lclangDriver -lclangSerialization -lclangCodeGen -lclangParse -lclangSema -lclangStaticAnalyzerFrontend -lclangStaticAnalyzerCheckers -lclangStaticAnalyzerCore -lclangARCMigrate -lclangRewriteFrontend -lclangRewriteCore -lclangAnalysis -lclangEdit -lclangAST -lclangBasic -lclangLex -lLLVMOption -lLLVMLinker -lLLVMIRReader -lLLVMipo -lLLVMVectorize -lLLVMInstrumentation -lLLVMBitWriter -lLLVMBitReader -lLLVMAsmParser -lLLVMR600CodeGen -lLLVMR600Desc -lLLVMR600Info -lLLVMR600AsmPrinter -lLLVMSystemZDisassembler -lLLVMSystemZCodeGen -lLLVMSystemZAsmParser -lLLVMSystemZDesc -lLLVMSystemZInfo -lLLVMSystemZAsmPrinter -lLLVMHexagonCodeGen -lLLVMHexagonAsmPrinter -lLLVMHexagonDesc -lLLVMHexagonInfo -lLLVMNVPTXCodeGen -lLLVMNVPTXDesc -lLLVMNVPTXInfo -lLLVMNVPTXAsmPrinter -lLLVMCppBackendCodeGen -lLLVMCppBackendInfo -lLLVMMSP430CodeGen -lLLVMMSP430Desc -lLLVMMSP430Info -lLLVMMSP430AsmPrinter -lLLVMXCoreDisassembler -lLLVMXCoreCodeGen -lLLVMXCoreDesc -lLLVMXCoreInfo -lLLVMXCoreAsmPrinter -lLLVMMipsDisassembler -lLLVMMipsCodeGen -lLLVMMipsAsmParser -lLLVMMipsDesc -lLLVMMipsInfo -lLLVMMipsAsmPrinter -lLLVMARMDisassembler -lLLVMARMCodeGen -lLLVMARMAsmParser -lLLVMARMDesc -lLLVMARMInfo -lLLVMARMAsmPrinter -lLLVMAArch64Disassembler -lLLVMAArch64CodeGen -lLLVMAArch64AsmParser -lLLVMAArch64Desc -lLLVMAArch64Info -lLLVMAArch64AsmPrinter -lLLVMAArch64Utils -lLLVMPowerPCCodeGen -lLLVMPowerPCAsmParser -lLLVMPowerPCDesc -lLLVMPowerPCInfo -lLLVMPowerPCAsmPrinter -lLLVMSparcCodeGen -lLLVMSparcDesc -lLLVMSparcInfo -lLLVMX86Disassembler -lLLVMX86AsmParser -lLLVMX86CodeGen -lLLVMSelectionDAG -lLLVMAsmPrinter -lLLVMMCParser -lLLVMCodeGen -lLLVMObjCARCOpts -lLLVMScalarOpts -lLLVMInstCombine -lLLVMTransformUtils -lLLVMipa -lLLVMAnalysis -lLLVMX86Desc -lLLVMX86Info -lLLVMTarget -lLLVMX86AsmPrinter -lLLVMMC -lLLVMObject -lLLVMX86Utils -lLLVMCore -lLLVMSupport -lz -lpthread -lcurses -lm -lstdc++ -lSystem /usr/bin/../lib/clang/4.2/lib/darwin/libclang_rt.osx.a 

我觀察到，它使用的是我爲它的C++ 11庫，因爲它是第六屆選項上面調用到LD。還有其他選擇，我應該照顧？

如果有任何解決方案可用，我試圖谷歌出來，我發現這種問題在早期版本的llvm中存在缺少非內聯虛函數的vtable條目，並且使用最新版本幫助其他人。但我已經在使用llvm最新版本。以下是clang -v輸出

 
clang version 3.4 (trunk 192102) (llvm/trunk 192100) 
Target: x86_64-apple-darwin12.3.0 
Thread model: posix 

請指導我解決問題的可能方法。讓我知道是否需要分享更多細節。如果我以任何方式違反任何約定或規範（這是我在StackOverflow上的第一個問題），我很抱歉，請讓我知道。

請注意：我之前添加了一個檢查器，它工作正常，並實現了我的目的。當我試圖包含標準C++頭文件< regex >來擴展相同的檢查器時，上述所有問題都會引發。

Answer 1

正如您在鏈接器cmdline中看到的，您嘗試使用libstdC++（-lstdC++）進行鏈接。所以，你正在用libC++編譯的對象與libstdC++

Answer 2

已解決問題。使用以下配置選項編譯LLVM幫助我解決了這個問題。

../llvm/configure \ CXXFLAGS="-stdlib=libc++ -std=c++11" \ OBJCXXFLAGS="-stdlib=libc++ -std=c++11" \ LDFLAGS="-stdlib=libc++"

可能會幫助別人一天。謝謝你們。