I tried the "abi-tag patch version 4" attachment, and it appears to introduce some compiler crashes under 'make check-all'. Try out test/CodeGenCXX/static-local-in-local-class.cpp and you appear to get unbounded recursion:
$ gdb --args /home/steven/Development/llvm/build/Release/bin/clang -cc1 -internal-isystem /home/steven/Development/llvm/build/Release/bin/../lib/clang/3.7.0/include -nostdsysteminc -triple x86_64-linux -fblocks -emit-llvm -o - /home/steven/Development/llvm/tools/clang/test/CodeGenCXX/static-local-in-local-class.cpp -std=c++1y [...] (gdb) bt [...] #26382 0x00000000014814c3 in (anonymous namespace)::CXXNameMangler::mangleLocalName(clang::Decl const*, llvm::SmallVector<llvm::StringRef, 4u> const*, bool) () #26383 0x0000000001481ef7 in (anonymous namespace)::CXXNameMangler::mangleNameWithAbiTags(clang::NamedDecl const*, llvm::SmallVector<llvm::StringRef, 4u> const*, bool) () #26384 0x000000000147c030 in (anonymous namespace)::CXXNameMangler::mangleName(clang::NamedDecl const*, bool) () #26385 0x0000000001479308 in (anonymous namespace)::CXXNameMangler::mangleType(clang::QualType) () #26386 0x000000000147cb74 in (anonymous namespace)::CXXNameMangler::mangleFunctionEncoding(clang::FunctionDecl const*, bool) () #26387 0x00000000014814c3 in (anonymous namespace)::CXXNameMangler::mangleLocalName(clang::Decl const*, llvm::SmallVector<llvm::StringRef, 4u> const*, bool) () #26388 0x0000000001481ef7 in (anonymous namespace)::CXXNameMangler::mangleNameWithAbiTags(clang::NamedDecl const*, llvm::SmallVector<llvm::StringRef, 4u> const*, bool) () #26389 0x000000000147c030 in (anonymous namespace)::CXXNameMangler::mangleName(clang::NamedDecl const*, bool) () #26390 0x0000000001479308 in (anonymous namespace)::CXXNameMangler::mangleType(clang::QualType) () #26391 0x000000000147cb74 in (anonymous namespace)::CXXNameMangler::mangleFunctionEncoding(clang::FunctionDecl const*, bool) () #26392 0x00000000014814c3 in (anonymous namespace)::CXXNameMangler::mangleLocalName(clang::Decl const*, llvm::SmallVector<llvm::StringRef, 4u> const*, bool) () #26393 0x0000000001481ef7 in (anonymous namespace)::CXXNameMangler::mangleNameWithAbiTags(clang::NamedDecl const*, llvm::SmallVector<llvm::StringRef, 4u> const*, bool) () #26394 0x000000000147c030 in (anonymous namespace)::CXXNameMangler::mangleName(clang::NamedDecl const*, bool) () #26395 0x0000000001479308 in (anonymous namespace)::CXXNameMangler::mangleType(clang::QualType) () #26396 0x000000000147cb74 in (anonymous namespace)::CXXNameMangler::mangleFunctionEncoding(clang::FunctionDecl const*, bool) () #26397 0x0000000001481367 in (anonymous namespace)::ItaniumMangleContextImpl::mangleCXXName(clang::NamedDecl const*, llvm::raw_ostream&) () #26398 0x00000000009e9eae in clang::CodeGen::CodeGenModule::getMangledName(clang::GlobalDecl) () #26399 0x00000000009eb14a in clang::CodeGen::CodeGenModule::GetAddrOfFunction(clang::GlobalDecl, llvm::Type*, bool, bool) () #26400 0x0000000000abf7c0 in clang::CodeGen::CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(clang::CallExpr const*, clang::CXXMethodDecl const*, clang::CodeGen::ReturnValueSlot, bool, clang::NestedNameSpecifier*, bool, clang::Expr const*) () #26401 0x0000000000abfe63 in clang::CodeGen::CodeGenFunction::EmitCXXOperatorMemberCallExpr(clang::CXXOperatorCallExpr const*, clang::CXXMethodDecl const*, clang::CodeGen::ReturnValueSlot) () #26402 0x0000000000ab4d3f in clang::CodeGen::CodeGenFunction::EmitCallExpr(clang::CallExpr const*, clang::CodeGen::ReturnValueSlot) () #26403 0x0000000000ab4f7a in clang::CodeGen::CodeGenFunction::EmitCallExprLValue(clang::CallExpr const*) () #26404 0x0000000000ab1a56 in clang::CodeGen::CodeGenFunction::EmitLValue(clang::Expr const*) () #26405 0x0000000000ab1de9 in clang::CodeGen::CodeGenFunction::EmitCastLValue(clang::CastExpr const*) () #26406 0x0000000000ab1a3e in clang::CodeGen::CodeGenFunction::EmitLValue(clang::Expr const*) () #26407 0x0000000000abf635 in clang::CodeGen::CodeGenFunction::EmitCXXMemberOrOperatorMemberCallExpr(clang::CallExpr const*, clang::CXXMethodDecl const*, clang::CodeGen::ReturnValueSlot, bool, clang::NestedNameSpecifier*, bool, clang::Expr const*) () #26408 0x0000000000abfe63 in clang::CodeGen::CodeGenFunction::EmitCXXOperatorMemberCallExpr(clang::CXXOperatorCallExpr const*, clang::CXXMethodDecl const*, clang::CodeGen::ReturnValueSlot) () #26409 0x0000000000ab4d3f in clang::CodeGen::CodeGenFunction::EmitCallExpr(clang::CallExpr const*, clang::CodeGen::ReturnValueSlot) () #26410 0x00000000006959fa in (anonymous namespace)::ScalarExprEmitter::VisitCallExpr(clang::CallExpr const*) () #26411 0x0000000000ad7c0c in (anonymous namespace)::ScalarExprEmitter::Visit(clang::Expr*) () #26412 0x0000000000ad88c0 in clang::CodeGen::CodeGenFunction::EmitScalarExpr(clang::Expr const*, bool) () #26413 0x00000000009b4f44 in clang::CodeGen::CodeGenFunction::EmitReturnStmt(clang::ReturnStmt const&) () #26414 0x00000000009b68db in clang::CodeGen::CodeGenFunction::EmitStmt(clang::Stmt const*) () #26415 0x00000000009b6c0f in clang::CodeGen::CodeGenFunction::EmitCompoundStmtWithoutScope(clang::CompoundStmt const&, bool, clang::CodeGen::AggValueSlot) () #26416 0x00000000009d45d2 in clang::CodeGen::CodeGenFunction::EmitFunctionBody(clang::CodeGen::FunctionArgList&, clang::Stmt const*) () #26417 0x00000000009dab03 in clang::CodeGen::CodeGenFunction::GenerateCode(clang::GlobalDecl, llvm::Function*, clang::CodeGen::CGFunctionInfo const&) () #26418 0x00000000009eb321 in clang::CodeGen::CodeGenModule::EmitGlobalFunctionDefinition(clang::GlobalDecl, llvm::GlobalValue*) () #26419 0x00000000009f50f3 in clang::CodeGen::CodeGenModule::EmitGlobalDefinition(clang::GlobalDecl, llvm::GlobalValue*) () #26420 0x00000000009f5a80 in clang::CodeGen::CodeGenModule::EmitGlobal(clang::GlobalDecl) () #26421 0x00000000009f6410 in clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) [clone .part.3064] [clone .constprop.3087] () #26422 0x00000000009f672f in clang::CodeGen::CodeGenModule::EmitNamespace(clang::NamespaceDecl const*) () #26423 0x00000000009f626d in clang::CodeGen::CodeGenModule::EmitTopLevelDecl(clang::Decl*) [clone .part.3064] [clone .constprop.3087] () #26424 0x000000000097f3b3 in (anonymous namespace)::CodeGeneratorImpl::HandleTopLevelDecl(clang::DeclGroupRef) () #26425 0x000000000096c14c in clang::BackendConsumer::HandleTopLevelDecl(clang::DeclGroupRef) () #26426 0x0000000000b46396 in clang::ParseAST(clang::Sema&, bool, bool) () #26427 0x00000000007c87b6 in clang::FrontendAction::Execute() () #26428 0x000000000079f699 in clang::CompilerInstance::ExecuteAction(clang::FrontendAction&) () #26429 0x00000000007874e3 in clang::ExecuteCompilerInvocation(clang::CompilerInstance*) () #26430 0x0000000000781250 in cc1_main(llvm::ArrayRef<char const*>, char const*, void*) () #26431 0x0000000000752e12 in main () -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to llvm-toolchain-3.6 in Ubuntu. https://bugs.launchpad.net/bugs/1488254 Title: clang++ no longer ABI-compatible with g++ Status in LLVM: Confirmed Status in llvm-toolchain-3.6 package in Ubuntu: Confirmed Bug description: $ cat foo.cc #include <string> std::string hello = "Hello, world!\n"; $ cat bar.cc #include <string> #include <iostream> extern std::string hello; int main() { std::cout << hello; return 0; } $ g++ -c foo.cc && g++ foo.o bar.cc && ./a.out Hello, world! $ clang++ -c foo.cc && clang++ foo.o bar.cc && ./a.out Hello, world! $ g++ -c foo.cc && clang++ foo.o bar.cc && ./a.out /tmp/bar-34fb23.o: In function `main': bar.cc:(.text+0x14): undefined reference to `hello' clang: error: linker command failed with exit code 1 (use -v to see invocation) $ clang++ -c foo.cc && g++ foo.o bar.cc && ./a.out /tmp/ccqU38Mh.o: In function `main': bar.cc:(.text+0x5): undefined reference to `hello[abi:cxx11]' collect2: error: ld returned 1 exit status In practice, this means that many programs using C++ libraries other than libstdc++ fail to compile with clang++. For example, mosh fails with undefined references to google::protobuf::internal::empty_string_, google::protobuf::MessageLite::InitializationErrorString() const, and google::protobuf::MessageLite::SerializeAsString() const. To manage notifications about this bug go to: https://bugs.launchpad.net/llvm/+bug/1488254/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
