Dear Sir, Hi, I tried to compile my source code using gcc-linaro-aarch64-linux-gnu-4.8-2013.09-01_linux(gcc 4.8.2) the error occurred like below ../compiler/llvm-mali/lib/Target/Bifrost/BifrostInstrInfo.h:56:47: error: use of deleted function ‘llvm::MachineInstr::MachineInstr(const llvm::MachineInstr&)’ PipeInfoTy(const MachineInstr &mi) : MI{mi} {} ^ In file included from ../compiler/llvm-mali/lib/Target/Bifrost/MCTargetDesc/BifrostMCInstOpdMap.h:18:0, from ../compiler/llvm-mali/lib/Target/Bifrost/MCTargetDesc/BifrostMCInst.h:14, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostRegisterInfo.h:12, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostFrameLowering.h:13, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostSubtarget.h:12, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostISelDAGToDAG.h:13, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostISelDAGToDAG.cpp:11: ../compiler/llvm/llvm/include/llvm/CodeGen/MachineInstr.h:276:3: error: declared here MachineInstr(const MachineInstr &) = delete; ^ In file included from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostSubtarget.h:14:0, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostISelDAGToDAG.h:13, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostISelDAGToDAG.cpp:11: ../compiler/llvm-mali/lib/Target/Bifrost/BifrostInstrInfo.h:56:47: error: use of deleted function ‘llvm::MachineInstr::~MachineInstr()’ PipeInfoTy(const MachineInstr &mi) : MI{mi} {} ^ In file included from ../compiler/llvm-mali/lib/Target/Bifrost/MCTargetDesc/BifrostMCInstOpdMap.h:18:0, from ../compiler/llvm-mali/lib/Target/Bifrost/MCTargetDesc/BifrostMCInst.h:14, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostRegisterInfo.h:12, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostFrameLowering.h:13, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostSubtarget.h:12, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostISelDAGToDAG.h:13, from ../compiler/llvm-mali/lib/Target/Bifrost/BifrostISelDAGToDAG.cpp:11: ../compiler/llvm/llvm/include/llvm/CodeGen/MachineInstr.h:279:3: error: declared here ~MachineInstr() = delete; Here, I attach the code that i simply reconstructed for the private of the real code Please refer to below code for understanding error log (Assume AAA to MachineInstr / ZZZ to PipeInfoTy) #include <iostream> using namespace std; class AAA { public: AAA(const AAA &) = delete; AAA &operator=(const AAA &) = delete; ~AAA() = delete; }; class ZZZ { const AAA &ca; public: ZZZ (const AAA &aaa) : ca{aaa} {} }; int main() { } I was looking for the solution and eventually changed the toolchain to gcc-linaro-4.9-2016.02-x86_64_aarch64-linux-gnu(gcc4.9.4) and I tried again. build was success. Build was successful and I read the gcc release note and compile option for checking cause But i don't know what the difference is. I want to know cause clearly. Could you explain the difference? or let me know the solution this issue in gcc4.8(ex compile option... etc)