Linking fail when build instrumented clang

[hrtan99]

I'm trying to build an instrumented clang according to the doc.

Build command I use:

cmake -S llvm -B build_instr -G Ninja \
-DLLVM_TARGETS_TO_BUILD=host \
-DLLVM_ENABLE_PROJECTS='clang' \
-DLLVM_BUILD_INSTRUMENTED=IR \
-DLLVM_BUILD_RUNTIME=No \
-DLLVM_USE_LINKER=mold \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_C_COMPILER=/home/tanhuiri/projects/llvm-project/build_dev/bin/clang \
-DCMAKE_CXX_COMPILER=/home/tanhuiri/projects/llvm-project/build_dev/bin/clang++ \
-DCMAKE_C_FLAGS='-O2 -fprofile-generate=clang_instr/ -fno-inline' \
-DCMAKE_CXX_FLAGS='-O2 -fprofile-generate=clang_instr/ -fno-inline'

The linking was failed:

[3450/3980] Linking CXX executable bin/bugpoint
FAILED: bin/bugpoint
: && /home/tanhuiri/projects/llvm-project/build_dev/bin/clang++ -O2 -fprofile-generate=clang_instr/ -fno-inline -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -fprofile-generate="/home/tanhuiri/projects/llvm-project/build_instr/profiles" -O3 -DNDEBUG -fuse-ld=mold -Wl,--color-diagnostics -fprofile-generate="/home/tanhuiri/projects/llvm-project/build_instr/profiles"   -Wl,--export-dynamic tools/bugpoint/CMakeFiles/bugpoint.dir/BugDriver.cpp.o tools/bugpoint/CMakeFiles/bugpoint.dir/CrashDebugger.cpp.o tools/bugpoint/CMakeFiles/bugpoint.dir/ExecutionDriver.cpp.o tools/bugpoint/CMakeFiles/bugpoint.dir/ExtractFunction.cpp.o tools/bugpoint/CMakeFiles/bugpoint.dir/FindBugs.cpp.o tools/bugpoint/CMakeFiles/bugpoint.dir/Miscompilation.cpp.o tools/bugpoint/CMakeFiles/bugpoint.dir/OptimizerDriver.cpp.o tools/bugpoint/CMakeFiles/bugpoint.dir/ToolRunner.cpp.o tools/bugpoint/CMakeFiles/bugpoint.dir/bugpoint.cpp.o -o bin/bugpoint  -Wl,-rpath,"\$ORIGIN/../lib:"  lib/libLLVMX86AsmParser.a  lib/libLLVMX86CodeGen.a  lib/libLLVMX86Desc.a  lib/libLLVMX86Info.a  lib/libLLVMAnalysis.a  lib/libLLVMBitWriter.a  lib/libLLVMCodeGen.a  lib/libLLVMExtensions.a  lib/libLLVMCore.a  lib/libLLVMipo.a  lib/libLLVMIRReader.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMInstrumentation.a  lib/libLLVMLinker.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMScalarOpts.a  lib/libLLVMSupport.a  lib/libLLVMTarget.a  lib/libLLVMTargetParser.a  lib/libLLVMTransformUtils.a  lib/libLLVMVectorize.a  lib/libLLVMMCDisassembler.a  lib/libLLVMAsmPrinter.a  lib/libLLVMCFGuard.a  lib/libLLVMGlobalISel.a  lib/libLLVMIRPrinter.a  lib/libLLVMSelectionDAG.a  lib/libLLVMCodeGen.a  lib/libLLVMObjCARCOpts.a  lib/libLLVMCGData.a  lib/libLLVMTarget.a  lib/libLLVMCodeGenTypes.a  lib/libLLVMBitWriter.a  lib/libLLVMSandboxIR.a  lib/libLLVMFrontendOpenMP.a  lib/libLLVMScalarOpts.a  lib/libLLVMAggressiveInstCombine.a  lib/libLLVMInstCombine.a  lib/libLLVMFrontendOffloading.a  lib/libLLVMTransformUtils.a  lib/libLLVMAnalysis.a  lib/libLLVMProfileData.a  lib/libLLVMSymbolize.a  lib/libLLVMDebugInfoDWARF.a  lib/libLLVMDebugInfoPDB.a  lib/libLLVMDebugInfoCodeView.a  lib/libLLVMDebugInfoMSF.a  lib/libLLVMDebugInfoBTF.a  lib/libLLVMProfileInference.a  lib/libLLVMObject.a  lib/libLLVMIRReader.a  lib/libLLVMAsmParser.a  lib/libLLVMMCParser.a  lib/libLLVMMC.a  lib/libLLVMBitReader.a  lib/libLLVMCore.a  lib/libLLVMRemarks.a  lib/libLLVMBitstreamReader.a  lib/libLLVMTextAPI.a  lib/libLLVMBinaryFormat.a  lib/libLLVMTargetParser.a  lib/libLLVMSupport.a  lib/libLLVMDemangle.a  -lrt  -ldl  -lm  /usr/lib/x86_64-linux-gnu/libz.so  /usr/lib/x86_64-linux-gnu/libzstd.so && :
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::block_begin() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCodeGen.a(MachineCycleAnalysis.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::MachineFunction> >::getParentCycle() [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::block_end() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCodeGen.a(MachineCycleAnalysis.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::MachineFunction> >::print(llvm::GenericSSAContext<llvm::MachineFunction> const&) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycleInfo<llvm::GenericSSAContext<llvm::Function> >::getFunction() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCodeGen.a(MachineCycleAnalysis.cpp.o):(__llvm_prf_data): llvm::GenericCycleInfo<llvm::GenericSSAContext<llvm::MachineFunction> >::print(llvm::GenericCycle<llvm::GenericSSAContext<llvm::MachineFunction> > const*) [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCodeGen.a(MachineCycleAnalysis.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::MachineFunction> >::isReducible() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycleInfo<llvm::GenericSSAContext<llvm::Function> >::getSSAContext() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::getDepth() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::getParentCycle() [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCodeGen.a(MachineCycleAnalysis.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::MachineFunction> >::getHeader() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::print(llvm::GenericSSAContext<llvm::Function> const&) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycleInfo<llvm::GenericSSAContext<llvm::Function> >::print(llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> > const*) [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCodeGen.a(MachineCycleAnalysis.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::MachineFunction> >::isEntry(llvm::MachineBasicBlock const*) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::isReducible() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::getHeader() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::isEntry(llvm::BasicBlock const*) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCodeGen.a(MachineCycleAnalysis.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::MachineFunction> >::contains(llvm::MachineBasicBlock const*) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::contains(llvm::BasicBlock const*) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCodeGen.a(MachineCycleAnalysis.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::MachineFunction> >::printEntries(llvm::GenericSSAContext<llvm::MachineFunction> const&) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::getParentCycle() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::blocks() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(CycleInfo.cpp.o):(__llvm_prf_data): llvm::GenericCycle<llvm::GenericSSAContext<llvm::Function> >::printEntries(llvm::GenericSSAContext<llvm::Function> const&) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(DebugProgramInstruction.cpp.o):(__llvm_prf_data): llvm::DbgRecordParamRef<llvm::DIExpression>::getAsMDNode() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(DebugProgramInstruction.cpp.o):(__llvm_prf_data): llvm::DbgRecordParamRef<llvm::DIExpression>::operator==(llvm::DbgRecordParamRef<llvm::DIExpression> const&) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(DebugProgramInstruction.cpp.o):(__llvm_prf_data): llvm::DbgRecordParamRef<llvm::DILabel>::getAsMDNode() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(DebugProgramInstruction.cpp.o):(__llvm_prf_data): llvm::DbgRecordParamRef<llvm::DILocalVariable>::getAsMDNode() const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation
mold: error: lib/libLLVMCore.a(DebugProgramInstruction.cpp.o):(__llvm_prf_data): llvm::DbgRecordParamRef<llvm::DILocalVariable>::operator==(llvm::DbgRecordParamRef<llvm::DILocalVariable> const&) const [clone .local] refers to a discarded COMDAT section probably due to an ODR violation

[rui314]

What is the version of /home/tanhuiri/projects/llvm-project/build_dev/bin/clang++? Does this happen with a release version of LLVM?

[hrtan99]

I'm using LLVM 20 with commit b83399eab603320d3c2998450f4ada83e7fe746c.

First, I build a clang using gcc with compiler-rt enabled in release mode, and then I try to use this clang to build an instrumented clang using same source tree in release mode, then the link error occurred.

With the default lld, there is no such error.