Shared library build failing after 2025-11-20 nightly

[sarnex]

Describe the bug

2025-11-20 nightly passed here
2025-11-21 nightly failed here

2025-11-24T03:33:08.4657101Z FAILED: lib/libLLVMLTO.so.22.0git 
2025-11-24T03:33:08.4669535Z : && /usr/bin/g++ -fPIC -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-dangling-reference -Wno-redundant-move -Wno-pessimizing-move -Wno-array-bounds -Wno-stringop-overread -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -Wl,-z,defs -Wl,-z,nodelete   -Wl,-rpath-link,/__w/llvm/llvm/build/./lib  -Wl,--gc-sections -shared -Wl,-soname,libLLVMLTO.so.22.0git -o lib/libLLVMLTO.so.22.0git lib/LTO/CMakeFiles/LLVMLTO.dir/LTO.cpp.o lib/LTO/CMakeFiles/LLVMLTO.dir/LTOBackend.cpp.o lib/LTO/CMakeFiles/LLVMLTO.dir/LTOModule.cpp.o lib/LTO/CMakeFiles/LLVMLTO.dir/LTOCodeGenerator.cpp.o lib/LTO/CMakeFiles/LLVMLTO.dir/UpdateCompilerUsed.cpp.o lib/LTO/CMakeFiles/LLVMLTO.dir/ThinLTOCodeGenerator.cpp.o  -Wl,-rpath,"\$ORIGIN/../lib:/__w/llvm/llvm/build/lib:"  lib/libLLVMExtensions.so.22.0git  lib/libLLVMPasses.so.22.0git  lib/libLLVMSYCLLowerIR.so.22.0git  lib/libLLVMGenXIntrinsics.so.22.0git  lib/libLLVMCodeGen.so.22.0git  lib/libLLVMCGData.so.22.0git  lib/libLLVMObjCARCOpts.so.22.0git  lib/libLLVMCodeGenTypes.so.22.0git  lib/libLLVMTarget.so.22.0git  lib/libLLVMipo.so.22.0git  lib/libLLVMBitWriter.so.22.0git  lib/libLLVMInstrumentation.so.22.0git  lib/libLLVMLinker.so.22.0git  lib/libLLVMScalarOpts.so.22.0git  lib/libLLVMAggressiveInstCombine.so.22.0git  lib/libLLVMInstCombine.so.22.0git  lib/libLLVMTransformUtils.so.22.0git  lib/libLLVMAnalysis.so.22.0git  lib/libLLVMObject.so.22.0git  lib/libLLVMBitReader.so.22.0git  lib/libLLVMMC.so.22.0git  lib/libLLVMCore.so.22.0git  lib/libLLVMBinaryFormat.so.22.0git  lib/libLLVMRemarks.so.22.0git  lib/libLLVMTargetParser.so.22.0git  lib/libLLVMSupport.so.22.0git  -Wl,-rpath-link,/__w/llvm/llvm/build/lib && :
2025-11-24T03:33:08.4686056Z /usr/bin/ld: lib/LTO/CMakeFiles/LLVMLTO.dir/LTO.cpp.o: in function `(anonymous namespace)::InProcessThinBackend::start(unsigned int, llvm::BitcodeModule, llvm::FunctionImporter::ImportMapTy const&, llvm::DenseSet<llvm::ValueInfo, llvm::DenseMapInfo<llvm::ValueInfo, void> > const&, std::map<unsigned long, llvm::GlobalValue::LinkageTypes, std::less<unsigned long>, std::allocator<std::pair<unsigned long const, llvm::GlobalValue::LinkageTypes> > > const&, llvm::MapVector<llvm::StringRef, llvm::BitcodeModule, llvm::DenseMap<llvm::StringRef, unsigned int, llvm::DenseMapInfo<llvm::StringRef, void>, llvm::detail::DenseMapPair<llvm::StringRef, unsigned int> >, llvm::SmallVector<std::pair<llvm::StringRef, llvm::BitcodeModule>, 0u> >&)':
2025-11-24T03:33:08.4692735Z LTO.cpp:(.text._ZN12_GLOBAL__N_120InProcessThinBackend5startEjN4llvm13BitcodeModuleERKNS1_16FunctionImporter11ImportMapTyERKNS1_8DenseSetINS1_9ValueInfoENS1_12DenseMapInfoIS8_vEEEERKSt3mapImNS1_11GlobalValue12LinkageTypesESt4lessImESaISt4pairIKmSG_EEERNS1_9MapVectorINS1_9StringRefES2_NS1_8DenseMapISR_jNS9_ISR_vEENS1_6detail12DenseMapPairISR_jEEEENS1_11SmallVectorISJ_ISR_S2_ELj0EEEEE+0x38c): undefined reference to `llvm::StdThreadPool::asyncEnqueue(llvm::unique_function<void ()>, llvm::ThreadPoolTaskGroup*)'
2025-11-24T03:33:08.4695809Z collect2: error: ld returned 1 exit status

To reproduce

No response

Environment

• OS: [e.g Windows/Linux]
• Target device and vendor: [e.g. Intel GPU]
• DPC++ version: [e.g. commit hash or output of clang++ --version]
• Dependencies version: [e.g. the output of sycl-ls --verbose]

Additional context

No response