ninja: Entering directory `out/gn'
[1/1] Regenerating ninja files
[1/2983] ACTION //libcxx/include:write_config_site(//llvm/utils/gn/build/toolchain:unix)
FAILED: include/c++/v1/__config_site 
python3 ../../llvm/utils/gn/build/write_cmake_config.py -o include/c++/v1/__config_site ../../libcxx/include/__config_site.in _LIBCPP_ABI_FORCE_ITANIUM= _LIBCPP_ABI_FORCE_MICROSOFT= _LIBCPP_EXTRA_SITE_DEFINES= _LIBCPP_HAS_NO_FILESYSTEM= _LIBCPP_HAS_NO_THREADS= _LIBCPP_HAS_NO_MONOTONIC_CLOCK= _LIBCPP_HAS_MUSL_LIBC= _LIBCPP_HAS_THREAD_API_PTHREAD= _LIBCPP_HAS_THREAD_API_EXTERNAL= _LIBCPP_HAS_THREAD_API_WIN32= _LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS= _LIBCPP_HAS_NO_VENDOR_AVAILABILITY_ANNOTATIONS=1 _LIBCPP_NO_VCRUNTIME= _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION= _LIBCPP_HAS_NO_RANDOM_DEVICE= _LIBCPP_HAS_NO_LOCALIZATION= _LIBCPP_HAS_NO_WIDE_CHARACTERS= _LIBCPP_HAS_NO_STD_MODULES= _LIBCPP_INSTRUMENTED_WITH_ASAN= _LIBCPP_ABI_DEFINES= _LIBCPP_HARDENING_MODE_DEFAULT=_LIBCPP_HARDENING_MODE_NONE _LIBCPP_PSTL_CPU_BACKEND_LIBDISPATCH= _LIBCPP_PSTL_CPU_BACKEND_SERIAL=1 _LIBCPP_PSTL_CPU_BACKEND_THREAD= _LIBCPP_ABI_VERSION= _LIBCPP_ABI_NAMESPACE=__1 _LIBCPP_HAS_NO_TIME_ZONE_DATABASE=
Traceback (most recent call last):
  File "/usr/local/google/home/thakis/src/llvm-project/out/gn/../../llvm/utils/gn/build/write_cmake_config.py", line 122, in <module>
    sys.exit(main())
             ^^^^^^
  File "/usr/local/google/home/thakis/src/llvm-project/out/gn/../../llvm/utils/gn/build/write_cmake_config.py", line 90, in main
    if not values[var]:
           ~~~~~~^^^^^
KeyError: '_LIBCPP_PSTL_BACKEND_SERIAL'
[2/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.LegalizeMutations.o
[3/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.InstructionSelector.o
[4/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.LostDebugLocObserver.o
[5/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.LegalityPredicates.o
[6/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.GISelChangeObserver.o
[7/2983] CXX obj/llvm/lib/CodeGen/CodeGen.AllocationOrder.o
[8/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.GIMatchTableExecutor.o
[9/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.LegacyLegalizerInfo.o
[10/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.LegalizerInfo.o
[11/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CSEInfo.o
[12/2983] CXX obj/llvm/lib/CodeGen/CodeGen.CFGuardLongjmp.o
[13/2983] CXX obj/llvm/lib/CodeGen/CodeGen.BreakFalseDeps.o
[14/2983] CXX obj/llvm/lib/CodeGen/CodeGen.CodeGenCommonISel.o
[15/2983] CXX obj/llvm/lib/CodeGen/CodeGen.CallingConvLower.o
[16/2983] CXX obj/llvm/lib/CodeGen/CodeGen.BasicBlockSectionsProfileReader.o
[17/2983] CXX obj/llvm/lib/CodeGen/CodeGen.BranchRelaxation.o
[18/2983] CXX obj/llvm/lib/CodeGen/CodeGen.BasicBlockPathCloning.o
[19/2983] CXX obj/llvm/lib/CodeGen/CodeGen.BasicBlockSections.o
[20/2983] CXX obj/llvm/lib/CodeGen/CodeGen.CriticalAntiDepBreaker.o
[21/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.ScheduleDAGVLIW.o
[22/2983] CXX obj/llvm/lib/CodeGen/CodeGen.CalcSpillWeights.o
[23/2983] CXX obj/llvm/lib/CodeGen/CodeGen.CFIFixup.o
[24/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.Combiner.o
[25/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelperVectorOps.o
[26/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.LegalizeTypesGeneric.o
[27/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.InlineAsmLowering.o
[28/2983] CXX obj/llvm/lib/CodeGen/CodeGen.CFIInstrInserter.o
[29/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.ResourcePriorityQueue.o
[30/2983] CXX obj/llvm/lib/CodeGen/CodeGen.DFAPacketizer.o
[31/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.Localizer.o
[32/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CSEMIRBuilder.o
[33/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.RegBankSelect.o
[34/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.LegalizeTypes.o
[35/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.ScheduleDAGFast.o
[36/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.MachineIRBuilder.o
[37/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.ScheduleDAGSDNodes.o
[38/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.GISelKnownBits.o
[39/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CallLowering.o
[40/2983] CXX obj/llvm/lib/CodeGen/CodeGen.BasicTargetTransformInfo.o
[41/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.LegalizeFloatTypes.o
[42/2983] CXX obj/llvm/lib/CodeGen/CodeGen.Analysis.o
[43/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.InstructionSelect.o
[44/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.LegalizeVectorOps.o
[45/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.ScheduleDAGRRList.o
[46/2983] CXX obj/llvm/lib/CodeGen/CodeGen.AtomicExpandPass.o
[47/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.InstrEmitter.o
[48/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.Utils.o
[49/2983] CXX obj/llvm/lib/DWARFLinker/Classic/Classic.DWARFStreamer.o
[50/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.FunctionLoweringInfo.o
[51/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.LoadStoreOpt.o
[52/2983] CXX obj/llvm/lib/CodeGen/CodeGen.BranchFolding.o
[53/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.Legalizer.o
[54/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.FastISel.o
[55/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.LegalizeDAG.o
[56/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.LegalizeIntegerTypes.o
[57/2983] CXX obj/llvm/lib/CodeGen/CodeGen.ComplexDeinterleavingPass.o
[58/2983] CXX obj/llvm/lib/CodeGen/MIRParser/MIRParser.MIParser.o
[59/2983] CXX obj/llvm/lib/CodeGen/MIRParser/MIRParser.MIRParser.o
[60/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.LegalizeVectorTypes.o
[61/2983] CXX obj/llvm/lib/DWARFLinker/Classic/Classic.DWARFLinker.o
[62/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.LegalizerHelper.o
[63/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.IRTranslator.o
[64/2983] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelper.o
[65/2983] CXX obj/llvm/lib/CodeGen/CodeGen.CodeGenPrepare.o
[66/2983] CXX obj/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.DAGCombiner.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.