ninja: Entering directory `out/gn'
[1/1] Regenerating ninja files
[1/2853] 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'
[2/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineFunctionPrinterPass.o
[3/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PHIEliminationUtils.o
[4/2853] CXX obj/llvm/lib/CodeGen/CodeGen.OptimizePHIs.o
[5/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineOptimizationRemarkEmitter.o
[6/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineSSAContext.o
[7/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RDFRegisters.o
[8/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PseudoSourceValue.o
[9/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PatchableFunction.o
[10/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PostRAHazardRecognizer.o
[11/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineSizeOpts.o
[12/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineLoopUtils.o
[13/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineStableHash.o
[14/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineFrameInfo.o
[15/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineModuleSlotTracker.o
[16/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RegAllocScore.o
[17/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineStripDebug.o
[18/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PseudoProbeInserter.o
[19/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineDominanceFrontier.o
[20/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RegAllocEvictionAdvisor.o
[21/2853] CXX obj/llvm/lib/CodeGen/CodeGen.ProcessImplicitDefs.o
[22/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineSSAUpdater.o
[23/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineInstrBundle.o
[24/2853] CXX obj/llvm/lib/CodeGen/CodeGen.ReachingDefAnalysis.o
[25/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MacroFusion.o
[26/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineLateInstrsCleanup.o
[27/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineCheckDebugify.o
[28/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RegAllocBasic.o
[29/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RegAllocPriorityAdvisor.o
[30/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RegAllocBase.o
[31/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineRegisterInfo.o
[32/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineFunctionSplitter.o
[33/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachinePassManager.o
[34/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineModuleInfo.o
[35/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineCombiner.o
[36/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PostRASchedulerList.o
[37/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineTraceMetrics.o
[38/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineFunctionPass.o
[39/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineUniformityAnalysis.o
[40/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineCycleAnalysis.o
[41/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineConvergenceVerifier.o
[42/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineDebugify.o
[43/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineOperand.o
[44/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PeepholeOptimizer.o
[45/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineLoopInfo.o
[46/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PreISelIntrinsicLowering.o
[47/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RegAllocFast.o
[48/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineCopyPropagation.o
[49/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineRegionInfo.o
[50/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachinePostDominators.o
[51/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineDominators.o
[52/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PHIElimination.o
[53/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RDFGraph.o
[54/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineInstr.o
[55/2853] CXX obj/llvm/lib/CodeGen/CodeGen.PrologEpilogInserter.o
[56/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineFunction.o
[57/2853] CXX obj/llvm/lib/CodeGen/CodeGen.ModuloSchedule.o
[58/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RDFLiveness.o
[59/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineLICM.o
[60/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineOutliner.o
[61/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RegAllocPBQP.o
[62/2853] CXX obj/llvm/lib/CodeGen/CodeGen.RegAllocGreedy.o
[63/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineSink.o
[64/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineScheduler.o
[65/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachineVerifier.o
[66/2853] CXX obj/llvm/lib/CodeGen/CodeGen.MachinePipeliner.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.