ninja: Entering directory `out/gn'
[1/8459] CXX obj/llvm/lib/Support/Support.COM.o
[2/8459] CXX obj/llvm/lib/Support/Support.ExtensibleRTTI.o
[3/8459] 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_ABI_VERSION=1 _LIBCPP_ASSERTION_SEMANTIC_DEFAULT=_LIBCPP_ASSERTION_SEMANTIC_HARDENING_DEPENDENT _LIBCPP_EXTRA_SITE_DEFINES= _LIBCPP_HAS_FILESYSTEM=1 _LIBCPP_HAS_THREADS=1 _LIBCPP_HAS_MONOTONIC_CLOCK=1 _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_VENDOR_AVAILABILITY_ANNOTATIONS= _LIBCPP_NO_VCRUNTIME= _LIBCPP_TYPEINFO_COMPARISON_IMPLEMENTATION= _LIBCPP_HAS_RANDOM_DEVICE=1 _LIBCPP_HAS_LOCALIZATION=1 _LIBCPP_HAS_UNICODE=1 _LIBCPP_HAS_WIDE_CHARACTERS=1 _LIBCPP_HAS_TERMINAL=1 _LIBCPP_INSTRUMENTED_WITH_ASAN= _LIBCPP_ABI_DEFINES= _LIBCPP_HARDENING_MODE_DEFAULT=_LIBCPP_HARDENING_MODE_NONE _LIBCPP_LIBC_PICOLIBC= _LIBCPP_LIBC_NEWLIB= _LIBCPP_PSTL_BACKEND_LIBDISPATCH= _LIBCPP_PSTL_BACKEND_SERIAL= _LIBCPP_PSTL_BACKEND_STD_THREAD=1 _LIBCPP_ABI_NAMESPACE=__1 _LIBCPP_HAS_TIME_ZONE_DATABASE=1
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 75, in main
    if values[var] == "0":
       ~~~~~~^^^^^
KeyError: '_LIBCPP_LIBC_LLVM_LIBC'
[4/8459] CXX obj/llvm/lib/Support/Support.BuryPointer.o
[5/8459] CXX obj/llvm/lib/Support/Support.DivisionByConstantInfo.o
[6/8459] CXX obj/llvm/lib/Support/Support.DeltaTree.o
[7/8459] CXX obj/llvm/lib/Support/Support.ConvertUTF.o
[8/8459] CXX obj/llvm/lib/Support/Support.DXILABI.o
[9/8459] CXX obj/llvm/lib/Support/Support.AArch64BuildAttributes.o
[10/8459] CXX obj/llvm/lib/Support/Support.CrashRecoveryContext.o
[11/8459] CXX obj/llvm/lib/Support/Support.ConvertEBCDIC.o
[12/8459] CXX obj/llvm/lib/Support/Support.CSKYAttributes.o
[13/8459] CXX obj/llvm/lib/Support/Support.CRC.o
[14/8459] CXX obj/llvm/lib/Support/Support.AllocToken.o
[15/8459] CXX obj/llvm/lib/Support/Support.DJB.o
[16/8459] CXX obj/llvm/lib/Support/Support.Allocator.o
[17/8459] CXX obj/llvm/lib/Support/Support.DynamicAPInt.o
[18/8459] CXX obj/llvm/lib/Support/Support.ARMWinEH.o
[19/8459] CXX obj/llvm/lib/Support/Support.BlockFrequency.o
[20/8459] CXX obj/llvm/lib/TableGen/TableGen.TGTimer.o
[21/8459] CXX obj/llvm/lib/Support/Support.DeltaAlgorithm.o
[22/8459] CXX obj/llvm/lib/Support/Support.BinaryStreamError.o
[23/8459] CXX obj/llvm/lib/Support/Support.ConvertUTFWrapper.o
[24/8459] CXX obj/llvm/lib/Support/Support.AArch64AttributeParser.o
[25/8459] CXX obj/llvm/lib/Support/Support.Chrono.o
[26/8459] CXX obj/llvm/lib/Support/LSP/LSP.Logging.o
[27/8459] CXX obj/llvm/lib/Support/Support.FloatingPointMode.o
[28/8459] CXX obj/llvm/lib/Support/Support.ELFAttributes.o
[29/8459] CXX obj/llvm/lib/Support/Support.Compression.o
[30/8459] CXX obj/llvm/lib/Support/Support.BranchProbability.o
[31/8459] CXX obj/llvm/lib/Support/Support.Base64.o
[32/8459] CXX obj/llvm/lib/Support/Support.BinaryStreamRef.o
[33/8459] CXX obj/llvm/lib/Support/Support.BinaryStreamWriter.o
[34/8459] CXX obj/llvm/lib/TableGen/TableGen.StringMatcher.o
[35/8459] CXX obj/llvm/lib/Support/Support.ErrorHandling.o
[36/8459] CXX obj/llvm/lib/Support/Support.ExponentialBackoff.o
[37/8459] CXX obj/llvm/lib/Support/Support.CSKYAttributeParser.o
[38/8459] CXX obj/llvm/lib/Support/Support.Error.o
[39/8459] CXX obj/llvm/lib/TableGen/TableGen.StringToOffsetTable.o
[40/8459] CXX obj/llvm/lib/Support/Support.BinaryStreamReader.o
[41/8459] CXX obj/llvm/lib/Support/Support.DataExtractor.o
[42/8459] CXX obj/llvm/lib/Support/Support.Debug.o
[43/8459] CXX obj/llvm/lib/Support/Support.FileOutputBuffer.o
[44/8459] CXX obj/llvm/lib/Support/Support.CachePruning.o
[45/8459] CXX obj/llvm/lib/Support/Support.DAGDeltaAlgorithm.o
[46/8459] CXX obj/llvm/lib/TableGen/TableGen.TGLexer.o
[47/8459] CXX obj/llvm/lib/TableGen/TableGen.Error.o
[48/8459] CXX obj/llvm/lib/TableGen/TableGen.TableGenBackendSkeleton.o
[49/8459] CXX obj/llvm/lib/Support/Support.Caching.o
[50/8459] CXX obj/llvm/lib/Support/Support.AMDGPUMetadata.o
[51/8459] CXX obj/llvm/lib/Support/Support.FileUtilities.o
[52/8459] CXX obj/llvm/lib/Support/Support.DebugCounter.o
[53/8459] CXX obj/llvm/lib/Support/Support.FileCollector.o
[54/8459] CXX obj/llvm/lib/TableGen/TableGen.TableGenBackend.o
[55/8459] CXX obj/llvm/lib/Support/Support.CodeGenCoverage.o
[56/8459] CXX obj/llvm/lib/Support/Support.ELFAttrParserExtended.o
[57/8459] CXX obj/llvm/lib/Support/Support.ELFAttrParserCompact.o
[58/8459] CXX obj/llvm/lib/TableGen/TableGen.DetailedRecordsBackend.o
[59/8459] CXX obj/llvm/lib/TableGen/TableGen.Parser.o
[60/8459] CXX obj/llvm/lib/TableGen/TableGen.SetTheory.o
[61/8459] CXX obj/llvm/lib/Support/LSP/LSP.Transport.o
[62/8459] CXX obj/llvm/lib/TableGen/TableGen.JSONBackend.o
[63/8459] CXX obj/llvm/lib/TableGen/TableGen.Main.o
[64/8459] CXX obj/llvm/lib/Support/Support.BalancedPartitioning.o
[65/8459] CXX obj/llvm/lib/Support/LSP/LSP.Protocol.o
[66/8459] CXX obj/llvm/lib/Support/Support.CommandLine.o
[67/8459] CXX obj/llvm/lib/TableGen/TableGen.TGParser.o
[68/8459] CXX obj/llvm/lib/TableGen/TableGen.Record.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.