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   b501f666c5dc..1a1791b65d71  main       -> origin/main
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HEAD is now at 1a1791b65d71 [llvm/CAS] Introduce `validateObjectID()` and use it in `UnifiedOnDiskActionCache::validate()` (#176069)
INFO:2026-01-15T22:06:44Z:root:syncing...
Deleted branch merge (was b501f666c5dc).
Switched to a new branch 'merge'
branch 'merge' set up to track 'origin/main'.
INFO:2026-01-15T22:06:44Z:root:building
ninja: Entering directory `out/gn'
[1/4773] 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'
[2/4773] CXX obj/llvm/lib/CAS/CAS.BuiltinUnifiedCASDatabases.o
[3/4773] CXX obj/llvm/lib/CAS/CAS.BuiltinCAS.o
[4/4773] CXX obj/llvm/lib/CAS/CAS.OnDiskCAS.o
[5/4773] CXX obj/llvm/lib/CAS/CAS.OnDiskKeyValueDB.o
[6/4773] CXX obj/lldb/tools/lldb-server/lldb-server.LLDBServerUtilities.o
[7/4773] CXX obj/llvm/lib/CAS/CAS.ActionCaches.o
[8/4773] CXX obj/lldb/tools/lldb-server/lldb-server.lldb-server.o
[9/4773] CXX obj/lldb/tools/lldb-server/lldb-server.SystemInitializerLLGS.o
[10/4773] CXX obj/lldb/source/Target/Target.ThreadSpec.o
[11/4773] CXX obj/lldb/source/Target/Target.ThreadCollection.o
[12/4773] CXX obj/lldb/source/Target/Target.TraceCursor.o
[13/4773] CXX obj/lldb/source/Target/Target.TraceExporter.o
[14/4773] CXX obj/lldb/source/Target/Target.UnwindAssembly.o
[15/4773] CXX obj/llvm/lib/CAS/CAS.UnifiedOnDiskCache.o
[16/4773] CXX obj/lldb/source/Target/Target.UnixSignals.o
[17/4773] CXX obj/llvm/lib/CAS/CAS.OnDiskGraphDB.o
[18/4773] CXX obj/llvm/lib/Analysis/Analysis.CostModel.o
[19/4773] CXX obj/llvm/lib/Analysis/Analysis.AliasAnalysis.o
[20/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelperArtifacts.o
[21/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStepThrough.o
[22/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStepUntil.o
[23/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CSEMIRBuilder.o
[24/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStepInstruction.o
[25/4773] CXX obj/lldb/source/Target/Target.ThreadPlanCallOnFunctionExit.o
[26/4773] CXX obj/llvm/lib/Analysis/Analysis.InlineOrder.o
[27/4773] CXX obj/lldb/source/Target/Target.ThreadPlanBase.o
[28/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStack.o
[29/4773] CXX obj/lldb/source/Target/Target.ThreadPlanCallFunctionUsingABI.o
[30/4773] CXX obj/lldb/source/Target/Target.ThreadPlanRunToAddress.o
[31/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStepOverBreakpoint.o
[32/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelperVectorOps.o
[33/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.Combiner.o
[34/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStepOverRange.o
[35/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelperCompares.o
[36/4773] CXX obj/lldb/source/Target/Target.UnwindLLDB.o
[37/4773] CXX obj/lldb/source/Target/Target.ThreadPlan.o
[38/4773] CXX obj/lldb/source/Target/Target.ThreadPlanCallUserExpression.o
[39/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStepInRange.o
[40/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStepOut.o
[41/4773] CXX obj/lldb/source/Target/Target.ThreadPlanSingleThreadTimeout.o
[42/4773] CXX obj/lldb/source/Target/Target.ThreadPlanShouldStopHere.o
[43/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelperCasts.o
[44/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.InlineAsmLowering.o
[45/4773] CXX obj/lldb/source/Target/Target.ThreadPlanCallFunction.o
[46/4773] CXX obj/lldb/source/Target/Target.ThreadPlanStepRange.o
[47/4773] CXX obj/llvm/lib/Analysis/Analysis.GlobalsModRef.o
[48/4773] CXX obj/llvm/lib/Analysis/Analysis.InlineAdvisor.o
[49/4773] CXX obj/llvm/lib/Analysis/Analysis.ConstantFolding.o
[50/4773] CXX obj/lldb/source/Target/Target.ThreadPlanTracer.o
[51/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.InstructionSelect.o
[52/4773] CXX obj/lldb/source/Target/Target.Trace.o
[53/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.GISelValueTracking.o
[54/4773] CXX obj/llvm/lib/Analysis/Analysis.BranchProbabilityInfo.o
[55/4773] CXX obj/lldb/source/Target/Target.TraceDumper.o
[56/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CallLowering.o
[57/4773] CXX obj/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.WinException.o
[58/4773] CXX obj/llvm/lib/Analysis/Analysis.BasicAliasAnalysis.o
[59/4773] CXX obj/llvm/lib/CodeGen/CodeGen.AggressiveAntiDepBreaker.o
[60/4773] CXX obj/llvm/lib/Analysis/Analysis.CGSCCPassManager.o
[61/4773] CXX obj/llvm/lib/DTLTO/DTLTO.DTLTO.o
[62/4773] CXX obj/llvm/lib/Analysis/Analysis.InlineCost.o
[63/4773] CXX obj/lldb/source/Target/Target.Thread.o
[64/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.IRTranslator.o
[65/4773] CXX obj/llvm/lib/CodeGen/GlobalISel/GlobalISel.CombinerHelper.o
[66/4773] CXX obj/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.DwarfDebug.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.