INFO:2026-01-15T23:01:40Z:root:pulling...
From github.com:llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
   6ef80e147c63..88d3078e81ba  main       -> origin/main
Switched to branch 'main'
Your branch is behind 'origin/main' by 1 commit, and can be fast-forwarded.
  (use "git pull" to update your local branch)
HEAD is now at 88d3078e81ba [NFC] use UTC for LoopVectorize/tripcount.ll (#175095)
INFO:2026-01-15T23:01:43Z:root:syncing...
Deleted branch merge (was 6ef80e147c63).
Switched to a new branch 'merge'
branch 'merge' set up to track 'origin/main'.
INFO:2026-01-15T23:01:44Z:root:building
ninja: Entering directory `out/gn'
[1/4408] 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'
[2/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.OrcABISupport.o
[3/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.LoadLinkableFile.o
[4/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.JITTargetMachineBuilder.o
[5/4408] CXX obj/llvm/lib/Frontend/Offloading/Offloading.PropertySet.o
[6/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.InProcessMemoryAccess.o
[7/4408] CXX obj/llvm/lib/Frontend/Atomic/Atomic.Atomic.o
[8/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.TaskDispatch.o
[9/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.LookupAndRecordAddrs.o
[10/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.RedirectionManager.o
[11/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.riscv.o
[12/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.ppc64.o
[13/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.XCOFF.o
[14/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.ExecutorResolutionGenerator.o
[15/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.x86.o
[16/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.loongarch.o
[17/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.systemz.o
[18/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.ObjectTransformLayer.o
[19/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.IRTransformLayer.o
[20/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.IRCompileLayer.o
[21/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.SelfExecutorProcessControl.o
[22/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.x86_64.o
[23/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.LinkGraphLayer.o
[24/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.MachO.o
[25/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.ObjectLinkingLayer.o
[26/4408] CXX obj/llvm/lib/Frontend/Offloading/Offloading.OffloadWrapper.o
[27/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.ThreadSafeModule.o
[28/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.Mangling.o
[29/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.XCOFF_ppc64.o
[30/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.aarch64.o
[31/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.SectCreate.o
[32/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.JITLinkRedirectableSymbolManager.o
[33/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.aarch32.o
[34/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.BacktraceTools.o
[35/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.SimpleRemoteMemoryMapper.o
[36/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.UnwindInfoRegistrationPlugin.o
[37/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.ObjectFileInterface.o
[38/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.XCOFFLinkGraphBuilder.o
[39/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.MemoryMapper.o
[40/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.JITLinkMemoryManager.o
[41/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.MapperJITLinkMemoryManager.o
[42/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.Speculation.o
[43/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Debugging/Debugging.DebugInfoSupport.o
[44/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.RTDyldObjectLinkingLayer.o
[45/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.LazyObjectLinkingLayer.o
[46/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.Layer.o
[47/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Debugging/Debugging.DebuggerSupport.o
[48/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.MachOLinkGraphBuilder.o
[49/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.IRPartitionLayer.o
[50/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Debugging/Debugging.LLJITUtilsCBindings.o
[51/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.JITLinkReentryTrampolines.o
[52/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Debugging/Debugging.PerfSupportPlugin.o
[53/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.ReOptimizeLayer.o
[54/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Debugging/Debugging.VTuneSupportPlugin.o
[55/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.MachO_x86_64.o
[56/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Debugging/Debugging.DebuggerSupportPlugin.o
[57/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.LinkGraphLinkingLayer.o
[58/4408] CXX obj/llvm/lib/ExecutionEngine/JITLink/JITLink.MachO_arm64.o
[59/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.SimpleRemoteEPC.o
[60/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Debugging/Debugging.ELFDebugObjectPlugin.o
[61/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.OrcV2CBindings.o
[62/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.SpeculateAnalyses.o
[63/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.LazyReexports.o
[64/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.IndirectionUtils.o
[65/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.LLJIT.o
[66/4408] CXX obj/llvm/lib/ExecutionEngine/Orc/Orc.MachOPlatform.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.