INFO:2026-01-15T19:17:23Z:root:pulling...
From github.com:llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
   e81ab30bee60..404920838836  main       -> origin/main
Switched to branch 'main'
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HEAD is now at 404920838836 [CodeGen] Check BlockAddress users before marking block as taken (#174480)
INFO:2026-01-15T19:17:26Z:root:syncing...
Deleted branch merge (was e81ab30bee60).
Switched to a new branch 'merge'
branch 'merge' set up to track 'origin/main'.
INFO:2026-01-15T19:17:26Z:root:building
ninja: Entering directory `out/gn'
[1/6582] ACTION //llvm/utils/llvm-lit:llvm-lit(//llvm/utils/gn/build/toolchain:unix)
[2/6582] 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'
[3/6582] LINK obj/llvm/unittests/tools/llvm-profgen/LLVMProfgenTests
[4/6582] LINK obj/llvm/unittests/Telemetry/TelemetryTests
[5/6582] LINK obj/llvm/unittests/TextAPI/TextAPITests
[6/6582] LINK obj/llvm/unittests/XRay/XRayTests
[7/6582] LINK obj/llvm/unittests/tools/llvm-profdata/LLVMProfdataTests
[8/6582] CXX obj/llvm/utils/TableGen/Common/GlobalISel/Common.CodeExpander.o
[9/6582] CXX obj/llvm/utils/TableGen/Common/GlobalISel/Common.CXXPredicates.o
[10/6582] CXX obj/llvm/utils/TableGen/Common/GlobalISel/Common.CombinerUtils.o
[11/6582] CXX obj/llvm/utils/TableGen/Common/Common.OptEmitter.o
[12/6582] CXX obj/llvm/utils/TableGen/Common/Common.Utils.o
[13/6582] CXX obj/llvm/utils/TableGen/Common/Common.SubtargetFeatureInfo.o
[14/6582] CXX obj/llvm/utils/TableGen/Common/Common.PredicateExpander.o
[15/6582] CXX obj/llvm/utils/TableGen/llvm-tblgen.X86RecognizableInstr.o
[16/6582] CXX obj/llvm/utils/TableGen/Common/Common.InstructionEncoding.o
[17/6582] CXX obj/llvm/utils/TableGen/Common/GlobalISel/Common.PatternParser.o
[18/6582] CXX obj/llvm/utils/TableGen/Common/Common.InfoByHwMode.o
[19/6582] CXX obj/llvm/utils/TableGen/Common/Common.VarLenCodeEmitterGen.o
[20/6582] CXX obj/llvm/utils/TableGen/Common/GlobalISel/Common.Patterns.o
[21/6582] CXX obj/llvm/utils/TableGen/Common/GlobalISel/Common.GlobalISelMatchTableExecutorEmitter.o
[22/6582] CXX obj/llvm/utils/TableGen/Common/Common.CodeGenTarget.o
[23/6582] CXX obj/llvm/utils/TableGen/Common/GlobalISel/Common.GlobalISelMatchTable.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.