INFO:2026-01-15T21:41:26Z:root:pulling...
From github.com:llvm/llvm-project
 * branch                      main       -> FETCH_HEAD
   ac1334a23e61..2a9b30d22879  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 2a9b30d22879 [OpenMP][Offload] Add a buffer layer to debug messaging (#176153)
INFO:2026-01-15T21:41:28Z:root:syncing...
Deleted branch merge (was ac1334a23e61).
Switched to a new branch 'merge'
branch 'merge' set up to track 'origin/main'.
INFO:2026-01-15T21:41:29Z:root:building
ninja: Entering directory `out/gn'
[1/5173] LINK ./bin/clang-fuzzer-dictionary
[2/5173] LINK ./bin/llvm-config
[3/5173] 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'
[4/5173] LINK ./bin/lit-cpuid
[5/5173] LINK ./bin/llvm-jitlink-executor
[6/5173] LINK ./bin/apinotes-test
[7/5173] LINK obj/llvm/unittests/BinaryFormat/BinaryFormatTests
[8/5173] LINK obj/llvm/unittests/tools/llvm-profgen/LLVMProfgenTests
[9/5173] LINK obj/llvm/unittests/TextAPI/TextAPITests
[10/5173] LINK obj/llvm/unittests/TargetParser/TargetParserTests
[11/5173] ACTION //llvm/utils/llvm-lit:llvm-lit(//llvm/utils/gn/build/toolchain:unix)
[12/5173] LINK ./bin/clang-format
[13/5173] LINK obj/clang/unittests/Basic/BasicTests
[14/5173] LINK ./bin/llvm-tblgen
[15/5173] CXX obj/clang-tools-extra/clangd/support/support.Threading.o
[16/5173] CXX obj/llvm/unittests/Support/SupportTests.Threading.o
[17/5173] CXX obj/llvm/unittests/ADT/ADTTests.LazyAtomicPointerTest.o
[18/5173] CXX obj/llvm/unittests/Support/SupportTests.ThreadSafeAllocatorTest.o
[19/5173] CXX obj/llvm/unittests/Debuginfod/DebuginfodTests.HTTPServerTests.o
[20/5173] CXX obj/llvm/lib/IR/IR.RuntimeLibcalls.o
[21/5173] CXX obj/llvm/unittests/Support/SupportTests.ParallelTest.o
[22/5173] CXX obj/llvm/lib/Object/Object.IRSymtab.o
[23/5173] CXX obj/llvm/unittests/Support/SupportTests.JobserverTest.o
[24/5173] CXX obj/llvm/tools/llvm-cov/llvm-cov.CoverageReport.o
[25/5173] CXX obj/llvm/tools/llvm-cov/llvm-cov.SourceCoverageViewHTML.o
[26/5173] CXX obj/llvm/tools/llvm-cov/llvm-cov.CoverageExporterJson.o
[27/5173] CXX obj/llvm/lib/DebugInfo/GSYM/GSYM.DwarfTransformer.o
[28/5173] CXX obj/llvm/lib/Debuginfod/Debuginfod.Debuginfod.o
[29/5173] CXX obj/llvm/unittests/Support/SupportTests.ThreadPool.o
[30/5173] CXX obj/llvm/unittests/Support/SupportTests.VirtualOutputBackendsTest.o
[31/5173] CXX obj/llvm/lib/IR/IR.AutoUpgrade.o
[32/5173] CXX obj/llvm/tools/llvm-cov/llvm-cov.CodeCoverage.o
[33/5173] CXX obj/llvm/unittests/Object/ObjectTests.ELFObjectFileTest.o
[34/5173] CXX obj/bolt/tools/merge-fdata/merge-fdata.merge-fdata.o
[35/5173] CXX obj/llvm/tools/llvm-profdata/llvm-profdata.llvm-profdata.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.