ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/2151] AR lib/libLLVMSelectionDAG.a
[2/2151] ACTION //clang/include/clang/AST:AbstractBasicReader(//llvm/utils/gn/build/toolchain:unix)
[3/2151] ACTION //clang/include/clang/AST:AbstractBasicWriter(//llvm/utils/gn/build/toolchain:unix)
[4/2151] ACTION //clang/include/clang/AST:AbstractTypeReader(//llvm/utils/gn/build/toolchain:unix)
[5/2151] ACTION //llvm/utils/llvm-lit:llvm-lit(//llvm/utils/gn/build/toolchain:unix)
FAILED: bin/llvm-lit 
python3 ../../llvm/utils/gn/build/write_cmake_config.py -o bin/llvm-lit ../../llvm/utils/llvm-lit/llvm-lit.in LLVM_SOURCE_DIR=../../../llvm Python3_EXECUTABLE=/usr/bin/env\ python3 BUILD_MODE=. LLVM_LIT_CONFIG_MAP=\#\ Takes\ a\ path\ that\'s\ relative\ to\ __file__\ and\ makes\ it\ absolute.\\ndef\ path\(p\):\\n\ \ \ \ return\ os.path.abspath\(os.path.join\(__file__,\ \'..\',\ p\)\)\ if\ p\ else\ \'\'\\n\\nmap_config\(\\n\ \ \ \ path\(r\'../../../bolt/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/bolt/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../bolt/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/bolt/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang-tools-extra/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang-tools-extra/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang-tools-extra/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang-tools-extra/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang-tools-extra/clangd/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang-tools-extra/clangd/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang-tools-extra/clangd/unittests/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang-tools-extra/clangd/unittests/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../clang/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/clang/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lld/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lld/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lld/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lld/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lldb/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lldb/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lldb/test/API/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lldb/test/API/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lldb/test/Shell/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lldb/test/Shell/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../lldb/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/lldb/test/Unit/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../llvm/test/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/llvm/test/lit.site.cfg.py\'\)\)\\nmap_config\(\\n\ \ \ \ path\(r\'../../../llvm/test/Unit/lit.cfg.py\'\),\\n\ \ \ \ path\(r\'../gen/llvm/test/Unit/lit.site.cfg.py\'\)\)
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 72, in main
    in_line = var_re.sub(repl, in_line)
  File "/usr/local/google/home/thakis/src/llvm-project/out/gn/../../llvm/utils/gn/build/write_cmake_config.py", line 70, in repl
    return values[key]
           ~~~~~~^^^^^
KeyError: 'LLVM_WINDOWS_PREFER_FORWARD_SLASH'
[6/2151] ACTION //clang/include/clang/AST:AbstractTypeWriter(//llvm/utils/gn/build/toolchain:unix)
[7/2151] LINK obj/llvm/unittests/MC/SystemZ/SystemZAsmLexerTests
[8/2151] LINK obj/llvm/unittests/MC/X86/X86MCTests
[9/2151] LINK ./bin/llvm-cxxdump
[10/2151] LINK ./bin/llvm-objdump
[11/2151] LINK ./bin/llvm-cxxmap
[12/2151] LINK obj/llvm/unittests/CGData/CodeGenDataTests
[13/2151] LINK ./bin/llvm-mca
[14/2151] LINK ./bin/sancov
[15/2151] LINK ./bin/llvm-cfi-verify
[16/2151] LINK ./bin/llvm-debuginfo-analyzer
[17/2151] LINK ./bin/llvm-mc
[18/2151] LINK ./bin/llvm-rtdyld
[19/2151] LINK ./bin/llvm-profgen
[20/2151] LINK obj/llvm/unittests/ExecutionEngine/JITLink/JITLinkTests
[21/2151] LINK ./bin/llvm-xray
[22/2151] LINK ./bin/llvm-ml
[23/2151] LINK ./bin/llvm-libtool-darwin
[24/2151] LINK ./bin/llvm-lipo
[25/2151] LINK obj/llvm/unittests/DebugInfo/GSYM/DebugInfoGSYMTests
[26/2151] LINK obj/llvm/unittests/Target/LoongArch/LoongArchTests
[27/2151] LINK obj/llvm/unittests/MC/MCTests
[28/2151] LINK obj/llvm/unittests/Target/ARM/ARMTests
[29/2151] LINK ./bin/lli
[30/2151] LINK ./bin/llvm-ar
[31/2151] LINK obj/llvm/unittests/ExecutionEngine/Orc/OrcJITTests
[32/2151] LINK obj/llvm/unittests/ExecutionEngine/MCJIT/MCJITTests
[33/2151] LINK obj/bolt/unittests/Core/CoreTests
[34/2151] LINK ./bin/llvm-jitlink
[35/2151] LINK ./bin/llvm-bolt
[36/2151] LINK obj/bolt/unittests/Passes/PassTests
[37/2151] LINK ./bin/llvm-exegesis
[38/2151] LINK ./bin/clang-linker-wrapper
[39/2151] LINK ./bin/llvm-bolt-heatmap
[40/2151] LINK obj/llvm/unittests/Passes/PassBuilderBindings/PassesBindingsTests
[41/2151] LINK obj/llvm/unittests/DebugInfo/LogicalView/DebugInfoLogicalViewTests
[42/2151] LINK ./bin/llvm-dwarfutil
[43/2151] LINK ./bin/llvm-isel-fuzzer
[44/2151] LINK obj/llvm/unittests/Target/AMDGPU/AMDGPUTests
[45/2151] LINK ./bin/llvm-ir2vec
[46/2151] LINK ./bin/llc
[47/2151] LINK obj/llvm/unittests/MC/AMDGPU/AMDGPUMCTests
[48/2151] SOLINK ./lib/libLTO.so
[49/2151] LINK ./bin/llvm-lto
[50/2151] LINK ./bin/lld
[51/2151] LINK obj/lld/unittests/AsLibAll/LLDAsLibAllTests
[52/2151] LINK ./bin/llvm-opt-fuzzer
[53/2151] LINK obj/llvm/unittests/MIR/MIRTests
[54/2151] LINK ./bin/clang-sycl-linker
[55/2151] LINK ./bin/llvm-dwp
[56/2151] LINK obj/llvm/unittests/CodeGen/CodeGenTests
[57/2151] LINK ./bin/llvm-c-test
[58/2151] LINK ./bin/llvm-gsymutil
[59/2151] LINK ./bin/opt
[60/2151] LINK ./bin/dsymutil
[61/2151] LINK obj/llvm/unittests/MI/MITests
[62/2151] LINK ./bin/llvm-split
[63/2151] LINK ./bin/clang-nvlink-wrapper
[64/2151] LINK ./bin/llvm-reduce
[65/2151] LINK obj/lld/unittests/AsLibELF/LLDAsLibELFTests
[66/2151] LINK ./bin/llvm-lto2
[67/2151] LINK obj/llvm/unittests/DebugInfo/DWARF/DebugInfoDWARFTests
[68/2151] LINK obj/llvm/unittests/CodeGen/GlobalISel/GlobalISelTests
[69/2151] CXX obj/clang-tools-extra/clang-doc/support/support.Utils.o
[70/2151] CXX obj/clang/lib/Testing/Testing.TestAST.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.