ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/377] AR lib/libLLVMAArch64Desc.a
[2/377] AR lib/libLLVMAArch64CodeGen.a
[3/377] 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'
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[7/377] LINK ./bin/llvm-objdump
[8/377] LINK ./bin/sancov
[9/377] LINK ./bin/llvm-nm
[10/377] LINK ./bin/llvm-debuginfo-analyzer
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[12/377] LINK ./bin/llvm-ml
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[14/377] LINK obj/llvm/unittests/tools/llvm-exegesis/RISCV/LLVMExegesisRISCVTests
[15/377] LINK obj/llvm/unittests/tools/llvm-exegesis/Mips/LLVMExegesisMipsTests
[16/377] LINK ./bin/llvm-libtool-darwin
[17/377] LINK ./bin/llvm-cfi-verify
[18/377] LINK obj/llvm/unittests/tools/llvm-exegesis/LLVMExegesisTests
[19/377] LINK obj/llvm/unittests/tools/llvm-exegesis/PowerPC/LLVMExegesisPowerPCTests
[20/377] LINK ./bin/llvm-bolt
[21/377] LINK ./bin/llvm-lipo
[22/377] LINK ./bin/llvm-jitlink
[23/377] LINK obj/llvm/unittests/tools/llvm-exegesis/X86/LLVMExegesisX86Tests
[24/377] LINK ./bin/llvm-bolt-heatmap
[25/377] LINK ./bin/clang-doc
[26/377] LINK obj/bolt/unittests/Passes/PassTests
[27/377] LINK ./bin/find-all-symbols
[28/377] LINK ./bin/clang-diff
[29/377] LINK ./bin/clang-reorder-fields
[30/377] LINK obj/clang/unittests/ASTMatchers/Dynamic/DynamicASTMatchersTests
[31/377] LINK ./bin/clang-include-fixer
[32/377] LINK obj/bolt/unittests/Core/CoreTests
[33/377] LINK ./bin/clang-refactor
[34/377] LINK obj/clang/unittests/Analysis/ClangAnalysisTests
[35/377] LINK obj/clang-tools-extra/unittests/clang-include-fixer/ClangIncludeFixerTests
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[37/377] LINK obj/clang-tools-extra/unittests/clang-change-namespace/ClangChangeNamespaceTests
[38/377] LINK obj/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/FindAllSymbolsTests
[39/377] LINK ./bin/clang-move
[40/377] LINK obj/clang/unittests/ASTMatchers/ASTMatchersTests
[41/377] LINK obj/clang/unittests/Sema/SemaTests
[42/377] LINK ./bin/clang-sycl-linker
[43/377] LINK ./bin/clang-change-namespace
[44/377] LINK ./bin/llvm-lto
[45/377] LINK obj/clang-tools-extra/unittests/clang-move/ClangMoveTests
[46/377] LINK obj/clang-tools-extra/unittests/clang-query/ClangQueryTests
[47/377] LINK obj/clang/unittests/AST/ASTTests
[48/377] LINK ./bin/clang-extdef-mapping
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[52/377] LINK ./bin/llvm-gsymutil
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[67/377] LINK ./bin/clang-repl
[68/377] LINK ./bin/lldb
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.