ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/313] AR lib/libclangAST.a
[2/313] 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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[4/313] LINK obj/clang-tools-extra/unittests/clang-apply-replacements/ClangApplyReplacementsTests
[5/313] LINK ./bin/clang-apply-replacements
[6/313] LINK ./bin/clang-offload-bundler
[7/313] LINK obj/clang/unittests/Format/FormatTests
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[9/313] LINK obj/clang/unittests/Lex/LexTests
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[12/313] LINK ./bin/clang-change-namespace
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[17/313] LINK obj/clang/unittests/ASTMatchers/Dynamic/DynamicASTMatchersTests
[18/313] LINK ./bin/clang-move
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[23/313] LINK ./bin/clang-refactor
[24/313] LINK ./bin/clang-diff
[25/313] LINK obj/clang-tools-extra/unittests/clang-query/ClangQueryTests
[26/313] LINK ./bin/modularize
[27/313] LINK ./bin/clang-extdef-mapping
[28/313] LINK ./bin/clang-reorder-fields
[29/313] LINK ./bin/clang-query
[30/313] LINK ./bin/clang-include-fixer
[31/313] LINK ./bin/clang-scan-deps
[32/313] LINK ./bin/diagtool
[33/313] LINK obj/clang/unittests/Analysis/ClangAnalysisTests
[34/313] LINK obj/clang/unittests/CrossTU/CrossTUTests
[35/313] LINK obj/clang/unittests/ASTMatchers/ASTMatchersTests
[36/313] LINK obj/clang/unittests/StaticAnalyzer/StaticAnalysisTests
[37/313] LINK obj/clang/unittests/Index/IndexTests
[38/313] LINK ./bin/clang-installapi
[39/313] LINK obj/clang/unittests/Analysis/Scalable/ClangScalableAnalysisTests
[40/313] LINK obj/clang/unittests/Serialization/SerializationTests
[41/313] LINK ./bin/lldb-server
[42/313] LINK obj/clang/unittests/CodeGen/ClangCodeGenTests
[43/313] LINK obj/clang/unittests/Analysis/FlowSensitive/ClangAnalysisFlowSensitiveTests
[44/313] LINK obj/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/FindAllSymbolsTests
[45/313] LINK obj/clang-tools-extra/unittests/clang-include-fixer/ClangIncludeFixerTests
[46/313] LINK ./bin/clang-import-test
[47/313] LINK ./bin/dexp
[48/313] LINK obj/clang-tools-extra/unittests/clang-tidy/ClangTidyTests
[49/313] LINK obj/clang/unittests/Rewrite/RewriteTests
[50/313] LINK ./bin/clang-tidy
[51/313] LINK ./bin/clangd-indexer
[52/313] LINK ./bin/clangd
[53/313] SOLINK ./lib/libclang.so
[54/313] LINK obj/clang/unittests/AST/ASTTests
[55/313] LINK obj/clang/unittests/Tooling/Syntax/SyntaxTests
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[57/313] LINK ./bin/clang-check
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[61/313] LINK ./bin/clang-repl
[62/313] LINK obj/clang-tools-extra/clangd/unittests/ClangdTests
[63/313] LINK ./bin/lldb-test
[64/313] LINK obj/clang/unittests/Interpreter/ClangReplInterpreterTests
[65/313] LINK ./bin/lldb-dap
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.