ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/394] AR lib/libLLVMVectorize.a
[2/394] ACTION //llvm/tools/llvm-objdump:llvm-otool(//llvm/utils/gn/build/toolchain:unix)
[3/394] 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'
[4/394] LINK ./bin/llvm-link
[5/394] LINK obj/clang/unittests/DependencyScanning/ClangDependencyScanningTests
[6/394] LINK ./bin/llvm-ml
[7/394] LINK ./bin/llvm-libtool-darwin
[8/394] LINK ./bin/llvm-lipo
[9/394] LINK obj/bolt/unittests/Passes/PassTests
[10/394] LINK ./bin/llvm-jitlink
[11/394] LINK obj/bolt/unittests/Core/CoreTests
[12/394] LINK obj/clang-tools-extra/unittests/clang-move/ClangMoveTests
[13/394] LINK obj/clang-tools-extra/unittests/clang-doc/ClangDocTests
[14/394] LINK ./bin/clang-change-namespace
[15/394] LINK ./bin/llvm-bolt
[16/394] LINK ./bin/find-all-symbols
[17/394] LINK obj/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/FindAllSymbolsTests
[18/394] LINK ./bin/llvm-bolt-heatmap
[19/394] LINK obj/clang/unittests/Sema/SemaTests
[20/394] LINK ./bin/clang-include-fixer
[21/394] LINK ./bin/clang-sycl-linker
[22/394] LINK obj/clang/unittests/Analysis/ClangAnalysisTests
[23/394] LINK obj/clang/unittests/ASTMatchers/Dynamic/DynamicASTMatchersTests
[24/394] LINK ./bin/clang-reorder-fields
[25/394] LINK ./bin/pp-trace
[26/394] LINK obj/clang-tools-extra/unittests/clang-query/ClangQueryTests
[27/394] LINK ./bin/clang-query
[28/394] LINK obj/clang-tools-extra/unittests/clang-change-namespace/ClangChangeNamespaceTests
[29/394] LINK ./bin/modularize
[30/394] LINK ./bin/clang-extdef-mapping
[31/394] LINK obj/clang-tools-extra/unittests/clang-include-fixer/ClangIncludeFixerTests
[32/394] LINK ./bin/clang-diff
[33/394] LINK obj/clang/unittests/Index/IndexTests
[34/394] LINK obj/clang/unittests/Analysis/FlowSensitive/ClangAnalysisFlowSensitiveTests
[35/394] LINK ./bin/clang-scan-deps
[36/394] LINK obj/clang/unittests/CodeGen/ClangCodeGenTests
[37/394] LINK ./bin/clang-nvlink-wrapper
[38/394] LINK ./bin/llvm-isel-fuzzer
[39/394] LINK ./bin/dexp
[40/394] LINK obj/clang/unittests/CrossTU/CrossTUTests
[41/394] LINK obj/clang/unittests/Rewrite/RewriteTests
[42/394] LINK ./bin/llvm-ir2vec
[43/394] LINK obj/clang/unittests/AST/ByteCode/InterpTests
[44/394] LINK ./bin/llvm-lto2
[45/394] LINK obj/clang/unittests/Serialization/SerializationTests
[46/394] LINK ./bin/clang-move
[47/394] LINK ./bin/llvm-gsymutil
[48/394] LINK ./bin/clang-import-test
[49/394] LINK obj/clang/unittests/AST/ASTTests
[50/394] LINK ./bin/clang-doc
[51/394] LINK obj/clang/unittests/ASTMatchers/ASTMatchersTests
[52/394] LINK ./bin/clang-installapi
[53/394] LINK ./bin/clang-refactor
[54/394] LINK obj/clang/unittests/Analysis/Scalable/ClangScalableAnalysisTests
[55/394] LINK ./bin/llvm-lto
[56/394] LINK obj/clang-tools-extra/unittests/clang-tidy/ClangTidyTests
[57/394] LINK ./bin/clang-tidy
[58/394] LINK ./bin/clang-linker-wrapper
[59/394] LINK ./bin/clangd-indexer
[60/394] LINK ./bin/clangd
[61/394] LINK obj/clang/unittests/Interpreter/ExceptionTests/ClangReplInterpreterExceptionTests
[62/394] LINK obj/clang/unittests/Driver/ClangDriverTests
[63/394] LINK ./bin/clang-check
[64/394] SOLINK ./lib/libclang.so
[65/394] LINK obj/clang/unittests/Frontend/FrontendTests
[66/394] LINK obj/clang/unittests/Interpreter/ClangReplInterpreterTests
[67/394] LINK obj/clang-tools-extra/clangd/unittests/ClangdTests
[68/394] LINK ./bin/clang-repl
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.