ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/402] AR lib/libLLVMAsmPrinter.a
[2/402] ACTION //llvm/tools/llvm-objcopy:llvm-install-name-tool(//llvm/utils/gn/build/toolchain:unix)
[3/402] ACTION //llvm/tools/llvm-objcopy:llvm-bitcode-strip(//llvm/utils/gn/build/toolchain:unix)
[4/402] AR lib/libclangCodeGen.a
[5/402] ACTION //llvm/tools/llvm-objcopy:llvm-strip(//llvm/utils/gn/build/toolchain:unix)
[6/402] ACTION //llvm/tools/llvm-readobj:llvm-readelf(//llvm/utils/gn/build/toolchain:unix)
[7/402] ACTION //llvm/tools/llvm-rc:llvm-windres(//llvm/utils/gn/build/toolchain:unix)
[8/402] ACTION //llvm/tools/llvm-symbolizer:llvm-addr2line(//llvm/utils/gn/build/toolchain:unix)
[9/402] AR lib/libclangDoc.a
[10/402] 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'
[11/402] LINK ./bin/llvm-mca
[12/402] LINK ./bin/llvm-bat-dump
[13/402] LINK ./bin/llvm-mc
[14/402] LINK obj/bolt/unittests/Profile/ProfileTests
[15/402] LINK ./bin/llvm-libtool-darwin
[16/402] LINK ./bin/llvm-lipo
[17/402] LINK ./bin/llvm-jitlink
[18/402] LINK ./bin/llvm-bolt-heatmap
[19/402] LINK ./bin/clang-change-namespace
[20/402] LINK obj/clang/unittests/Sema/SemaTests
[21/402] LINK obj/clang/unittests/DependencyScanning/ClangDependencyScanningTests
[22/402] LINK obj/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/FindAllSymbolsTests
[23/402] LINK obj/clang/unittests/ASTMatchers/Dynamic/DynamicASTMatchersTests
[24/402] LINK ./bin/clang-refactor
[25/402] LINK ./bin/llvm-bolt
[26/402] LINK obj/bolt/unittests/Passes/PassTests
[27/402] LINK obj/clang/unittests/Index/IndexTests
[28/402] LINK ./bin/clang-include-fixer
[29/402] LINK ./bin/dexp
[30/402] LINK obj/clang-tools-extra/unittests/clang-include-fixer/ClangIncludeFixerTests
[31/402] LINK ./bin/clang-reorder-fields
[32/402] LINK obj/clang-tools-extra/unittests/clang-change-namespace/ClangChangeNamespaceTests
[33/402] LINK ./bin/clang-installapi
[34/402] LINK obj/clang-tools-extra/unittests/clang-move/ClangMoveTests
[35/402] LINK ./bin/pp-trace
[36/402] LINK obj/clang/unittests/StaticAnalyzer/StaticAnalysisTests
[37/402] LINK obj/bolt/unittests/Core/CoreTests
[38/402] LINK obj/clang-tools-extra/unittests/clang-query/ClangQueryTests
[39/402] LINK ./bin/clang-move
[40/402] LINK obj/clang/unittests/Analysis/ClangAnalysisTests
[41/402] LINK ./bin/clang-extdef-mapping
[42/402] LINK ./bin/llvm-isel-fuzzer
[43/402] LINK obj/clang/unittests/AST/ByteCode/InterpTests
[44/402] LINK ./bin/clang-scan-deps
[45/402] LINK ./bin/llvm-ir2vec
[46/402] LINK ./bin/clang-tidy
[47/402] LINK ./bin/modularize
[48/402] LINK obj/clang/unittests/Serialization/SerializationTests
[49/402] LINK obj/clang/unittests/Rewrite/RewriteTests
[50/402] LINK ./bin/clang-nvlink-wrapper
[51/402] LINK ./bin/llvm-lto
[52/402] LINK ./bin/clangd-indexer
[53/402] LINK obj/clang/unittests/Tooling/Syntax/SyntaxTests
[54/402] LINK ./bin/clang-query
[55/402] LINK ./bin/clang-linker-wrapper
[56/402] LINK ./bin/clang-doc
[57/402] LINK ./bin/clang-diff
[58/402] LINK obj/clang/unittests/CrossTU/CrossTUTests
[59/402] LINK ./bin/clang-sycl-linker
[60/402] LINK obj/clang/unittests/ASTMatchers/ASTMatchersTests
[61/402] LINK ./bin/llvm-lto2
[62/402] LINK obj/clang/unittests/CodeGen/ClangCodeGenTests
[63/402] LINK obj/clang/unittests/AST/ASTTests
[64/402] LINK ./bin/find-all-symbols
[65/402] LINK ./bin/clangd
[66/402] LINK ./bin/clang-import-test
[67/402] LINK obj/clang-tools-extra/unittests/clang-tidy/ClangTidyTests
[68/402] LINK obj/clang/unittests/Analysis/Scalable/ClangScalableAnalysisTests
[69/402] LINK obj/clang/unittests/Analysis/FlowSensitive/ClangAnalysisFlowSensitiveTests
[70/402] LINK obj/clang/unittests/Frontend/FrontendTests
[71/402] LINK obj/clang/unittests/Driver/ClangDriverTests
[72/402] SOLINK ./lib/libclang.so
[73/402] LINK obj/clang-tools-extra/clangd/unittests/ClangdTests
[74/402] LINK ./bin/clang-check
[75/402] LINK ./bin/clang-repl
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.