ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/372] AR lib/libLLVMX86CodeGen.a
[2/372] ACTION //llvm/tools/llvm-objdump:llvm-otool(//llvm/utils/gn/build/toolchain:unix)
[3/372] 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'
[4/372] LINK obj/clang/unittests/DependencyScanning/ClangDependencyScanningTests
[5/372] LINK ./bin/llvm-ml
[6/372] LINK ./bin/llvm-jitlink
[7/372] LINK ./bin/llvm-lipo
[8/372] LINK ./bin/llvm-libtool-darwin
[9/372] LINK obj/bolt/unittests/Core/CoreTests
[10/372] LINK ./bin/llvm-bolt
[11/372] LINK ./bin/clang-installapi
[12/372] LINK ./bin/lli
[13/372] LINK ./bin/find-all-symbols
[14/372] LINK obj/clang/unittests/ASTMatchers/Dynamic/DynamicASTMatchersTests
[15/372] LINK ./bin/clang-diff
[16/372] LINK obj/clang/unittests/Analysis/FlowSensitive/ClangAnalysisFlowSensitiveTests
[17/372] LINK obj/clang/unittests/Serialization/SerializationTests
[18/372] LINK obj/clang/unittests/AST/ByteCode/InterpTests
[19/372] LINK obj/clang/unittests/Sema/SemaTests
[20/372] LINK ./bin/clang-linker-wrapper
[21/372] LINK obj/clang/unittests/CrossTU/CrossTUTests
[22/372] LINK ./bin/clang-move
[23/372] LINK obj/clang-tools-extra/unittests/clang-doc/ClangDocTests
[24/372] LINK obj/clang/unittests/AST/ASTTests
[25/372] LINK obj/clang-tools-extra/unittests/clang-include-fixer/ClangIncludeFixerTests
[26/372] LINK obj/clang/unittests/Tooling/Syntax/SyntaxTests
[27/372] LINK ./bin/clang-extdef-mapping
[28/372] LINK ./bin/clang-sycl-linker
[29/372] LINK obj/clang/unittests/ASTMatchers/ASTMatchersTests
[30/372] LINK ./bin/llvm-bolt-heatmap
[31/372] LINK ./bin/llvm-isel-fuzzer
[32/372] LINK obj/bolt/unittests/Passes/PassTests
[33/372] LINK obj/clang/unittests/Index/IndexTests
[34/372] LINK obj/clang/unittests/Analysis/ClangAnalysisTests
[35/372] LINK ./bin/clang-nvlink-wrapper
[36/372] LINK obj/clang/unittests/Rewrite/RewriteTests
[37/372] LINK ./bin/llvm-lto2
[38/372] LINK obj/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/FindAllSymbolsTests
[39/372] LINK ./bin/lld
[40/372] LINK ./bin/dexp
[41/372] LINK ./bin/clang-doc
[42/372] LINK ./bin/clang-reorder-fields
[43/372] LINK obj/clang/unittests/StaticAnalyzer/StaticAnalysisTests
[44/372] LINK obj/clang-tools-extra/unittests/clang-move/ClangMoveTests
[45/372] LINK obj/clang-tools-extra/unittests/clang-change-namespace/ClangChangeNamespaceTests
[46/372] LINK ./bin/clang-refactor
[47/372] LINK ./bin/modularize
[48/372] LINK obj/clang-tools-extra/unittests/clang-query/ClangQueryTests
[49/372] LINK ./bin/clang-include-fixer
[50/372] LINK ./bin/llvm-lto
[51/372] LINK obj/lld/unittests/AsLibAll/LLDAsLibAllTests
[52/372] LINK ./bin/clangd-indexer
[53/372] LINK ./bin/pp-trace
[54/372] LINK ./bin/clang-change-namespace
[55/372] LINK ./bin/llvm-ir2vec
[56/372] LINK obj/clang-tools-extra/unittests/clang-tidy/ClangTidyTests
[57/372] LINK obj/clang/unittests/Analysis/Scalable/ClangScalableAnalysisTests
[58/372] LINK obj/lld/unittests/AsLibELF/LLDAsLibELFTests
[59/372] LINK ./bin/clang-query
[60/372] LINK obj/clang/unittests/Driver/ClangDriverTests
[61/372] LINK ./bin/dsymutil
[62/372] LINK ./bin/clang-check
[63/372] LINK ./bin/clang-tidy
[64/372] LINK ./bin/clangd
[65/372] SOLINK ./lib/libclang.so
[66/372] LINK obj/clang/unittests/Tooling/ToolingTests
[67/372] LINK obj/clang-tools-extra/clangd/unittests/ClangdTests
[68/372] CXX obj/clang/lib/CodeGen/CodeGen.CGExprCXX.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.