ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/417] AR lib/liblldbPluginPlatformWindows.a
[2/417] AR lib/liblldbPluginObjCRuntime.a
[3/417] AR lib/liblldbPluginSymbolFileNativePDB.a
[4/417] AR lib/libLLVMVectorize.a
[5/417] ACTION //llvm/tools/llvm-objdump:llvm-otool(//llvm/utils/gn/build/toolchain:unix)
[6/417] AR lib/liblldbPluginSymbolFilePDB.a
[7/417] 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'
[8/417] LINK ./bin/llvm-ml
[9/417] LINK obj/clang/unittests/DependencyScanning/ClangDependencyScanningTests
[10/417] LINK ./bin/llvm-libtool-darwin
[11/417] LINK ./bin/llvm-lipo
[12/417] LINK ./bin/llvm-mc
[13/417] LINK obj/bolt/unittests/Passes/PassTests
[14/417] LINK obj/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/FindAllSymbolsTests
[15/417] LINK obj/clang/unittests/Analysis/ClangAnalysisTests
[16/417] LINK ./bin/clang-include-fixer
[17/417] LINK ./bin/clang-change-namespace
[18/417] LINK ./bin/dexp
[19/417] LINK ./bin/llvm-bolt
[20/417] LINK obj/clang-tools-extra/unittests/clang-include-fixer/ClangIncludeFixerTests
[21/417] LINK ./bin/clang-reorder-fields
[22/417] LINK ./bin/clang-scan-deps
[23/417] LINK obj/clang/unittests/AST/ByteCode/InterpTests
[24/417] LINK ./bin/clang-move
[25/417] LINK ./bin/llvm-jitlink
[26/417] LINK ./bin/clang-extdef-mapping
[27/417] LINK ./bin/clang-query
[28/417] LINK obj/bolt/unittests/Core/CoreTests
[29/417] LINK obj/clang-tools-extra/unittests/clang-doc/ClangDocTests
[30/417] LINK obj/clang-tools-extra/unittests/clang-move/ClangMoveTests
[31/417] LINK ./bin/clang-doc
[32/417] LINK ./bin/pp-trace
[33/417] LINK ./bin/modularize
[34/417] LINK obj/clang/unittests/Serialization/SerializationTests
[35/417] LINK ./bin/find-all-symbols
[36/417] LINK obj/clang-tools-extra/unittests/clang-change-namespace/ClangChangeNamespaceTests
[37/417] LINK ./bin/clang-nvlink-wrapper
[38/417] LINK ./bin/clang-installapi
[39/417] LINK ./bin/llvm-lto
[40/417] LINK ./bin/llvm-dwarfutil
[41/417] LINK ./bin/clang-linker-wrapper
[42/417] LINK obj/clang/unittests/ASTMatchers/ASTMatchersTests
[43/417] LINK obj/clang/unittests/Analysis/FlowSensitive/ClangAnalysisFlowSensitiveTests
[44/417] LINK obj/clang/unittests/ASTMatchers/Dynamic/DynamicASTMatchersTests
[45/417] LINK obj/clang-tools-extra/unittests/clang-query/ClangQueryTests
[46/417] LINK obj/clang-tools-extra/unittests/clang-tidy/ClangTidyTests
[47/417] LINK ./bin/clang-refactor
[48/417] LINK obj/clang/unittests/Index/IndexTests
[49/417] LINK obj/clang/unittests/Analysis/Scalable/ClangScalableAnalysisTests
[50/417] LINK obj/clang/unittests/CrossTU/CrossTUTests
[51/417] LINK ./bin/llvm-isel-fuzzer
[52/417] LINK ./bin/clangd
[53/417] LINK ./bin/clangd-indexer
[54/417] LINK obj/clang/unittests/Rewrite/RewriteTests
[55/417] LINK obj/clang/unittests/AST/ASTTests
[56/417] LINK ./bin/llvm-bolt-heatmap
[57/417] LINK ./bin/clang-diff
[58/417] LINK obj/clang/unittests/CodeGen/ClangCodeGenTests
[59/417] LINK ./bin/llvm-gsymutil
[60/417] LINK ./bin/llvm-lto2
[61/417] LINK ./bin/llvm-ir2vec
[62/417] LINK ./bin/clang-sycl-linker
[63/417] LINK obj/clang-tools-extra/clangd/unittests/ClangdTests
[64/417] LINK obj/clang/unittests/Frontend/FrontendTests
[65/417] LINK ./bin/clang-tidy
[66/417] LINK ./bin/clang-check
[67/417] LINK ./bin/clang-import-test
[68/417] LINK obj/clang/unittests/Interpreter/ClangReplInterpreterTests
[69/417] LINK obj/clang/unittests/Driver/ClangDriverTests
[70/417] SOLINK ./lib/libclang.so
[71/417] LINK ./bin/clang-repl
[72/417] CXX obj/lldb/tools/lldb-test/lldb-test.lldb-test.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.