ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/446] AR lib/liblldbPluginSymbolFilePDB.a
[2/446] AR lib/libLLVMInstrumentation.a
[3/446] ACTION //llvm/tools/llvm-objdump:llvm-otool(//llvm/utils/gn/build/toolchain:unix)
[4/446] AR lib/libclangToolingDependencyScanning.a
[5/446] AR lib/libclangInterpreter.a
[6/446] AR lib/liblldbPluginExpressionParserClang.a
[7/446] 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'
[8/446] AR lib/libclangTooling.a
[9/446] LINK ./bin/llvm-link
[10/446] LINK ./bin/lli-child-target
[11/446] LINK obj/llvm/unittests/MC/X86/X86MCTests
[12/446] LINK obj/llvm/unittests/ExecutionEngine/ExecutionEngineTests
[13/446] LINK ./bin/llvm-profgen
[14/446] LINK ./bin/llvm-extract
[15/446] LINK obj/llvm/unittests/Frontend/LLVMFrontendTests
[16/446] LINK ./bin/lli
[17/446] LINK obj/llvm/unittests/Analysis/AnalysisTests
[18/446] LINK obj/llvm/unittests/ExecutionEngine/Orc/OrcJITTests
[19/446] LINK obj/llvm/unittests/ExecutionEngine/MCJIT/MCJITTests
[20/446] LINK obj/llvm/unittests/IR/IRTests
[21/446] LINK obj/clang/unittests/CodeGen/ClangCodeGenTests
[22/446] LINK ./bin/llvm-cxxmap
[23/446] LINK ./bin/clang-import-test
[24/446] LINK obj/llvm/unittests/CGData/CodeGenDataTests
[25/446] LINK ./bin/llvm-xray
[26/446] LINK obj/llvm/unittests/MC/AMDGPU/AMDGPUMCTests
[27/446] LINK ./bin/llvm-cxxdump
[28/446] LINK obj/llvm/unittests/DebugInfo/GSYM/DebugInfoGSYMTests
[29/446] LINK ./bin/llvm-mc
[30/446] LINK obj/clang/unittests/DependencyScanning/ClangDependencyScanningTests
[31/446] LINK obj/llvm/unittests/ExecutionEngine/JITLink/JITLinkTests
[32/446] LINK ./bin/llvm-lipo
[33/446] LINK ./bin/llvm-ml
[34/446] LINK ./bin/llvm-rtdyld
[35/446] LINK obj/llvm/unittests/MC/MCTests
[36/446] LINK ./bin/llvm-ar
[37/446] LINK ./bin/llvm-libtool-darwin
[38/446] LINK obj/llvm/unittests/Passes/PassBuilderBindings/PassesBindingsTests
[39/446] LINK ./bin/llvm-jitlink
[40/446] LINK obj/bolt/unittests/Core/CoreTests
[41/446] LINK ./bin/llvm-bolt
[42/446] LINK ./bin/llvm-exegesis
[43/446] LINK ./bin/llvm-bolt-heatmap
[44/446] LINK ./bin/llvm-dwp
[45/446] LINK obj/bolt/unittests/Passes/PassTests
[46/446] LINK ./bin/llvm-gsymutil
[47/446] LINK ./bin/lld
[48/446] LINK obj/lld/unittests/AsLibELF/LLDAsLibELFTests
[49/446] LINK ./bin/llvm-c-test
[50/446] LINK obj/llvm/unittests/CodeGen/CodeGenTests
[51/446] LINK ./bin/llc
[52/446] LINK ./bin/llvm-lto2
[53/446] LINK ./bin/llvm-split
[54/446] LINK ./bin/dsymutil
[55/446] LINK obj/llvm/unittests/CodeGen/GlobalISel/GlobalISelTests
[56/446] SOLINK ./lib/libLTO.so
[57/446] LINK ./bin/clang-linker-wrapper
[58/446] LINK obj/llvm/unittests/MI/MITests
[59/446] LINK obj/llvm/unittests/DebugInfo/DWARF/DebugInfoDWARFTests
[60/446] LINK ./bin/llvm-dwarfutil
[61/446] LINK ./bin/opt
[62/446] LINK ./bin/llvm-isel-fuzzer
[63/446] LINK ./bin/llvm-opt-fuzzer
[64/446] LINK obj/llvm/unittests/DebugInfo/LogicalView/DebugInfoLogicalViewTests
[65/446] LINK ./bin/clang-nvlink-wrapper
[66/446] LINK ./bin/llvm-lto
[67/446] LINK ./bin/llvm-reduce
[68/446] LINK ./bin/clang-sycl-linker
[69/446] LINK obj/lld/unittests/AsLibAll/LLDAsLibAllTests
[70/446] LINK ./bin/llvm-ir2vec
[71/446] LINK obj/clang/unittests/Driver/ClangDriverTests
[72/446] LINK obj/clang/unittests/Interpreter/ClangReplInterpreterTests
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.