ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/373] AR lib/libLLVMBOLTTargetAArch64.a
[2/373] AR lib/libLLVMExegesisAArch64.a
[3/373] AR lib/libLLVMAArch64CodeGen.a
[4/373] AR lib/libLLVMAArch64AsmParser.a
[5/373] 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'
[6/373] LINK obj/llvm/unittests/tools/llvm-exegesis/LLVMExegesisTests
[7/373] LINK obj/llvm/unittests/tools/llvm-exegesis/Mips/LLVMExegesisMipsTests
[8/373] LINK ./bin/llvm-ml
[9/373] LINK ./bin/llvm-lipo
[10/373] LINK ./bin/llvm-libtool-darwin
[11/373] LINK ./bin/llvm-mc
[12/373] LINK ./bin/llvm-jitlink
[13/373] LINK obj/llvm/unittests/tools/llvm-exegesis/RISCV/LLVMExegesisRISCVTests
[14/373] LINK obj/bolt/unittests/Passes/PassTests
[15/373] LINK obj/llvm/unittests/tools/llvm-exegesis/X86/LLVMExegesisX86Tests
[16/373] LINK obj/llvm/unittests/Target/AArch64/AArch64Tests
[17/373] LINK obj/clang/unittests/DependencyScanning/ClangDependencyScanningTests
[18/373] LINK ./bin/clang-reorder-fields
[19/373] LINK obj/clang-tools-extra/unittests/clang-doc/ClangDocTests
[20/373] LINK ./bin/llvm-bolt-heatmap
[21/373] LINK obj/llvm/unittests/tools/llvm-exegesis/PowerPC/LLVMExegesisPowerPCTests
[22/373] LINK ./bin/modularize
[23/373] LINK obj/bolt/unittests/Core/CoreTests
[24/373] LINK ./bin/clang-include-fixer
[25/373] LINK ./bin/find-all-symbols
[26/373] LINK obj/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/FindAllSymbolsTests
[27/373] LINK obj/clang/unittests/ASTMatchers/Dynamic/DynamicASTMatchersTests
[28/373] LINK ./bin/clang-move
[29/373] LINK ./bin/llvm-dwp
[30/373] LINK obj/clang-tools-extra/unittests/clang-query/ClangQueryTests
[31/373] LINK ./bin/clang-change-namespace
[32/373] LINK obj/clang/unittests/Serialization/SerializationTests
[33/373] LINK ./bin/llvm-bolt
[34/373] LINK ./bin/clang-installapi
[35/373] LINK obj/clang/unittests/ASTMatchers/ASTMatchersTests
[36/373] LINK ./bin/dexp
[37/373] LINK obj/clang/unittests/Analysis/Scalable/ClangScalableAnalysisTests
[38/373] LINK ./bin/clang-doc
[39/373] LINK obj/clang-tools-extra/unittests/clang-change-namespace/ClangChangeNamespaceTests
[40/373] LINK obj/clang/unittests/CrossTU/CrossTUTests
[41/373] LINK ./bin/clang-diff
[42/373] LINK ./bin/llvm-gsymutil
[43/373] LINK obj/clang/unittests/AST/ASTTests
[44/373] LINK obj/clang-tools-extra/unittests/clang-include-fixer/ClangIncludeFixerTests
[45/373] LINK obj/clang/unittests/Analysis/ClangAnalysisTests
[46/373] LINK ./bin/clang-refactor
[47/373] LINK ./bin/llvm-lto
[48/373] LINK ./bin/llvm-lto2
[49/373] LINK ./bin/clang-query
[50/373] LINK obj/llvm/unittests/Target/TargetMachineCTests
[51/373] LINK obj/clang/unittests/Analysis/FlowSensitive/ClangAnalysisFlowSensitiveTests
[52/373] LINK ./bin/llvm-isel-fuzzer
[53/373] LINK ./bin/llvm-dwarfutil
[54/373] LINK ./bin/clang-linker-wrapper
[55/373] LINK ./bin/clang-sycl-linker
[56/373] LINK ./bin/clang-nvlink-wrapper
[57/373] LINK obj/clang-tools-extra/unittests/clang-move/ClangMoveTests
[58/373] LINK obj/clang/unittests/AST/ByteCode/InterpTests
[59/373] LINK ./bin/clangd-indexer
[60/373] LINK ./bin/clang-scan-deps
[61/373] LINK ./bin/pp-trace
[62/373] LINK ./bin/clangd
[63/373] LINK obj/clang-tools-extra/unittests/clang-tidy/ClangTidyTests
[64/373] LINK obj/clang/unittests/Frontend/FrontendTests
[65/373] LINK ./bin/clang-check
[66/373] SOLINK ./lib/libclang.so
[67/373] LINK obj/clang-tools-extra/clangd/unittests/ClangdTests
[68/373] LINK obj/clang/unittests/Driver/ClangDriverTests
[69/373] LINK ./bin/lldb
[70/373] LINK ./bin/clang-repl
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.