ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/433] 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'
[2/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXLowerUnreachable.o
[3/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXLowerAlloca.o
[4/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXAliasAnalysis.o
[5/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXProxyRegErasure.o
[6/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXForwardParams.o
[7/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXAtomicLower.o
[8/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXAssignValidGlobalNames.o
[9/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXTagInvariantLoads.o
[10/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXAllocaHoisting.o
[11/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXImageOptimizer.o
[12/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXMarkKernelPtrsGlobal.o
[13/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVVMIntrRange.o
[14/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVVMReflect.o
[15/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXCtorDtorLowering.o
[16/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXPrologEpilogPass.o
[17/433] CXX obj/llvm/lib/Target/NVPTX/MCTargetDesc/MCTargetDesc.NVPTXTargetStreamer.o
[18/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXLowerAggrCopies.o
[19/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXIRPeephole.o
[20/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXGenericToNVVM.o
[21/433] CXX obj/llvm/lib/Target/NVPTX/MCTargetDesc/MCTargetDesc.NVPTXMCTargetDesc.o
[22/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXPeephole.o
[23/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXFrameLowering.o
[24/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXSubtarget.o
[25/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXInstrInfo.o
[26/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXReplaceImageHandles.o
[27/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXRegisterInfo.o
[28/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXUtilities.o
[29/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXLowerArgs.o
[30/433] CXX obj/llvm/lib/Target/NVPTX/MCTargetDesc/MCTargetDesc.NVPTXInstPrinter.o
[31/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXISelDAGToDAG.o
[32/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXDwarfDebug.o
[33/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXAsmPrinter.o
[34/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXTargetTransformInfo.o
[35/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXTargetMachine.o
[36/433] CXX obj/llvm/lib/Target/NVPTX/LLVMNVPTXCodeGen.NVPTXISelLowering.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.