ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/498] AR lib/libLLVMMC.a
[2/498] 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'
[3/498] LINK ./bin/llvm-sim
[4/498] LINK ./bin/llvm-modextract
[5/498] LINK ./bin/llvm-mca
[6/498] LINK ./bin/llvm-nm
[7/498] LINK ./bin/clang-apply-replacements
[8/498] LINK obj/clang-tools-extra/unittests/clang-apply-replacements/ClangApplyReplacementsTests
[9/498] LINK ./bin/llvm-bat-dump
[10/498] LINK ./bin/llvm-mc
[11/498] LINK ./bin/llvm-libtool-darwin
[12/498] LINK obj/bolt/unittests/Profile/ProfileTests
[13/498] LINK ./bin/llvm-lipo
[14/498] LINK ./bin/llvm-jitlink
[15/498] LINK obj/bolt/unittests/Core/CoreTests
[16/498] LINK ./bin/find-all-symbols
[17/498] LINK obj/bolt/unittests/Passes/PassTests
[18/498] LINK ./bin/clang-change-namespace
[19/498] LINK ./bin/clang-query
[20/498] LINK ./bin/clang-include-fixer
[21/498] LINK ./bin/clang-reorder-fields
[22/498] LINK obj/clang-tools-extra/unittests/clang-include-fixer/find-all-symbols/FindAllSymbolsTests
[23/498] LINK ./bin/clang-move
[24/498] LINK ./bin/llvm-bolt-heatmap
[25/498] LINK obj/clang-tools-extra/unittests/clang-include-fixer/ClangIncludeFixerTests
[26/498] LINK obj/clang-tools-extra/unittests/clang-move/ClangMoveTests
[27/498] LINK obj/clang-tools-extra/unittests/clang-change-namespace/ClangChangeNamespaceTests
[28/498] LINK obj/clang/unittests/ASTMatchers/Dynamic/DynamicASTMatchersTests
[29/498] LINK obj/clang-tools-extra/unittests/clang-query/ClangQueryTests
[30/498] LINK obj/clang/unittests/Analysis/ClangAnalysisTests
[31/498] LINK ./bin/dexp
[32/498] LINK ./bin/clang-extdef-mapping
[33/498] LINK ./bin/llvm-bolt
[34/498] LINK ./bin/pp-trace
[35/498] LINK ./bin/modularize
[36/498] LINK ./bin/clang-nvlink-wrapper
[37/498] LINK ./bin/llvm-isel-fuzzer
[38/498] LINK ./bin/clang-import-test
[39/498] LINK obj/clang-tools-extra/unittests/clang-tidy/ClangTidyTests
[40/498] LINK ./bin/llvm-lto2
[41/498] LINK ./bin/clang-tidy
[42/498] LINK ./bin/clangd
[43/498] LINK obj/clang-tools-extra/clangd/unittests/ClangdTests
[44/498] LINK ./bin/clangd-indexer
[45/498] CXX obj/clang-tools-extra/clang-doc/support/support.Utils.o
[46/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.HTMLGenerator.o
[47/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.MDMustacheGenerator.o
[48/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.Generators.o
[49/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.MDGenerator.o
[50/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.ClangDoc.o
[51/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.BitcodeWriter.o
[52/498] CXX obj/clang-tools-extra/clang-doc/tool/clang-doc.ClangDocMain.o
[53/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.JSONGenerator.o
[54/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.ClangDocTest.o
[55/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.GeneratorTest.o
[56/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.YAMLGenerator.o
[57/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.HTMLGeneratorTest.o
[58/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.Representation.o
[59/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.JSONGeneratorTest.o
[60/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.MergeTest.o
[61/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.MDGeneratorTest.o
[62/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.YAMLGeneratorTest.o
[63/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.BitcodeTest.o
[64/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.Serialize.o
[65/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.BitcodeReader.o
[66/498] CXX obj/clang-tools-extra/clang-doc/clang-doc.Mapper.o
[67/498] CXX obj/clang-tools-extra/unittests/clang-doc/ClangDocTests.SerializeTest.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.