ninja: Entering directory `out/gn'
[0/1] Regenerating ninja files
[1/606] LINK ./bin/obj2yaml
[2/606] LINK ./bin/llvm-xray
[3/606] ACTION //llvm/tools/sancov:Opts(//llvm/utils/gn/build/toolchain:unix)
[4/605] LINK ./bin/sancov
[5/605] CXX obj/clang/lib/Basic/Basic.Attributes.o
FAILED: obj/clang/lib/Basic/Basic.Attributes.o 
../../chromeclang/bin/clang++ -MMD -MF obj/clang/lib/Basic/Basic.Attributes.o.d -o obj/clang/lib/Basic/Basic.Attributes.o -c ../../clang/lib/Basic/Attributes.cpp  -I../../clang/lib/Basic -I../../llvm/include -Igen/llvm/include -I../../clang/include -Igen/clang/include -Igen/clang/include/clang/Basic -Igen/llvm/include/llvm/Frontend/OpenMP -Igen/clang/lib/Basic -Igen/clang/include/clang/Sema -arch arm64 -isysroot ../../sysroot/MacOSX.sdk -mmacos-version-min=12 -mmacos-version-min=12 -O3 -fdiagnostics-color -Wall -Wextra -Wno-unused-parameter -Wdelete-non-virtual-dtor -Wstring-conversion -no-canonical-prefixes -Werror=date-time -isysroot ../../sysroot/MacOSX.sdk -Wpoison-system-directories -fPIC -Wcovered-switch-default -fno-strict-aliasing -std=c++17 -fvisibility-inlines-hidden -fno-exceptions -fno-rtti
../../clang/lib/Basic/Attributes.cpp:234:10: fatal error: 'clang/Basic/AttributeSpellingList.inc' file not found
#include "clang/Basic/AttributeSpellingList.inc"
         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.
[6/605] LINK ./bin/lld
[7/605] LINK obj/lld/unittests/AsLibAll/LLDAsLibAllTests
[8/605] LINK obj/lld/unittests/AsLibELF/LLDAsLibELFTests
[9/605] CXX obj/llvm/tools/sanstats/sanstats.sanstats.o
[10/605] CXX obj/llvm/tools/lto/lto.lto.o
[11/605] CXX obj/llvm/tools/opt/lib.optdriver.o
[12/605] CXX obj/llvm/tools/opt/lib.NewPMDriver.o
[13/605] CXX obj/bolt/lib/Core/Core.BinaryContext.o
[14/605] CXX obj/bolt/lib/Core/Core.BinaryFunction.o
ninja: build stopped: subcommand failed.
Command '['ninja', '-C', 'out/gn']' returned non-zero exit status 1.