[www-scripts] Sphinx Doc Update: ERROR

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/opt/tools/sphinx_update.sh: warning: removing stale lock file from PID 24120.
UPDATING llvm SOURCES
Updating '.':
U    utils/gn/secondary/llvm/unittests/IR/BUILD.gn
D    lib/Target/X86/ShadowCallStack.cpp
D    test/CodeGen/X86/shadow-call-stack.mir
U    include/llvm/Support/GenericDomTreeConstruction.h
U    include/llvm/Transforms/Utils/BuildLibCalls.h
U    docs/ReleaseNotes.rst
U    utils/gn/gn.py
U    utils/gn/secondary/llvm/lib/Target/X86/BUILD.gn
U    utils/gn/secondary/compiler-rt/test/BUILD.gn
U    tools/llvm-mca/Views/SummaryView.cpp
U    tools/llvm-mca/Views/SummaryView.h
U    tools/llvm-mca/llvm-mca.cpp
U    lib/Transforms/Utils/BuildLibCalls.cpp
U    lib/Transforms/Utils/SimplifyLibCalls.cpp
U    lib/CodeGen/UnreachableBlockElim.cpp
U    lib/IR/AutoUpgrade.cpp
U    lib/Analysis/TargetLibraryInfo.cpp
U    lib/Target/AMDGPU/VOP1Instructions.td
U    lib/Target/AMDGPU/MCTargetDesc/AMDGPUTargetStreamer.cpp
U    lib/Target/PowerPC/PPCISelDAGToDAG.cpp
U    lib/Target/X86/X86.h
U    lib/Target/X86/X86SchedHaswell.td
U    lib/Target/X86/X86SchedSkylakeClient.td
U    lib/Target/X86/X86TargetTransformInfo.cpp
U    lib/Target/X86/X86SchedSkylakeServer.td
U    lib/Target/X86/CMakeLists.txt
U    lib/Target/X86/X86TargetMachine.cpp
U    lib/Target/X86/X86SchedBroadwell.td
U    runtimes/CMakeLists.txt
U    test/CodeGen/AMDGPU/cvt_f32_ubyte.ll
U    test/CodeGen/AMDGPU/udivrem24.ll
U    test/CodeGen/AMDGPU/code-object-v3.ll
U    test/CodeGen/X86/O0-pipeline.ll
U    test/CodeGen/X86/avx512-masked_memop-16-8.ll
U    test/CodeGen/X86/extractelement-fp.ll
U    test/CodeGen/X86/memcmp.ll
U    test/CodeGen/X86/O3-pipeline.ll
A    test/Bitcode/upgrade-clang-arc-use.ll.bc
A    test/Bitcode/upgrade-clang-arc-use.ll
U    test/Transforms/InferFunctionAttrs/annotate.ll
U    test/Transforms/InstCombine/memcmp-1.ll
U    test/Transforms/InstCombine/strcmp-1.ll
U    test/MC/AMDGPU/hsa-v3.s
U    test/tools/llvm-mca/X86/SkylakeClient/resources-x86_64.s
U    test/tools/llvm-mca/X86/SkylakeServer/resources-x86_64.s
U    test/tools/llvm-mca/X86/Haswell/resources-x86_64.s
A    test/tools/llvm-mca/X86/BtVer2/bottleneck-hints-none.s
U    test/tools/llvm-mca/X86/Broadwell/resources-x86_64.s
U    cmake/modules/CheckCompilerVersion.cmake
Updated to revision 355672.
-- clang project is enabled
-- clang-tools-extra project is enabled
-- compiler-rt project is disabled
-- debuginfo-tests project is disabled
-- libclc project is disabled
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-- polly project is disabled
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-- Could NOT find LibXml2 (missing:  LIBXML2_LIBRARIES LIBXML2_INCLUDE_DIR) 
-- Native target architecture is X86
-- Threads enabled.
-- Doxygen disabled.
-- Go bindings disabled.
-- Could NOT find OCaml (missing:  OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH) 
-- Could NOT find OCaml (missing:  OCAMLFIND OCAML_VERSION OCAML_STDLIB_PATH) 
-- OCaml bindings disabled.
-- Found Python module pygments
-- Found Python module pygments.lexers.c_cpp
-- Found Python module yaml
-- LLVM host triple: x86_64-unknown-linux-gnu
-- LLVM default target triple: x86_64-unknown-linux-gnu
-- Building with -fPIC
-- Constructing LLVMBuild project information
-- Linker detection: GNU ld
-- Targeting AArch64
-- Targeting AMDGPU
-- Targeting ARM
-- Targeting BPF
-- Targeting Hexagon
-- Targeting Lanai
-- Targeting Mips
-- Targeting MSP430
-- Targeting NVPTX
-- Targeting PowerPC
-- Targeting Sparc
-- Targeting SystemZ
-- Targeting WebAssembly
-- Targeting X86
-- Targeting XCore
-- Linker detection: GNU ld
-- Linker detection: GNU ld
-- there is no pre-generated ABI list for the requested libc++ configuration. check-cxx-abilist target is not supported
-- Sphinx enabled.
-- Clang version: 9.0.0
-- Could NOT find Z3 (missing:  Z3_LIBRARIES Z3_INCLUDE_DIR) (Required is at least version "4.7.1")
-- Sphinx enabled.
-- Sphinx enabled.
-- LLD version: 9.0.0
-- Sphinx enabled.
-- Sphinx enabled.
-- Failed to find LLVM FileCheck
-- git Version: v0.0.0
-- Version: 0.0.0
-- Performing Test HAVE_GNU_POSIX_REGEX -- failed to compile
-- Performing Test HAVE_POSIX_REGEX -- success
-- Performing Test HAVE_STEADY_CLOCK -- success
-- Configuring done
CMake Error at cmake/modules/AddLLVM.cmake:1376 (add_dependencies):
  The dependency target "clang-headers" of target "check-all" does not exist.
Call Stack (most recent call first):
  CMakeLists.txt:969 (add_lit_target)


CMake Error at tools/clang/tools/extra/clang-tidy/tool/CMakeLists.txt:11 (add_dependencies):
  The dependency target "clang-headers" of target "clang-tidy" does not
  exist.


CMake Error at cmake/modules/AddLLVM.cmake:1376 (add_dependencies):
  The dependency target "clang-headers" of target "check-clang-tools" does
  not exist.
Call Stack (most recent call first):
  cmake/modules/AddLLVM.cmake:1397 (add_lit_target)
  tools/clang/tools/extra/test/CMakeLists.txt:95 (add_lit_testsuite)


-- Generating done
-- Build files have been written to: /opt/sphinx-docs/build/llvm
make[1]: *** [cmake_check_build_system] Error 1
make: *** [docs/CMakeFiles/docs-llvm-html.dir/rule] Error 2