[www-scripts] Sphinx Doc Update: ERROR

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/opt/tools/sphinx_update.sh: warning: removing stale lock file from PID 1656.
UPDATING cfe SOURCES
Updating '.':
U    lib/Basic/Builtins.cpp
U    lib/Sema/SemaDeclCXX.cpp
U    lib/Sema/SemaDeclAttr.cpp
U    lib/Sema/SemaInit.cpp
U    lib/Driver/ToolChains/HIP.cpp
U    lib/Driver/ToolChains/WebAssembly.h
U    lib/Driver/ToolChains/WebAssembly.cpp
U    lib/Driver/ToolChains/MSP430.h
U    lib/Driver/ToolChains/Clang.cpp
U    lib/Driver/Driver.cpp
U    lib/CodeGen/CodeGenModule.cpp
U    lib/CodeGen/TargetInfo.cpp
U    lib/CodeGen/CGVTables.cpp
U    lib/CodeGen/CodeGenFunction.h
U    lib/CodeGen/CGBuiltin.cpp
U    lib/Headers/emmintrin.h
U    lib/Headers/avxintrin.h
U    lib/Headers/intrin.h
U    lib/Headers/xmmintrin.h
U    test/CodeGenObjC/os_log.m
U    test/CodeGenObjC/gnu-init.m
A    test/CodeGen/fortify-std-lib.c
U    test/CodeGen/sse-builtins.c
U    test/CodeGen/compound-literal.c
U    test/CodeGen/ms-x86-intrinsics.c
A    test/CodeGen/msp430-reloc.c
A    test/CodeGen/construction-vtable-visibility.cpp
U    test/CodeGen/avx512f-builtins.c
U    test/CodeGen/avx-builtins.c
U    test/CodeGen/sse2-builtins.c
A    test/CodeGenOpenCL/visibility.cl
U    test/AST/ast-dump-attr.cpp
U    test/Driver/hip-toolchain-no-rdc.hip
A    test/Driver/hip-toolchain-features.hip
U    test/Driver/hip-toolchain-rdc.hip
U    test/Driver/wasm-toolchain.c
U    test/Headers/ms-arm64-intrin.cpp
U    test/Analysis/compound-literals.c
A    test/Sema/fortify-std-lib.c
A    test/Sema/crash-deduction-guide-access.cpp
U    test/Preprocessor/wasm-target-features.c
U    test/CodeGenCXX/arm-swiftcall.cpp
U    test/CodeGenCXX/cxx1z-init-statement.cpp
U    test/CodeGenCXX/cxx2a-compare.cpp
U    test/CodeGenCXX/debug-info-inheriting-constructor.cpp
U    test/CodeGenCXX/vtable-layout.cpp
U    test/Misc/pragma-attribute-supported-attributes-list.test
U    cmake/caches/Fuchsia.cmake
U    include/clang/Frontend/Utils.h
U    include/clang/Basic/Attr.td
U    include/clang/Basic/AttrDocs.td
U    include/clang/Basic/DiagnosticSemaKinds.td
U    include/clang/Basic/Builtins.h
U    include/clang/AST/Decl.h
U    include/clang/StaticAnalyzer/Core/PathSensitive/SMTConstraintManager.h
U    include/clang/Driver/ToolChain.h
U    include/clang/Driver/Options.td
U    docs/ShadowCallStack.rst
Updated to revision 353890.
CMake Error at cmake/modules/CheckCompilerVersion.cmake:40 (message):
  Host GCC version should be at least 5.1 because LLVM will soon use new C++
  features which your toolchain version doesn't support.  Your version is
  4.8.4.  You can temporarily opt out using
  LLVM_TEMPORARILY_ALLOW_OLD_TOOLCHAIN, but very soon your toolchain won't be
  supported.
Call Stack (most recent call first):
  cmake/modules/CheckCompilerVersion.cmake:45 (check_compiler_version)
  cmake/config-ix.cmake:13 (include)
  CMakeLists.txt:629 (include)


-- Configuring incomplete, errors occurred!
See also "/opt/sphinx-docs/build/llvm/CMakeFiles/CMakeOutput.log".
See also "/opt/sphinx-docs/build/llvm/CMakeFiles/CMakeError.log".
make[1]: *** [cmake_check_build_system] Error 1
make: *** [tools/clang/docs/CMakeFiles/docs-clang-html.dir/rule] Error 2