[www-scripts] Doxygen Doc Update: ERROR

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UPDATING /opt/doxygen-docs/src/llvm
Updating '.':
U    test/CodeGen/X86/sadd_sat.ll
U    test/CodeGen/X86/phaddsub-extract.ll
U    test/CodeGen/X86/setcc-combine.ll
U    test/CodeGen/X86/combine-sse41-intrinsics.ll
U    test/CodeGen/X86/funnel-shift.ll
U    test/CodeGen/X86/sadd_sat_vec.ll
U    test/CodeGen/X86/haddsub.ll
U    test/CodeGen/X86/ssub_sat_vec.ll
A    test/CodeGen/X86/combine-bitreverse.ll
U    test/CodeGen/X86/ssub_sat.ll
A    test/CodeGen/X86/combine-bswap.ll
U    test/CodeGen/AArch64/GlobalISel/legalize-ext-csedebug-output.mir
U    test/CodeGen/AArch64/arm64-rev.ll
A    test/tools/yaml2obj/dynamic-section-i386.test
U    include/llvm/Analysis/InstructionSimplify.h
U    include/llvm/Analysis/ConstantFolding.h
U    include/llvm/Transforms/Utils/Local.h
U    include/llvm/Transforms/Scalar/LowerWidenableCondition.h
U    include/llvm/CodeGen/SelectionDAGNodes.h
U    include/llvm/CodeGen/TargetLowering.h
U    include/llvm/IR/Statepoint.h
U    tools/yaml2obj/yaml2elf.cpp
U    tools/llvm-objcopy/MachO/MachOReader.h
U    tools/llvm-objcopy/MachO/MachOObjcopy.h
U    tools/llvm-objcopy/MachO/MachOWriter.cpp
U    tools/llvm-objcopy/MachO/MachOWriter.h
U    tools/llvm-objcopy/MachO/MachOReader.cpp
U    tools/llvm-objcopy/MachO/Object.h
U    tools/llvm-objcopy/MachO/MachOObjcopy.cpp
U    utils/gn/secondary/clang-tools-extra/clang-tidy/BUILD.gn
U    unittests/Transforms/Vectorize/VPlanPredicatorTest.cpp
U    unittests/CodeGen/TypeTraitsTest.cpp
U    lib/Analysis/InstructionSimplify.cpp
U    lib/Analysis/InlineCost.cpp
U    lib/Analysis/ConstantFolding.cpp
U    lib/Target/X86/X86InstrFPStack.td
U    lib/Target/X86/X86ISelLowering.cpp
U    lib/Transforms/Scalar/PlaceSafepoints.cpp
U    lib/Transforms/Scalar/SCCP.cpp
U    lib/Transforms/Scalar/RewriteStatepointsForGC.cpp
U    lib/Transforms/Scalar/LowerWidenableCondition.cpp
U    lib/Transforms/Vectorize/VPlanPredicator.h
U    lib/Transforms/Vectorize/VPlanPredicator.cpp
U    lib/Transforms/Utils/Local.cpp
U    lib/Transforms/Utils/Evaluator.cpp
U    lib/CodeGen/SelectionDAG/StatepointLowering.cpp
U    lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
U    lib/CodeGen/SelectionDAG/TargetLowering.cpp
U    lib/CodeGen/SelectionDAG/SelectionDAG.cpp
U    lib/CodeGen/SelectionDAG/DAGCombiner.cpp
U    lib/CodeGen/SelectionDAG/SelectionDAGBuilder.h
U    lib/IR/Statepoint.cpp
Updated to revision 353667.
UPDATING /opt/doxygen-docs/src/llvm/tools/clang
Updating '.':
U    test/CodeGen/powerpc_types.c
U    test/Analysis/osobjectcstylecastchecker_test.cpp
U    test/Profile/cxx-virtual-destructor-calls.cpp
U    test/Profile/cxx-lambda.cpp
U    test/Profile/cxx-throws.cpp
U    test/Profile/cxx-stmt-initializers.cpp
U    test/Profile/cxx-templates.cpp
U    test/Profile/cxx-rangefor.cpp
U    test/CoverageMapping/unused_names.c
U    cmake/caches/Fuchsia-stage2.cmake
U    lib/Basic/Targets/PPC.h
Updated to revision 353667.
UPDATING /opt/doxygen-docs/src/llvm/tools/clang/tools/extra sources
Updating '.':
At revision 353667.
UPDATING /opt/doxygen-docs/src/llvm/tools/polly sources
Updating '.':
At revision 353667.
Generating Makefiles
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/doxygen-docs/build/CMakeFiles/CMakeOutput.log".
See also "/opt/doxygen-docs/build/CMakeFiles/CMakeError.log".