[www-scripts] Sphinx Doc Update: ERROR

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/opt/tools/sphinx_update.sh: warning: removing stale lock file from PID 10995.
UPDATING llvm SOURCES
Updating '.':
U    utils/gn/secondary/llvm/lib/Support/BUILD.gn
U    utils/gn/secondary/llvm/lib/Transforms/InstCombine/BUILD.gn
U    utils/gn/secondary/llvm/include/llvm/Config/BUILD.gn
U    utils/gn/secondary/clang/include/clang/Config/BUILD.gn
U    utils/gn/secondary/clang/lib/StaticAnalyzer/Core/BUILD.gn
U    utils/gn/secondary/clang/test/BUILD.gn
U    tools/llvm-objcopy/CopyConfig.cpp
U    tools/llvm-objcopy/ObjcopyOpts.td
U    lib/Transforms/Instrumentation/InstrProfiling.cpp
U    lib/Transforms/IPO/ArgumentPromotion.cpp
U    lib/Target/Mips/MipsLegalizerInfo.cpp
U    lib/Target/Mips/MipsInstructionSelector.cpp
U    lib/Target/AMDGPU/SIRegisterInfo.td
U    lib/Target/AMDGPU/SIInstructions.td
U    lib/Target/AMDGPU/VOPInstructions.td
U    lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
U    lib/Target/AMDGPU/AMDGPUSubtarget.cpp
U    lib/Target/AMDGPU/Utils/AMDGPUBaseInfo.cpp
U    lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
U    lib/Target/AMDGPU/AMDGPUInstructions.td
U    lib/Target/AMDGPU/InstPrinter/AMDGPUInstPrinter.cpp
U    lib/Target/AMDGPU/AMDGPU.td
U    lib/Target/AMDGPU/SIInstrFormats.td
U    lib/Target/AMDGPU/VOPCInstructions.td
U    lib/Target/AMDGPU/SMInstructions.td
U    lib/Target/AMDGPU/Disassembler/AMDGPUDisassembler.cpp
U    lib/Target/AMDGPU/VOP2Instructions.td
U    lib/Target/AMDGPU/AsmParser/AMDGPUAsmParser.cpp
U    lib/Target/AMDGPU/GCNProcessors.td
U    lib/Target/AMDGPU/VOP1Instructions.td
U    lib/Target/AMDGPU/SOPInstructions.td
U    lib/Target/AMDGPU/DSInstructions.td
U    lib/Target/AMDGPU/SIRegisterInfo.cpp
U    lib/Target/AMDGPU/SIFrameLowering.cpp
U    lib/Target/AMDGPU/MIMGInstructions.td
U    lib/Target/X86/X86InstrFPStack.td
U    lib/Target/X86/X86InstrInfo.cpp
U    lib/Target/X86/X86ISelLowering.cpp
U    lib/CodeGen/GlobalISel/LegalizerHelper.cpp
U    lib/CodeGen/SelectionDAG/TargetLowering.cpp
U    lib/CodeGen/SelectionDAG/DAGCombiner.cpp
U    test/tools/dsymutil/X86/modules-empty.m
U    test/tools/dsymutil/X86/modules-pruning.cpp
U    test/tools/dsymutil/X86/modules-dwarf-version.m
U    test/tools/dsymutil/X86/module-warnings.test
U    test/tools/llvm-objcopy/ELF/weaken.test
U    test/tools/llvm-objcopy/ELF/globalize.test
U    test/tools/llvm-objcopy/ELF/localize.test
U    test/tools/llvm-objcopy/ELF/strip-symbol.test
U    test/Transforms/ArgumentPromotion/profile.ll
A    test/MC/AMDGPU/lds_direct-err.s
A    test/MC/AMDGPU/lds_direct.s
A    test/MC/Disassembler/AMDGPU/lds_direct_gfx9.txt
U    test/Instrumentation/InstrProfiling/platform.ll
A    test/Instrumentation/InstrProfiling/comdat.ll
U    test/Instrumentation/InstrProfiling/linkage.ll
U    test/Instrumentation/InstrProfiling/PR23499.ll
A    test/CodeGen/Mips/GlobalISel/llvm-ir/truncStore_and_aExtLoad.ll
A    test/CodeGen/Mips/GlobalISel/legalizer/truncStore_and_aExtLoad.mir
U    test/CodeGen/AMDGPU/GlobalISel/legalize-shl.mir
U    test/CodeGen/AMDGPU/GlobalISel/legalize-zextload-flat.mir
U    test/CodeGen/X86/funnel-shift.ll
U    docs/CMake.rst
A    test/CodeGen/Mips/GlobalISel/instruction-select/truncStore_and_aExtLoad.mir
U    test/CodeGen/AMDGPU/amdpal.ll
U    test/CodeGen/AMDGPU/GlobalISel/legalize-sextload-flat.mir
A    test/CodeGen/Mips/GlobalISel/regbankselect/truncStore_and_aExtLoad.mir
U    test/CodeGen/AMDGPU/memory-legalizer-mesa3d.ll
U    test/CodeGen/AMDGPU/GlobalISel/legalize-implicit-def.mir
U    test/CodeGen/AMDGPU/GlobalISel/legalize-addrspacecast.mir
U    cmake/modules/HandleLLVMOptions.cmake
U    test/CodeGen/X86/umul_fix.ll
U    include/llvm/ProfileData/InstrProfData.inc
Updated to revision 353550.
-- Could NOT find Z3 (missing:  Z3_LIBRARIES Z3_INCLUDE_DIR) (Required is at least version "4.7.1")
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:655 (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: *** [docs/CMakeFiles/docs-llvm-html.dir/rule] Error 2