[www-scripts] Clang Attribute Doc Update: ERROR

[LLVM via www-scripts]

UPDATING /opt/clang_commandline_docs//src/llvm LLVM SOURCES
Updating '.':
U    test/tools/llvm-readobj/note-gnu-property.s
U    test/MC/ELF/invalid-symver.s
U    test/MC/ELF/multiple-different-symver.s
U    include/llvm/BinaryFormat/ELF.h
U    tools/llvm-readobj/ELFDumper.cpp
U    lib/Transforms/Scalar/LoopSimplifyCFG.cpp
U    lib/MC/ELFObjectWriter.cpp
Updated to revision 353912.
UPDATING /opt/clang_commandline_docs//src/llvm/llvm/tools/clang CLANG SOURCES
Updating '.':
At revision 353912.
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/clang_commandline_docs/build/llvm/CMakeFiles/CMakeOutput.log".
See also "/opt/clang_commandline_docs/build/llvm/CMakeFiles/CMakeError.log".