tree 9ffe7621d846370c3c43f77eb07552f0093c7b82
parent 76fc4045796e3f908b71893f0f452365aeda3db9
author Alex Stewart <alexs.mac@gmail.com> 1521143530 +0000
committer Alex Stewart <alexs.mac@gmail.com> 1521452448 +0000

Fix C++11 detection for VS2010.

- Use cmake_dependent_option() for all threading models and encode their
  respective mutual exclusivity in the dependent-option s/t the job of
  ensuring mutual exclusivity is performed by CMake.
- Use of cmake_dependent_option() has the downside that options are
  removed from the GUI if their requirements for availability are not
  met.  So if CXX11 is OFF, then neither TBB nor CXX11_THREADS will
  even appear as options (they will be undefined, assumed OFF).
- Perform checks for availability of C++11 if CXX11 is enabled prior to
  testing other options to handle dependence of TBB & CXX11_THREADS on
  CXX11 actually being present.
- Add check for availability of C++11-specific math functions used in
  jet.h before reporting C++11 as found.
- Add check for <atomic> before allowing TBB or CXX11_THREADS, as both
  options require it and it may not always be available even if the
  other required C++11 components are.

Change-Id: Ife8cd182aeb1978539ce2c9966910ae59ebd9177