tree 66508f82c163ed4da3cbde002ee3b018f2e617c2
parent a80b8cfeac6cd54cabbfd93ac09dbe527569738a
author Alex Stewart <alexs.mac@gmail.com> 1521470347 +0000
committer Alex Stewart <alexs.mac@gmail.com> 1521470347 +0000

Move C++11 checks to after external find_package() calls.

- Testing for C++11, and subsequent testing for components using C++11
  requires adding -std=c++11 to CMAKE_REQUIRED_FLAGS used by the
  check_cxx_source_compiles() (and similar) macros if required by the
  compiler.
- This variable is also used for the C equivalent macros, which are used
  by find_package(BLAS), and would cause the detection to fail if
  present.
- Thus if CXX11 was forced ON via -D (not via the GUI) then detection
  would fail (with the GUI an initial configure without CXX11 would
  initialise the variables and no errors would occur in later
  reconfigures).

Change-Id: I08d300baf3730e926fb8e853a384badcceefeaf5