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Alex Stewart
6414bd0279
- On at least some compilers, -std=c++11 is required in order to compile against std::shared_ptr & std::unordered_map, which resulted in our checks failing to find them and using the TR1 versions instead, which causes conflicts for users using C++11. - Now, if the compiler supports it and the user enables the CXX11 option, we explicitly enable C++11 before searching for shared_ptr & unordered_map, which means we should always find the C++11 versions if they are available. - As use of CXX11 results in a version of Ceres that must be used with -std=c++11 for GCC & Clang, we roll this into the Ceres target when the version of CMake supports this, otherwise we warn the user they will have to do this themselves. - CXX11 is OFF by default, to ensure that the behaviour of Ceres is unchanged from before. Change-Id: I157ea7a4fadc6bc02da176b8e771f1f327ccaf78