C++11 is the minimal version of the C++ standard required by oneTBB. An implementation of oneTBB shall not require newer versions of the standard except where explicitly specified; also it shall not require any non-standard language extensions.
An implementation may use platform-specific APIs if those are compatible with the C++ execution and memory models. For example, a platform-specific implementation of threads may be used if that implementation provides the same execution guarantees as C++ threads.
An implementation of oneTBB shall support execution on single core and multi-core CPUs, including those that provide simultaneous multithreading capabilities.
On CPU, an implementation shall support nested parallelism, so that one can build larger parallel components from smaller parallel components.