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From: Peter Dimov (pdimov_at_[hidden])
Date: 2021-02-25 19:04:34

John Maddock wrote:
> There is no "only build this in C++X mode" for some value X, I was thinking
> about this the other day, and Boost.Config should probably add something
> that is the union of all our std-specific feature test macros that we could all
> use.
> In the mean time, adding:
> import ../../config/checks/config : requires ;
> To the top of the Jamfile and then to each target's requires clause add:
> [ requires cxx11_noexcept cxx11_rvalue_references sfinae_expr
> cxx11_auto_declarations cxx11_lambdas cxx11_unified_initialization_syntax
> cxx11_hdr_tuple cxx11_hdr_initializer_list cxx11_hdr_chrono
> cxx11_thread_local cxx11_constexpr cxx11_nullptr cxx11_numeric_limits
> cxx11_decltype cxx11_hdr_array cxx11_hdr_atomic cxx11_hdr_type_traits
> cxx11_allocator cxx11_explicit_conversion_operators ]
> And yes, this is over-verbose.

[ requires cxx11 ] would be a substantial improvement. :-)

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