[Boost-build] B2 configuration check information can be confusing?

From: pbristow_at_[hidden]
Date: 2019-08-23 11:05:53

I got this configuration info below from a b2 toolset=msvc,gcc command

I was puzzled to see contradictory information

    - __float128               : no

But later

    - __float128               : yes

After some confusion, the penny eventually dropped and I concluded that info was
first for msvc and then second for gcc, (or was it address-model=32 and 64)?

Could this be easily made clearer?

Even a newline might give clues, but showing the toolset would be even better?

Thanks

Paul

Paul A. Bristow
Prizet Farmhouse
Kendal, Cumbria 
LA8 8AB           UK

Performing configuration checks

    - default address-model    : 32-bit
    - default architecture     : x86
    - symlinks supported       : yes
    - has_icu builds           : no
    - BOOST_COMP_GNUC >= 4.3.0 : no
    - Boost.Config Feature Check: cxx11_auto_declarations : yes
    - Boost.Config Feature Check: cxx11_lambdas : yes
    - Boost.Config Feature Check: cxx11_unified_initialization_syntax : yes
    - Boost.Config Feature Check: cxx11_smart_ptr : yes
    - GCC libquadmath and __float128 support : no
    - Boost.Config Feature Check: cxx11_hdr_initializer_list : yes
    - Boost.Config Feature Check: sfinae_expr : yes
    - Boost.Config Feature Check: cxx11_range_based_for : yes
    - libfftw3                 : no
    - __float128               : no
    - Boost.Config Feature Check: cxx11_decltype : yes
    - Boost.Config Feature Check: cxx11_variadic_templates : yes
    - has_ntl_rr builds        : no
    - has_mpfr_class builds    : no
    - has_mpreal builds        : no
    - has_e_float builds       : no
    - gcc visibility           : no
    - long double support      : yes
    - Boost.Config Feature Check: cxx11_hdr_tuple : yes
    - Boost.Config Feature Check: cxx11_defaulted_functions : yes
    - has_eigen builds         : no
    - Boost.Config Feature Check: cxx11_constexpr : yes
    - Boost.Config Feature Check: cxx11_hdr_array : yes
    - Boost.Config Feature Check: cxx17_if_constexpr : no
    - Boost.Config Feature Check: cxx17_std_apply : no
    - Intel _Quad datatype support : no
    - Boost.Config Feature Check: cxx11_hdr_thread : yes
    - Boost.Config Feature Check: cxx11_hdr_atomic : yes
    - Boost.Config Feature Check: cxx11_hdr_future : yes
    - Boost.Config Feature Check: cxx11_hdr_chrono : yes
    - Boost.Config Feature Check: cxx11_hdr_random : yes
    - Boost.Config Feature Check: cxx11_allocator : yes
    - Boost.Config Feature Check: cxx11_inline_namespaces : yes
    - has_mpfr builds          : no
    - 128-bit floatmax_t       : no
    - Boost.Config Feature Check: cxx11_numeric_limits : yes
    - Boost.Config Feature Check: cxx11_explicit_conversion_operators : yes
    - Boost.Config Feature Check: cxx11_function_template_default_args : yes
    - Boost.Config Feature Check: cxx11_hdr_mutex : yes
    - default address-model    : 64-bit
    - default architecture     : x86
    - has_icu builds           : no
    - BOOST_COMP_GNUC >= 4.3.0 : yes
    - Boost.Config Feature Check: cxx11_auto_declarations : yes
    - Boost.Config Feature Check: cxx11_lambdas : yes
    - Boost.Config Feature Check: cxx11_unified_initialization_syntax : yes
    - Boost.Config Feature Check: cxx11_smart_ptr : yes
    - GCC libquadmath and __float128 support : yes
    - Boost.Config Feature Check: cxx11_hdr_initializer_list : yes
    - Boost.Config Feature Check: sfinae_expr : yes
    - Boost.Config Feature Check: cxx11_range_based_for : yes
    - libfftw3                 : no
    - __float128               : yes
    - Boost.Config Feature Check: cxx11_decltype : yes
    - Boost.Config Feature Check: cxx11_variadic_templates : yes
    - has_ntl_rr builds        : no
    - has_mpfr_class builds    : no
    - has_mpreal builds        : no
    - has_e_float builds       : no
    - gcc visibility           : yes
    - long double support      : yes
    - Boost.Config Feature Check: cxx11_hdr_tuple : yes
    - Boost.Config Feature Check: cxx11_defaulted_functions : yes
    - has_eigen builds         : no
    - Boost.Config Feature Check: cxx11_constexpr : yes
    - Boost.Config Feature Check: cxx11_hdr_array : yes
    - Boost.Config Feature Check: cxx17_if_constexpr : no
    - Boost.Config Feature Check: cxx17_std_apply : no
    - Intel _Quad datatype support : no
    - Boost.Config Feature Check: cxx11_hdr_thread : no
    - Boost.Config Feature Check: cxx11_hdr_atomic : yes
    - Boost.Config Feature Check: cxx11_hdr_future : yes
    - Boost.Config Feature Check: cxx11_hdr_chrono : yes
    - Boost.Config Feature Check: cxx11_hdr_random : yes
    - Boost.Config Feature Check: cxx11_allocator : yes
    - Boost.Config Feature Check: cxx11_inline_namespaces : yes
    - has_mpfr builds          : no
    - 128-bit floatmax_t       : yes
    - Boost.Config Feature Check: cxx11_numeric_limits : yes
    - Boost.Config Feature Check: cxx11_explicit_conversion_operators : yes
    - Boost.Config Feature Check: cxx11_function_template_default_args : yes
    - Boost.Config Feature Check: cxx11_hdr_mutex : no
...patience...