[Boost-build] [requires] cxx11_variadic_macros

Subject: [Boost-build] [requires] cxx11_variadic_macros
From: Raffi Enficiaud (raffi.enficiaud_at_[hidden])
Date: 2015-10-13 11:41:46

Hi all,

I have the following requirement on my bjam:

requirements_boost_test = [ requires cxx11_variadic_macros ] ;

When I compile it on clang/OSX, in C++03 mode, I have this:

../../../b2

     - Boost.Config Feature Check: cxx11_variadic_macros : yes
     - Boost.Config Feature Check: cxx11_decltype : no
     - Boost.Config Feature Check: cxx11_hdr_random : yes
     - Boost.Config Feature Check: cxx11_hdr_tuple : no
     - Boost.Config Feature Check: cxx11_hdr_initializer_list : no

When I compile it on clang6/OSX, in C++11 mode, I have this

../../../b2  cxxflags="-stdlib=libc++ -std=c++11" 
linkflags="-stdlib=libc++"

     - Boost.Config Feature Check: cxx11_variadic_macros : yes
     - Boost.Config Feature Check: cxx11_decltype : yes
     - Boost.Config Feature Check: cxx11_hdr_random : yes
     - Boost.Config Feature Check: cxx11_hdr_tuple : yes
     - Boost.Config Feature Check: cxx11_hdr_initializer_list : yes

The cxx11_variadic_macros is active for both configuration, but the 
variadic macros are not available with the "b2" toolset configuration.

When it says cxx11_variadic_macros, I believe it does not try to compile 
with C++11 mode.

How would I detect properly the support for variadic macros?

Thanks,
Raffi