Failed vgm building on macOS

[marteff]

Dear ROOT experts,

I am experiencing problems concerning vgm@4.4 building with alibuild, related to the inclusion of ROOT libraries:

/Applications/root/include/RStringView.h:35:12: error: no template named 'basic_string_view'
   typedef basic_string_view<char> string_view;
           ^
/Applications/root/include/RStringView.h:50:28: error: no member named 'to_string' in 'std::__1::basic_string_view<char, std::__1::char_traits<char> >'
      return std::stod(str.to_string(),pos);
                       ~~~ ^
In file included from /Applications/SHiPBuild/sw/SOURCES/vgm/4.4/4.4/packages/RootGM/source/common/axis.cxx:22:
In file included from /Applications/root/include/TGeoMatrix.h:22:
In file included from /Applications/root/include/TNamed.h:29:
/Applications/root/include/TString.h:117:75: error: no member named 'to_string' in 'std::__1::basic_string_view<char, std::__1::char_traits<char> >'
   operator std::string() const { return std::string_view(Data(),fExtent).to_string(); }
                                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ^

Any suggestion on how to fix it? Many thanks in advance.

Cheers,
Martina

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ROOT Version : 6.12/06
Xcode version: 9.3
Platform, compiler: High Sierra 10.13.4, gcc 6.4.0_2

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[ganis]

Dear Martina,

Can you check if this post helps ?

G Ganis

[marteff]

Thank you for the provided links.
Unfortunately, even building Root from scratch didn’t fix the issue.

[ganis]

Did you check with the VGM people? What is the code that fails building?

G Ganis