Re: [boost] Warning from Boost.Exception

-----Original Message----- From: Boost On Behalf Of Emil Dotchevski via Boost Sent: 14 October 2019 20:29 To: Boost Cc: Emil Dotchevski Subject: Re: [boost] Warning from Boost.Exception

On Mon, Oct 14, 2019 at 9:36 AM Paul A Bristow via Boost < boost@lists.boost.org> wrote:

...

Using Clang 9 on Windows b2 toolset-clang-linux cxxstd=2a .

I am seeing lots of these warnings

In file included from ..\..\..\boost/test/included/unit_test.hpp:23: In file included from ..\..\..\boost/test/impl/execution_monitor.ipp:37: In file included from ..\..\..\boost/exception/diagnostic_information.hpp:11: ..\..\..\boost/exception/info.hpp:134:21: warning: delete called on non-final 'boost::exception_detail::error_info_container_impl' that has virtual functions but non-virtual destructor

[-Wdelete-non-abstract-non-virtual-dtor] delete this; ^ It seems that trying to supress is ineffective with

-Wno-delete-non-abstract-non-virtual-dtor

Perhaps by design?

https://releases.llvm.org/9.0.0/tools/clang/docs/DiagnosticsReference. html#wdele te-non-abstract-non-virtual-dtor <https://releases.llvm.org/9.0.0/tools/clang/docs/DiagnosticsReference .html#wdelete-non-abstract-non-virtual-dtor> -Wdelete-non-abstract-non-virtual-dtor < https://releases.llvm.org/9.0.0/tools/clang/docs/DiagnosticsReference. html>

Diagnostic text: warning: delete

destructor

called on non-final B that has virtual functions but non-virtual destructor -Wdelete-non-virtual-dtor < https://releases.llvm.org/9.0.0/tools/clang/docs/DiagnosticsReference. html>

Some of the diagnostics controlled by this flag are enabled by default. Controls -Wdelete-abstract-non-virtual-dtor < https://releases.llvm.org/9.0.0/tools/clang/docs/DiagnosticsReference. html> , -Wdelete-non-abstract-non-virtual-dtor < https://releases.llvm.org/9.0.0/tools/clang/docs/DiagnosticsReference. html> . Should I be concerned about this?

You shouldn't be concerned about this and also you shouldn't be getting warnings.

Thanks, that's reassuring 😊

What platforms, what command line?

Obscure 😉 - Windows 10, develop branch, Clang 9 using effectively clang-linux (I think I remember that clang-win was the same) I:\boost\libs\multiprecision\example>b2 toolset=clang cxxstd=2a address-model=64 release No extra pedantic settings (some other warnings I have suppressed, but this one seems unquietable). HTH Paul Paul A. Bristow Prizet Farmhouse Kendal, Cumbria LA8 8AB UK