Re: [boost.cobalt] Cobalt not building with b2 on Windows

From: Peter Dimov (pdimov_at_[hidden])
Date: 2024-08-24 10:36:34

Andreas Weis wrote:
> Hi everyone,
> 
> It's my understanding that Cobalt is *not* a header-only library, yet it seems
> that it is not built as part of the b2 build.
> 
> I'm building Boost with b2 on Windows (MSVC 2022, version 19.41) and it
> seems that Cobalt is not being built properly. I am using the following
> command line:
> 
> b2 --toolset=msvc-14.3 --build-type=complete architecture=x86
> address-model=64 --stagedir=stage -j 8
> 
> As far as I can tell, this works correctly for all libraries except Cobalt. While b2
> does list cobalt as part of the "Component configuration" listing in the output:
> 
>      - atomic                   : building
>      - charconv                 : building
>      - chrono                   : building
>      - cobalt                   : building
>      [...]
> 
> 
> But I get neither binaries nor a folder cmake/boost_cobalt* with this.

Cobalt is a C++20 library, so you'd need to add `cxxstd=20` to your command line.