Re: A proposal for a modern build-system

From: Hassan Sajjad (hassan.sajjad069_at_[hidden])
Date: 2024-03-22 10:04:53

>
> That's incorrect: build2 had support for header units (with include
> translation) from 2021:
>

Thank you for informing me. I did not know about it. Can you give bigger
examples? Is it used in production anywhere?

On Fri, Mar 22, 2024 at 11:00 AM Boris Kolpackov <boris_at_[hidden]>
wrote:

> Hassan Sajjad via Boost <boost_at_[hidden]> writes:
>
> > It supports drop-in header-files to header-units replacement. While
> > compilers support processing a header-file as header-unit, no other
> > build-system supports this feature.
>
> That's incorrect: build2 had support for header units (with include
> translation) from 2021:
>
> https://build2.org/blog/build2-cxx20-modules-gcc.xhtml
>
> (Funny enough that support was announced in Feb 2021 while I see the
> first commit in the HMake repository was also made in Feb 2021, so
> build2 had header unit support for as long as HMake existed ;-)).
>
> And speaking of compilers, currently only GCC provides enough
> build system integration (in the form of the module mapper) to
> allow accurately supporting header units without making the
> user specify the dependencies manually (or imposing equivalent
> requirements like pre-compiling all the header units used by
> the project upfront). For background, see:
>
>
> https://developercommunity.visualstudio.com/t/scanDependencies-does-not-take-into-acc/10029154
>