Nice document.

6.4 I believe LHU imported through include will need to be identified by
either

   - Having a manually maintained list of LHU
   - Parsing all files in the projects/dependency and assuming that files
   that are not imported with import at least once are not LHU


I agree that letting the compiler decides to treat an include as an LHU
without the blessing of the build system would be asking for trouble


On Fri, 8 Feb 2019 at 17:51 Gabriel Dos Reis via Ext <ext_at_[hidden]>
wrote:

> Early feedback regarding section 6.3 and 6.4.
>
> Concern in 6.3:
> The description there is notional, not a requirement that needs to be
> followed by the letter by compilers.
> There is an alternative formulation that uses the notion or "semantics
> abstract graph" (term defined in the Modules TS) that does not rely on
> synthesized header unit.
>
> Concern in 6.4:
> The way to import of "header import" is that of using a precompiled header
> file. If CMAKE already supports uses of PCHs, then the machinery is
> already there.
> For every import of a header H, there would be a rule for building say
> H.pch unless there is already a H.pch supplied by the system or other
> sources.
>
>
> Early feedback on section 7.
> That ask in 7.1 looks immensely reasonable to me; we have been considering
> similar for a while.
> The Visual C++ team would be happy to team up with other tool vendor to
> provide an open source version.
>
> -- Gaby
>
> | -----Original Message-----
> | From: tooling-bounces_at_[hidden] <tooling-bounces_at_[hidden]> On
> | Behalf Of Ben Boeckel
> | Sent: Friday, February 8, 2019 7:55 AM
> | To: WG21 Tooling Study Group SG15 <tooling_at_[hidden]>
> | Subject: [Tooling] [D1483] How CMake supports Fortran modules and its
> | applicability to C++
> |
> | Hi,
> |
> | Here is copy of Kitware's paper to be discussed at Kona. I have a PDF,
> | but it was too large to attach to the list. I'll be at Kona, but the
> | other authors are not able to make it.
> |
> | An HTML version is hosted here:
> |
> |
> | https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fmath
> | stuf.fedorapeople.org%2Ffortran-modules%2Ffortran-
> | modules.html&amp;data=02%7C01%7Cgdr%40microsoft.com%7Cd49f0fb63
> | aac4ce886ff08d68dddd8b0%7C72f988bf86f141af91ab2d7cd011db47%7C1%7
> | C1%7C636852381303060160&amp;sdata=ltkTtPf84tUk76Am5swiz6eNBGqZW
> | ydRfDoswsYEmlA%3D&amp;reserved=0
> |
> | Feedback welcome.
> |
> | Thanks,
> |
> | --Ben
> | _______________________________________________
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> | icrosoft.com%7Cd49f0fb63aac4ce886ff08d68dddd8b0%7C72f988bf86f141af9
> | 1ab2d7cd011db47%7C1%7C1%7C636852381303060160&amp;sdata=YLene6t
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