[Dlang-internal] druntime: proposed changes in code organization

[Johan]

On Saturday, 2 December 2023 at 08:10:57 UTC, Denis Feklushkin 
wrote:
> On Friday, 1 December 2023 at 12:53:55 UTC, IGotD- wrote:
>
>> Thank you, now I have a better understanding what a tag is. 
>> Correct me if I'm wrong so these tags are like "feature 
>> defines" similarly to a boatload of C defines that you must 
>> define for certain C-libraries.
>
> No, if I correctly understand this "C features defines" concept
>
>> Will these tags eventually become version identifiers inside 
>> the code?
>
> No
>
>> Also one question if the tags are visible inside the D code or 
>> just outside the code in the build system?
>
> Tags are visible only for druntime build system

How is this going to work for cross-compilation with _one_ 
compiler druntime? LDC is a cross-compiler and uses the same 
source files for any target. A single LDC installation must be 
able to compile to any target platform, i.e. with a single 
druntime installation. (target-dependent copying of files by the 
compiler build system does not fulfill that requirement)
To me, it sounds like your changes make separate druntime 
installations per target. This is not acceptable for LDC. But 
perhaps I misunderstood your changes.

-Johan