druntime redesign

[Denis Feklushkin]

On Tuesday, 25 February 2020 at 01:21:33 UTC, Denis Feklushkin 
wrote:
> More specific proposal how to achieve this step by step:

> Сommunity may agree to add druntime module "core.sys.abstract" 
> and everywhere in druntime code what references to a specific 
> OSes and architecures (all these thousands of "version(){} else 
> version(){}") will add also obtain code like

Probably I seem to know easiest way:

Many modules are scattered by version() keywords that implement 
common calls necessary when using any platform.
For brief example look into: core/sync/event.d

We can improve Makefiles (and cmake in case of LDC fork of 
druntime) to include only needed platform-dependend subdirs what 
will contain these modules but without "versions", just code for 
each supported platform.
(Do not confuse with core.sys.platform_name section!)

(And I couldn’t do it myself right now because I don’t know well 
enough make and cmake systems. I am need "initial sample 
template" to do things like in it.)

After such replacement it will be very easy to clear out 
remaining libc calls (if it will be need - all supported 
platforms actually have libc interfaces), and also support for 
new arbitrary platforms will be ready - for supporting any new 
platform will be enough to replace platform-specific section with 
your own at build stage by build system.

What do you think about this? Is that good idea?