druntime redesign

[Denis Feklushkin]

On Monday, 16 March 2020 at 22:30:05 UTC, Denis Feklushkin wrote:
> On Sunday, 15 March 2020 at 18:05:50 UTC, Denis Feklushkin 
> wrote:
>> On Sunday, 15 March 2020 at 16:31:35 UTC, Vladimir Panteleev 
>> wrote:
>>> On Sunday, 15 March 2020 at 10:29:11 UTC, Denis Feklushkin 
>>> wrote:
>>>> What do you think about this? Is that good idea?
>
> https://github.com/dlang/druntime/pull/2994

Problem:

It is need to set default import directory depending on the 
platform. (Like currently compiler does default import for 
Phobos.) Otherwise Phobos and all other software isn't builds 
because platform specific code isn't imported.