druntime homebrew: setup and compile a single project with its own stdlib

[Hipreme]

On Saturday, 28 October 2023 at 18:37:37 UTC, Dmitry Ponyatov 
wrote:
> I want to play with reimplementing some tiny set of standard D 
> library, mostly for language learning, and need some advice
> - is it possible to use `dub` both for building custom druntime 
> and test app?
> - or I must write some batch or Makefile and call `dmd` 
> compiler directly onto every file?
> - what `dmd`/`dub` command line options forces it to drop 
> system-wide druntime/phobos and use custom local .so / .a 
> library in place of it?


> - is it possible to use `dub` both for building custom druntime 
> and test app?
Yes, my engine does that

> what `dmd`/`dub` command line options forces it to drop  
> system-wide druntime/phobos and use custom local .so / .a 
> library in place of it?

If you have a module source file with the same name you want to 
replace, the build will prioritize your own version.