D infrastructure: make/cmake -> Meson ?

[Denis Feklushkin]

Hi!

Will community accept PRs for switching build of druntime, 
Phobos, maybe DMD and maybe LDC from make/cmake to Meson build 
system?

An important condition: current build system should be abandoned 
immediately after sucessful testing of new build system. This 
should not be a parallel existence of several build systems, 
because it will not give any advantages but will strengthen 
disadvantages.

Related:
https://forum.dlang.org/post/oyuxvperqmddgndvmlyx@forum.dlang.org