Hitchikers Guide to Porting Phobos / D Runtime to other architectures

[Dwhatever]

I'm trying to do the same, trying to compile OS free code but I 
haven't so far been successful because D requires the runtime and 
then also Phobos. Compared to C/C++ where you can create pretty 
advanced stand alone code without even include any standard 
libraries, this because much of C++ is part of the compiler.

With D this is not the case. I don't really have a good picture 
what is part of the compiler or the runtime. Even creating a 
simple sample class and create a stack object requires that I 
include *everything*, that hairy runtime phobos nest. The runtime 
also has dependencies into Phobos which I find to be very 
inconvenient and I don't think it is a good idea. The runtime 
should be stand alone and Phobos should depended on the runtime 
and not vice versa.

Also, I am not too happy about the change "scope for allocating 
classes on the stack", 
http://dlang.org/deprecate.html#scope%20for%20allocating%20classes%20on%20the%20stack.

This change requires you to include std.typecons from Phobos, 
which means you have include a library for a simple operation 
like stack allocation. C++ does not require this as it is a part 
of the language.

Compared to C/C++, D is very hard to get to work in the 
embedded/OS less environment because of this.