D at 8-bit platform - some experiences

[Dukc]

On Friday, 7 July 2023 at 19:02:58 UTC, kinke wrote:
> On Thursday, 6 July 2023 at 17:18:26 UTC, Dukc wrote:
>> Note that I don't use `-Oz`. For some reason that tries to 
>> link to GCC-defined function that isn't in my GCC library 
>> (maybe I have a GCC version mismatch).
>
> You might likely need the LLVM `builtins` compiler-rt library 
> (built for avr obviously, and the version matching the LLVM 
> version LDC was linked against): 
> https://github.com/llvm/llvm-project/tree/main/compiler-rt/lib/builtins. [There's an `avr` subdirectory.]

Very likely. At least the names of the functions there read 
familiar.

Didn't know there's such a library at LLVM - thanks! I thought 
they all are at libGCC and LLVM would only emit calls to them. 
Now when I think of it it wouldn't have made sense though since 
avr-gcc is supposedly only used for linking, not as a runtime 
provider.