I found the source code repositry here, but there was no link to it under the "compilers and languages section". Is anyone here using it?

It does seem to be in active development, or at least maintenance - if anyone can say that it's in a working condition I think it would be good to include it in the reference section here.

Edit: note repo is now here:
https://github.com/itszor/gcc-6502
https://github.com/itszor/gcc-6502-bits
Maybe you need this branch
https://github.com/itszor/gcc-6502/tree/m65x-gcc8
or maybe this older one
https://github.com/itszor/gcc-6502/tree/m65x-gcc6-virt

Edit: see also previously
viewtopic.php?f=2&t=2937

I found install instructions here, so it looks like its working.

I think that's just a mirror... but I do see there's a small 6502 simulator inside the project, which makes it even more interesting!

The CRTC demo group use it in their BBC demos, e.g. this one.

Ah, thanks, that's the vote of confidence we need! Added the link to Compilers and Languages.

Wh wh wh .... WHAAAAT ?!?

I tough GCC was not portable to 8-bit systems for technical reasons. I will have to check this out, even if it is in a buggy/alpha stage. On which version of GCC is is based on ? They changed from 4.9 in last year to 6.something this year, and a lot of major changes were made to the project, but I didn't find time to investigate them yet.

Seems to be 6.0.0 (which is a pleasant surprise - I might have thought it would be ancient)

A bit of a struggle, but I've managed to build it!

That's on ubuntu 14.04, 64bit version for x86.

And helloworld.c
runs as advertised:


(Edit: extra steps needed were as follows
- installing flex and cc65
- putting cc65 on the path and also editing the path in a wrapper script
- changing the build script to note ar65's location
- changing the build script to allow multiple builds without a clean start, as I needed to run multiple makes for some reason
)

Ok, so I'm downloading it right now, but it's HUUGE (1gb). Also I am worried by the complete lack of any instructions or doccumentaiton whatsoever, and I do not recognize the traditional gcc folders. Where are binutils, cpp, etc... ? Or maybe it just changed a lot since gcc 4.8, last time I compiled it myself.

Be sure to get the auxiliary project too. I got this one as a git clone, but gave up with git cloning the main project, as it was quicker to get the zip file.
https://github.com/puppeh/gcc-6502-bits
https://github.com/puppeh/gcc-6502

The instructions are in the auxiliary project.

What clib is the GCC tool chain linking too?

I think this one, in the auxiliary project:
https://github.com/puppeh/gcc-6502-bits ... r/libtinyc

So, you are required to have CC65 in order to compile it. How does this make any sense at all ?

I don't know exactly what cc65 is used for in the build, but I don't think it's too unexpected. It might be that with some juggling the newly built gcc could be used for whatever it is, but I can vaguely imagine there might be some chicken and egg difficulty. It's already a two-stage bootstrap.