A fork of clang/llvm is being maintained at https://github.com/jacobly0/llvm-project. I further forked that to switch to targeting binutils (by just changing the emitted assembly syntax a little), which added Z80-family support last year some time. The llvm fork isn't perfect - it produces fairly inefficient and occasionally bizarre code, and has had a few errors in code generation that the fork maintainer has been fast to fix.
I'm not sure how the Zilog tools manage debugging symbols but I would be very surprised if it's from ELF objects with DWARF attributes given the object files in the ZDS distribution appear to be a proprietary derivative of COFF. I'll go out on a limb and say it probably wouldn't work, at least not as far as debugging at the C level, but since the ZDI subsystem doesn't care what compiled the code you should be able to debug machine code with the ZPAK tools. I control the ZDI pins via my USB serial IC, but I've built no support for debug symbols yet. I haven't even tried a debug build. I modified the build process to add an option to switch toolchains but I've wound up needing to duplicate all the assembly files and slightly change their syntax. I can put up a merge request to see if my changes still allow the ZDS-II build to proceed, so I'll do that in the next few days. -- Byron On Fri, Feb 12, 2021 at 9:19 AM Gregory Nutt <spudan...@gmail.com> wrote: > I developed the ez80 and used it in several projects. I was working on > a port when the quarantine lock-down made it impossible to get parts > here in Costa Rica, at least temporarily. I have not gotten back to > working with those ez80 boards for a variety of reasons. > > I really like the ez80's.. lots of retro feel but faster updated so that > you are not stuck in a 16-bit address space. > > I think it is important to continue supporting the official ZiLOG ZDS-II > toolchains, however it would be great to have a clang/llvm alternative. > I was unaware of such a beast. Does it integrate with the ZiLOG tools > for debugger support? > > There are lots of problems with the ZDS-II tools, like C89 and sometimes > unpredictable compiler behavior. But, again, I think that the official > ZiLOG tools should be supported. Other than additional complexity, I > don't think that there is any reason that we could not support both with > the appropriate options in arch/arm/src/ez80/Toolchain.defs and lots of > changes to the build files. > > If you want to attempt such a thing, I could help out at least with some > backward compatibility testing. > > Greg > > On 2/11/2021 5:07 PM, Byron Ellacott wrote: > > Hi all, > > > > I'm wondering if there's anyone building NuttX for the eZ80. I've been > > working on a build of NuttX for a custom eZ80-based board with reasonable > > success so far, but I've made a pretty hefty change: I've switched from > the > > ZDS-II Windows-only toolchain to an unstable fork of clang/llvm targeting > > the eZ80. > > > > If there's little interest in the eZ80, I'll keep my changes on my fork > > rather than attempting to package up the toolchain. If there's no-one > > building with the ZDS-II, I don't think I can reasonably offer merge > > requests either, since I've no way to tell if the problems I've > encountered > > are due to my toolchain or not. > > > > Thanks, > > Byron > > >
