[cfarm-users] Is there a list of funny C compilers?

[Jing Luo]

On 2025-04-22 18:31, Martin Guy via cfarm-users wrote:
> Hi again.
> 
>   Porting something dependent on compiler internals, I wondered if 
> there is (or if anyone has compiled) a list of compilers other than gcc 
> and clang available on the compile farm and where they are.

Not sure if this one is "funny", but the OPENPOWER firmware buildsys 
pulls an ancient version of customized gcc [1] and binutils [2]. It has 
little to no documentation on what was changed by IBM. According to [3], 
IIUC, this toolchain is used to build a zero-stage bootloader SBE which 
starts the first-stage bootloader Hostboot on POWER9, so its use is very 
limited.

And then there is a riscv vendor toolchain that is general purpose but 
may be funny [4]. IIRC anything it builds is not portable, and cfarm 
doesn't have any host with a thead CPU (infamous for the Ghostwrite 
vulnerability).

Finally I also found a "we-violate-the-GPL-because-we-don't-care" 
compiler [5], a sourceless, prebuilt and customized gnu toolchain by 
Spacemit with "--build=x86_64-linux-gnu --host=riscv64-linux-gnu", which 
is linked from [6]. This one deserves a ((dis)honorary) mention because 
cfarm95 runs on the Spacemit CPU.


[1] https://github.com/open-power/ppe42-gcc
[2] https://github.com/open-power/ppe42-binutils
[3] https://wiki.raptorcs.com/wiki/Self-Boot_Engine
[4] https://github.com/XUANTIE-RV/xuantie-gnu-toolchain
[5] https://archive.spacemit.com/toolchain/
[6] https://milkv.io/docs/jupiter/development-guide/kernel-compilation


-- 
Jing Luo
About me: https://jing.rocks/about/
GPG Fingerprint: 4E09 8D19 00AA 3F72 1899 2614 09B3 316E 13A1 1EFC
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