devkitARM r32 is needed for lots of ARM applications, including compiling new cIOS or other IOS-related applications.
The original binaries for devkitARM r32 cannot be downloaded anymore (except for the Windows build from my archive at https://wii.leseratte10.de), thus I am providing these Dockerfiles that run on Debian (squeeze, wheezy, jessie, stretch, buster, bullseye), and Ubuntu (Xenial, Bionic, Focal, Hirsute, Impish, Jammy).
The Dockerfiles then compile a working devkitARM r32 for that particular distribution.
Check out this wiki page if you want to compile devkitARM r32 yourself.