GCC Goes Ahead With ARM64 ILP32 Deprecation

Title says it all really.

https://www.phoronix.com/news/GCC-Deprecates-ARM64-ILP32

Some context from that article:

As summed up in the prior article, ARM64 ILP32 is a 32-bit ABI for Armv8 akin to the x32 efforts in the x86_64 world from a number of years ago. But the mainline Linux kernel and GNU C Library never ended up seeing mainline ILP32 support and the GCC compiler support for this 32-bit ABI has been of very limited use.

ILP32 is ARM64 with 32 bit pointers, ints and longs.

from https://wiki.debian.org/Arm64ilp32Port :

It gives exactly the same functionality as existing 32-bit ARM, but using the v8 instruction set. This is significant on arm cores that only support v8, such as the Cavium ThunderX, where you also have software that is not 64-bit-safe.

The relevance to RISC OS is that you could use ILP32 to port it to ARMv8 without having to redesign RISC OS to handle 64 bit memory. It’s practically a 1:1 translation of ARMv7 opcodes, which makes it easier to do translation of code which can’t be recompiled, and would run at comparable speeds to native 64 bit code.