In D70401#4205333, @pcwang-thead wrote:

In D70401#4204511, @recallmenot wrote:

Hi, I'm working on CH32V003 for rust and it uses RV32EC core.
I tried replacing my distros llvm and clang with a patched version of this like this:

git clone https://aur.archlinux.org/llvm-git.git
cd llvm-git
mkdir src
cd src
git clone https://github.com/llvm/llvm-project.git
cd llvm-project
arc patch D70401
cd ../..
mv llvm-config.h src/
makepkg -es
sudo pacman -Rd --nodeps clang llvm
makepkg -eid

but that bricked my xfce-wayland-manjaro DE (one screen black)
And in config.toml if I put

[build]
target = "riscv32i-unknown-none-elf"
rustflags = [
	"-C", "target-feature=+e,+c"
]

then build with cargo build
LLVM still complains it doesn't implement CodeGen for RV32E yet
What am I doing wrong?
Ended up reverting to repository llvm and clang, desktop now works again but CodeGen is obviously missing.

I don't see any obvious problem here.
I am not familiar with rust. Is riscv32i-unknown-none-elf a valid target for rustc, it should be something like riscv32-unknown-elf in LLVM I think. And is target-feature=+e,+c the right way to specify features?
Can you please provide the whole command/arguments passed to LLVM?

Hi, I'm working on CH32V003 for rust and it uses RV32EC core.
I tried replacing my distros llvm and clang with a patched version of this like this: