LLVM for ARM cortex -M4

[Shivam]

@aruna

Which flags I need to use while building LLVM in order to achieve this?

See the documentation How To Cross-Compile Clang/LLVM using Clang/LLVM — LLVM 18.0.0git documentation, Download the requirements, and proceed with the steps.

@aruna

I want to generate LLVM IR for ARM cortex M4.

See Cross-compilation using Clang — Clang 18.0.0git documentation to know cross compilation issues.

So if you look at clang driver testing you can find the commands that you need to run.

llvm/llvm-project/blob/e547b1e2431f9b6175470ff703cf6e1988031cda/clang/test/Driver/arm-cortex-cpus.c#L608

Short answer --target & --mcpu flag is used, also substitute the command according to your system setup.

Correct me if you find something wrong, As I didn’t it try myself.