How to emit LLVM-IR from Cargo

Question

How can I get cargo to emit LLVM-IR instead of a binary for my project? I know that you can use the --emit=llvm-ir flag in rustc, but I've read some Github issues that show it's impossible to pass arbitrary compiler flags to cargo.

Is there any way I can get cargo to emit LLVM-IR directly?

Answer 1

There is cargo rustc to pass arbitrary compiler flags through Cargo to rustc. So I think:

cargo rustc -- --emit=llvm-ir

is what you want!