llvm-module-flag

This flag allows adding a key/value to the !llvm.module.flags metadata in the LLVM-IR for a compiled Rust module. The syntax is

-Z llvm_module_flag=<name>:<type>:<value>:<behavior>

Currently only u32 values are supported but the type is required to be specified for forward compatibility. The behavior element must match one of the named LLVM metadata behaviors