1 // compile-flags: -Cllvm-args=-not-a-real-llvm-arg
2 // normalize-stderr-test "--help" -> "-help"
3 // normalize-stderr-test "\n(\n|.)*" -> ""
5 // I'm seeing "--help" locally, but "-help" in CI, so I'm normalizing it to just "-help".
7 // Note that the rustc-supplied "program name", given when invoking LLVM, is used by LLVM to
8 // generate user-facing error messages and a usage (--help) messages. If the program name is
9 // `rustc`, the usage message in response to `--llvm-args="--help"` starts with:
11 // USAGE: rustc [options]
13 // followed by the list of options not to `rustc` but to `llvm`.
15 // On the other hand, if the program name is set to `rustc -Cllvm-args="..." with`, the usage
16 // message is more clear:
18 // USAGE: rustc -Cllvm-args="..." with [options]
20 // This test captures the effect of the current program name setting on LLVM command line