Change registered "program name" for -Cllvm-args usage messages #75471
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rust-highfive
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---- [ui] ui/unknown-llvm-arg.rs stdout ----
diff of stderr:
- rustc -Cllvm-args="..." with: Unknown command line argument '-not-a-real-llvm-arg'. Try: 'rustc -Cllvm-args="..." with --help'
+ rustc -Cllvm-args="..." with: Unknown command line argument '-not-a-real-llvm-arg'. Try: 'rustc -Cllvm-args="..." with -help'I generated the stderr file with --bless, and on my local machine, the message includes 2 dashes for "--help", but apparently CI's "llvm" is different. I'll normalize this. |
While debugging a codegen issue, I tried adding LLVM options with the rustc -Cllvm-args option, and was confused by the error and usage messaging. The LLVM "program name" argument is set to "rustc", and command line error messages make it look like invalid arguments are "rustc" arguments, not LLVM. I changed this argument so error messages and the "-help" usage feedback is easier to understand and react to. (Clang does something similar.)
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wesleywiser
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Aug 13, 2020
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@bors r+ |
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Rollup of 12 pull requests Successful merges: - rust-lang#74650 (Correctly parse `{} && false` in tail expression) - rust-lang#75319 (Fix ICE rust-lang#75307 in `format`) - rust-lang#75417 (Don't spill operands onto the stack in naked functions) - rust-lang#75452 (self-profile: Cache more query key strings when doing self-profiling.) - rust-lang#75459 (fix LocalInfo doc comment) - rust-lang#75462 (Remove unused tcx parameter) - rust-lang#75467 (Fix E0741 error code explanation) - rust-lang#75471 (Change registered "program name" for -Cllvm-args usage messages) - rust-lang#75477 (Expand function pointer docs) - rust-lang#75479 (make rustc-docs component available to rustup) - rust-lang#75496 (Prioritization WG: Open Zulip topics only for `I-prioritize` issues) - rust-lang#75500 (Disable zlib in LLVM on aarch64-apple-darwin) Failed merges: r? @ghost
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While debugging a codegen issue, I tried adding LLVM options with
the rustc -Cllvm-args option, and was confused by the error and usage
messaging.
The LLVM "program name" argument is set to "rustc", and command line
error messages make it look like invalid arguments are "rustc"
arguments, not LLVM.
I changed this argument so error messages and the "-help" usage feedback
is easier to understand and react to. (Clang does something similar.)
r? @wesleywiser