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llvm-project/clang/test/Frontend/unknown-arg.c

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[Driver] Suggest correctly spelled driver options Summary: Depends on https://reviews.llvm.org/D41732. Utilities such as `opt`, when invoked with arguments that are very nearly spelled correctly, suggest the correctly spelled options: ``` bin/opt -hel opt: Unknown command line argument '-hel'. Try: 'bin/opt -help' opt: Did you mean '-help'? ``` Clang, on the other hand, prior to this commit, does not: ``` bin/clang -hel clang-6.0: error: unknown argument: '-hel' ``` This commit makes use of the new libLLVMOption API from https://reviews.llvm.org/D41732 in order to provide correct suggestions: ``` bin/clang -hel clang-6.0: error: unknown argument: '-hel', did you mean '-help'? ``` Test Plan: `check-clang` Reviewers: yamaguchi, v.g.vassilev, teemperor, ruiu, bruno Reviewed By: bruno Subscribers: bruno, jroelofs, cfe-commits Differential Revision: https://reviews.llvm.org/D41733 llvm-svn: 321917
2018-01-06 08:25:40 +08:00
// RUN: not %clang_cc1 %s -E --helium 2>&1 | \
// RUN: FileCheck %s
// RUN: not %clang_cc1 %s -E --hel[ 2>&1 | \
// RUN: FileCheck %s --check-prefix=DID-YOU-MEAN
// RUN: not %clang %s -E -Xclang --hel[ 2>&1 | \
// RUN: FileCheck %s --check-prefix=DID-YOU-MEAN
// CHECK: error: unknown argument: '--helium'
lld-link, clang: Treat non-existent input files as possible spellos for option flags OptTable treats arguments starting with / that aren't a known option as filenames. This means lld-link's and clang-cl's typo correction for unknown flags didn't do spell checking for misspelled options that start with /. I first tried changing OptTable, but that got pretty messy, see PR41787 comments 2 and 3. Instead, let lld-link's and clang's (including clang-cl's) "file not found" diagnostic check if a non-existent file looks like it could be a mis-spelled option, and if so add a "did you mean" suggestion to the "file not found" diagnostic. While here, make formatting of a few diagnostics a bit more self-consistent. Fixes PR41787. Differential Revision: https://reviews.llvm.org/D62276 llvm-svn: 361518
2019-05-24 01:58:33 +08:00
// DID-YOU-MEAN: error: unknown argument '--hel['; did you mean '--help'?