[LLVMbugs] [Bug 13169] New: Clang driver warning: argument unused during compilation: '-fixit'

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=13169

             Bug #: 13169
           Summary: Clang driver warning: argument unused during
                    compilation: '-fixit'
           Product: clang
           Version: trunk
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: Driver
        AssignedTo: unassignedclangbugs at nondot.org
        ReportedBy: rikka at google.com
                CC: llvmbugs at cs.uiuc.edu
    Classification: Unclassified


As of r158931 clang complains about -fixit and friends being unused instead of
passing them to the "clang -cc1" invocation, despite mentioning them in the
help text:

$ ./bin/clang --help
OVERVIEW: clang "gcc-compatible" driver

USAGE: clang-3 [options] <inputs>

OPTIONS:
...
  -fgnu89-inline          Use the gnu89 inline semantics
  -fhidden-weak-vtables   Generate weak vtables and RTTI with hidden visibility
  -finstrument-functions  Generate calls to instrument function entry and exit
  -fix-only-warnings      Apply fix-it advice only for warnings, not errors
  -fix-what-you-can       Apply fix-it advice even in the presence of unfixable
errors
  -fixit-recompile        Apply fix-it changes and recompile
  -fixit-to-temporary     Apply fix-it changes to temporary files
  -fixit=<value>          Apply fix-it advice creating a file with the given
suffix
  -fixit                  Apply fix-it advice to the input source
  -flimit-debug-info      Limit debug information produced to reduce size of
debug binary
...

$ cat foo.c
unsinged x = 0U;

$ ./bin/clang -fixit -fix-what-you-can foo.c
clang-3: warning: argument unused during compilation: '-fixit'
clang-3: warning: argument unused during compilation: '-fix-what-you-can'
foo.c:1:1: error: unknown type name 'unsinged'; did you mean 'unsigned'?
unsinged x = 0U;
^~~~~~~~
unsigned
1 error generated.
$ cat foo.c
unsinged x = 0U;

$ ./bin/clang -cc1 -fixit -fix-what-you-can foo.c
foo.c:1:1: error: unknown type name 'unsinged'; did you mean 'unsigned'?
unsinged x = 0U;
^~~~~~~~
unsigned
foo.c:1:1: note: FIX-IT applied suggested code changes
1 error generated.
$ cat foo.c
unsigned x = 0U;

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