[Bug libgdiagnostics/118769] New: Provide better location information for diagnostics with -Wattributes

[gjl at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118769

            Bug ID: 118769
           Summary: Provide better location information for diagnostics
                    with -Wattributes
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgdiagnostics
          Assignee: dmalcolm at gcc dot gnu.org
          Reporter: gjl at gcc dot gnu.org
  Target Milestone: ---

Compiling the following code with v15

__attribute__((xxx))
void my4 () {}

I am getting the following diagnostic:

file.c:2:1: warning: 'xxx' attribute directive ignored [-Wattributes]
    2 | void my4 () {}
      | ^~~~

There in nothing wrong with "void".  IMHO the diagnostic should point to the
unrecognized attribute. Or with:

__attribute__((used(10)))
void my5 () {}

file.c:2:1: error: wrong number of arguments specified for 'used' attribute
    2 | void my5 () {}
      | ^~~~
file.c:2:1: note: expected 0, found 1