[Bug c/59520] a possible inconsistency in error diagnostics with "-pedantic -std=c99"

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59520

--- Comment #1 from joseph at codesourcery dot com <joseph at codesourcery dot com> ---
The main concerns for diagnostics in such cases are (a) that they are 
meaningful and (b) that invalid code gets at least one error with 
-pedantic-errors, and at least one warning or error with -pedantic.  
There may be less consistency in what's a warning / error if -pedantic 
rather than -pedantic-errors is used.