[Bug c/47901] -Wall should not imply -Wformat-zero-length by default

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47901

--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2012-04-23 19:58:15 UTC ---
There are plenty of warnings in -Wall that relate to things that are 
unusual but may be OK in some cases, or where -Wall expects a particular 
coding style to be used.  I think -Wformat-zero-length falls into the 
category of pointing out something that might be OK but is likely not to 
be intended.  So I think it's fine in -Wall - but if a subset of format 
checking warnings were enabled by default (as in Ubuntu, for example) then 
maybe that default subset would not include this one.