On 27 September 2010 05:19, J Decker <d3c...@gmail.com> wrote: > > I don't know why standards left this open, other than there isn't a > single-instruction translation from code to CPU for the comparison; > > But if it's not fixed, this warning should definatly be issued at > default warning level. This should be more like 'if this comparison > can be wrong, it will be wrong'.
Please, see http://c-faq.com/expr/preservingrules.html The warnings that you want are Wsign-compare and Wsign-conversion. They are not enabled by default because they produce a lot of false positives: http://gcc.gnu.org/wiki/NewWconversion#Frequently_Asked_Questions Cheers, Manuel.
