> I've got some code written by someone else, which has > > g++ -W -Wall foobar.cc > > gcc is not indicting -W is an unknown option. The gcc documentation says > -w > (lower case) is to suppress all warnings, but I can't find -W (upper case) > documented. The index gets you to http://gcc.gnu.org/onlinedocs/gcc-4.5.1/gcc/Warning-Options.html#index-W-236 -Wextra This enables some extra warning flags that are not enabled by -Wall. (This option used to be called -W. The older name is still supported, but the newer name is more descriptive.) Most people still use -W, it's so nice and short ;-) Segher
