One Quickie
Treat warnings as errors (Xcode->General)In Xcode, there's a handy "Treat Warnings as Errors" checkbox. I usually use the search dealie with "werr" to find the setting.(In Project Builder, open the Targets tab, double-click the target, go to the "Build Settings" tab, scroll down to Build Settings, look for
WARNING_CFLAGS. Edit that, and add-Werrorto what's already there.)