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I just ran the Xcode 4.6 update, and now my project will not compile. I had to fix several C++ errors, but one of my C++ files is still getting this one Use of undeclared identifier 'arc4random'.
Note that arc4random() works elsewhere in the project just fine. (Even in other C++ files!)
I’ve tried changing it to arc4random_uniform(1), but that doesn’t help.
Thanks for reading.
You need to
#include <stdlib.h>.