use gcc-4.2 on OS X 10.5, or clang on Xcode 4
use gcc-4.2 on OS X 10.5, or clang on Xcode 4

dch/factor,dch/factor,mrjbq7/factor,bjourne/factor,AlexIljin/factor,sarvex/factor-lang,slavapestov/factor,dch/factor,bpollack/factor,bjourne/factor,mrjbq7/factor,AlexIljin/factor,AlexIljin/factor,factor/factor,dch/factor,bpollack/factor,bpollack/factor,bjourne/factor,sarvex/factor-lang,mrjbq7/factor,bpollack/factor,AlexIljin/factor,nicolas-p/factor,AlexIljin/factor,slavapestov/factor,bpollack/factor,factor/factor,AlexIljin/factor,tgunr/factor,bjourne/factor,sarvex/factor-lang,dch/factor,nicolas-p/factor,nicolas-p/factor,bjourne/factor,mrjbq7/factor,bjourne/factor,sarvex/factor-lang,bpollack/factor,nicolas-p/factor,slavapestov/factor,nicolas-p/factor,mrjbq7/factor,factor/factor,slavapestov/factor,AlexIljin/factor,bjourne/factor,sarvex/factor-lang,nicolas-p/factor,factor/factor,slavapestov/factor,tgunr/factor,bpollack/factor,tgunr/factor,nicolas-p/factor,slavapestov/factor,tgunr/factor,sarvex/factor-lang,tgunr/factor,factor/factor,sarvex/factor-lang,dch/factor,factor/factor,mrjbq7/factor,slavapestov/factor,tgunr/factor