env.cxx: Modernize with C++11 features.
env.cxx: Modernize with C++11 features.

ccpaging/log4cplus,csuideal/log4cplus,csuideal/log4cplus,ccpaging/log4cplus,csuideal/log4cplus,ccpaging/log4cplus,ccpaging/log4cplus,csuideal/log4cplus