Use c++11 for -std option by default
Use getEnv instead of lookupEnv
Add pnacl target for building PNaCl library
Use assert instead of BOOST_ASSERT
Add build requirements
Implement allocAligned for PNaCl
Remove unused constant kDefaultAlignment
Remove unused classes StaticLibrary and StaticLoader
Don't compile unused module Loader
PNaCl: Use std::atomic for boost::lockfree
Update stir
Fix compiler warning
Fix compiler warnings
Build: Don't link test against libdl on Linux
Build: Add pnacl-test target
Add macros for turning off (some) compiler warnings
Resolve overloaded function ambiguity
Abstract from shared_ptr implementation

Use boost::shared_ptr for NaCl.
Use std::atomic on NaCl
Remove deprecated Option type and Engine constructor