The Intel XDK CLI 5.1.1 build option has been deprecated. It will be retired with our September 2016 release of the Intel XDK. Please upgrade your app to build with CLI 5.4.1 as soon as possible.
In addition, a CLI 6.x build option will be released at or before the retirement of the CLI 5.1.1 build option.
For more complete information about compiler optimizations, see our Optimization Notice.