libmozjs185-dev 1.8.5-1.0.0-0ubuntu6 (armhf binary) in ubuntu precise

 SpiderMonkey is the code-name for the Mozilla's C implementation of
 JavaScript. It is intended to be embedded in other applications
 that provide host environments for JavaScript.
 .
 This package contains the header files and static library which is
 needed for developing Spidermonkey embedders.