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in reply to Re^2: Can anybody get CPAN JavaScript libraries to build?
in thread Can anybody get CPAN JavaScript libraries to build?

If you go https://developer.mozilla.org/en-US/docs/SpiderMonkey and get http://ftp.mozilla.org/pub/mozilla.org/js/mozjs17.0.0.tar.gz its there mozjs2013\mozjs17.0.0\js\src\jsapi.h

So if installed binaries and they're missing jsapi.h you probably didn't install the dev/development libraries ...