How to Add an Application to the Mac Approved Software List

I am installing Eclipse on Mac OS X Mountain Lion.  Unpacking the
.tar.gz was no problem, however, when I went to run it for the first
time I got the following error message:

Your security preferences allow installation of only apps from the Mac App Store and identified developers

To add Eclipse to the list of ‘approved’ applications run the following command in a terminal:

xattr -d /path/to/

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