I've just noticed a root directory (/build) which I can't seem to find any information for.
It looks like it's some sort of staging ground for PEAR (PHP). There are only two folders of different php versions in it, and each of those has a few PEAR tar files I've installed (via the PEAR command line).
I'm really only asking this question because I find is strange PEAR (and only PEAR) would create its own root directory to store files. Is this normal? Does Ubuntu provide a /build directory for applications to use?