JohnLangford/vowpal_wabbit — pull request #250 by timcowlishaw (2014-03-04 12:31:22+00:00)
Title: Fix AC_PATH on mac os x with homebrew

by default, homebrew installs into /usr/local, while the autoconfigure script looks in /opt/local for autotools. This commit tests for the existence of an /opt/local directory, then falls back onto /usr/local if none is found.