<p>According to the CMake documentation, CMAKE_INSTALL_PREFIX "defaults to /usr/local on UNIX and c:/Program Files on Windows."  (source: <a href="http://www.cmake.org/cmake/help/v3.0/variable/CMAKE_INSTALL_PREFIX.html#variable:CMAKE_INSTALL_PREFIX">http://www.cmake.org/cmake/help/v3.0/variable/CMAKE_INSTALL_PREFIX.html#variable:CMAKE_INSTALL_PREFIX</a>, and the same applies for CMake 2.8 also.)</p>

<p>So this is correct, and I'll change other references accordingly too.</p>

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