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+CMAKE_INSTALL_PREFIX
+--------------------
+
+Install directory used by install.
+
+If "make install" is invoked or INSTALL is built, this directory is
+prepended onto all install directories. This variable defaults to
+/usr/local on UNIX and c:/Program Files on Windows.
+
+On UNIX one can use the DESTDIR mechanism in order to relocate the
+whole installation. DESTDIR means DESTination DIRectory. It is
+commonly used by makefile users in order to install software at
+non-default location. It is usually invoked like this:
+
+::
+
+ make DESTDIR=/home/john install
+
+which will install the concerned software using the installation
+prefix, e.g. "/usr/local" prepended with the DESTDIR value which
+finally gives "/home/john/usr/local".
+
+WARNING: DESTDIR may not be used on Windows because installation
+prefix usually contains a drive letter like in "C:/Program Files"
+which cannot be prepended with some other prefix.
+
+The installation prefix is also added to CMAKE_SYSTEM_PREFIX_PATH so
+that find_package, find_program, find_library, find_path, and
+find_file will search the prefix for other software.