There are several ways for CMake installation from source. I tried to install CMake 2.8.12.2 from source using pre-installed CMake 2.8.7 but it failed.
#!/bin/bash
wget http://www.cmake.org/files/v2.8/cmake-2.8.12.2.tar.gz tar zxvf cmake-2.8.12.2.tar.gz cd cmake-2.8.12.2 ./bootstrap --prefix=/usr/local --qt-gui 2>&1 | tee Cmake2.8.12.2bootstrap.log make 2>&1 | tee Cmake2.8.12.2Make.log sudo make install 2>&1 | tee Cmake2.8.12.2MakeInstall.log
