install cgminer on ubuntu 12.04 opencl gpu lightcoin mining

[egork]

http://www.distrogeeks.com/install-cgminer-latest-ubuntu/

last version that supports gpu mining is 3.7.2

git clone https://github.com/ckolivas/cgminer
cd cgminer
git checkout -b v3.7.2

./autogen.sh --enable-scrypt --enable-opencl
sudo make install

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