Could NOT find GFlags (missing: GFLAGS_INCLUDE_DIR GFLAGS_LIBRARY)

You have to install missing dependencies (gflags).

Fedora/RHEL/CentOS: sudo yum install gflags-devel

Ubuntu: sudo apt-get install libgflags-dev

There are also instructions for other dependencies:

Fedora/RHEL/CentOS :http://caffe.berkeleyvision.org/install_yum.html

Ubuntu: http://caffe.berkeleyvision.org/install_apt.html

To install missing gflag dependencies

wget https://github.com/schuhschuh/gflags/archive/master.zip
unzip master.zip
cd gflags-master
mkdir build && cd build
export CXXFLAGS="-fPIC" && cmake .. && make VERBOSE=1
make 
sudo make install

From: Caffe compilation fails: make: ***