I've been trying to install the C++ armadillo library in a cluster environment for which I don't have neither root nor sudo privileges. So far, I haven't had much success. Following some system admin basic guidelines, the armadillo README file and the instructions provided here, I've arrived to what I understand it is the installation part:
"cmake . -DCMAKE_INSTALL_PREFIX:PATH=<desired directory>
In "desired directory", I've introduced the folder where my codes are located.
Then I did
make
and
make install
and went back to the directory where I had installed armadillo. I tried compiling my code and got the message: "error: armadillo: No such file or directory" My assumption was that the system was simply not seeing the library at all. I was then advised by system admin to change the $LD_LIBRARY_PATH in order for the compiler to know where to look. I proceeded to do so by:
export LD_LIBRARY_PATH=${LD_LIBRARY_PATH}:<desired directory>
only to get the same error again. ("desired directory" is the directory where my codes and library live).
I suspect I might be making some very basic mistake, but that's my first time trying to solve such problems. Therefore, I'd appreciate any help and would be thankful for your patience.
Based on the Questions page from the Armadillo website, one approach is to simply use the -I option to gcc or clang. If you have unpacked armadillo in /home/sergio, the following should do the trick:
g++ prog.cpp -o prog -O2 -I /home/sergio/armadillo-9.100.5/include -DARMA_DONT_USE_WRAPPER -lopenblas -llapack
Change the -lopenblas to -lblas if the machine that you are using doesn't have OpenBLAS installed. (OpenBLAS is a fast version of BLAS).