Cannot link to existing libopenblas.so.0 DLL - c++

Question

I need to use the libpca in C++, which depends on Armadillo, which in turn requires OpenBlas and lapack.
I got some problems in installing/configuring these dependencies.
I am using Red Hat 4.8.5-16 and wish to write code and call the package in /my/dir/program/. I do NOT have sudo privilege.
All those packages are downloaded and unzipped in /my/dir/
Here is the steps I have followed:
1. to install OpenBlas
/my/dir/OpenBLAS-0.2.20$ make
/my/dir/OpenBLAS-0.2.20$ make PREFIX=/my/dir/program/
<Step 1 is successful>
2. to install lapack
/my/dir/lapack-3.8.0$ mv make.inc.example make.inc
/my/dir/lapack-3.8.0$ make
<Step 2 is successful>
3. to install Armadillo
/my/dir/armadillo-8.500.0$ cmake . -DCMAKE_INSTALL_PREFIX:PATH=/my/dir/pgrogram/
/my/dir/armadillo-8.500.0$ make
/my/dir/armadillo-8.500.0$ make install
<Step 3 is successful>
4. to compile the example code
/my/dir/armadillo-8.500.0$ cp examples/example1.cpp /my/dir/program
/my/dir/program$ export LD_LIBRARY_PATH=/opt/intel/mkl/lib/intel64/:../OpenBLAS-0.2.20/:../armadillo-8.500.0/:./lib/:./lib64/:$LD_LIBRARY_PATH ;
/my/dir/program$ g++ example1.cpp -o example1 -O2 -I./include -L./lib -L./lib64 -L../lapack-3.8.0 -L../OpenBLAS-0.2.20 -larmadillo -lopenblas -llapack ;
<There is no warning or error in compiling>
5. to run the example code
/my/dir/program$ export LD_LIBRARY_PATH=/opt/intel/mkl/lib/intel64/:../OpenBLAS-0.2.20/:../armadillo-8.500.0/:./lib/:./lib64/:$LD_LIBRARY_PATH ;
/my/dir/program$ ./example1
It returns
./example1: error while loading shared libraries: libopenblas.so.0: cannot
open shared object file: No such file or directory
Actually the libopenblas.so.0 dll is located in ./lib/, and I've already added the DLL path.
Since I do not have root privilege, I cannot yum install openblas.x86_64 openblas-devel.x86_64 as suggested by this post.
What should I do?

Answer 1

For g++ / ld to find libmkl_rt.so is one thing.
Running ./example1 is a new situation : The "location information" must be repeated →
export LD_LIBRARY_PATH=/opt/intel.. .. ...:$LD_LIBRARY_PATH && ./example1
Please be aware that the export command is temporary : Valid for the current shell session only. When you exit the shell, the command is cancelled.