Where is blas installed

Connect and share knowledge within a single location that is structured and easy to search. I'm working on Ubuntu I'm trying to compile my code example. F90 using gfortran with a following command:.

However it does not work, the compiler returns:. Moreover it just moves the problem to another place bacause I still need to import somehow procedures from BLAS. Unfortunately I don't really know how does use command work, so I don't know what should I try to change. Maybe my compiler just don't know where -llapack and -lblas libraries are. I was trying trying to write it explicitly using. I don't know what are exactly -llapack and -lblas flags and it makes me difficult to check if the compiler 'can see' them.

I've actually found out that I should create those. First two of them I've just added to my code as modules and the gfortan compiler creates proper I hope. However the third one is written in C language, so I can't just put it into my code. So now the question is how to bound the. Do I need to create some makefile or compile. What I have should done was:. GNU file to use gfortran as a compiler. You are not just using the simple usual BLAS that most tutorials, questions and answers speak about.

You are actually using the modern Fortran interfaces using modules. Most compilers use. In gfortran you do that using -Ipath where path is the path to those. By default, SystemML implements all its matrix operations in Java. This simplifies deployment especially in a distributed environment. Other possible options are: mkl , openblas and none. The first two options will only attempt to use the respective BLAS libraries. Download and install the community version of Intel MKL.

Intel requires you to first register your email address and then sends the download link to your email address with license key. So, instead we recommend that you compile OpenBLAS from the source instead of installing it with yum or apt-get. To find the location of gomp on your system, please use the command ldconfig -p grep libgomp. Alternatively, you can add the location of the native libraries i. If you want to use SystemML with Spark, please add the following line to spark-env.

For example:. The configuration property sysml. Therefore, including -lblas in compilation is equivalente to compiling libblas. As just mentioned, the correct way to link a static library i. Also see an article on their differences article-shared-static.

Also the order matters. The linker processes its input files in the order in which they appear on the command line — left to right. See article. Navigation index next previous AMS , Spring 0. Fortran ». BLAS installation: 2. Testing: Previous topic Fortran debugging Next topic Chapter 3. Quick search. D: double precision!!

GE: general type of matrix!! SV: simple driver by factoring A and overwriting B with the solution x!!