How to use Armadillo on Windows

Armadillo is a C++ template library for linear algebra. It is built upon LAPACK and BLAS. It offers a simple API that is similar to that of Matlab.

1. Download the source code of Armadillo from here. Unzip the source code of Armadillo to a directory.

2. Create an environment variable named ARMADILLO_ROOT with a value of the Armadillo directory.

3. Armadillo requires LAPACK and BLAS libraries for any non-trivial matrix operation. To enable it to use these libraries, open $(ARMADILLO_ROOT)/include/armadillo_bits/config.hpp and uncomment the defines of ARMA_USE_LAPACK and ARMA_USE_BLAS.

4. To use Armadillo in your Visual C++ project, add $(ARMADILLO_ROOT)/include as an Include directory.

5. Since Armadillo source code uses LAPACK and BLAS, your project needs to link with these libraries. Armadillo ships with pre-built 32-bit .lib and .dll files for LAPACK and BLAS. Add $(ARMADILLO_ROOT)/examples/lib_win32 as Library directory to your project. Add blas_win32_MT.lib and lapack_win32_MT.lib as additional dependencies to your project.

6. Include the armadillo header file in your source code. Use the Armadillo classes and methods in your code. Remember to use the namespace arma:: Your code should compile to an EXE file without any further problems.

7. Copy the blas_win32_MT.dll and lapack_win32_MT.dll files from $(ARMADILLO_ROOT)/examples/lib_win32 to the directory that contains your EXE file. Your program should execute successfully now.

Tried with: Armadillo 3.920.2 and Visual Studio 2010

2 thoughts on “How to use Armadillo on Windows

  1. thanks for the article, I followed the instructions and tested a simple 2 matrices multiplication program and it worked fine

  2. Hi,
    Is there a trick to get this working on Eclipse IDE? I followed your instructions but Eclipse does not seem to recognize the armadillo file. I can see the armadillo_bits in my includes but not the header.
    When I try to #include , it says no such file or directory found.


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