blitzpp/blitz

Blitz++ Multi-Dimensional Array Library for C++

IMPORTANT NOTICE

Blitz++ written for the C++98 standard, and is not able to make use of the substantial benefits that came with C++11. Although it works as well as ever, as of 2024, Blitz++ is thoroughly obsolete, which results in a number of annoyances when using it in modern C++ code.

In the meantime, Fortran-90 / NumPy style arrays have received high-level thought in the C++ Standards community, resulting in std::mdspan. I highly recommend anyone starting a new project to consider this alternative before using Blitz++. MDSpan is part of C++23 and in theory should be supported by popular compilers "out of the box." If your C++ compiler does not (yet) support MDSpan, I would try using the publicly available Reference Implemenation. Here is more information on MDSpan:

• https://en.cppreference.com/w/cpp/container/mdspan
• https://www.studyplan.dev/pro-cpp/mdspan
• https://www.osti.gov/servlets/purl/1646434

Blitz++ has not received new features for many years, and will not going forward either. However, it is likely to be required for many years by a number of existing projects, and is provided here for users and developers of those projects.

Overview

Blitz++ is a C++ template class library that provides high-performance multidimensional array containers for scientific computing.

Blitz++ has gone through some changes in location:

1. The original Blitz++ website was located at http://oonumerics.org/blitz (archived at http://www.math.unipd.it/~michela/OP.htm).

2. Blitz++ then moved to SourceForge, at http://www.sourceforge.net/projects/blitz.

3. The latest maintained version of Blitz++ is now on GitHub, at https://github.com/blitzpp/blitz

Diverse information on Blitz++ is now being catalogued at the GitHub wiki: http://github.com/blitzpp/blitz/wiki/

Licensing information is detailed in the LEGAL file. Summary: you can do anything except sell this library in source form. Blitz is licensed under either the Lesser GPL version 3 license (see COPYING and COPYING.LESSER), the BSD license (see COPYRIGHT), and the less restrictive Perl "artistic license" version 2.0 (see LICENSE).

Blitz++ uses CMake for build, test and installation automation. For details on using CMake consult https://cmake.org/documentation/ In short, the following steps should work on UNIX-like systems:

  mkdir build
  cd build
  cmake ..
  make lib
  sudo make install

On Windows try:

  md build
  cd build
  cmake ..
  cmake --build . --config Release
  cmake --build . --target install