CXXBLAS

Introduction

C++ (header-only) templated wrappers around CBLAS/LAPACKE.

Tested with OpenBLAS on Linux and Accelerate on macOS.

Example usage

scale.cpp:

#include "cxxblas.h"
#include <complex>
#include <vector>
#include <iostream>

template<class T>
void pvec(const std::vector<T>& v)
{
  std::cout << "[";
  for(const auto &e : v)
    std::cout << e << " ";
  std::cout << "]" << std::endl;
}

int main(int argc, char* argv[])
{
  int n = 10;
  std::vector<std::complex<double>> x(n, {0.0, 1.0});

  pvec(x);

  cxxblas::scale(5.0, x);
  
  pvec(x);

  return 0;
}

CMakeLists.txt:

cmake_minimum_required(VERSION 3.6)
project(meff)

# Or wherever cxxblas cmake directory is to be found
set(CMAKE_MODULE_PATH "${CMAKE_CURRENT_SOURCE_DIR}/cxxblas/cmake")
include(CXXBLAS)

add_executable(scale scale.cpp)
target_link_libraries(scale ${CXXBLAS_LIBRARIES})

Output:

[(0,1) (0,1) (0,1) (0,1) (0,1) (0,1) (0,1) (0,1) (0,1) (0,1) ]
[(0,5) (0,5) (0,5) (0,5) (0,5) (0,5) (0,5) (0,5) (0,5) (0,5) ]