message: Another M_PI try after "../config/config.hpp"
diff: #ifndef MFEM_BLAS_HPP
  #define MFEM_BLAS_HPP
  +#include "../config/config.hpp"
  #ifdef _WIN32
  #define _USE_MATH_DEFINES
  #include <cmath>
  +//#define M_PI 3.14159265358979323846
  #endif
  -#include "../config/config.hpp"
  -
  #include "../general/globals.hpp"
  #include "../general/forall.hpp"
  #include "matrix.hpp"
  