File: main.c

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cmake 4.2.1-2
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#include <assert.h>
#include <stdint.h>
#include <string.h>

#if BLA_SIZEOF_INTEGER == 4
typedef int32_t blas_int;
#elif BLA_SIZEOF_INTEGER == 8
typedef int64_t blas_int;
#else
#  error BLA_SIZEOF_INTEGER is not declared!
#endif

// declare what parts of the lapack C-API we need
void dgesv_(blas_int*, blas_int*, double*, blas_int*, blas_int*, double*,
            blas_int*, blas_int*);

int main(void)
{
  double A[8] = {
    0, 1, 2, 3, 4, 5, 6, 7,
  };
  double B[2] = { 0, 5 };
  blas_int ipiv[2] = { 0, 0 };
  blas_int info = 0;

  blas_int dim = 2;
  blas_int numCols = 1;
  dgesv_(&dim, &numCols, A, &dim, ipiv, B, &dim, &info);
  return 0;
}