gistfile1.txt

g++ -c -std=c++11 -I. main.cpp -lshogun

linalg.cpp

#include <linalg.h>
#include <shogun/lib/SGVector.h>
#include <memory>

namespace shogun
{

template <class T>
struct GPUVector<T>::GPUArray
{
    GPUArray(){}
};

template <class T>
GPUVector<T>::GPUVector(int32_t a) : gpuarray(std::unique_ptr<GPUArray>(new GPUVector<T>::GPUArray()))
{
}

template struct GPUVector<int32_t>;
template struct GPUVector<float64_t>;
}
    
    

linalg.h

#ifndef LINALG_H_
#define LINALG_H_

#include <memory>

namespace shogun
{

template <typename T> class SGVector;

template <typename T>
struct BaseVector
{
};

template <class T>
struct GPUVector : public BaseVector<T>
{
    GPUVector(int32_t a);
private:
    struct GPUArray;
    std::unique_ptr<GPUArray> gpuarray;
};

}

#endif

main.cpp

#include <linalg.h>
using namespace shogun;
int main()
{
    int b = 5;
    GPUVector<int32_t> a_GPU(b);
    return 0;
}