Search code examples
c++visual-studiovcpkg

unresolved external symbol while loading HDF5 library via vcpkg to C++ vscode project

I am using visual studio project 2019- and vcpkg in order to load data to CUDA 11.6 C++ visual studio project.
at the begining of the file i have :

// #define H5_BUILT_AS_DYNAMIC_LIB 
#include <H5Cpp.h>

and it do not give any errors - so I assume it was correctly loaded and integrated by by vcpkg. Also as visible at the end of the post H5 files are visible in external dependencies list of a solution explorer.

simple code that leads to error is shown below

    H5::H5File file(FILE_NAME, H5F_ACC_RDONLY);
    H5::DataSet dset = file.openDataSet(DATASET_NAME);

error (set of unresolved external symbol errors) - it appears in compile time. enter image description here

If I will uncomment #define H5_BUILT_AS_DYNAMIC_LIB 1 the error discussed above disappears but new shows (in runtime) -

hdf5_cpp_D.dll not found ...

Exactly the same code worked perfectly well on my cmake CUDA C++ project, but for various reasons I need to switch to visual studio project.

Minimal example giving error

#include "cuda_runtime.h"
#include "device_launch_parameters.h"
//#define H5_BUILT_AS_DYNAMIC_LIB 1
#include <H5Cpp.h>
#include <stdio.h>





void loadHDFIntoBoolArr(H5std_string FILE_NAME, H5std_string DATASET_NAME, bool*& data) {


    H5::H5File file(FILE_NAME, H5F_ACC_RDONLY);
    H5::DataSet dset = file.openDataSet(DATASET_NAME);
    /*
     * Get the class of the datatype that is used by the dataset.
     */
    H5T_class_t type_class = dset.getTypeClass();
    H5::DataSpace dspace = dset.getSpace();
    int rank = dspace.getSimpleExtentNdims();


    hsize_t dims[2];
    rank = dspace.getSimpleExtentDims(dims, NULL); // rank = 1
    printf("Datasize: %d \n ", dims[0]); // this is the correct number of values

     // Define the memory dataspace
    hsize_t dimsm[1];
    dimsm[0] = dims[0];
    H5::DataSpace memspace(1, dimsm);

    data = (bool*)calloc(dims[0], sizeof(bool));

    dset.read(data, H5::PredType::NATIVE_HBOOL, memspace, dspace);

    file.close();

}

void loadHDF() {
    const int WIDTH = 512;
    const int HEIGHT = 512;
    const int DEPTH = 826;


    const H5std_string FILE_NAMEonlyLungsBoolFlat("C:\\Users\\1\\PycharmProjects\\pythonProject3\\mytestfile.hdf5");
    const H5std_string DATASET_NAMEonlyLungsBoolFlat("onlyLungsBoolFlat");
    // create a vector the same size as the dataset
    bool* onlyLungsBoolFlat;
    loadHDFIntoBoolArr(FILE_NAMEonlyLungsBoolFlat, DATASET_NAMEonlyLungsBoolFlat, onlyLungsBoolFlat);

  

}


int main()
{
    loadHDF();
    return 0;
}

vcpk commands used


.\vcpkg install hdf5
.\vcpkg install hdf5[cpp]
.\vcpkg integrate install

enter image description here

Solution

  • The solution in my situation was simple just reinstall windows - on fresh installation I did steps as mentioned at the begining and all works now