CMakeLists.txt

cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
project(recsys)

find_package(Torch REQUIRED)
find_library(ROCKSDB_LIB rocksdb)
find_package(Boost 1.67.0 REQUIRED COMPONENTS system filesystem)

add_executable(recsys main.cpp)
target_link_libraries(recsys "${Boost_LIBRARIES}" "${ROCKSDB_LIB}") #It works fine

# If I link the libtorch, it will have segementation fault for boost example. For RocksDB, it will have complie error: "undefined reference to `rocksdb::DB::Open(rocksdb::Options const&, std::string const&, rocksdb::DB**)' "
# target_link_libraries(recsys "${TORCH_LIBRARIES}" "${Boost_LIBRARIES}" "${ROCKSDB_LIB}") ]]
set_property(TARGET recsys PROPERTY CXX_STANDARD 14)

main1.cpp

#include <iostream>

#include "rocksdb/db.h"
int main(int argc, char *argv[]) 
{
    rocksdb::DB* db;
    rocksdb::Options options;
    options.create_if_missing = true;
    rocksdb::Status status = rocksdb::DB::Open(options, "./testdb", &db);
    std::cout << "rocksb open status: " << status.ok() << std::endl;

    std::string sKey("key-one");
    std::string sValue("Value Some");
    
    status = db->Put(rocksdb::WriteOptions(), sKey, sValue);
    if (status.ok()) 
    {
        std::cout << "put key ok" << std::endl;
        std::string rValue;
        rocksdb::Status s = db->Get(rocksdb::ReadOptions(), sKey, &rValue);
        if (s.ok()) {
            std::cout << "read from rocksdb success: " << rValue << std::endl;
        }
    } 
    else 
    {
        std::cout << "put key error, with status: " << status.code() << std::endl;
    }

    db->Close();
    
    return 0;
}

main2.cpp

#include <boost/filesystem.hpp>
namespace fs = boost::filesystem;

int main()
{
    string base_dir = "/home/xxx";

    fs::path base_path(base_dir);
    fs::path train_file("a.csv");
    fs::path target_file("b.csv");

    fs::path train_path = base_path / train_file;
    fs::path target_path = base_path / target_file;
  return 0;
}