C++ how to use *.dylib

Environment: macOS
C++ Standard: 17
IDE: CLion

This tutorial will use DuckDB as example. From their installation page I downloaded the zip file which includes the follows:

1. Put files under my project

Put the folder under [myproject]/dependencies. Here myproject=duckdb-test.

2. Configurate CMakeLists.txt

• include_directories() searches for *.h file
• link_directories() searches for *.dylib file
• target_link_libraries() add the external library. The name convention of *.dylib file is “lb”+[name of library] + “.dylib”, we take the [name of library] and use it as the second parameter for the target_link_libraries() function

cmake_minimum_required(VERSION 3.17)
project(duckdb-test)

set(CMAKE_CXX_STANDARD 17)

include_directories(${CMAKE_SOURCE_DIR}/dependencies/libduckdb-osx-amd64) 
link_directories(${CMAKE_SOURCE_DIR}/dependencies/libduckdb-osx-amd64)

add_executable(duckdb-test main.cpp)

target_link_libraries(duckdb-test duckdb)

3. Now try it out in main.cpp

#include "duckdb.hpp"
#include <iostream>

using namespace duckdb;

int main(){
    DuckDB db(nullptr);
    Connection con(db);

    con.Query("CREATE TABLE integers(i INTEGER, j INTEGER)");
    con.Query("INSERT INTO integers VALUES (3, 4), (5, 6), (7, NULL)");

    auto result = con.Query("SELECT * FROM integers");
    result->Print();
}

Get the output:

i j 
INTEGER INTEGER 
[ Rows: 3]
3 4 
5 6 
7 NULL

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