2.2.10. Example: Building a C++ program with the GCC (compiling and linking in two steps)

Procedure

1. Create a directory hello-cpp:

   $ mkdir hello-cpp

2. Change to the created directory:

   $ cd hello-cpp

3. Create file hello.cpp with the following contents:

   #include <iostream>
   
   int main() {
     std::cout << "Hello, World!\n";
     return 0;
   }

4. Compile the code with g++:

   $ g++ -c hello.cpp

   The object file hello.o is created.

5. Link an executable file helloworld from the object file:

   $ g++ hello.o -o helloworld

6. Run the resulting executable file:

   $ ./helloworld

   Hello, World!

7. Optional: Change back to the parent directory:

   $ cd ..

8. Optional: Remove the hello-cpp directory:

   $ rm -r hello-cpp