helloworld-gpp

This sample is showing you how you can use g++ to compile and run your c++ application.

Environment Setup

Make sure g++ installed by running following command:

g++ --version
zsh: command not found: g++

if you see command not found: g++, you need to install g++. g++ compiler is a part of gcc package in some operating systems, but in some you need to install it separately. I prefer to keep both of them

Installing gcc

• MacOS

  $ brew install gcc
  

• Linux
  • Debian/Ubuntu

    $ sudo apt install gcc
    $ sudo apt install g++
    

Building hello shared library (including hello.cpp and hello.h files)

Using -c you can compile your shared library that typically it shouldn't be executable and having main method. Here is an example:

$ g++ -c hello.cpp

After running above list, you should be able to find a hello.o in the same folder

Building greet executable file

Use following g++ with -o option to specify the executable file name you want to run and also add hello.o shared library file, so that g++ compiler link all files into one executable file called greet.

$ g++ -o greet main.cpp hello.o

Run greet application

Now you can run your compile greet app using following command:

$ ./greet
Hello World!