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Hello everyone.

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In this video, we're going to configure CodeLite

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 to work with the C++ compiler on Ubuntu Linux.

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I'm running Ubuntu 22.04, which is Jemmy.

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I've already opened CodeLite.

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And the first time you run CodeLite,

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you're going to get a setup wizard pop up window that pops up just like this.

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If you don't get that, you can always go to help and run it from there.

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We do want to run this setup wizard, so I'm going to click next.

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I'm going to click C++ development and click next again.

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And I'm going to ask CodeLite to scan my system to find compilers.

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I'll click that button and you can see it found GCC 11,

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which was the compiler that we installed.

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Now, I'm going to rename that to just GCC,

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that way it's consistent throughout the course but I'll do that in just a moment.

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I'll select next here,

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you can choose the color whether you want a dark theme or a Light theme.

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I generally use a dark theme, but I think the Light theme shows up

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better on video, so I'm just going to leave this alone and I'll select Next.

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And on this screen, just click Finish.

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Okay, so CodeLite will close down and open back up.

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And now, what we want to do is?

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We want to setup the compiler and we're just going to change the name.

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So I'm going to come up to Settings and go to Build Settings

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and there you can see GCC right here.

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So I'm just going to right click and rename and I'm just going to call it GCC,

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just like that.

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And I'll hit OK.

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Perfect.

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Now, what we want to do is? We want to create workspaces.

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The way CodeLite works is it's got workspaces.

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And then in those workspaces, you can have many projects,

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each project being a C++ program.

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So, it's a real nice way to organize your work.

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The first thing we want to do is, we want to create a new workspace,

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now there's a lot of ways to do that.

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I can click this big button right here, right in front of me,

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I can also come up to workspace, new workspace and I can go to file,

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new workspace over here.

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A lot of different ways to do it, I'm going to just click this button right here.

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Now, I'm going to select the C++ Workspace and click OK.

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Now it's going to ask me, where do you want to store your workspaces?

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You've got some choices here, you can put them on your desktop,

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you can put them in your documents folder.

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I'm going to put it right off of my home directory

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right there and I'm going to create a folder there.

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Let me click over here to create the folder and I'm going to call it Workspaces.

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So I can create as many workspaces as I want in here and then

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projects within each of those workspaces

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and I can have everything nicely organized, so I'm going to click create

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 and I'll hit open.

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So now, you can see that the workspace path is my

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home directory followed by workspaces.

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And the workspace name is going to be workspace One

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or whatever you like.

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When you're working on pointers, maybe you want a pointer as workspace and so forth.

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And make sure that the workspace under a separate directory is checked

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 and I'm going to click OK.

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And that will create my workspace.

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And you can see it right over here on the workspace view, you can see

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the workspace one.

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Now, what we want to do is?

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Create projects within that workspace.

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So I can right click on the Workspace One and create a new project.

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Or I can come up to file new project.

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Again, a lot of different ways to do it,

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I'm just going to right click here and say new Project.

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And now, we get this new project wizard.

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We know that the path is that Workspace One folder,

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that's where my workspace is.

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Now, it's asking us for the project name.

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I'm just going to call it Project One, just like that.

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Very important, I'm going to probably say this more times than you want to hear it,

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but it's very important.

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No spaces, no special characters, no international characters anywhere.

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So, don't start putting plus symbols and dots and slashes

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and dollar signs in these names

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because that will usually mess up the builds later.

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So, just keep them really simple,

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make sure that they create the project in its own folder is checked.

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Now, the category we're going to select is console

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 because we're going to be creating console based applications.

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The type is going to be simple executable G++ right here,

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The compiler is GCC that the one we just installed and renamed.

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The Debugger is the GNU

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GDB debugger, we only have one option here.

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And the build system, we've got two options, we're going to select CodeLite make file generator.

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I'm installing version 17.3 of CodeLite.

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Previous versions had a default build system, it was called Default

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and it worked great.

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But in this version and going forward,

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the CodeLite developer removed that default build system,

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I don't know why did that, but we have to deal with it.

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So, we'll make a few adjustments to the way we create new projects but it's pretty easy.

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Once we have all that, make sure all this is correct,

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you click OK and you can see now that we've got a new project over here, Project One.

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And it's got a source folder and it's got my main.cpp file in it.

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The main.cpp file is our source code.

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Now, I'm going to make this a little bit bigger, so I'm going to go to settings,

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colors and fonts and I'm just going to create

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maybe a, let's see,

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we can set that to 20 that should be nice and big so it shows up good on video.

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And I'll select that and apply and then hit OK.

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All right, so now, the font is nice and large.

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So, first thing we're going to do is, we're going to delete this.

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I'm just going to copy it all and just press delete.

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Now you can see over here you have this black dot

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that's telling you that this file has been changed.

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So that what's on disk is different from what you're seeing.

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Makes sense because we just deleted a bunch of stuff.

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So, we want to be sure that,

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whenever we see that, we save when we're done.

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So, first thing we're going to do is, we're going to type in

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a real simple Hello World C++ program.

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The reason we do this is because it's simple

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 and if it runs and we see Hello World,

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we know that our development environment is set up correctly,

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so that's the reason for doing it.

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At this point, just type along, follow along,

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all the C++ will be explained later.

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The point of this video is to make sure that our development environment is set up correctly.

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So, I'm going to type pound, include

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space left angle bracket, io stream,

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and right-angle bracket.

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Then I'm going to type using

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namespace

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std semicolon,

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there's spaces between using

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and the namespace and namespace and standard.

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Now, I want to write my main function.

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Every C++ program has a main function

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and that's where execution begins.

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So let's do that, we'll type int, int

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space main,

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 left Paren, right paren.

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And then we have an open curly brace

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and you'll notice that CodeLite automatically closed the right

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curly brace for me,

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so that way they match.

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Make sure you spell main correctly, make sure those are parentheses,

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make sure you've got spaces where I have spaces and so forth.

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Okay, so now, I'm just going to tab over and I'm going to type c out,

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two

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left angle brackets side by side, no space between them

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and Hello World

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and I want that within double quotes,

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two left angle brackets again and then,

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 the word endl for end line.

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Make sure that's endl and not end1, the l

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and the 1 look really similar.

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Then I'm going to return space zero and a semicolon.

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That's it.

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That's our simple main.

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When we run it, we should see Hello World display on the terminal.

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But before we run it, we need to configure this project and give it a few compiler settings.

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First thing, though, is let's save this, so you can come up here to file,

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 save file or you can press CTRL S, I'm going to press CTRL S

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and you can see that black dot is gone,

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it might be a red dot on your system.

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It was a red dot in my other system, but it's a black dot here.

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In any case, you're going to see that dot there

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when the file is dirty.

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In other words, when it hasn't been saved.

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When I've made some changes, but I haven't saved them to disk yet.

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Okay, so now, let's set up the project.

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I'm going to right click on the project

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 and select Settings.

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You can also just click on the project and select this wrench right up here,

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 does the same thing.

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At this point, my project settings window opens.

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And let's go through this, the project type is executable.

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The make file generator is CodeLite make file generator, the compiler is GCC.

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The intermediate directory is blank, the output file says Project name.

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And sometimes, you need to stretch this out, just a little bit

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to see more stuff.

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And I think that doesn't happen on Windows or Mac,

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but it does happen on Linux sometimes, let me stretch that out a little bit.

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So, all of this is the stuff that we put in earlier.

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There's one thing that's really important is this one right here, the working directory.

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We want to delete that the entire line

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and we want to replace it with dollar,

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left parentheses, project path,

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right parentheses

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 where the p in project and the p and path are uppercase,

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that's really important.

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Okay, that's the first part.

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The second part is, I'm going to come over here to my compiler, click compiler

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and right up here where it says CC++ compiler, I'm going to click that line

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and you can see these little button shows up with three dots in it, I'm going to click that.

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Then I'm going to come over here in the compiler options and I want to choose

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enable C++ 17 features.

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This one right here, enable C++ 17 features,

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std equals C++ 17.

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That will tell CodeLite to use the C++ version of the compiler.

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That's it, we're done.

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We'll click OK, we'll click apply

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and we'll click OK one more time.

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At this point, we are good to go.

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Now, I'm going to make this full screen here,

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 so that we have a little bit more room to see what's happening.

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Now, we're ready to build our project.

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The way that CodeLite works,

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since it can have multiple projects in this workspace here,

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of course we only have one right now, we'll create another one in just a moment.

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It builds and runs the active project

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and you can see the active project right there, it's bold and it's italicized.

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So if I have a bunch of projects there's only going to be one that's bold and italicized

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and that's considered the active project.

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To make a project, the active project,

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you can select it, right click on it and then come down here to make active

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or you could just double click on it, simple as that.

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Now, we're ready to build this.

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So, we're going to come up to build

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and I'm going to select rebuild project and I'll

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talk about all of the differences here in a future video,

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I'm going to select rebuild project.

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And the output window shows up down at the bottom,

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 I'll stretch this out so it's a little bit bigger.

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And you can see right here we're using the C++ compiler,

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we're building project one main CPP,

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we've got std equals C++ 17and all the stuff that we typed in,

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so this is great.

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We have a successful build, no errors, no warnings.

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Now, I can run my program.

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So let me close this up, again to give us a little bit more room down there.

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And I'm going to go to build and I'm going to select run.

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Do I want to build and execute or just execute?

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I've already built it so I'm just going to execute it.

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And we get a terminal window popup and it says Hello World,

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hit any key to continue.

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The Hello world is our program.

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The hit any key to continue is what CodeLite puts in there

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because otherwise it would just display that and close up the window real fast.

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So, we press any key to continue, it closes the window and we are done.

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So, that's it, simple as that, that's the way we organize this.

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In a couple of videos from now,

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I'm going to have a video that shows you how to create a project template,

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so that we don't have to do the std equals C++ 17 part

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which saves us a little bit of time.

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Great.

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So, let's create another project.

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And the second project is going to be basically the same source code,

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 again close this down here.

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So, I'm just going to copy this source code,

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I'm going to press CTRL C to copy

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and I'm going to go to my workspace and I'm going to select right click,

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new project.

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I get the same new project wizard

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 and I'm going to create project Two in this case.

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Again, no spaces, no special characters, no international characters.

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Make sure that create the project in its own folder is selected,

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these settings should carry over from the last time we did this,

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so we've got console simple executable G++, GCC,

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 the GNU gdb debugger and CodeLite make file generator.

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We'll click OK.

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And now, over here, you can see we have project Two

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 and it's got a source folder and it's got a main CPP.

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Let me expand these, so you can see that they are two distinct projects.

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Now if you look up here,

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you know that this is the source code for project One.

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You can see that right up here in the tab.

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And if I double click on this main CPP, it will open up next to it

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and that's project Two, so this is project One's main,

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this is project Two's main.

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So, I'm just going to grab all that and paste

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the other one that I copied into it and I'm going to say Hello World

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from project Two.

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Notice the black dot up here, so I'm going to hit CTRL S to save.

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Now, I know that I've saved this.

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Now, we're going to do the same thing, we're going to set up project Two,

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so I'm going to click on Project Two, click on the wrench

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and right here, you can always see up here it says project two settings

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 and this really stretched out that time.

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There we go, let's try that.

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So again, general, we're going to come right here to working directory.

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I'm going to delete that and I'm going to type dollar

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 project path

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inside parentheses with the two p's uppercase.

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 That's it. Then I'm going to go to my compiler,

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go to my C++ compiler options,

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click that button with the three dots,

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select enable C++ 17 features stood equals C++ 17.

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Click OK, apply, click OK.

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Now, we're ready to build

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 but we have to wait a second,

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we can't just build now, because if we build, the active project will be built.

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And that's project one, you can see here.

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I don't want to build Project One, I want to build Project Two.

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So, what I can do is?

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I can right click on Project Two and make it active

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 or I could just double click on it.

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When I double click on it, you can see that it's now the active project,

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 it's bold and italicized.

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So I can come back up to build, I can select rebuild Project,

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we have our build output down here and you can see that

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Project Two has been built right here.

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We've got all the options we want, so this is a good thing, I'll close this up.

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And now, we're ready to run, so I'm going to go build and run.

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I'm just going to execute and now,

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we should say Hello World from Project Two, which is exactly what we see.

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We can press any key, I'm just going to press Enter to close this down.

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So that's it, we've got our build environment working.

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Now, we can start writing code.

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The other thing that I'd like you to do is go up to Settings

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 and Preferences

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and come all the way over here on the right to miscellaneous and just click that.

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And in startup right here, there is a check for new version on

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startup and I want you to uncheck that.

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Otherwise CodeLite is going to ask you to upgrade to a new version every time,

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there's a new version or a point release.

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My advice is to resist the urge to update.

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If you've got a working environment that's working

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and you're able to use it to develop programs,

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don't mess around with it.

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Just use the same development environment throughout the course.

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Sometimes we think that the upgrades are better.

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A lot of times upgrades are bleeding edge and they're full of bugs and

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they're not really worth the trouble.

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So once we've got

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 a working development environment, leave it alone, it works great.

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I'm going to apply, click OK.

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And that's it, we're ready to go, our build environment is set up.

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One more thing, when I build, it's possible that we have errors, right?

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Of course, we can have typos, we can have syntax errors.

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So for example, suppose I forgot that semicolon right there,

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I can come up to, first I'm going to save

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and there's a little red arrow there that's telling me there's a problem

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 there's expecting a semicolon after namespace.

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That's not the compiler,

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that's the CodeLite IntelliSense,

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if you will, which is kind of going through our code and looking at it and trying to help us out.

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But if we build, you can see that we have a syntax error.

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It says expecting a semicolon before the int

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and we have an error and our program did not build correctly.

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So we don't want to run this program until we fix the error.

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There are a lot of errors that we can get, and we'll do a whole

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video on just the kinds of errors that you'll see common errors.

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This is one that's really common

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is forgetting the semicolon at the end.

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A lot of student spell io stream wrong and they put io steam,

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so that's a problem.

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If we misspell Main,

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you can imagine if we put spaces between these two angle brackets,

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if we forget one of these parentheses,

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so there's a lot of places the syntax has to be just right.

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But again, we'll talk about all of this in the course.

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At this point, you're good to go.

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If you have any questions or any issues, please post them in the forum.

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Look on the forums, because just about every question has already been asked and answered.

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But if you have a question that's not out there, please post it and I'll be happy to help you.

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The next video, you should go to in this section is

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 the video that shows how to create a default project template,

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so I'll see you there.