38 lines
1.6 KiB
Markdown
38 lines
1.6 KiB
Markdown
[< Back](../README.md)
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# Exercise: Add files to the build
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In this exercise we will add a couple of files to the project.
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## Background: CMake
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As described in the slides, the project is defined by several CMake files. The ones we are interested
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is [`CMakeLists.txt`](../../../CMakeLists.txt) in the root project folder and
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the [`CMakeLists.txt`](../../../lib/CMakeLists.txt) file in the `lib` folder.
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You can see that the root CMake file is adding the `lib` subdirectory, this means that it is looking for
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a `CMakeLists.txt` file within that folder.
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The CMake file in the `lib` folder describes a few package requirements and then it does this
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```cmake
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file(GLOB_RECURSE sources CONFIGURE_DEPENDS "*.cpp" "*.hpp")
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```
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Here it is creating a CMake variable called `sources` that will contain all `.cpp` and `.hpp` files within the `lib`
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folder. This means that if we want to add new files, we don't have to list them here, as any applicable files are
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included. But adding a file will not automatically add the file in the IDE, as CMake needs to be run again for those
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changes to apply.
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# Exercise
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One of the Pac-Man ghosts is missing. We will fully implement this ghost later but for now let's add the `.cpp`
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and `.hpp` files to the project.
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1. Create a `Clyde.hpp` in the `lib/include` folder and a `Clyde.cpp` file in the `lib` folder.
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2. Run CMake again and see your IDE update to include these new files. You can try compiling again and see what happens.
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3. Include the `Clyde.hpp` file within the `Clyde.cpp` file, and add `#pragma once` to `Clyde.hpp`.
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4. Include `Clyde.hpp` in [GameState.hpp](../../../lib/include/GameState.hpp) and rebuild
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