Linux support

[pcbeard]

Provides a way to build SwiftGodotKit applications on Linux. Tested on SteamDeck.

[pcbeard]

If you want to try this out, here are the build instructions:

On a SteamDeck (or probably any Linux system that supports Godot):

1. Create a distrobox container to install a swift toolchain:

# create container
DBX_CONTAINER_HOME_PREFIX="/home/deck/dbx" distrobox create --image swift --name swift

# enter container
distrobox enter swift

2. Install scons:

sudo apt install scons

3. Pull and build my PR branch of libgodot:

git clone git@github.com:ARPGLTD/libgodot.git
git checkout Fix_godot_main
scons target=template_debug dev_build=yes library_type=shared_library debug_symbols=yes use_llvm=yes
cd bin
sudo cp libgodot.linuxbsd.template_debug.dev.x86_64.llvm.so /usr/lib
ln -s /usr/lib/libgodot.linuxbsd.template_debug.dev.x86_64.llvm.so /usr/lib/libgodot.so

Now that /usr/lib contains the shared libraries, you should be able to build this PR branch of SwiftGodotKit and run some example code.

[migueldeicaza]

Question, why do we need the Godot header files in this package?

I did not see any new calls to it.

[pcbeard]

Question, why do we need the Godot header files in this package?

These are the same header files included in the .xcframework, declaring C functions and types used by existing code in SwiftGodoKit.

[migueldeicaza]

Oh got it!

[EstevanBR]

I've been using this happily on two different ubuntu instances. Thank you for this PR. 🙏🏻