For other mac users: I used gcc/gnatmake from the following distribution https://github.com/simonjwright/distributing-gcc/releases/tag/gcc-13.2.0-aarch64
There is also an Intel version https://github.com/simonjwright/distributing-gcc/releases/tag/gcc-13.1.0-x86_64
The gcc from homebrew doesn't include Ada unfortunately.

To run the built app you should remove quarantine attr, since it's not signed.
xattr -rc eepers.app

@rexim maybe this info should be added to README, not sure.

@Eropi4 Just wanted to say thanks! I was able to build the project on my Apple M1. I just wanted to try it out from the command line. For anyone else wanting to try, here's what I did:

1. Download and install https://github.com/simonjwright/distributing-gcc/releases/tag/gcc-13.2.0-aarch64. It installs to /opt

2. Clone raylib and build it for a Mac:

# See: https://github.com/raysan5/raylib/wiki/Working-on-macOS for more info
git clone git@github.com:raysan5/raylib.git
cd raylib/src && make PLATFORM=PLATFORM_DESKTOP

3. Clone eepers and use raylib file you just built above:

git clone git@github.com:tsoding/eepers.git
cd eepers
/opt/gcc-13.2.0-aarch64/bin/gnatmake -f -O3 -Wall -Wextra -gnat2022 eepers.adb -bargs -static -largs -framework CoreVideo -framework IOKit -framework Cocoa -framework GLUT -framework OpenGL ../raylib/src/libraylib.a

4. PLAY! ./eepers

Thanks again!

@mawaldne Great!
By the way, you don’t need to build raylib specifically for m1. The distributable provided by raylib (https://github.com/raysan5/raylib/releases/download/5.0/raylib-5.0_macos.tar.gz, I included it in the PR) has lib files for both x86 and arm.

I have no means to verify this for myself, but since other people say it works, I'll merge it. Thank you for the contribution!