...is Lua, patched so that the Retro68 cross-compiler can compile a library for 68k Macintoshes. To build, execute the following commands...
mkdir build
cd build
cmake .. -DCMAKE_TOOLCHAIN_FILE=path/to/Retro68-build/toolchain/m68k-apple-macos/cmake/retro68.toolchain.cmake
make
...where DCMAKE_TOOLCHAIN_FILE is set relative to your installation of Retro68.
Lua, redistributed here, is licensed under the MIT license. The CMake files here are adapted from Retro68's samples, which is GPL-3 licensed.