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The tests need to run with certain environment variables set that only cmake really knows and that differ between stages. Cmake could just set the variables directly when running the tests and benchmarks, but that would leave no good way to manually run a single benchmark. So cmake generates some stage-specific scripts instead that set the required environment variables. Previously, those scripts were sourced directly by the individual `run_*` scripts, so the env scripts of different stages would overwrite each other. This PR changes the setup so they can instead be generated next to each other. This also simplifies the `run_*` scripts themselves a bit, and makes `tests/bench/build` less of a hack.
In this example, we use the Lean C code generator to construct a simple program.
1- Generate build/bin/test program using leanmake bin (assuming bin/ from e.g. the stage 0.5 build directory is in your PATH)
2- Execute test program
./build/bin/test hello world
It should produce Result: [hello, world]