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Auto merge of rust-lang#113026 - jieyouxu:run-make-v2, r=bjorn3
Introduce `run-make` V2 infrastructure, a `run_make_support` library and port over 2 tests as example See [issue rust-lang#40713: Switch run-make tests from Makefiles to rust](rust-lang#40713) for more context. ### Basic Description of `run-make` V2 `run-make` V2 aims to eliminate the dependency on `make` and `Makefile`s for building `run-make`-style tests. Makefiles are replaced by *recipes* (`rmake.rs`). The current implementation runs `run-make` V2 tests in 3 steps: 1. We build the support library `run_make_support` which the `rmake.rs` recipes depend on as a tool dylib. 2. We build the recipe `rmake.rs` and link in the support library. 3. We run the recipe to build and run the tests. `rmake.rs` is basically a replacement for `Makefile`, and allows running arbitrary Rust code. ### Planned Changes - [x] Get rid of the builder style patterns in `rmake_support` and instead use something like ```rust let output = rustc!(scx, "--cfg x -Cprefer-dynamic -Csymbol-mangling-version=legacy - Zunstable-options"); ``` as per Nils' suggestion. This can probably use something like `xshell`. - [x] Make `run_make_support` into a proper crate so it can have external dependencies like `xshell`. - [x] Instead of having an entire alternative directory `run-make-v2`, change how V2 tests are collected based on presence of `rmake.rs` recipe file. This should ease migration and prevent git history from being messed up by big moves. ### Disclaimer The current implementation is very much a **very very rough prototype** just to get the 2 example tests working. I would appreciate any feedback on the design and implementation.
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