Files
rust/tests/run-make
Eric Huss 6de57ea1ec [beta] Revert destabilise target-spec-json
This reverts https://github.com/rust-lang/rust/pull/150151 in order to
deal with https://github.com/rust-lang/rust/issues/151729 where the
destabilization caused a problem with building rustc itself with JSON
target specs. There's a fix at
https://github.com/rust-lang/rust/pull/152677, but we would prefer to
not backport that, and instead give ourselves more time to work out the
kinks. Also, the destabilization was incomplete, and the rest of the
changes are in 1.95 (https://github.com/rust-lang/rust/pull/151534 and
https://github.com/rust-lang/cargo/pull/16557), so it would be nice to
keep all the changes together in one release.

This reverts commit a89683dd95, reversing
changes made to 2f1bd3f378.
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The run-make test suite

The run-make test suite contains tests which are the most flexible out of all the rust-lang/rust test suites. run-make tests can basically contain arbitrary code, and are supported by the run_make_support library.

Infrastructure

A run-make test is a test recipe source file rmake.rs accompanied by its parent directory (e.g. tests/run-make/foo/rmake.rs is the foo run-make test).

The implementation for collecting and building the rmake.rs recipes are in src/tools/compiletest/src/runtest.rs, in run_rmake_test.

The setup for the rmake.rs can be summarized as a 3-stage process:

  1. First, we build the run_make_support library in bootstrap as a tool lib.

  2. Then, we compile the rmake.rs "recipe" linking the support library and its dependencies in, and provide a bunch of env vars. We setup a directory structure within build/<target>/test/run-make/

    <test-name>/
        rmake.exe              # recipe binary
        rmake_out/             # sources from test sources copied over
    

    and copy non-rmake.rs input support files over to rmake_out/. The support library is made available as an extern prelude.

  3. Finally, we run the recipe binary and set rmake_out/ as the working directory.