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| -rw-r--r-- | src/doc/rustc-dev-guide/src/tests/running.md | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/doc/rustc-dev-guide/src/tests/running.md b/src/doc/rustc-dev-guide/src/tests/running.md index 6bc794ca917..71fb82b68b1 100644 --- a/src/doc/rustc-dev-guide/src/tests/running.md +++ b/src/doc/rustc-dev-guide/src/tests/running.md @@ -133,6 +133,15 @@ Under the hood, the test runner invokes the standard Rust test runner filtering for tests that include "issue-1234" in the name. (Thus `--test-args` is a good way to run a collection of related tests.) +## Passing arguments to `rustc` when running tests + +It can sometimes be useful to run some tests with specific compiler arguments, +without using `RUSTFLAGS` (during development of unstable features, with `-Z` +flags, for example). + +This can be done with `./x test`'s `--rustc-args` option, to pass additional +arguments to the compiler when building the tests. + ## Editing and updating the reference files If you have changed the compiler's output intentionally, or you are |