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compiletest: Don't set TARGET for non run-make tests #147929

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Zalathar
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There are a few tests that were using TARGET to quietly do nothing on i586 targets, but it's cleaner to just add support for //@ ignore-i586 instead.

This lets us get rid of an unsafe env::set_var in compiletest, which really should have been setting the environment variable on individual build/run subprocess commands anyway.

@Zalathar
Add support for //@ ignore-i586
ff0c096 
There are a few tests that were trying to skip i586 targets via the `TARGET`
environment variable instead, so better to just add support for the directive.
@Zalathar
Don't set TARGET for non run-make tests
a581154 
If something like this is needed again in the future, please set environment
variables for the build and run subprocesses, instead of setting them on the
compiletest process.
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rustbot commented Oct 21, 2025

compiletest directives have been modified. Please add or update docs for the
new or modified directive in src/doc/rustc-dev-guide/.

Some changes occurred in src/tools/compiletest

cc @jieyouxu

@rustbot rustbot added A-compiletest Area: The compiletest test runner A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Oct 21, 2025
@rustbot rustbot added T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Oct 21, 2025
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rustbot commented Oct 21, 2025

r? @jieyouxu

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This was previously tested at #147896, but let's run some more try jobs on this PR just to be sure.

@bors try jobs=dist-i586-gnu-i586-i686-musl,i686-gnu-1,i686-msvc-1,test-various

rust-bors bot added a commit that referenced this pull request Oct 21, 2025
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Auto merge of #147929 - Zalathar:target, r=<try>
ca68066 
compiletest: Don't set `TARGET` for non run-make tests

try-job: dist-i586-gnu-i586-i686-musl
try-job: i686-gnu-1
try-job: i686-msvc-1
try-job: test-various
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rust-bors bot commented Oct 21, 2025

☀️ Try build successful (CI)
Build commit: ca68066 (ca68066f4d5b47d9d0925fe95dbf77a0f5ea49f1, parent: c7a635f33c5fbd1ead110243a2f4a5f0561d79b0)

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A-compiletest Area: The compiletest test runner A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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