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Adjust the Arm targets in CI to reflect latest changes #147596

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I wasn't sure why armv7a-none-eabihf was missing from the build-manifest program, but armv8r-none-eabihf was there, as they were both Tier 3 targets up until very recently. So, I added it, but that might be wrong.

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Adjust the Arm targets in CI to reflect latest changes
cc96d3f 
* Adds armv7a-none-eabihf (rust-lang#146522)
* Adds armv8r-none-eabihf (rust-lang#146520)
* Drops armeb*-none-* (rust-lang#146523)
@rustbot rustbot added A-CI Area: Our Github Actions CI 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-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. labels Oct 11, 2025
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rustbot commented Oct 11, 2025

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build-manifest being missed is probably just an oversight, it usually takes someone actually trying to use the target to find that kind of gap.

@bors r+ rollup=iffy

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bors commented Oct 12, 2025

📌 Commit cc96d3f has been approved by Mark-Simulacrum

It is now in the queue for this repository.

@bors bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Oct 12, 2025
Zalathar added a commit to Zalathar/rust that referenced this pull request Oct 12, 2025
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Rollup merge of rust-lang#147596 - thejpster:build-new-arm-tier2-targ…
55d093b 
…ets, r=Mark-Simulacrum

Adjust the Arm targets in CI to reflect latest changes

* Adds build of `armv7a-none-eabihf` (rust-lang#146522)
* Adds build of `armv8r-none-eabihf` (rust-lang#146520)
* Drops build of `armeb*-none-*` (rust-lang#146523)

I wasn't sure why `armv7a-none-eabihf` was missing from the build-manifest program, but `armv8r-none-eabihf` was there, as they were both Tier 3 targets up until very recently. So, I added it, but that might be wrong.
@Zalathar Zalathar mentioned this pull request Oct 12, 2025
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bors added a commit that referenced this pull request Oct 12, 2025
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Auto merge of #147598 - Zalathar:rollup-87wjjvk, r=Zalathar
a6d9321 
Rollup of 12 pull requests

Successful merges:

 - #138799 (core: simplify `Extend` for tuples)
 - #146692 (Save x.py's help text for saving output time)
 - #147168 (Don't unconditionally build alloc for `no-std` targets)
 - #147178 ([DebugInfo] Improve formatting of MSVC enum struct variants)
 - #147240 (Add an ACP list item to the library tracking issue template)
 - #147246 (Explain not existed key in BTreeMap::split_off)
 - #147393 (Extract most code from `define_feedable!`)
 - #147495 (Update wasm-component-ld to 0.5.18)
 - #147503 (Fix documentation of Instant::now on mac)
 - #147541 (Change int-to-ptr transmute lowering back to inttoptr)
 - #147549 (Replace `LLVMRustContextCreate` with normal LLVM-C API calls)
 - #147596 (Adjust the Arm targets in CI to reflect latest changes)

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`@rustbot` modify labels: rollup
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Possibly failed in rollup in dist-various-1: #147598 (comment)

@bors r-

@bors bors added S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. and removed S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. labels Oct 12, 2025
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@bors try jobs=dist-various-1

rust-bors bot added a commit that referenced this pull request Oct 12, 2025
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Auto merge of #147596 - thejpster:build-new-arm-tier2-targets, r=<try>
c5785df 
Adjust the Arm targets in CI to reflect latest changes

try-job: dist-various-1
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build-manifest being missed is probably just an oversight, it usually takes someone actually trying to use the target to find that kind of gap.

@bors r+ rollup=iffy

Which Tier of target should be in build-manifest?

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rust-bors bot commented Oct 12, 2025

💔 Test for c5785df failed: CI. Failed jobs:

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cargo:warning=cc1: error: '-mfloat-abi=hard': selected processor lacks an FPU
2025-10-12T08:45:46.0994124Z
2025-10-12T08:45:46.0994203Z --- stderr
2025-10-12T08:45:46.0994322Z
2025-10-12T08:45:46.0994328Z
2025-10-12T08:45:46.0996208Z error occurred: Command "sccache" "arm-none-eabi-gcc" "-O3" "-ffunction-sections" "-fdata-sections" "-g" "-fno-omit-frame-pointer" "-mfloat-abi=hard" "-fno-builtin" "-fvisibility=hidden" "-ffreestanding" "-Werror=implicit-function-declaration" "-DCOMPILER_RT_HAS_FLOAT16" "-DVISIBILITY_HIDDEN" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage1-std/armv8r-none-eabihf/release/build/compiler_builtins-aaf6c8d45d5c9d4a/out/45c91108d938afe8-absvdi2.o" "-c" "/checkout/src/llvm-project/compiler-rt/lib/builtins/absvdi2.c" with args arm-none-eabi-gcc did not execute successfully (status code exit status: 1).

right. Got to set some CFLAGS for this target. On it.

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I think I have a fix, but let me build locally and check the minors is actually good.

I wanted to pass some CLAGS to build-std but I couldn’t work out how to, so I’ll just build a whole toolchain.

@thejpster
Add CFLAGS for armv8r-none-eabihf
9b91c3e
@thejpster
Change armv7a-none-eabihf CFLAGS to assume only single-precision FPU
fef16d2 
Not all ARMv7-A CPUs have a double-precision FPU. So adjust the CFLAGS
from `+vfpv3` (which assumes 32 double-precision registers) to `+fp`
(which only assumes 16 double-precision registers).
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I was able to build libcore locally for armv7a-none-eabihf and armv8r-none-eabihf and pass the cortex-ar test suite with it. Not that it's an exhaustive test suite by any means, but it did at least pass.

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Should we be trying to derive the CFLAGS from the Rust (more specific?) target tuple? I see that there's a bunch of similar-looking code in cc-rs (https://github.com/rust-lang/cc-rs/blob/87e5faef33d451532dd87c144a5d3eecb04192f2/src/lib.rs#L2324) that maybe needs updating or could be reused here somehow?

@bors try jobs=dist-various-1

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⌛ Trying commit fef16d2 with merge aa8ffd3…

To cancel the try build, run the command @bors try cancel.

Workflow: https://github.com/rust-lang/rust/actions/runs/18447299050

rust-bors bot added a commit that referenced this pull request Oct 12, 2025
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Auto merge of #147596 - thejpster:build-new-arm-tier2-targets, r=<try>
aa8ffd3 
Adjust the Arm targets in CI to reflect latest changes

try-job: dist-various-1
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Maybe the target specification should name both the default C compiler to use, but also the flags required to make that C compiler work. If not there, then it should at least be documented on the platform support pages.

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