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Fix linker detection for clang with prefix #109156

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merged 1 commit into from
Mar 17, 2023

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taiki-e
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@taiki-e taiki-e commented Mar 15, 2023

#106489 removed check for clang with prefix. It says:

Also remove the check for -clang, since there are no architecture specific variants of clang (to my knowledge).

However, when doing cross-compilation, a wrapper script for clang with the target name as a prefix is sometimes used.

CC_i686_unknown_freebsd=i686-unknown-freebsd12-clang \

for tool in clang clang++; do
tool_path=/usr/local/bin/${triple}-${tool}
cat > "$tool_path" <<EOF
#!/bin/sh
exec $tool --sysroot=$sysroot --prefix=${sysroot}/bin "\$@" --target=$triple

CC_aarch64_unknown_fuchsia=aarch64-unknown-fuchsia-clang \

base.linker = Some("aarch64-w64-mingw32-clang".into());

It seems the regression did not occur on the targets mentioned above because the default linker flavor is gcc, but it did occur on targets where the default linker flavor is not gcc (taiki-e/setup-cross-toolchain-action@fd352f3).

r? @petrochenkov

@rustbot rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Mar 15, 2023
@jonhoo
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jonhoo commented Mar 15, 2023

I'm also running into this with Rust 1.68.0 as I have an instance where the build is pointed at x86_64-unknown-linux-gnu-clang. This should probably be tagged with regression-from-stable-to-stable.

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Thanks!
In #106489 I wanted to suggest always treating gcc and clang identically, but the PR already went through too many rounds of tweaks, so I just merged it in hope that if *-clang versions exist then someone reports it, likely a mistake in retrospect.

@petrochenkov petrochenkov added beta-nominated Nominated for backporting to the compiler in the beta channel. stable-nominated Nominated for backporting to the compiler in the stable channel. labels Mar 16, 2023
@petrochenkov
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This needs to be backported, but not important enough for a stable backport unless there will be a point release for other reasons.

@petrochenkov
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@bors r+ rollup

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bors commented Mar 16, 2023

📌 Commit 86a5e36 has been approved by petrochenkov

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 Mar 16, 2023
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Mar 16, 2023
…henkov

Fix linker detection for clang with prefix

rust-lang#106489 removed check for clang with prefix. It says:

> Also remove the check for -clang, since there are no architecture specific variants of clang (to my knowledge).

However, when doing cross-compilation, a wrapper script for clang with the target name as a prefix is sometimes used.

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/host-x86_64/dist-various-2/Dockerfile#L62

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/scripts/freebsd-toolchain.sh#L76-L80

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/host-x86_64/dist-various-2/Dockerfile#L40

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/compiler/rustc_target/src/spec/aarch64_pc_windows_gnullvm.rs#L7

It seems the regression did not occur on the targets mentioned above because the default linker flavor is gcc, but it did occur on targets where the default linker flavor is not gcc (taiki-e/setup-cross-toolchain-action@fd352f3).

r? `@petrochenkov`
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Mar 17, 2023
…henkov

Fix linker detection for clang with prefix

rust-lang#106489 removed check for clang with prefix. It says:

> Also remove the check for -clang, since there are no architecture specific variants of clang (to my knowledge).

However, when doing cross-compilation, a wrapper script for clang with the target name as a prefix is sometimes used.

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/host-x86_64/dist-various-2/Dockerfile#L62

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/scripts/freebsd-toolchain.sh#L76-L80

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/host-x86_64/dist-various-2/Dockerfile#L40

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/compiler/rustc_target/src/spec/aarch64_pc_windows_gnullvm.rs#L7

It seems the regression did not occur on the targets mentioned above because the default linker flavor is gcc, but it did occur on targets where the default linker flavor is not gcc (taiki-e/setup-cross-toolchain-action@fd352f3).

r? ``@petrochenkov``
matthiaskrgr added a commit to matthiaskrgr/rust that referenced this pull request Mar 17, 2023
…henkov

Fix linker detection for clang with prefix

rust-lang#106489 removed check for clang with prefix. It says:

> Also remove the check for -clang, since there are no architecture specific variants of clang (to my knowledge).

However, when doing cross-compilation, a wrapper script for clang with the target name as a prefix is sometimes used.

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/host-x86_64/dist-various-2/Dockerfile#L62

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/scripts/freebsd-toolchain.sh#L76-L80

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/src/ci/docker/host-x86_64/dist-various-2/Dockerfile#L40

https://github.com/rust-lang/rust/blob/1716932743a7b3705cbf0c34db0c4e070ed1930d/compiler/rustc_target/src/spec/aarch64_pc_windows_gnullvm.rs#L7

It seems the regression did not occur on the targets mentioned above because the default linker flavor is gcc, but it did occur on targets where the default linker flavor is not gcc (taiki-e/setup-cross-toolchain-action@fd352f3).

r? ```@petrochenkov```
bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 17, 2023
…iaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang#108958 (Remove box expressions from HIR)
 - rust-lang#109044 (Prevent stable `libtest` from supporting `-Zunstable-options`)
 - rust-lang#109155 (Fix riscv64 fuchsia LLVM target name)
 - rust-lang#109156 (Fix linker detection for clang with prefix)
 - rust-lang#109181 (inherit_overflow: adapt pattern to also work with v0 mangling)
 - rust-lang#109198 (Install projection from RPITIT to default trait method opaque correctly)
 - rust-lang#109215 (Use sort_by_key instead of sort_by)
 - rust-lang#109229 (Fix invalid markdown link references)

Failed merges:

r? `@ghost`
`@rustbot` modify labels: rollup
@bors bors merged commit cd6d165 into rust-lang:master Mar 17, 2023
@rustbot rustbot added this to the 1.70.0 milestone Mar 17, 2023
@taiki-e taiki-e deleted the linker-detection branch March 17, 2023 18:31
@Mark-Simulacrum Mark-Simulacrum added stable-accepted Accepted for backporting to the compiler in the stable channel. and removed stable-nominated Nominated for backporting to the compiler in the stable channel. labels Mar 19, 2023
bors added a commit to rust-lang-ci/rust that referenced this pull request Mar 20, 2023
…Simulacrum

[stable] 1.68.1 release

This packages up a set of release notes, version bump, and backports of:

* Don't eagerly convert principal to string rust-lang#108162
*  Revert "enable ThinLTO for rustc on x86_64-pc-windows-msvc dist builds" rust-lang#109094
*  Create dirs for build_triple rust-lang#109111
*  Fix linker detection for clang with prefix rust-lang#109156
*  ci: use apt install --download-only for solaris debs rust-lang#108951

The last of those is not yet stable-accepted but I expect it to be, we will drop it and rebuild artifacts if we don't actually approve it.

r? `@Mark-Simulacrum`
@Mark-Simulacrum Mark-Simulacrum modified the milestones: 1.70.0, 1.68.1 Mar 22, 2023
@apiraino
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Beta backport accepted as per compiler team on Zulip

@rustbot label +beta-accepted

@rustbot rustbot added the beta-accepted Accepted for backporting to the compiler in the beta channel. label Mar 23, 2023
@Mark-Simulacrum Mark-Simulacrum removed the beta-nominated Nominated for backporting to the compiler in the beta channel. label Mar 29, 2023
@Mark-Simulacrum Mark-Simulacrum modified the milestones: 1.68.1, 1.69.0 Mar 29, 2023
bors added a commit to rust-lang-ci/rust that referenced this pull request Apr 2, 2023
…k-Simulacrum

[beta] backport

This PR backports:

- rust-lang#109332: Move us to the new large runners pool
- rust-lang#109156: Fix linker detection for clang with prefix
- rust-lang#109111: Create dirs for build_triple
- rust-lang#109094: Revert "enable ThinLTO for rustc on x86_64-pc-windows-msvc dist builds"

Also bumps us to the latest released stable, 1.68.2.

r? `@Mark-Simulacrum`
netbsd-srcmastr pushed a commit to NetBSD/pkgsrc that referenced this pull request Apr 8, 2023
Pkgsrc changes:
 * Adjust patches (add & remove) and cargo checksums to new versions.
 * It's conceivable that the workaround for LLVM based NetBSD works
   even less in this version (ref. PKGSRC_HAVE_LIBCPP not having a
   corresponding patch anymore).

Upstream changes:

Version 1.68.2 (2023-03-28)
===========================

- [Update the GitHub RSA host key bundled within Cargo]
  (rust-lang/cargo#11883).
  The key was [rotated by GitHub]
  (https://github.blog/2023-03-23-we-updated-our-rsa-ssh-host-key/)
  on 2023-03-24 after the old one leaked.
- [Mark the old GitHub RSA host key as revoked]
  (rust-lang/cargo#11889).
  This will prevent Cargo from accepting the leaked key even when
  trusted by the system.
- [Add support for `@revoked` and a better error message for
  `@cert-authority` in Cargo's SSH host key verification]
  (rust-lang/cargo#11635)

Version 1.68.1 (2023-03-23)
===========================

- [Fix miscompilation in produced Windows MSVC artifacts]
  (rust-lang/rust#109094)
  This was introduced by enabling ThinLTO for the distributed rustc
  which led to miscompilations in the resulting binary. Currently
  this is believed to be limited to the -Zdylib-lto flag used for
  rustc compilation, rather than a general bug in ThinLTO, so only
  rustc artifacts should be affected.
- [Fix --enable-local-rust builds]
  (rust-lang/rust#109111)
- [Treat `$prefix-clang` as `clang` in linker detection code]
  (rust-lang/rust#109156)
- [Fix panic in compiler code]
  (rust-lang/rust#108162)

Version 1.68.0 (2023-03-09)
===========================

Language
--------

- [Stabilize default_alloc_error_handler]
  (rust-lang/rust#102318)
  This allows usage of `alloc` on stable without requiring the
  definition of a handler for allocation failure. Defining custom
  handlers is still unstable.
- [Stabilize `efiapi` calling convention.]
  (rust-lang/rust#105795)
- [Remove implicit promotion for types with drop glue]
  (rust-lang/rust#105085)

Compiler
--------

- [Change `bindings_with_variant_name` to deny-by-default]
  (rust-lang/rust#104154)
- [Allow .. to be parsed as let initializer]
  (rust-lang/rust#105701)
- [Add `armv7-sony-vita-newlibeabihf` as a tier 3 target]
  (rust-lang/rust#105712)
- [Always check alignment during compile-time const evaluation]
  (rust-lang/rust#104616)
- [Disable "split dwarf inlining" by default.]
  (rust-lang/rust#106709)
- [Add vendor to Fuchsia's target triple]
  (rust-lang/rust#106429)
- [Enable sanitizers for s390x-linux]
  (rust-lang/rust#107127)

Libraries
---------

- [Loosen the bound on the Debug implementation of Weak.]
  (rust-lang/rust#90291)
- [Make `std::task::Context` !Send and !Sync]
  (rust-lang/rust#95985)
- [PhantomData layout guarantees]
  (rust-lang/rust#104081)
- [Don't derive Debug for `OnceWith` & `RepeatWith`]
  (rust-lang/rust#104163)
- [Implement DerefMut for PathBuf]
  (rust-lang/rust#105018)
- [Add O(1) `Vec -> VecDeque` conversion guarantee]
  (rust-lang/rust#105128)
- [Leak amplification for peek_mut() to ensure BinaryHeap's invariant
  is always met]
  (rust-lang/rust#105851)

Stabilized APIs
---------------

- [`{core,std}::pin::pin!`]
  (https://doc.rust-lang.org/stable/std/pin/macro.pin.html)
- [`impl From<bool> for {f32,f64}`]
  (https://doc.rust-lang.org/stable/std/primitive.f32.html#impl-From%3Cbool%3E-for-f32)
- [`std::path::MAIN_SEPARATOR_STR`]
  (https://doc.rust-lang.org/stable/std/path/constant.MAIN_SEPARATOR_STR.html)
- [`impl DerefMut for PathBuf`]
  (https://doc.rust-lang.org/stable/std/path/struct.PathBuf.html#impl-DerefMut-for-PathBuf)

These APIs are now stable in const contexts:

- [`VecDeque::new`]
  (https://doc.rust-lang.org/stable/std/collections/struct.VecDeque.html#method.new)

Cargo
-----

- [Stabilize sparse registry support for crates.io]
  (rust-lang/cargo#11224)
- [`cargo build --verbose` tells you more about why it recompiles.]
  (rust-lang/cargo#11407)
- [Show progress of crates.io index update even `net.git-fetch-with-cli`
  option enabled]
  (rust-lang/cargo#11579)

Misc
----

Compatibility Notes
-------------------

- [Add `SEMICOLON_IN_EXPRESSIONS_FROM_MACROS` to future-incompat report]
  (rust-lang/rust#103418)
- [Only specify `--target` by default for `-Zgcc-ld=lld` on wasm]
  (rust-lang/rust#101792)
- [Bump `IMPLIED_BOUNDS_ENTAILMENT` to Deny + ReportNow]
  (rust-lang/rust#106465)
- [`std::task::Context` no longer implements Send and Sync]
  (rust-lang/rust#95985)

nternal Changes
----------------

These changes do not affect any public interfaces of Rust, but they represent
significant improvements to the performance or internals of rustc and related
tools.

- [Encode spans relative to the enclosing item]
  (rust-lang/rust#84762)
- [Don't normalize in AstConv]
  (rust-lang/rust#101947)
- [Find the right lower bound region in the scenario of partial order relations]
  (rust-lang/rust#104765)
- [Fix impl block in const expr]
  (rust-lang/rust#104889)
- [Check ADT fields for copy implementations considering regions]
  (rust-lang/rust#105102)
- [rustdoc: simplify JS search routine by not messing with lev distance]
  (rust-lang/rust#105796)
- [Enable ThinLTO for rustc on `x86_64-pc-windows-msvc`]
  (rust-lang/rust#103591)
- [Enable ThinLTO for rustc on `x86_64-apple-darwin`]
  (rust-lang/rust#103647)

Version 1.67.0 (2023-01-26)
==========================

Language
--------

- [Make `Sized` predicates coinductive, allowing cycles.]
  (rust-lang/rust#100386)
- [`#[must_use]` annotations on `async fn` also affect the
  `Future::Output`.] (rust-lang/rust#100633)
- [Elaborate supertrait obligations when deducing closure signatures.]
  (rust-lang/rust#101834)
- [Invalid literals are no longer an error under `cfg(FALSE)`.]
  (rust-lang/rust#102944)
- [Unreserve braced enum variants in value namespace.]
  (rust-lang/rust#103578)

Compiler
--------

- [Enable varargs support for calling conventions other than `C`
  or `cdecl`.] (rust-lang/rust#97971)
- [Add new MIR constant propagation based on dataflow analysis.]
  (rust-lang/rust#101168)
- [Optimize field ordering by grouping m\*2^n-sized fields with
  equivalently aligned ones.] (rust-lang/rust#102750)
- [Stabilize native library modifier `verbatim`.]
  (rust-lang/rust#104360)

Added and removed targets:

- [Add a tier 3 target for PowerPC on AIX]
  (rust-lang/rust#102293), `powerpc64-ibm-aix`.
- [Add a tier 3 target for the Sony PlayStation 1]
  (rust-lang/rust#102689), `mipsel-sony-psx`.
- [Add tier 3 `no_std` targets for the QNX Neutrino RTOS]
  (rust-lang/rust#102701),
  `aarch64-unknown-nto-qnx710` and `x86_64-pc-nto-qnx710`.
- [Remove tier 3 `linuxkernel` targets]
  (rust-lang/rust#104015) (not used by the
  actual kernel).

Refer to Rust's [platform support page][platform-support-doc]
for more information on Rust's tiered platform support.

Libraries
---------

- [Merge `crossbeam-channel` into `std::sync::mpsc`.]
  (rust-lang/rust#93563)
- [Fix inconsistent rounding of 0.5 when formatted to 0 decimal places.]
  (rust-lang/rust#102935)
- [Derive `Eq` and `Hash` for `ControlFlow`.]
  (rust-lang/rust#103084)
- [Don't build `compiler_builtins` with `-C panic=abort`.]
  (rust-lang/rust#103786)

Stabilized APIs
---------------

- [`{integer}::checked_ilog`]
  (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.checked_ilog)
- [`{integer}::checked_ilog2`]
  (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.checked_ilog2)
- [`{integer}::checked_ilog10`]
  (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.checked_ilog10)
- [`{integer}::ilog`]
  (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.ilog)
- [`{integer}::ilog2`]
  (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.ilog2)
- [`{integer}::ilog10`]
  (https://doc.rust-lang.org/stable/std/primitive.i32.html#method.ilog10)
- [`NonZeroU*::ilog2`]
  (https://doc.rust-lang.org/stable/std/num/struct.NonZeroU32.html#method.ilog2)
- [`NonZeroU*::ilog10`]
  (https://doc.rust-lang.org/stable/std/num/struct.NonZeroU32.html#method.ilog10)
- [`NonZero*::BITS`]
  (https://doc.rust-lang.org/stable/std/num/struct.NonZeroU32.html#associatedconstant.BITS)

These APIs are now stable in const contexts:

- [`char::from_u32`]
  (https://doc.rust-lang.org/stable/std/primitive.char.html#method.from_u32)
- [`char::from_digit`]
  (https://doc.rust-lang.org/stable/std/primitive.char.html#method.from_digit)
- [`char::to_digit`]
  (https://doc.rust-lang.org/stable/std/primitive.char.html#method.to_digit)
- [`core::char::from_u32`]
  (https://doc.rust-lang.org/stable/core/char/fn.from_u32.html)
- [`core::char::from_digit`]
  (https://doc.rust-lang.org/stable/core/char/fn.from_digit.html)

Compatibility Notes
-------------------

- [The layout of `repr(Rust)` types now groups m\*2^n-sized fields
  with equivalently aligned ones.]
  (rust-lang/rust#102750) This is intended
  to be an optimization, but it is also known to increase type
  sizes in a few cases for the placement of enum tags. As a reminder,
  the layout of `repr(Rust)` types is an implementation detail,
  subject to change.
- [0.5 now rounds to 0 when formatted to 0 decimal places.]
  (rust-lang/rust#102935)
  This makes it consistent with the rest of floating point formatting that
  rounds ties toward even digits.
- [Chains of `&&` and `||` will now drop temporaries from their
  sub-expressions in evaluation order, left-to-right.]
  (rust-lang/rust#103293) Previously, it
  was "twisted" such that the _first_ expression dropped its
  temporaries _last_, after all of the other expressions dropped
  in order.
- [Underscore suffixes on string literals are now a hard error.]
  (rust-lang/rust#103914)
  This has been a future-compatibility warning since 1.20.0.
- [Stop passing `-export-dynamic` to `wasm-ld`.]
  (rust-lang/rust#105405)
- [`main` is now mangled as `__main_void` on `wasm32-wasi`.]
  (rust-lang/rust#105468)
- [Cargo now emits an error if there are multiple registries in
  the configuration with the same index URL.]
  (rust-lang/cargo#10592)

Internal Changes
----------------

These changes do not affect any public interfaces of Rust, but they
represent significant improvements to the performance or internals
of rustc and related tools.

- [Rewrite LLVM's archive writer in Rust.]
  (rust-lang/rust#97485)
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