rust/compiler/rustc_codegen_ssa/src/back/command.rs, branch stable

feat(linker): check ARG_MAX on Unix platforms

2025-03-14T13:45:49+00:00

On Unix the limits can be gargantuan anyway so we're pretty unlikely to hit them, but might still exceed it. We consult ARG_MAX here to get an estimate.

fix(linker): use arg list estimate on only Windows

2025-03-14T13:42:18+00:00

Though I doubt anyone running rustc outside Unix/Windows

fix(linker): prevent overflow when estimating CLI arg list length

2025-03-14T13:42:12+00:00

This also updates the estimate on Windows of the length argument list to `saturating_add` to avoid overflow.

fix: remove the check of lld not supporting @response-file

2025-03-12T22:36:21+00:00

In LLVM v9, lld has supported @response-file LLVM v9 was released on 2019-09-19. And the check was added back to 2018-03-14 (1.26.0) via 04442af18bf0. It has been more than five years, and we ship our own lld regardlessly. This should be happily removed. See also: * *

Shorten linker output even more when `--verbose` is not present

2025-01-25T21:04:52+00:00

- Don't show environment variables. Seeing PATH is almost never useful, and it can be extremely long. - For .rlibs in the sysroot, replace crate hashes with a `"-*"` string. This will expand to the full crate name when pasted into the shell. - Move `.rlib` to outside the glob. - Abbreviate the sysroot path to `` wherever it appears in the arguments. This also adds an example of the linker output as a run-make test. Currently it only runs on x86_64-unknown-linux-gnu, because each platform has its own linker arguments. So that it's stable across machines, pass BUILD_ROOT as an argument through compiletest through to run-make tests. - Only use linker-flavor=gnu-cc if we're actually going to compare the output. It doesn't exist on MacOS.

Minimize visibilities.

2024-09-17T06:24:33+00:00

This makes it much clearer which things are used outside the crate.

Reformat `use` declarations.

2024-07-28T22:26:52+00:00

The previous commit updated `rustfmt.toml` appropriately. This commit is the outcome of running `x fmt --all` with the new formatting options.

Update comment and remove special-case for Wasm targets which is incompatible with response-file changes

2024-03-20T23:38:15+00:00

Reduce usage of Symbol in the linker code

2022-06-28T18:38:36+00:00

Interning here doesn't save us anything. It rather costs a bit of time.

Simplify implementation of `-Z gcc-ld`

2022-05-25T20:55:22+00:00

- The logic is now unified for all targets (wasm targets should also be supported now) - Additional "symlink" files like `ld64` are eliminated - lld-wrapper is used for propagating the correct lld flavor - Cleanup "unwrap or exit" logic in lld-wrapper