feat(nvcc): support argument: `--dependency-output` by ZRHann · Pull Request #2708 · mozilla/sccache

ZRHann · 2026-05-13T06:36:03Z

This adds --dependency-output to nvcc::ARGS, which is equivalent to gcc's -MF flag. Both flags map to the same DepArgumentPath variant and follow identical code paths in gcc::parse_arguments().

Without this fix, the file path following --dependency-output is treated as a Raw input file. When the actual .cu source is then seen as a second input, the parser returns CannotCache("multiple input files"), leading to UnhandledCompile and a cache miss.

docs for this flag: https://docs.nvidia.com/cuda/cuda-compiler-driver-nvcc/#dependency-output-file-mf

ZRHann · 2026-05-19T06:20:47Z

@sylvestre Could you take a look when you have time?

ZRHann · 2026-06-01T08:13:00Z

@sylvestre Could you take a look when you have time?

sylvestre · 2026-06-01T08:22:52Z

sorry, i missed your initial ping

CI started!

codecov-commenter · 2026-06-01T08:25:48Z

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.33%. Comparing base (c0db872) to head (451aa43).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2708      +/-   ##
==========================================
- Coverage   74.34%   74.33%   -0.01%     
==========================================
  Files          70       70              
  Lines       39373    39378       +5     
==========================================
+ Hits        29271    29272       +1     
- Misses      10102    10106       +4

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codspeed-hq · 2026-06-01T08:31:50Z

Merging this PR will improve performance by 4.55%

⚠️

Different runtime environments detected

Some benchmarks with significant performance changes were compared across different runtime environments,
which may affect the accuracy of the results.

Open the report in CodSpeed to investigate

⚡ 1 improved benchmark
✅ 59 untouched benchmarks
⏩ 4 skipped benchmarks¹

Performance Changes

	Mode	Benchmark	`BASE`	`HEAD`	Efficiency
⚡	Simulation	`normalize_win_path_typical`	1.6 µs	1.5 µs	+4.55%

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_{Comparing ZRHann:support-dependency-output (451aa43) with main (c0db872)}

4 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

ZRHann · 2026-06-01T08:46:31Z

@codspeedbot explain why this is faster

codspeed-hq · 2026-06-01T08:46:35Z

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….0) (#36) This PR contains the following updates: | Package | Update | Change | |---|---|---| | [mozilla/sccache](https://github.com/mozilla/sccache) | minor | `0.15.0` → `0.16.0` | --- ### Release Notes <details> <summary>mozilla/sccache (mozilla/sccache)</summary> ### [`v0.16.0`](https://github.com/mozilla/sccache/releases/tag/v0.16.0) [Compare Source](mozilla/sccache@v0.15.0...v0.16.0) ##### sccache 0.16.0 ##### Summary sccache 0.16.0 is a smaller, stabilizing release on top of 0.15.0's multi-tier caching work, with a few new capabilities: - **Read-only backends**: Any storage backend can now be marked read-only, not just a select few ([#2705](mozilla/sccache#2705)). - **Remote execution on aarch64**: Distributed/remote execution now works on Linux aarch64, including fixes for `ldd` output parsing and toolchain packaging on non-x86\_64 Linux ([#2668](mozilla/sccache#2668)). - **CUDA**: `nvcc`'s `--dependency-output` argument is now handled ([#2708](mozilla/sccache#2708)). - **Resilience**: Fall back to a direct cache write when tempfile creation on the same filesystem fails ([#2369](mozilla/sccache#2369)), and give a meaningful error when a multi-level chain references a backend that wasn't compiled in ([#2695](mozilla/sccache#2695)). - **Client efficiency**: The client and dist-client now use a single-threaded tokio runtime, avoiding a thread explosion when many short-lived clients run on many-core hosts ([#2704](mozilla/sccache#2704)). - **Correctness**: Strip `SCCACHE_BASEDIRS` from escaped-backslash paths on Windows ([#2736](mozilla/sccache#2736)), ignore empty-set environment values in config ([#2639](mozilla/sccache#2639)), and avoid the sccache wrapper when resolving the real compiler ([#2720](mozilla/sccache#2720)). - **Security/logging**: JWT keys and cert digests are now base64-encoded in logs ([#2712](mozilla/sccache#2712)), plus general logging improvements ([#2734](mozilla/sccache#2734)). Welcome to 4 new contributors! ##### Features - feat: all backends support making them as read-only by [@AJIOB](https://github.com/AJIOB) in [#2705](mozilla/sccache#2705) - Enable RE on Linux-aarch64 by [@malfet](https://github.com/malfet) in [#2668](mozilla/sccache#2668) - feat(nvcc): support argument: `--dependency-output` by [@ZRHann](https://github.com/ZRHann) in [#2708](mozilla/sccache#2708) - feat: avoid sccache wrapper when resolving compiler by [@iTrooz](https://github.com/iTrooz) in [#2720](mozilla/sccache#2720) - Fall back to direct cache write if tempfile creation on the same fs fails by [@myzhang1029](https://github.com/myzhang1029) in [#2369](mozilla/sccache#2369) - Don't wait depfiles for gcc/clang preprocessed inputs by [@AJIOB](https://github.com/AJIOB) in [#2665](mozilla/sccache#2665) ##### Fixes - fix: strip SCCACHE\_BASEDIRS from escaped-backslash paths on Windows by [@rconde01](https://github.com/rconde01) in [#2736](mozilla/sccache#2736) - fix: ignore empty-set environment values for config by [@AJIOB](https://github.com/AJIOB) in [#2639](mozilla/sccache#2639) - fix: handle disabled cache backend features in multilevel chain by [@cryptomilk](https://github.com/cryptomilk) in [#2695](mozilla/sccache#2695) - fix: use single-threaded tokio runtime in sccache (dist-)client by [@AJIOB](https://github.com/AJIOB) in [#2704](mozilla/sccache#2704) - fix: add newline when printing dist-status to stdout by [@iTrooz](https://github.com/iTrooz) in [#2710](mozilla/sccache#2710) ##### Logging - chore: encode jwt key and cert digest with base64 in logs by [@iTrooz](https://github.com/iTrooz) in [#2712](mozilla/sccache#2712) - Slightly improve logging by [@glandium](https://github.com/glandium) in [#2734](mozilla/sccache#2734) ##### Cleanup - chore: make clippy happy by [@AJIOB](https://github.com/AJIOB) in [#2727](mozilla/sccache#2727) - Extract new\_client\_runtime() helper to DRY up client runtime creation by [@sylvestre](https://github.com/sylvestre) in [#2744](mozilla/sccache#2744) ##### New Contributors - [@ZRHann](https://github.com/ZRHann) made their first contribution in [#2708](mozilla/sccache#2708) - [@myzhang1029](https://github.com/myzhang1029) made their first contribution in [#2369](mozilla/sccache#2369) - [@malfet](https://github.com/malfet) made their first contribution in [#2668](mozilla/sccache#2668) - [@rconde01](https://github.com/rconde01) made their first contribution in [#2736](mozilla/sccache#2736) **Full Changelog**: <mozilla/sccache@v0.15.0...v0.16.0> </details> --- ### Configuration 📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined). 🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied. ♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox. 🔕 **Ignore**: Close this PR and you won't be reminded about this update again. --- - [ ] If you want to rebase/retry this PR, check this box --- This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).  Reviewed-on: https://codeberg.org/towonel/towonel/pulls/36

ZRHann added 4 commits May 13, 2026 15:39

feat(nvcc): support argument

396c941

fix order

d31a76d

rm debug code

cccaabb

rm comment

451aa43

ZRHann force-pushed the support-dependency-output branch from 76c0b68 to 451aa43 Compare May 13, 2026 07:41

sylvestre merged commit 6a6b4c2 into mozilla:main Jun 1, 2026
52 checks passed

BrewTestBot mentioned this pull request Jun 19, 2026

sccache 0.16.0 Homebrew/homebrew-core#288823

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feat(nvcc): support argument: `--dependency-output`#2708

feat(nvcc): support argument: `--dependency-output`#2708
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Merging this PR will improve performance by 4.55%

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