Fix build compatibility with macOS 26 and Apple Clang 21 by ikkoham · Pull Request #4295 · NVIDIA/cuda-quantum

ikkoham · 2026-04-10T04:38:46Z

Summary

macOS 26 (Tahoe) SDK removed __has_builtin guards from libc++ headers (e.g., __builtin_ctzg, __is_nothrow_convertible), making them incompatible with LLVM 16's clang. Additionally, Apple Clang 21 introduced new warnings that break the build under -Werror.

This PR fixes both issues so that CUDA-Q builds and passes all tests on macOS 26 with Apple Clang 21.

LLVM libc++ runtimes (SDK 26+)

set_env_defaults.sh: Auto-detect active SDK version via xcrun --show-sdk-version. When SDK >= 26, include runtimes in LLVM_PROJECTS to build LLVM's own libc++.
cudaq-quake.cpp: Use -nostdinc++ to suppress SDK C++ headers when LLVM's libc++ is available, while keeping -isysroot for C standard headers.
nvq++.in: Add -Wl,-syslibroot for ld64.lld to find libSystem in the SDK. Add -lc++abi during final link when LLVM's libc++abi is present.
build_llvm.sh: Do not bake SDK sysroot paths into clang++.cfg on macOS (they become stale after Xcode updates). Sysroot is resolved at runtime by nvq++.

Relocatable linking

nvq++.in: LLVM 16's ld64.lld does not implement -r (relocatable linking). Probe the configured linker and fall back to system ld for the object merge step if needed.
device_call.cpp: Update FileCheck pattern to match both Apple ld and ld64.lld error formats.

Apple Clang 21 warnings

CMakeLists.txt: Add -Wno-character-conversion for gtest (third-party).
server_impl/CMakeLists.txt: Add -Wno-deprecated-literal-operator for Crow (third-party).
cudaq.cpp: Fix -Wnontrivial-memcall on memset with std::vector<bool>.
vqe_tester.cpp: Add missing #pragma to suppress -Wdeprecated-declarations for backward-compatibility test (matching existing pattern in builder_tester.cpp).

Signed-off-by: ikkoham <ikkoham@users.noreply.github.com>

copy-pr-bot · 2026-04-10T04:38:49Z

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sacpis · 2026-04-10T04:48:24Z

/ok to test d9566e7

Command Bot: Processing...

github-actions · 2026-04-10T08:09:36Z

CUDA Quantum Docs Bot: A preview of the documentation can be found here.

I, ikkoham <ikkoham@users.noreply.github.com>, hereby add my Signed-off-by to this commit: 0ece0b6 Signed-off-by: ikkoham <ikkoham@users.noreply.github.com>

sacpis · 2026-04-20T04:00:41Z

/ok to test b53ad52

Command Bot: Processing...

github-actions · 2026-04-20T08:03:43Z

CUDA Quantum Docs Bot: A preview of the documentation can be found here.

taalexander · 2026-04-23T12:21:03Z

Thanks for putting this together Ikko. I don't have my macOS machine with me this week but will test and review next week.

taalexander

LGTM. I've pushed some CI enhancements that I'll try and use to make sure we can test with the latest Xcodes. I'll try and push this along.

taalexander · 2026-05-04T17:09:02Z

/ok to test 96e1973

Command Bot: Processing...

github-actions · 2026-05-04T20:03:41Z

CI Summary — ❌ failed

Run #25332345348 · trigger push · ✅ 5 · ⏩ 7 · ❌ 1 · ⛔ 0

❌ Failed or cancelled

Job	Result	Link
`build_and_test`	❌ failure	view

Top-level jobs (13)

Job	Result
`binaries`	⏩ skipped
`build_and_test`	❌ failure
`config_devdeps`	✅ success
`config_source_build`	⏩ skipped
`config_wheeldeps`	✅ success
`devdeps`	✅ success
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`metadata`	✅ success
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`source_build`	⏩ skipped
`wheeldeps`	✅ success

⏩ Skipped jobs (7) — intentionally skipped on PR builds; run on merge_group / workflow_dispatch

Job
`binaries`
`config_source_build`
`docker_image`
`gen_code_coverage`
`python_metapackages`
`python_wheels`
`source_build`

All sub-jobs (50) — every matrix leg, with links

Job	Status	Link
Build and test (amd64, clang16, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, clang16, openmpi) / Dev environment (Python)	✅ success	view
Build and test (amd64, gcc11, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, gcc11, openmpi) / Dev environment (Python)	✅ success	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Debug)	❌ failure	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Python)	✅ success	view
Build and test (arm64, clang16, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (arm64, clang16, openmpi) / Dev environment (Python)	✅ success	view
CI Summary	❔ in_progress	view
Configure build (devdeps)	✅ success	view
Configure build (source_build)	⏩ skipped	view
Configure build (wheeldeps)	✅ success	view
Create CUDA Quantum installer	⏩ skipped	view
Create Docker images	⏩ skipped	view
Create Python metapackages	⏩ skipped	view
Create Python wheels	⏩ skipped	view
Gen code coverage	⏩ skipped	view
Load dependencies (amd64, clang16) / Caching	✅ success	view
Load dependencies (amd64, clang16) / Finalize	✅ success	view
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Prepare cache clean-up	✅ success	view
Retrieve PR info	✅ success	view

⚠️ Required checks (7/8) — 1 missing — declared in .github/required-checks.yml for push

Required check	Status	Link
Build and test (amd64, clang16, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, clang16, openmpi) / Dev environment (Python)	✅ success	view
Build and test (amd64, gcc11, openmpi) / Dev environment (Debug)	✅ success	view
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Build and test (amd64, gcc12, openmpi) / Dev environment (Debug)	❌ failure	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Python)	✅ success	view
Build and test (arm64, clang16, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (arm64, clang16, openmpi) / Dev environment (Python)	✅ success	view

taalexander · 2026-05-05T16:56:53Z

/ok to test 2ede9fb

Command Bot: Processing...

github-actions · 2026-05-05T20:38:20Z

CI Summary (`push`) — ✅ passed

Run #25512795789 · ✅ 6 · ⏩ 7 · ❌ 0 · ⛔ 0

Top-level jobs (13)

Job	Result
`binaries`	⏩ skipped
`build_and_test`	✅ success
`config_devdeps`	✅ success
`config_source_build`	⏩ skipped
`config_wheeldeps`	✅ success
`devdeps`	✅ success
`docker_image`	⏩ skipped
`gen_code_coverage`	⏩ skipped
`metadata`	✅ success
`python_metapackages`	⏩ skipped
`python_wheels`	⏩ skipped
`source_build`	⏩ skipped
`wheeldeps`	✅ success

⏩ Skipped jobs (7) — intentionally skipped on PR builds; run on merge_group / workflow_dispatch

Job
`binaries`
`config_source_build`
`docker_image`
`gen_code_coverage`
`python_metapackages`
`python_wheels`
`source_build`

All sub-jobs (42) — every matrix leg, with links

Job	Status	Link
Build and test (amd64, gcc12, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Python)	✅ success	view
Build and test (amd64, llvm, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, llvm, openmpi) / Dev environment (Python)	✅ success	view
Build and test (arm64, llvm, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (arm64, llvm, openmpi) / Dev environment (Python)	✅ success	view
CI Summary	❔ in_progress	view
Configure build (devdeps)	✅ success	view
Configure build (source_build)	⏩ skipped	view
Configure build (wheeldeps)	✅ success	view
Create CUDA Quantum installer	⏩ skipped	view
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Create Python metapackages	⏩ skipped	view
Create Python wheels	⏩ skipped	view
Gen code coverage	⏩ skipped	view
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Load wheel dependencies (amd64, 12.6) / Caching	✅ success	view
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Load wheel dependencies (amd64, 13.0) / Caching	✅ success	view
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Load wheel dependencies (arm64, 12.6) / Caching	✅ success	view
Load wheel dependencies (arm64, 12.6) / Finalize	✅ success	view
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Load wheel dependencies (arm64, 13.0) / Caching	✅ success	view
Load wheel dependencies (arm64, 13.0) / Finalize	✅ success	view
Load wheel dependencies (arm64, 13.0) / Metadata	✅ success	view
Prepare cache clean-up	✅ success	view
Retrieve PR info	✅ success	view

✅ Required checks (6/6) — declared in .github/required-checks.yml for push

Required check	Status	Link
Build and test (amd64, llvm, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, llvm, openmpi) / Dev environment (Python)	✅ success	view
Build and test (arm64, llvm, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (arm64, llvm, openmpi) / Dev environment (Python)	✅ success	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Python)	✅ success	view

taalexander · 2026-05-06T22:34:44Z

/ok to test 479e809

Command Bot: Processing...

Signed-off-by: ikkoham <ikkoham@users.noreply.github.com>

Use a local composite action to pick the newest non-beta Xcode and log the selected toolchain so macOS CI follows runner image updates. Include the selected Xcode in the dev environment cache key and let set_env_defaults.sh choose LLVM projects. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

Signed-off-by: Thomas Alexander <talexander@nvidia.com>

LLVM 22 works with current macOS SDK libc++ headers, so keep bundled runtimes opt-in and let the macOS devdeps cache track LLVM cache changes. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

Keep the macOS LLVM project default focused on the active build behavior without documenting an SDK runtimes workaround that no longer applies. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

Accept the Apple linker diagnostic shape and pass nvq++ target options before the output path so CI checks the intended failure. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

taalexander · 2026-05-07T12:50:53Z

/ok to test ad021c0

Command Bot: Processing...

Base cache upload decisions on compile miss rate instead of cache file growth so warm PR reruns refresh caches when many compilations missed. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

taalexander · 2026-05-07T17:52:35Z

/ok to test f4a05e1

Command Bot: Processing...

mitchdz

Overall changes look fine to me. The only question I have is in the description. The description talks about auto detecting the SDK in set_env_defaults.sh‎, but I don't see that change. Was that written and then removed later?

taalexander · 2026-05-07T20:24:08Z

Thanks @mitchdz, that was in @ikkoham's initial changes but after some trial and error I found that to not be required after the LLVM 22 update (I can also verify it was needed before).

github-actions · 2026-05-08T01:57:20Z

CI Summary (`merge_group`) — ✅ passed

Run #25520376688 · ✅ 13 · ⏩ 0 · ❌ 0 · ⛔ 0

Top-level jobs (13)

Job	Result
`binaries`	✅ success
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`config_source_build`	✅ success
`config_wheeldeps`	✅ success
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`metadata`	✅ success
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All sub-jobs (178) — every matrix leg, with links

Job	Status	Link
Build and test (amd64, gcc12, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Python)	✅ success	view
Build and test (amd64, llvm, openmpi) / Dev environment (Debug)	✅ success	view
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CI Summary	❔ in_progress	view
Configure build (devdeps)	✅ success	view
Configure build (source_build)	✅ success	view
Configure build (wheeldeps)	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Build CUDA Quantum assets	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Minimal OpenMPI installation	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Prepare cache clean-up	✅ success	view
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Create CUDA Quantum installer (amd64, 12.6) / Validate installer (ubuntu:22.04)	✅ success	view
Create CUDA Quantum installer (amd64, 13.0) / Build CUDA Quantum assets	✅ success	view
Create CUDA Quantum installer (amd64, 13.0) / Minimal OpenMPI installation	✅ success	view
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Create CUDA Quantum installer (arm64, 13.0) / Build CUDA Quantum assets	✅ success	view
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Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (debian:12, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (fedora:42)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (fedora:42, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (redhat/ubi8:8.10)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (redhat/ubi8:8.10, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (redhat/ubi9:9.6)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (redhat/ubi9:9.6, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (ubuntu:22.04)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (ubuntu:22.04, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Build Python 3.11 wheel	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Prepare validation	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Staging	⏩ skipped	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (debian:12)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (debian:12, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (fedora:42)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (fedora:42, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (redhat/ubi8:8.10)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (redhat/ubi8:8.10, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (redhat/ubi9:9.6)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (redhat/ubi9:9.6, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (ubuntu:22.04)	✅ success	view
Create Python wheels (arm64, 3.11, 13.0) / Validate wheel (ubuntu:22.04, --user)	✅ success	view
Create Python wheels (arm64, 3.13, 12.6) / Build Python 3.13 wheel	✅ success	view
Create Python wheels (arm64, 3.13, 12.6) / Prepare validation	✅ success	view
Create Python wheels (arm64, 3.13, 12.6) / Staging	⏩ skipped	view
Create Python wheels (arm64, 3.13, 12.6) / Validate wheel (fedora:42)	✅ success	view
Create Python wheels (arm64, 3.13, 12.6) / Validate wheel (fedora:42, --user)	✅ success	view
Create Python wheels (arm64, 3.13, 13.0) / Build Python 3.13 wheel	✅ success	view
Create Python wheels (arm64, 3.13, 13.0) / Prepare validation	✅ success	view
Create Python wheels (arm64, 3.13, 13.0) / Staging	⏩ skipped	view
Create Python wheels (arm64, 3.13, 13.0) / Validate wheel (fedora:42)	✅ success	view
Create Python wheels (arm64, 3.13, 13.0) / Validate wheel (fedora:42, --user)	✅ success	view
Gen code coverage (amd64) / gen_code_coverage	✅ success	view
Load dependencies (amd64, gcc12) / Caching	✅ success	view
Load dependencies (amd64, gcc12) / Finalize	✅ success	view
Load dependencies (amd64, gcc12) / Metadata	✅ success	view
Load dependencies (amd64, llvm) / Caching	✅ success	view
Load dependencies (amd64, llvm) / Finalize	✅ success	view
Load dependencies (amd64, llvm) / Metadata	✅ success	view
Load dependencies (arm64, gcc12) / Caching	✅ success	view
Load dependencies (arm64, gcc12) / Finalize	✅ success	view
Load dependencies (arm64, gcc12) / Metadata	✅ success	view
Load dependencies (arm64, llvm) / Caching	✅ success	view
Load dependencies (arm64, llvm) / Finalize	✅ success	view
Load dependencies (arm64, llvm) / Metadata	✅ success	view
Load source build cache (amd64, 12.6) / Caching	✅ success	view
Load source build cache (amd64, 12.6) / Finalize	✅ success	view
Load source build cache (amd64, 12.6) / Metadata	✅ success	view
Load source build cache (amd64, 13.0) / Caching	✅ success	view
Load source build cache (amd64, 13.0) / Finalize	✅ success	view
Load source build cache (amd64, 13.0) / Metadata	✅ success	view
Load source build cache (arm64, 12.6) / Caching	✅ success	view
Load source build cache (arm64, 12.6) / Finalize	✅ success	view
Load source build cache (arm64, 12.6) / Metadata	✅ success	view
Load source build cache (arm64, 13.0) / Caching	✅ success	view
Load source build cache (arm64, 13.0) / Finalize	✅ success	view
Load source build cache (arm64, 13.0) / Metadata	✅ success	view
Load wheel dependencies (amd64, 12.6) / Caching	✅ success	view
Load wheel dependencies (amd64, 12.6) / Finalize	✅ success	view
Load wheel dependencies (amd64, 12.6) / Metadata	✅ success	view
Load wheel dependencies (amd64, 13.0) / Caching	✅ success	view
Load wheel dependencies (amd64, 13.0) / Finalize	✅ success	view
Load wheel dependencies (amd64, 13.0) / Metadata	✅ success	view
Load wheel dependencies (arm64, 12.6) / Caching	✅ success	view
Load wheel dependencies (arm64, 12.6) / Finalize	✅ success	view
Load wheel dependencies (arm64, 12.6) / Metadata	✅ success	view
Load wheel dependencies (arm64, 13.0) / Caching	✅ success	view
Load wheel dependencies (arm64, 13.0) / Finalize	✅ success	view
Load wheel dependencies (arm64, 13.0) / Metadata	✅ success	view
Prepare cache clean-up	✅ success	view
Retrieve PR info	✅ success	view

✅ Required checks (39/39) — declared in .github/required-checks.yml for merge_group

Required check	Status	Link
Build and test (amd64, llvm, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, llvm, openmpi) / Dev environment (Python)	✅ success	view
Build and test (arm64, llvm, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (arm64, llvm, openmpi) / Dev environment (Python)	✅ success	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (amd64, gcc12, openmpi) / Dev environment (Python)	✅ success	view
Build and test (arm64, gcc12, openmpi) / Dev environment (Debug)	✅ success	view
Build and test (arm64, gcc12, openmpi) / Dev environment (Python)	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Build CUDA Quantum assets	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Minimal OpenMPI installation	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Validate installer (debian:12)	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Validate installer (fedora:42)	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Validate installer (opensuse/leap:15.5)	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Validate installer (redhat/ubi9:9.6)	✅ success	view
Create CUDA Quantum installer (amd64, 12.6) / Validate installer (ubuntu:22.04)	✅ success	view
Create CUDA Quantum installer (arm64, 12.6) / Build CUDA Quantum assets	✅ success	view
Create CUDA Quantum installer (arm64, 12.6) / Minimal OpenMPI installation	✅ success	view
Create CUDA Quantum installer (arm64, 12.6) / Validate installer (redhat/ubi9:9.6)	✅ success	view
Create CUDA Quantum installer (arm64, 12.6) / Validate installer (ubuntu:22.04)	✅ success	view
Create Docker images (amd64) / Documentation	✅ success	view
Create Docker images (amd64) / Validation	✅ success	view
Create Docker images (arm64) / Validation	✅ success	view
Create Python metapackages / Build Python metapackages	✅ success	view
Create Python metapackages / Test Python metapackages (3.11)	✅ success	view
Create Python metapackages / Test Python metapackages (3.13)	✅ success	view
Create Python metapackages / Test Python metapackages (12.6, 3.11)	✅ success	view
Create Python metapackages / Test Python metapackages (12.6, 3.13)	✅ success	view
Create Python wheels (amd64, 3.11, 12.6) / Validate wheel (debian:12, --user)	✅ success	view
Create Python wheels (amd64, 3.11, 12.6) / Validate wheel (debian:12)	✅ success	view
Create Python wheels (amd64, 3.11, 12.6) / Validate wheel (fedora:42, --user)	✅ success	view
Create Python wheels (amd64, 3.11, 12.6) / Validate wheel (fedora:42)	✅ success	view
Create Python wheels (amd64, 3.11, 12.6) / Validate wheel (redhat/ubi8:8.10, --user)	✅ success	view
Create Python wheels (amd64, 3.11, 12.6) / Validate wheel (redhat/ubi8:8.10)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (debian:12, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (debian:12)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (fedora:42, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (fedora:42)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (redhat/ubi8:8.10, --user)	✅ success	view
Create Python wheels (arm64, 3.11, 12.6) / Validate wheel (redhat/ubi8:8.10)	✅ success	view

Fix build compatibility with macOS 26 and Apple Clang 21

1e21c6f

Signed-off-by: ikkoham <ikkoham@users.noreply.github.com>

Merge branch 'main' into fix/macos-26-apple-clang-21-compat

d9566e7

github-actions Bot pushed a commit that referenced this pull request Apr 10, 2026

Docs preview for PR #4295.

d0406b1

ikkoham added 3 commits April 14, 2026 11:47

Guard clang-specific warning suppressions

0ece0b6

DCO Remediation Commit for ikkoham <ikkoham@users.noreply.github.com>

36dcdcd

I, ikkoham <ikkoham@users.noreply.github.com>, hereby add my Signed-off-by to this commit: 0ece0b6 Signed-off-by: ikkoham <ikkoham@users.noreply.github.com>

Merge branch 'main' into fix/macos-26-apple-clang-21-compat

c6697d5

github-actions Bot pushed a commit that referenced this pull request Apr 20, 2026

Docs preview for PR #4295.

343f086

william-quanscient mentioned this pull request Apr 23, 2026

python kernel_builder qalloc call very slow for numpy arrays for 25+ qubits #3543

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taalexander self-requested a review April 23, 2026 12:20

taalexander requested review from 1tnguyen, bettinaheim, bmhowe23 and mitchdz as code owners May 4, 2026 16:47

taalexander approved these changes May 4, 2026

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taalexander force-pushed the fix/macos-26-apple-clang-21-compat branch from d08c600 to 96e1973 Compare May 4, 2026 17:00

taalexander force-pushed the fix/macos-26-apple-clang-21-compat branch from ccbc6c6 to 2ede9fb Compare May 5, 2026 16:43

taalexander and others added 3 commits May 7, 2026 09:27

Merge branch 'main' into fix/macos-26-apple-clang-21-compat

d9a2a1e

Fix macOS mktemp probe for nvq++

2703163

Signed-off-by: ikkoham <ikkoham@users.noreply.github.com>

taalexander added 4 commits May 7, 2026 09:27

Add runtime macos sdk correction.

0f96fef

Signed-off-by: Thomas Alexander <talexander@nvidia.com>

Avoid default LLVM runtimes on macOS

6730905

LLVM 22 works with current macOS SDK libc++ headers, so keep bundled runtimes opt-in and let the macOS devdeps cache track LLVM cache changes. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

Remove obsolete macOS runtimes note

a3aa8ad

Keep the macOS LLVM project default focused on the active build behavior without documenting an SDK runtimes workaround that no longer applies. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

Fix macOS device_call lit expectation

ad021c0

Accept the Apple linker diagnostic shape and pass nvq++ target options before the output path so CI checks the intended failure. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

taalexander force-pushed the fix/macos-26-apple-clang-21-compat branch from 479e809 to ad021c0 Compare May 7, 2026 12:43

Use ccache miss rate for push threshold

f4a05e1

Base cache upload decisions on compile miss rate instead of cache file growth so warm PR reruns refresh caches when many compilations missed. Signed-off-by: Thomas Alexander <talexander@nvidia.com>

mitchdz approved these changes May 7, 2026

View reviewed changes

taalexander enabled auto-merge May 7, 2026 20:24

taalexander added this pull request to the merge queue May 7, 2026

Merged via the queue into NVIDIA:main with commit aead6b6 May 8, 2026
94 of 96 checks passed

github-actions Bot pushed a commit that referenced this pull request May 8, 2026

Cleaning up docs preview for PR #4295.

4551950

ikkoham deleted the fix/macos-26-apple-clang-21-compat branch May 8, 2026 04:18

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ikkoham commented Apr 10, 2026

Summary

LLVM libc++ runtimes (SDK 26+)

Relocatable linking

Apple Clang 21 warnings

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