Avoid issues with nvcc compilation in c++ mode by miscco · Pull Request #3770 · NVIDIA/cccl

miscco · 2025-02-11T16:06:10Z

We were simply using _CCCL_HAS_CUDA_COMPILER and that is not sufficient to assume cuda compilation

But a bandaid on it so everything works again and then work on a proper fix

griwes

As a bandaid this is fine.

fbusato · 2025-02-11T17:45:18Z

libcudacxx/include/cuda/std/__cstdlib/malloc.h


-#if _CCCL_HAS_CUDA_COMPILER
+// We need to ensure that we not only compile with a cuda compiler but also compile cuda source files
+#if _CCCL_HAS_CUDA_COMPILER && (defined(__CUDACC__) || defined(_NVHPC_CUDA))


would be possible to add a specific macro for that?

I believe that we need to fix the _CCCL_HAS_CUDA_COMPILER macro

It is meant to signify we are compiling cuda code and we should make sure it actually means that

I'm not really convinced by __CUDACC__ because it is defined when we compile .cu files. __umul64hi condition is more specific, i.e. cuda device code

It was already in a device function so it was properly "guarded" the issue is that we only can consider device functions if we compile for cuda and not only c++

github-actions · 2025-02-11T17:48:27Z

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  🟩 GCC                Pass: 100%/8   | Total:  1h 40m | Avg: 12m 33s | Max: 14m 58s | Hits:  64%/4426  
  🟩 MSVC               Pass: 100%/2   | Total: 20m 52s | Avg: 10m 26s | Max: 10m 42s | Hits:  54%/522   
  🟩 NVHPC              Pass: 100%/2   | Total: 18m 33s | Avg:  9m 16s | Max:  9m 17s | Hits:  41%/706   
🟩 gpu
  🟩 rtx2080            Pass: 100%/20  | Total:  4h 06m | Avg: 12m 20s | Max: 15m 14s | Hits:  62%/10080 
🟩 jobs
  🟩 Build              Pass: 100%/18  | Total:  3h 42m | Avg: 12m 22s | Max: 15m 14s | Hits:  57%/8974  
  🟩 Test               Pass: 100%/2   | Total: 24m 01s | Avg: 12m 00s | Max: 12m 13s | Hits:  99%/1106  
🟩 sm
  🟩 90                 Pass: 100%/1   | Total: 10m 47s | Avg: 10m 47s | Max: 10m 47s | Hits:  58%/553   
  🟩 90a                Pass: 100%/1   | Total:  9m 57s | Avg:  9m 57s | Max:  9m 57s | Hits:  58%/553   
🟩 std
  🟩 17                 Pass: 100%/4   | Total: 43m 20s | Avg: 10m 50s | Max: 12m 08s | Hits:  56%/2012  
  🟩 20                 Pass: 100%/16  | Total:  3h 23m | Avg: 12m 42s | Max: 15m 14s | Hits:  64%/8068

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 13m 21s | Avg: 6m 40s | Max: 10m 49s | Hits: 98%/296

🟩 cpu
  🟩 amd64              Pass: 100%/2   | Total: 13m 21s | Avg:  6m 40s | Max: 10m 49s | Hits:  98%/296   
🟩 ctk
  🟩 12.8               Pass: 100%/2   | Total: 13m 21s | Avg:  6m 40s | Max: 10m 49s | Hits:  98%/296   
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/2   | Total: 13m 21s | Avg:  6m 40s | Max: 10m 49s | Hits:  98%/296   
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/2   | Total: 13m 21s | Avg:  6m 40s | Max: 10m 49s | Hits:  98%/296   
🟩 cxx
  🟩 GCC13              Pass: 100%/2   | Total: 13m 21s | Avg:  6m 40s | Max: 10m 49s | Hits:  98%/296   
🟩 cxx_family
  🟩 GCC                Pass: 100%/2   | Total: 13m 21s | Avg:  6m 40s | Max: 10m 49s | Hits:  98%/296   
🟩 gpu
  🟩 rtx2080            Pass: 100%/2   | Total: 13m 21s | Avg:  6m 40s | Max: 10m 49s | Hits:  98%/296   
🟩 jobs
  🟩 Build              Pass: 100%/1   | Total:  2m 32s | Avg:  2m 32s | Max:  2m 32s | Hits:  97%/148   
  🟩 Test               Pass: 100%/1   | Total: 10m 49s | Avg: 10m 49s | Max: 10m 49s | Hits:  98%/148

🟩 python: Pass: 100%/1 | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s

🟩 cpu
  🟩 amd64              Pass: 100%/1   | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s
🟩 ctk
  🟩 12.8               Pass: 100%/1   | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s
🟩 cudacxx
  🟩 nvcc12.8           Pass: 100%/1   | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s
🟩 cudacxx_family
  🟩 nvcc               Pass: 100%/1   | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s
🟩 cxx
  🟩 GCC13              Pass: 100%/1   | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s
🟩 cxx_family
  🟩 GCC                Pass: 100%/1   | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s
🟩 gpu
  🟩 rtx2080            Pass: 100%/1   | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s
🟩 jobs
  🟩 Test               Pass: 100%/1   | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s

👃 Inspect Changes

Modifications in project?

	Project
	CCCL Infrastructure
+/-	libcu++
	CUB
	Thrust
	CUDA Experimental
	python
	CCCL C Parallel Library
	Catch2Helper

Modifications in project or dependencies?

	Project
	CCCL Infrastructure
+/-	libcu++
+/-	CUB
+/-	Thrust
+/-	CUDA Experimental
+/-	python
+/-	CCCL C Parallel Library
+/-	Catch2Helper

🏃‍ Runner counts (total jobs: 151)

#	Runner
108	`linux-amd64-cpu16`
15	`windows-amd64-cpu16`
10	`linux-arm64-cpu16`
8	`linux-amd64-gpu-rtx2080-latest-1`
6	`linux-amd64-gpu-rtxa6000-latest-1`
3	`linux-amd64-gpu-rtx4090-latest-1`
1	`linux-amd64-gpu-h100-latest-1`

miscco added 2 commits February 11, 2025 17:04

Fix __calloc_device for non cuda compilation

85c11f5

Fix bare __device__

fe3bff9

miscco requested a review from a team as a code owner February 11, 2025 16:06

miscco requested a review from wmaxey February 11, 2025 16:06

griwes approved these changes Feb 11, 2025

View reviewed changes

miscco enabled auto-merge (squash) February 11, 2025 16:25

fbusato approved these changes Feb 11, 2025

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miscco merged commit 8f85257 into NVIDIA:main Feb 11, 2025
165 of 168 checks passed

miscco deleted the fix_cstdlib_not_cuda branch February 11, 2025 17:54

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Avoid issues with nvcc compilation in c++ mode#3770

Avoid issues with nvcc compilation in c++ mode#3770
miscco merged 2 commits intoNVIDIA:mainfrom
miscco:fix_cstdlib_not_cuda

miscco commented Feb 11, 2025

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fbusato Feb 11, 2025

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miscco Feb 11, 2025

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fbusato Feb 11, 2025

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miscco Feb 11, 2025

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github-actions bot commented Feb 11, 2025

🟩 cub: Pass: 100%/44 | Total: 1d 15h | Avg: 54m 11s | Max: 1h 16m | Hits: 65%/52276

🟩 thrust: Pass: 100%/43 | Total: 21h 31m | Avg: 30m 01s | Max: 1h 08m | Hits: 74%/76916

🟩 libcudacxx: Pass: 100%/41 | Total: 11h 05m | Avg: 16m 13s | Max: 33m 16s | Hits: 66%/99689

🟩 cudax: Pass: 100%/20 | Total: 4h 06m | Avg: 12m 20s | Max: 15m 14s | Hits: 62%/10080

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 13m 21s | Avg: 6m 40s | Max: 10m 49s | Hits: 98%/296

🟩 python: Pass: 100%/1 | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s

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🏃‍ Runner counts (total jobs: 151)

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miscco commented Feb 11, 2025

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github-actions bot commented Feb 11, 2025

🟩 cub: Pass: 100%/44 | Total: 1d 15h | Avg: 54m 11s | Max: 1h 16m | Hits: 65%/52276

🟩 thrust: Pass: 100%/43 | Total: 21h 31m | Avg: 30m 01s | Max: 1h 08m | Hits: 74%/76916

🟩 libcudacxx: Pass: 100%/41 | Total: 11h 05m | Avg: 16m 13s | Max: 33m 16s | Hits: 66%/99689

🟩 cudax: Pass: 100%/20 | Total: 4h 06m | Avg: 12m 20s | Max: 15m 14s | Hits: 62%/10080

🟩 cccl_c_parallel: Pass: 100%/2 | Total: 13m 21s | Avg: 6m 40s | Max: 10m 49s | Hits: 98%/296

🟩 python: Pass: 100%/1 | Total: 28m 08s | Avg: 28m 08s | Max: 28m 08s

👃 Inspect Changes

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🏃‍ Runner counts (total jobs: 151)

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