From c1e23615b5b7e6ad2601474bf0064b8a9b27ac74 Mon Sep 17 00:00:00 2001
From: Claude <claude@anthropic.com>
Date: Thu, 13 Aug 2026 10:35:11 +0000
Subject: [PATCH] fix: remove CUB_WRAPPED_NAMESPACE and _CCCL_COMPILER_GCC from
 build flags
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CUB_WRAPPED_NAMESPACE=cccl_preload wraps cub into cccl_preload::cub
but cccl_allocator_preload.cu uses bare cub:: — compilation fails.
_CCCL_COMPILER_GCC=1 conflicts with CCCL auto-detection (redefined warning).

Drop both. CUB_DISABLE_NAMESPACE_MAGIC alone is sufficient.
---
 qwen3_6_scripts/cccl_preload/build_cccl_preload.sh | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/qwen3_6_scripts/cccl_preload/build_cccl_preload.sh b/qwen3_6_scripts/cccl_preload/build_cccl_preload.sh
index b97fde7c..30149448 100755
--- a/qwen3_6_scripts/cccl_preload/build_cccl_preload.sh
+++ b/qwen3_6_scripts/cccl_preload/build_cccl_preload.sh
@@ -72,11 +72,9 @@ COMMON_FLAGS=(
     # Suppress CCCL warnings that don't affect correctness
     -Wno-unused-function
     -Wno-unknown-pragmas
-    # CUB needs these for non-NVCC compilers
-    -D_CCCL_COMPILER_GCC=1
+    # CUB needs this for non-NVCC compilers
     -D__CUDA_ARCH_LIST__=700
     -DCUB_DISABLE_NAMESPACE_MAGIC
-    -DCUB_WRAPPED_NAMESPACE=cccl_preload
 )
 
 if [[ "${CXX}" == *clang++* ]]; then