fix(build): pin CUDA host compiler to GCC ≤ 15 on Linux#57
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CUDA 13.1's cudafe++ cannot parse GCC 16's C++20 standard library headers (char8_t, requires-expressions). The build script now auto- detects the newest available GCC ≤ 15 and sets CMAKE_CUDA_HOST_COMPILER and CUDAHOSTCXX accordingly, falling back gracefully with a warning if none is found. Requires gcc15 on Arch: sudo pacman -S gcc15
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CUDA 13.1's cudafe++ cannot parse GCC 16's C++20 standard library headers (char8_t, requires-expressions). The build script now auto- detects the newest available GCC ≤ 15 and sets CMAKE_CUDA_HOST_COMPILER and CUDAHOSTCXX accordingly, falling back gracefully with a warning if none is found.
Requires gcc15 on Arch: sudo pacman -S gcc15