try to fix window cublas CI failure

Refs: https://github.com/ggml-org/whisper.cpp/actions/runs/25631391231/job/75237266964?pr=3803

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index be3f78a3f5bb3ebdb92fdc07422d9b02c515b2ce..df390a9179c324419487f2606b5e6e8af412923f 100644 (file)
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -944,7 +944,7 @@ jobs:
           cmake --version
           where cmake
           if "${{ matrix.cuda-toolkit }}" == "11.8.0" (
-            set CUDA_FLAGS=-allow-unsupported-compiler -D_ALLOW_COMPILER_AND_STL_VERSION_MISMATCH -D_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR
+            set CUDA_FLAGS=-allow-unsupported-compiler -D_ALLOW_COMPILER_AND_STL_VERSION_MISMATCH -D_DISABLE_CONSTEXPR_MUTEX_CONSTRUCTOR -D__CUDA_NO_HALF_CONVERSIONS__
           ) else (
             set CUDA_FLAGS=
           )