tweaking compiler flags

Author: stoo

.github/workflows/build-windows-wheel-test.yml

@@ -367,14 +367,17 @@ jobs:
                 exit 1
             }
         }
-
         # Set environment variables for subsequent steps
-        echo "INCLUDE=$include_paths;$env:INCLUDE" >> $env:GITHUB_ENV
+        echo "INCLUDE=$include_paths;C:\sparsehash\src;$env:INCLUDE" >> $env:GITHUB_ENV
         echo "LIB=$lib_paths;$env:LIB" >> $env:GITHUB_ENV
         echo "PATH=$cuda_root\bin;$env:PATH" >> $env:GITHUB_ENV
         echo "CUDA_PATH=$cuda_root" >> $env:GITHUB_ENV
         echo "CUDA_HOME=$cuda_root" >> $env:GITHUB_ENV
         echo "CUDA_TOOLKIT_ROOT_DIR=$cuda_root" >> $env:GITHUB_ENV
+        
+        # Set additional CUDA compile flags
+        echo "NVCC_FLAGS=--use-local-env -Xcompiler /MD -Xcompiler /O2" >> $env:GITHUB_ENV
+        echo "CUDA_NVCC_FLAGS=--use-local-env -Xcompiler /MD -Xcompiler /O2" >> $env:GITHUB_ENV
 
         # Verify CUDA setup
         Write-Host "CUDA Environment Setup:"
@@ -402,19 +405,21 @@ jobs:
         # Verify NVCC
         Write-Host "NVCC version:"
         nvcc --version
-
     # Set build environment (Windows)
     - name: Set build environment (Windows)
       if: runner.os == 'Windows'
       shell: pwsh
       run: |
         # Set environment variables for optimized Windows build
-        echo "CL=/O1 /MP4" >> $env:GITHUB_ENV
+        echo "CL=/O2 /MP4 /DWIN32 /D_WINDOWS" >> $env:GITHUB_ENV
         echo "DISTUTILS_USE_SDK=1" >> $env:GITHUB_ENV
         echo "MSSdk=1" >> $env:GITHUB_ENV
         echo "FORCE_CUDA=1" >> $env:GITHUB_ENV
         echo "TORCH_CUDA_ARCH_LIST=7.5;8.0;8.6;8.9" >> $env:GITHUB_ENV
         echo "MAX_JOBS=4" >> $env:GITHUB_ENV
+        # Add MSVC specific defines
+        echo "_CRT_SECURE_NO_WARNINGS=1" >> $env:GITHUB_ENV
+        echo "_SILENCE_TR1_NAMESPACE_DEPRECATION_WARNING=1" >> $env:GITHUB_ENV
 
     - name: Set build environment (Linux)
       if: runner.os == 'Linux'