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Fix windows build for pytorch 2.9 #243

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Fix windows build for pytorch 2.9 #243

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30 changes: 30 additions & 0 deletions setup.py
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,36 @@
"-diag-suppress=174", # suppress the specific warning
]

# Platform-specific compiler flags.
if os.name == 'nt': # Windows
CXX_FLAGS = ["/Zi", "/O2", "/openmp", "/std:c++17", "/DENABLE_BF16", "/MD"]
NVCC_FLAGS = [
"-O3",
"-std=c++17",
"--use-local-env", # specific to windows NVCC builds
"-U__CUDA_NO_HALF_OPERATORS__",
"-U__CUDA_NO_HALF_CONVERSIONS__",
"--use_fast_math",
"--threads=8",
"-Xptxas=-v",
"-diag-suppress=174",
# NVCC forwards flags to MSVC differently (-Xcompiler is needed).
"-Xcompiler", "/openmp",
"-Xcompiler", "/std:c++17",
]
else: # Linux, macOS, etc.
CXX_FLAGS = ["-g", "-O3", "-fopenmp", "-lgomp", "-std=c++17", "-DENABLE_BF16"]
NVCC_FLAGS = [
"-O3",
"-std=c++17",
"-U__CUDA_NO_HALF_OPERATORS__",
"-U__CUDA_NO_HALF_CONVERSIONS__",
"--use_fast_math",
"--threads=8",
"-Xptxas=-v",
"-diag-suppress=174",
]

ABI = 1 if torch._C._GLIBCXX_USE_CXX11_ABI else 0
CXX_FLAGS += [f"-D_GLIBCXX_USE_CXX11_ABI={ABI}"]
NVCC_FLAGS += [f"-D_GLIBCXX_USE_CXX11_ABI={ABI}"]
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