Set C++17 for latest pytorch versions. Add flags for CUDA 12 and 11.8 (#641)

* Set C++17 for latest pytorch versions. Add flags for CUDA 12 and 11.8

* Update setup.py

* remove import subprocess

* more robust way to compare version

---------
Co-authored-by: Jinze Xue <jinzexue@ufl.edu>

setup.py

 import os
-import subprocess
+from packaging import version
 from setuptools import setup, find_packages
 from distutils import log
 import sys
@@ -24,32 +24,6 @@ with open("README.md", "r") as fh:
     long_description = fh.read()
 
 
-def maybe_download_cub():
-    import torch
-    dirs = torch.utils.cpp_extension.include_paths(cuda=True)
-    for d in dirs:
-        cubdir = os.path.join(d, 'cub')
-        log.info(f'Searching for cub at {cubdir}...')
-        if os.path.isdir(cubdir):
-            log.info(f'Found cub in {cubdir}')
-            return []
-    # if no cub, download it to include dir from github
-    if not os.path.isdir('./include/cub'):
-        if not os.path.exists('./include'):
-            os.makedirs('include')
-        commands = """
-        echo "Downloading CUB library";
-        wget -q https://github.com/NVIDIA/cub/archive/refs/tags/1.11.0.zip;
-        unzip -q 1.11.0.zip -d include;
-        mv include/cub-1.11.0/cub include;
-        echo "Removing unnecessary files";
-        rm 1.11.0.zip;
-        rm -rf include/cub-1.11.0;
-        """
-        subprocess.run(commands, shell=True, check=True, universal_newlines=True)
-    return [os.path.abspath("./include")]
-
-
 def cuda_extension(build_all=False):
     import torch
     from torch.utils.cpp_extension import CUDAExtension
@@ -87,15 +61,24 @@ def cuda_extension(build_all=False):
             nvcc_args.append("-gencode=arch=compute_80,code=sm_80")
         if cuda_version >= 11.1:
             nvcc_args.append("-gencode=arch=compute_86,code=sm_86")
+        if cuda_version >= 11.8:
+            nvcc_args.append("-gencode=arch=compute_89,code=sm_89")
+        if cuda_version >= 12.0:
+            nvcc_args.append("-gencode=arch=compute_90,code=sm_90")
+
     print("nvcc_args: ", nvcc_args)
     print('-' * 75)
-    include_dirs = [*maybe_download_cub(), os.path.abspath("torchani/cuaev/")]
+    include_dirs = [os.path.abspath("torchani/cuaev/")]
+    # Update C++ standard based on PyTorch version
+    pytorch_version = version.parse(torch.__version__)
+    cxx_args = ['-std=c++17'] if pytorch_version >= version.parse("2.1.0") else ['-std=c++14']
+
     return CUDAExtension(
         name='torchani.cuaev',
         pkg='torchani.cuaev',
         sources=["torchani/cuaev/cuaev.cpp", "torchani/cuaev/aev.cu"],
         include_dirs=include_dirs,
-        extra_compile_args={'cxx': ['-std=c++14'], 'nvcc': nvcc_args})
+        extra_compile_args={'cxx': cxx_args, 'nvcc': nvcc_args})
 
 
 def cuaev_kwargs():