masahi commented on code in PR #15995:
URL: https://github.com/apache/tvm/pull/15995#discussion_r1374967973
##########
cmake/modules/CUDA.cmake:
##########
@@ -64,6 +64,7 @@ if(USE_CUDA)
message(STATUS "Build with Thrust support")
cmake_minimum_required(VERSION 3.13) # to compile CUDA code
enable_language(CUDA)
+ set(CMAKE_CUDA_ARCHITECTURES "80;75")
Review Comment:
The is due to an odd behavior of cmake that I don't understand. If I remove
this and set `USE_THRUST`, I get
```
CMake Error in CMakeLists.txt:
CUDA_ARCHITECTURES is empty for target "tvm_runtime_objs".
```
. Previously I didn't encounter this problem when I was using `USE_THRUST`
(a couple of years ago).
This doesn't apply to `vllm.cmake` for some reason. But there, if I don't
have `set(CMAKE_CUDA_ARCHITECTURES "80;75")`, I get
```
error : Feature 'f16 arithemetic and compare instructions' requires
.target sm_53 or higher
```
during build.
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