functorch.so is installed back into the source directory

[yurivict]

🐛 Describe the bug

It installs this file:

/usr/ports/misc/py-pytorch/work/pytorch-v1.13.1/functorch/functorch.so

where /usr/ports/misc/py-pytorch/work/pytorch-v1.13.1 is a source directory it was built from.

cmake args:
-DPSIMD_SOURCE_DIR=/usr/ports/misc/py-pytorch/work/pytorch-v1.13.1/third_party/psimd -DFREEBSD_PYTHON_VER=3.9 -DPYTHON_EXECUTABLE:STRING=/usr/local/bin/python3.9 -DBUILD_PYTHON:BOOL=true -DCMAKE_C_COMPILER:STRING="cc" -DCMAKE_CXX_COMPILER:STRING="c++" -DCMAKE_C_FLAGS:STRING="-O2 -pipe -fstack-protector-strong -fno-strict-aliasing " -DCMAKE_C_FLAGS_DEBUG:STRING="-O2 -pipe -fstack-protector-strong -fno-strict-aliasing " -DCMAKE_C_FLAGS_RELEASE:STRING="-O2 -pipe -fstack-protector-strong -fno-strict-aliasing -DNDEBUG" -DCMAKE_CXX_FLAGS:STRING="-O2 -pipe -fstack-protector-strong -fno-strict-aliasing " -DCMAKE_CXX_FLAGS_DEBUG:STRING="-O2 -pipe -fstack-protector-strong -fno-strict-aliasing " -DCMAKE_CXX_FLAGS_RELEASE:STRING="-O2 -pipe -fstack-protector-strong -fno-strict-aliasing -DNDEBUG" -DCMAKE_EXE_LINKER_FLAGS:STRING=" -lexecinfo -fstack-protector-strong " -DCMAKE_MODULE_LINKER_FLAGS:STRING=" -lexecinfo -fstack-protector-strong " -DCMAKE_SHARED_LINKER_FLAGS:STRING=" -lexecinfo -fstack-protector-strong " -DCMAKE_INSTALL_PREFIX:PATH="/usr/local" -DCMAKE_BUILD_TYPE:STRING="Release" -DTHREADS_HAVE_PTHREAD_ARG:BOOL=YES -DCMAKE_INSTALL_RPATH_USE_LINK_PATH=YES -DCMAKE_VERBOSE_MAKEFILE:BOOL=ON -DFETCHCONTENT_FULLY_DISCONNECTED:BOOL=ON -DBUILD_CUSTOM_PROTOBUF:BOOL=OFF -DUSE_CUDA:BOOL=OFF -DUSE_ROCM:BOOL=OFF -DUSE_NNPACK:BOOL=OFF -DUSE_QNNPACK:BOOL=OFF -DUSE_PYTORCH_QNNPACK:BOOL=OFF -DUSE_FBGEMM:BOOL=OFF -GNinja -DPython_ADDITIONAL_VERSIONS=3.9 -DBOOST_PYTHON_SUFFIX:STRING=39

Version: 1.13.1
Python-3.9
FreeBSD 13.1

Versions

$ python3.9 ./work/pytorch-v1.13.1/torch/utils/collect_env.py
Collecting environment information...
PyTorch version: N/A
Is debug build: N/A
CUDA used to build PyTorch: N/A
ROCM used to build PyTorch: N/A

OS: freebsd13
GCC version: Could not collect
Clang version: 14.0.5 (https://github.com/llvm/llvm-project.git llvmorg-14.0.5-0-gc12386ae247c)
CMake version: version 3.24.3
Libc version: N/A

Python version: 3.9.16 (main, Dec 18 2022, 01:15:32)  [Clang 13.0.0 (git@github.com:llvm/llvm-project.git llvmorg-13.0.0-0-gd7b669b3a (64-bit runtime)
Python platform: FreeBSD-13.1-STABLE-amd64-64bit-ELF
Is CUDA available: N/A
CUDA runtime version: Could not collect
CUDA_MODULE_LOADING set to: N/A
GPU models and configuration: GPU 0: NVIDIA GeForce RTX 2060
Nvidia driver version: 510.60.02
cuDNN version: Could not collect
HIP runtime version: N/A
MIOpen runtime version: N/A
Is XNNPACK available: N/A

Versions of relevant libraries:
[pip3] mypy-extensions==0.4.3
[pip3] mypy-protobuf==3.3.0
[pip3] numpy==1.23.4
[conda] Could not collect

cc @malfet @seemethere @zou3519 @Chillee @samdow @soumith