ore-/gist:d3e52c2bf83f6dc74dce906eda20debe

## gistfile1.txt
Original intention was to install dlib dep for https://github.com/cubiq/ComfyUI_FaceAnalysis. Even though both cmake and MSVC 14 with VS 2022 build tool (17.9.7) were installed, when doign pip install dlib under ComfyUI_FaceAnalysis venv, it complained that cmake was not available.
So tried to build it from latest dlib repo. Took such a long time debugging the process:
  - initially build failed with ValueError: path 'dlib/CMakeLists.txt/' cannot end with '/'. Found https://github.com/davisking/dlib/issues/2668 which led to https://github.com/davisking/dlib/issues/2480#issuecomment-1003647257. Apparently the build needs to be in the same drive as where Python is located (I had it in C:), even though the build was initiated from a venv (in D:).
  - then the build couldn't locate cudnn, as cmake needs these cmake specific paths to point to the cudnn directories - https://stackoverflow.com/questions/78276120/dlib-fails-to-install-with-cuda-says-i-am-missing-cudnn
  - build still failed as cuda wasn't compatible with VS 2022 v17.10 (https://stackoverflow.com/questions/78515942/cuda-compatibility-with-visual-studio-2022-version-17-10). downgraded the build tools to v17.9.7 by following steps and using specific vs installers for the build tool: https://wiki.python.org/moin/WindowsCompilers, https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-history#updating-your-installation-to-a-specific-release
  - build succeeded but import failed. found https://github.com/davisking/dlib/issues/2097. dlib/__init__.py had some really odd choices of constructing the cuda/cudnn dll paths (hardcoded to do ../../bin). replaced them with the direct paths on my machine.
  - even though import dlib then worked (which meant it found the expected dlls), when invoking dlib, still failed with "Could not locate cudnn_ops_infer64_8.dll. Please make sure it is in your library path!"
  - (also tried these precompiled wheels, when installing, pip complained it was invalid, even though I picked the one for my python version - https://github.com/z-mahmud22/Dlib_Windows_Python3.x)

Ended up building dlib without cuda. wasted a whole afternoon.

(Win10, cuda 12.1, cudnn 9.1.1)
	Original intention was to install dlib dep for https://github.com/cubiq/ComfyUI_FaceAnalysis. Even though both cmake and MSVC 14 with VS 2022 build tool (17.9.7) were installed, when doign pip install dlib under ComfyUI_FaceAnalysis venv, it complained that cmake was not available.
	So tried to build it from latest dlib repo. Took such a long time debugging the process:
	- initially build failed with ValueError: path 'dlib/CMakeLists.txt/' cannot end with '/'. Found https://github.com/davisking/dlib/issues/2668 which led to https://github.com/davisking/dlib/issues/2480#issuecomment-1003647257. Apparently the build needs to be in the same drive as where Python is located (I had it in C:), even though the build was initiated from a venv (in D:).
	- then the build couldn't locate cudnn, as cmake needs these cmake specific paths to point to the cudnn directories - https://stackoverflow.com/questions/78276120/dlib-fails-to-install-with-cuda-says-i-am-missing-cudnn
	- build still failed as cuda wasn't compatible with VS 2022 v17.10 (https://stackoverflow.com/questions/78515942/cuda-compatibility-with-visual-studio-2022-version-17-10). downgraded the build tools to v17.9.7 by following steps and using specific vs installers for the build tool: https://wiki.python.org/moin/WindowsCompilers, https://learn.microsoft.com/en-us/visualstudio/releases/2022/release-history#updating-your-installation-to-a-specific-release
	- build succeeded but import failed. found https://github.com/davisking/dlib/issues/2097. dlib/__init__.py had some really odd choices of constructing the cuda/cudnn dll paths (hardcoded to do ../../bin). replaced them with the direct paths on my machine.
	- even though import dlib then worked (which meant it found the expected dlls), when invoking dlib, still failed with "Could not locate cudnn_ops_infer64_8.dll. Please make sure it is in your library path!"
	- (also tried these precompiled wheels, when installing, pip complained it was invalid, even though I picked the one for my python version - https://github.com/z-mahmud22/Dlib_Windows_Python3.x)

	Ended up building dlib without cuda. wasted a whole afternoon.

	(Win10, cuda 12.1, cudnn 9.1.1)