Deprecate and set a date for removing NO_* and WITH_* (user) build options (#22474)
Summary:
Currently specifying different build options in respect to the "USE_"
series is in quite a disarray. There are a lot of build options that
accept three variants: USE_OPTION, WITH_OPTION, and NO_OPTION. Some
build options only accept USE_ and NO_ variant. Some accept only USE_.
This inconsistency is quite confusing and hard to maintain.
To resolve this inconsistency, we can either let all these build options
support all three variants, or we only support the USE_ variant.
This commit makes a step to the latter choice, i.e., deprecates and sets
a date for removing the NO_ and WITH_ variants and keeps only the
USE_ variant. This is likely better than the former solution because:
- NO_ and WITH_ variants are not documented.
- CMakeLists.txt only has the USE_ variants for relevant build options
defined. It would be a surprise that when user pass these variables to
CMake during rebuild and find them ineffective.
- Multiple variants are difficult to maintain.
- The behavior is confusing if more than one variant is passed. For
example, what to be expected if one sets "NO_CUDA=1 USE_CUDA=1"?
The downside is that this will break backward compatibility for existing
build scripts in the future (if they used the undocumented build
options).
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22474
Differential Revision: D16149396
Pulled By: ezyang
fbshipit-source-id: 7145b88ad195db2051772b9665dd708dfcf50b7d
