[PATCH] D81778: [llvmbuild] Add optional_libraries, i.e. a dependency iff the target is enabled

[Daniel Sanders via Phabricator via llvm-commits]

dsanders created this revision.
dsanders added reviewers: bogner, ddunbar.
Herald added a project: LLVM.
dsanders added a parent revision: D81777: [llvmbuild] --enable-optional-components should not be a substring match.
dsanders added a parent revision: D81773: [llvmbuild] Allow OptionalLibrary's to be enabled by default and disabled.
dsanders removed a parent revision: D81773: [llvmbuild] Allow OptionalLibrary's to be enabled by default and disabled.

Optional dependencies are promoted to required dependencies if the specified
library is enabled via --enable-optional-components or enabled_component = 1,
or dropped if the specified library is disabled. Of course, another mechanism
(such as preprocessor macros) needs to be used so that there are no unresolved
symbols.

It's a warning to specify a library that's not optional in optional_libraries.
Such a dependency will be treated as if it were provided via required_libraries.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D81778

Files:
  llvm/test/LLVMBuild/optional-library/Input/LLVMBuild.txt
  llvm/test/LLVMBuild/optional-library/Input/lib/IR/Function.cpp
  llvm/test/LLVMBuild/optional-library/Input/lib/LLVMBuild.txt
  llvm/test/LLVMBuild/optional-library/optional-library.test
  llvm/utils/llvm-build/llvmbuild/componentinfo.py
  llvm/utils/llvm-build/llvmbuild/main.py

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