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Summary: In D76527, we stopped exporting symbols from clang, opt and llc unless the `LLVM_ENABLE_PLUGINS` cmake variable is true (which causes clang's own plugin collection to be built). But another reasonable build configuration is to ask clang to export its symbols for out-of-tree plugins to use, without building the in-tree ones. That is, you might set `LLVM_EXPORT_SYMBOLS_FOR_PLUGINS` without also setting `LLVM_ENABLE_PLUGINS` (at least if you're using MSVC, where you need to ask explicitly for the symbols to be exported). In that situation, the symbols should still be exported, but after D76527, they weren't being. Reviewers: efriedma, john.brawn Reviewed By: efriedma, john.brawn Subscribers: mgorny, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D76760
See docs/CMake.html for instructions on how to build LLVM with CMake.