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- starting from llvm14 the install prefix breaks via symlinks;
- /usr/lib/llvm14/lib/cmake/llvm/LLVMConfig.cmake goes up 3 directories to find
- /usr/lib/llvm14/include as LLVM_INCLUDE_DIRS, but to even use this cmake folder
- at all it has to be symlinked to /usr/lib/cmake/llvm .. so the directory it
- instead uses is just /usr/include, which is not where the cmake includes are.
- this hardcodes them to the install prefix we pass via cmake, which should
- always be correct, and what cmake tries to autodetect anyway.
- also see: https://reviews.llvm.org/D29969
- this is supposedly fixed now, but for some reason it still isn't
- --- a/llvm/cmake/modules/CMakeLists.txt
- +++ b/llvm/cmake/modules/CMakeLists.txt
- @@ -41,6 +41,8 @@
- #
-
- set(LLVM_CONFIG_CODE "
- +# this is wrong when automatically detected
- +set(LLVM_INSTALL_PREFIX \"${CMAKE_INSTALL_PREFIX}\")
- # LLVM_BUILD_* values available only from LLVM build tree.
- set(LLVM_BUILD_BINARY_DIR \"${LLVM_BINARY_DIR}\")
- set(LLVM_BUILD_LIBRARY_DIR \"${LLVM_LIBRARY_DIR}\")
- @@ -109,8 +111,6 @@
- #
- # Generate LLVMConfig.cmake for the install tree.
- #
- -
- -find_prefix_from_config(LLVM_CONFIG_CODE LLVM_INSTALL_PREFIX "${LLVM_INSTALL_PACKAGE_DIR}")
-
- extend_path(LLVM_CONFIG_MAIN_INCLUDE_DIR "\${LLVM_INSTALL_PREFIX}" "${CMAKE_INSTALL_INCLUDEDIR}")
- # This is the same as the above because the handwritten and generated headers
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