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[cmake] [libunwind] Fix find_path() problems when cross compiling
When CMAKE_SYSROOT or CMAKE_FIND_ROOT_PATH is set, cmake recommends setting CMAKE_FIND_ROOT_PATH_MODE_INCLUDE=ONLY globally which means find_path() always prepends CMAKE_SYSROOT or CMAKE_FIND_ROOT_PATH to all paths used in the search. However, this find_path() invocation is looking for a path in the libcxx project on the host system, not the target system, which can be done by passing NO_CMAKE_FIND_ROOT_PATH. Differential Revision: https://reviews.llvm.org/D41621 llvm-svn: 323141
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@ -329,7 +329,8 @@ find_path(
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PATHS ${LLVM_MAIN_SRC_DIR}/projects/libcxx/include
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${LLVM_MAIN_SRC_DIR}/runtimes/libcxx/include
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NO_DEFAULT_PATH
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)
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NO_CMAKE_FIND_ROOT_PATH
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)
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if ((NOT LIBUNWIND_STANDALONE_BUILD OR HAVE_LIBCXX) AND
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IS_DIRECTORY "${LIBUNWIND_LIBCXX_INCLUDES_INTERNAL}")
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set(LIBUNWIND_CXX_INCLUDE_PATHS_DEFAULT "${LIBUNWIND_LIBCXX_INCLUDES_INTERNAL}")
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