CMake: Protects against double find_package
Boost iostream uses `find_package` in quiet mode and then again uses `find_package` with required. This second call triggers a `add_library cannot create imported target "LibLZMA::LibLZMA" because another target with the same name already exists.` This can simply be fixed by skipping the alias part on secondary `find_package` runs.
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@ -889,13 +889,15 @@ write_basic_package_version_file(
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set(LZMA_CONFIG_CONTENTS
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set(LZMA_CONFIG_CONTENTS
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"include(\"\${CMAKE_CURRENT_LIST_DIR}/liblzma-targets.cmake\")
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"include(\"\${CMAKE_CURRENT_LIST_DIR}/liblzma-targets.cmake\")
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# Be compatible with the spelling used by the FindLibLZMA module. This
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if(NOT TARGET LibLZMA::LibLZMA)
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# doesn't use ALIAS because it would make CMake resolve LibLZMA::LibLZMA
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# Be compatible with the spelling used by the FindLibLZMA module. This
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# to liblzma::liblzma instead of keeping the original spelling. Keeping
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# doesn't use ALIAS because it would make CMake resolve LibLZMA::LibLZMA
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# the original spelling is important for good FindLibLZMA compatibility.
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# to liblzma::liblzma instead of keeping the original spelling. Keeping
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add_library(LibLZMA::LibLZMA INTERFACE IMPORTED)
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# the original spelling is important for good FindLibLZMA compatibility.
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set_target_properties(LibLZMA::LibLZMA PROPERTIES
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add_library(LibLZMA::LibLZMA INTERFACE IMPORTED)
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set_target_properties(LibLZMA::LibLZMA PROPERTIES
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INTERFACE_LINK_LIBRARIES liblzma::liblzma)
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INTERFACE_LINK_LIBRARIES liblzma::liblzma)
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endif()
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")
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")
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if(ENABLE_THREADS STREQUAL "posix")
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if(ENABLE_THREADS STREQUAL "posix")
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