ClickHouse/libs/libcommon/cmake/find_cctz.cmake

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CMake
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option (USE_INTERNAL_CCTZ_LIBRARY "Set to FALSE to use system cctz library instead of bundled" ${NOT_UNBUNDLED})
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if(NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/cctz/include/cctz/time_zone.h")
if(USE_INTERNAL_CCTZ_LIBRARY)
message(WARNING "submodule contrib/cctz is missing. to fix try run: \n git submodule update --init --recursive")
endif()
set(USE_INTERNAL_CCTZ_LIBRARY 0)
set(MISSING_INTERNAL_CCTZ_LIBRARY 1)
endif()
if (NOT USE_INTERNAL_CCTZ_LIBRARY)
find_library (CCTZ_LIBRARY cctz)
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find_path (CCTZ_INCLUDE_DIR NAMES cctz/civil_time.h civil_time.h PATHS ${CCTZ_INCLUDE_PATHS})
endif ()
if (CCTZ_LIBRARY AND CCTZ_INCLUDE_DIR)
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elseif (NOT MISSING_INTERNAL_CCTZ_LIBRARY)
set (USE_INTERNAL_CCTZ_LIBRARY 1)
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set (CCTZ_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/cctz/include")
set (CCTZ_LIBRARY cctz)
endif ()
message (STATUS "Using cctz: ${CCTZ_INCLUDE_DIR} : ${CCTZ_LIBRARY}")