ClickHouse/libs/libcommon/cmake/find_jemalloc.cmake

option (ENABLE_JEMALLOC "Set to TRUE to use jemalloc" ${OS_LINUX})
if (OS_LINUX)
    option (USE_INTERNAL_JEMALLOC_LIBRARY "Set to FALSE to use system jemalloc library instead of bundled" ${NOT_UNBUNDLED})
elseif ()
    option (USE_INTERNAL_JEMALLOC_LIBRARY "Set to FALSE to use system jemalloc library instead of bundled" OFF)
endif()

if (ENABLE_JEMALLOC)
    if (NOT USE_INTERNAL_JEMALLOC_LIBRARY)
        find_package (JeMalloc)
    endif ()

    if (NOT JEMALLOC_LIBRARIES)
        set (JEMALLOC_LIBRARIES "jemalloc")
        set (USE_INTERNAL_JEMALLOC_LIBRARY 1)
    endif ()

    if (JEMALLOC_LIBRARIES)
        set (USE_JEMALLOC 1)
    else ()
        message (FATAL_ERROR "ENABLE_JEMALLOC is set to true, but library was not found")
    endif ()

    message (STATUS "Using jemalloc=${USE_JEMALLOC}: ${JEMALLOC_LIBRARIES}")
endif ()