ceph/cmake/modules/Findc-ares.cmake

find_package(PkgConfig QUIET)

pkg_search_module(PC_cares
  libcares)

find_path(c-ares_INCLUDE_DIR
  NAMES ares_dns.h
  PATHS ${PC_cares_INCLUDE_DIRS})

find_library(c-ares_LIBRARY
  NAMES cares
  PATHS ${PC_cares_LIBRARY_DIRS})

set(c-ares_VERSION ${PC_cares_VERSION})

include(FindPackageHandleStandardArgs)

find_package_handle_standard_args(c-ares
  REQUIRED_VARS
    c-ares_INCLUDE_DIR
    c-ares_LIBRARY
  VERSION_VAR c-ares_VERSION)

if(c-ares_FOUND AND NOT (TARGET c-ares::cares))
  add_library(c-ares::cares UNKNOWN IMPORTED)
  set_target_properties(c-ares::cares PROPERTIES
    INTERFACE_INCLUDE_DIRECTORIES "${c-ares_INCLUDE_DIR}"
    IMPORTED_LINK_INTERFACE_LANGUAGES "C"
    IMPORTED_LOCATION "${c-ares_LIBRARY}")
  # to be compatible with old Seastar
  add_library(c-ares::c-ares ALIAS c-ares::cares)
endif()