find_path(LibPSL_INCLUDE_DIR NAMES libpsl.h)
find_library(LibPSL_LIBRARY NAMES psl)

if(LibPSL_INCLUDE_DIR)
  file(STRINGS "${LibPSL_INCLUDE_DIR}/libpsl.h" _LibPSL_VERSION_LINE
    REGEX "^#define PSL_VERSION[ \t]+\"[0-9]+\\.[0-9]+\\.[0-9]+\"")
  string(REGEX MATCH "\"([0-9]+\\.[0-9]+\\.[0-9]+)\""
    _LibPSL_VERSION_MATCH "${_LibPSL_VERSION_LINE}")
  set(LibPSL_VERSION "${CMAKE_MATCH_1}")
endif()

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(LibPSL
  REQUIRED_VARS LibPSL_LIBRARY LibPSL_INCLUDE_DIR
  VERSION_VAR LibPSL_VERSION)

if(LibPSL_FOUND AND NOT TARGET LibPSL::LibPSL)
  add_library(LibPSL::LibPSL UNKNOWN IMPORTED)
  set_target_properties(LibPSL::LibPSL PROPERTIES
    IMPORTED_LOCATION "${LibPSL_LIBRARY}"
    INTERFACE_INCLUDE_DIRECTORIES "${LibPSL_INCLUDE_DIR}")
endif()

mark_as_advanced(LibPSL_INCLUDE_DIR LibPSL_LIBRARY)