Source/cmake/FindLibPSL.cmake

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#[=======================================================================[.rst:
FindLibPSL
--------------

Find LibPSL headers and libraries.

Imported Targets
^^^^^^^^^^^^^^^^

``LibPSL::LibPSL``
  The LibPSL library, if found.

Result Variables
^^^^^^^^^^^^^^^^

This will define the following variables in your project:

``LibPSL_FOUND``
  true if (the requested version of) LibPSL is available.
``LibPSL_VERSION``
  the version of LibPSL.
``LibPSL_LIBRARIES``
  the libraries to link against to use LibPSL.
``LibPSL_INCLUDE_DIRS``
  where to find the LibPSL headers.
``LibPSL_COMPILE_OPTIONS``
  this should be passed to target_compile_options(), if the
  target is not used for linking

#]=======================================================================]

find_package(PkgConfig QUIET)
pkg_check_modules(PC_LIBPSL QUIET libpsl)
set(LibPSL_COMPILE_OPTIONS ${PC_LIBPSL_CFLAGS_OTHER})
set(LibPSL_VERSION ${PC_LIBPSL_VERSION})

find_path(LibPSL_INCLUDE_DIR
    NAMES libpsl.h
    HINTS ${PC_LIBPSL_INCLUDEDIR} ${PC_LIBPSL_INCLUDE_DIR}
    PATH_SUFFIXES libpsl
)

find_library(LibPSL_LIBRARY
    NAMES ${LibPSL_NAMES} psl
    HINTS ${PC_LIBPSL_LIBDIR} ${PC_LIBPSL_LIBRARY_DIRS}
)

if (LibPSL_INCLUDE_DIR AND NOT LibPSL_VERSION)
    if (EXISTS "${LibPSL_INCLUDE_DIR}/libpsl.h")
        file(READ "${LibPSL_INCLUDE_DIR}/libpsl.h" LibPSL_VERSION_CONTENT)

        string(REGEX MATCH "#define +PSL_VERSION_MAJOR +([0-9]+)" _dummy "${LibPSL_VERSION_CONTENT}")
        set(LibPSL_VERSION_MAJOR "${CMAKE_MATCH_1}")

        string(REGEX MATCH "#define +PSL_VERSION_MINOR +([0-9]+)" _dummy "${LibPSL_VERSION_CONTENT}")
        set(LibPSL_VERSION_MINOR "${CMAKE_MATCH_1}")

        string(REGEX MATCH "#define +PSL_VERSION_PATCH +([0-9]+)" _dummy "${LibPSL_VERSION_CONTENT}")
        set(LibPSL_VERSION_PATCH "${CMAKE_MATCH_1}")

        set(LibPSL_VERSION "${LibPSL_VERSION_MAJOR}.${LibPSL_VERSION_MINOR}.${LibPSL_VERSION_PATCH}")
    endif ()
endif ()

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

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

mark_as_advanced(LibPSL_INCLUDE_DIR LibPSL_LIBRARY)

if (LibPSL_FOUND)
    set(LibPSL_LIBRARIES ${LibPSL_LIBRARY})
    set(LibPSL_INCLUDE_DIRS ${LibPSL_INCLUDE_DIR})
endif ()