FindOgg.cmake

# - Find ogg
# Find the native ogg includes and libraries
#
#  OGG_INCLUDE_DIRS - where to find ogg.h, etc.
#  OGG_LIBRARIES    - List of libraries when using ogg.
#  OGG_FOUND        - True if ogg found.

find_package(Ogg CONFIG QUIET)

if (NOT TARGET Ogg::ogg)
  if (OGG_INCLUDE_DIR)
    # Already in cache, be silent
    set(OGG_FIND_QUIETLY TRUE)
  endif()

  find_package(PkgConfig QUIET)
  pkg_check_modules(PC_OGG QUIET ogg)

  set(OGG_VERSION ${PC_OGG_VERSION})

  find_path(OGG_INCLUDE_DIR ogg/ogg.h
    HINTS
      ${PC_OGG_INCLUDEDIR}
      ${PC_OGG_INCLUDE_DIRS}
      ${OGG_ROOT}
    )
  # MSVC built ogg may be named ogg_static.
  # The provided project files name the library with the lib prefix.
  find_library(OGG_LIBRARY
    NAMES
      ogg
      ogg_static
      libogg
      libogg_static
    HINTS
      ${PC_OGG_LIBDIR}
      ${PC_OGG_LIBRARY_DIRS}
      ${OGG_ROOT}
    )
  # Handle the QUIETLY and REQUIRED arguments and set OGG_FOUND
  # to TRUE if all listed variables are TRUE.
  include(FindPackageHandleStandardArgs)
  find_package_handle_standard_args(Ogg
    REQUIRED_VARS
      OGG_LIBRARY
      OGG_INCLUDE_DIR
    VERSION_VAR
      OGG_VERSION
    )

  if (OGG_FOUND)
    set(OGG_LIBRARIES ${OGG_LIBRARY})
    set(OGG_INCLUDE_DIRS ${OGG_INCLUDE_DIR})

    if(NOT TARGET Ogg::ogg)
      add_library(Ogg::ogg UNKNOWN IMPORTED)
      set_target_properties(Ogg::ogg PROPERTIES
        INTERFACE_INCLUDE_DIRECTORIES "${OGG_INCLUDE_DIRS}"
        IMPORTED_LOCATION "${OGG_LIBRARIES}"
        )
    endif()
  endif()

  mark_as_advanced(OGG_INCLUDE_DIR OGG_LIBRARY)
endif()