# - Find libogg
# Find the native ogg headers
#
#  OGG_INCLUDE_DIR  - where to find ogg.h, etc.
#  OGG_LIBRARIES    - ogg library
#  OGG_DEFINES      - ogg defines
#  OGG_FOUND        - True if ogg found.

IF(OGG_FOUND)
    # Already in cache, be silent
    SET(OGG_FIND_QUIETLY TRUE)
ENDIF()

#INCLUDE(${CMAKE_CURRENT_LIST_DIR}/DefinesOGG.txt)

IF(BUILD_OGG OR ACGL_GLOBAL_EXTERN_DIR_FOUND_FIRST_TIME OR BUILD_TYPE_CHANGED)
    UNSET(OGG_INCLUDE_DIR CACHE)
    UNSET(OGG_LIBRARIES CACHE)
ENDIF()

IF(BUILD_OGG)
    SET(OGG_INCLUDE_DIR "${ACGL_LOCAL_EXTERN_DIR}/ogg/include")
    SET(OGG_LIBRARIES ogg${COMPILE_POSTFIX})
ELSE()
    # Look for the header file.
    IF(ACGL_GLOBAL_EXTERN_DIR)
        FIND_PATH(OGG_INCLUDE_DIR NAMES ogg/ogg.h PATHS "${ACGL_GLOBAL_EXTERN_DIR}/ogg/include" NO_DEFAULT_PATH)
    ENDIF()
    IF(NOT OGG_INCLUDE_DIR)
        FIND_PATH(OGG_INCLUDE_DIR NAMES ogg/ogg.h)
    ENDIF()

    # Look for the library file.
    IF(ACGL_GLOBAL_EXTERN_DIR)
        FIND_LIBRARY(OGG_LIBRARIES NAMES ogg${COMPILE_POSTFIX} PATHS "${ACGL_GLOBAL_EXTERN_DIR}/ogg/lib" NO_DEFAULT_PATH)
    ENDIF()
    IF(NOT OGG_LIBRARIES)
        FIND_LIBRARY(OGG_LIBRARIES NAMES ogg)
    ENDIF()
ENDIF()

# Copy the results to the output variables.
IF(OGG_INCLUDE_DIR AND OGG_LIBRARIES)
    SET(OGG_FOUND TRUE CACHE INTERNAL "")
ELSE()
    SET(OGG_FOUND FALSE CACHE INTERNAL "")
ENDIF()

# Report the results.
IF(NOT OGG_FOUND)
    SET(OGG_MESSAGE "ogg was not found. Make sure OGG_INCLUDE_DIR AND OGG_LIBRARIES are set correctly.")
    IF(OGG_FIND_REQUIRED)
        MESSAGE(FATAL_ERROR "${OGG_MESSAGE}")
    ELSEIF(NOT OGG_FIND_QUIETLY)
        MESSAGE(STATUS "${OGG_MESSAGE}")
    ENDIF()
ELSEIF(NOT OGG_FIND_QUIETLY)
    MESSAGE(STATUS "Looking for ogg - found")
ENDIF()

MESSAGE(STATUS "OGG_INCLUDE_DIR:${OGG_INCLUDE_DIR}")
MESSAGE(STATUS "OGG_LIBRARIES:${OGG_LIBRARIES}")