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# - Try to find GIF
# Once done this will define
#
# GIF_FOUND - system has GIF
# GIF_INCLUDE_DIR - the GIF include directory
# GIF_LIBRARIES - Libraries needed to use GIF
# GIF_DEFINITIONS - Compiler switches required for using GIF
# Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
# See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
IF (GIF_INCLUDE_DIR AND GIF_LIBRARIES)
# Already in cache, be silent
SET(GIF_FIND_QUIETLY TRUE)
ENDIF (GIF_INCLUDE_DIR AND GIF_LIBRARIES)
FIND_PATH(GIF_INCLUDE_DIR gif_lib.h)
SET(POTENTIAL_GIF_LIBS gif libgif ungif libungif giflib)
FIND_LIBRARY(GIF_LIBRARIES NAMES ${POTENTIAL_GIF_LIBS})
IF (GIF_INCLUDE_DIR AND GIF_LIBRARIES)
SET(CMAKE_REQUIRED_INCLUDES "${GIF_INCLUDE_DIR}" "${CMAKE_REQUIRED_INCLUDES}")
CHECK_STRUCT_MEMBER(GifFileType UserData gif_lib.h GIF_FOUND)
ENDIF (GIF_INCLUDE_DIR AND GIF_LIBRARIES)
IF (GIF_FOUND)
IF (NOT GIF_FIND_QUIETLY)
MESSAGE(STATUS "Found GIF: ${GIF_LIBRARIES}")
ENDIF (NOT GIF_FIND_QUIETLY)
ELSE (GIF_FOUND)
IF (GIF_FIND_REQUIRED)
MESSAGE(STATUS "Looked for GIF libraries named ${POTENTIAL_GIF_LIBS}.")
MESSAGE(STATUS "Found no acceptable GIF library. This is fatal.")
MESSAGE(FATAL_ERROR "Could NOT find GIF")
ENDIF (GIF_FIND_REQUIRED)
ENDIF (GIF_FOUND)
MARK_AS_ADVANCED(GIF_INCLUDE_DIR GIF_LIBRARIES)
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