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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
#
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
/usr/include
/usr/local/include
)
set(POTENTIAL_GIF_LIBS gif libgif ungif libungif giflib)
FIND_LIBRARY(GIF_LIBRARIES NAMES ${POTENTIAL_GIF_LIBS}
PATHS
/usr/lib
/usr/local/lib
)
if (GIF_INCLUDE_DIR AND GIF_LIBRARIES)
set(CMAKE_REQUIRED_INCLUDES "${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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