81 lines
2.6 KiB
CMake
81 lines
2.6 KiB
CMake
# This module searches giflib and defines
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# GIF_LIBRARIES - libraries to link to in order to use GIF
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# GIF_FOUND, if false, do not try to link
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# GIF_INCLUDE_DIR, where to find the headers
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# GIF_VERSION, reports either version 4 or 3 (for everything before version 4)
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#
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# The minimum required version of giflib can be specified using the
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# standard syntax, e.g. FIND_PACKAGE(GIF 4)
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#
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# $GIF_DIR is an environment variable that would
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# correspond to the ./configure --prefix=$GIF_DIR
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#=============================================================================
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# Copyright 2007-2009 Kitware, Inc.
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#
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# Distributed under the OSI-approved BSD License (the "License");
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# see accompanying file Copyright.txt for details.
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#
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# This software is distributed WITHOUT ANY WARRANTY; without even the
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# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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# See the License for more information.
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#=============================================================================
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# (To distribute this file outside of CMake, substitute the full
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# License text for the above reference.)
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# Created by Eric Wing.
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# Modifications by Alexander Neundorf
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FIND_PATH(GIF_INCLUDE_DIR gif_lib.h
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HINTS
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$ENV{GIF_DIR}
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PATH_SUFFIXES include
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PATHS
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~/Library/Frameworks
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/usr/freeware
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)
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# the gif library can have many names :-/
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SET(POTENTIAL_GIF_LIBS gif libgif ungif libungif giflib giflib4)
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FIND_LIBRARY(GIF_LIBRARY
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NAMES ${POTENTIAL_GIF_LIBS}
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HINTS
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$ENV{GIF_DIR}
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PATH_SUFFIXES lib64 lib
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PATHS
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~/Library/Frameworks
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/usr/freeware
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)
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# see readme.txt
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SET(GIF_LIBRARIES ${GIF_LIBRARY})
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# Very basic version detection.
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# The GIF_LIB_VERSION string in gif_lib.h seems to be unreliable, since it seems
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# to be always " Version 2.0, " in versions 3.x of giflib.
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# In version 4 the member UserData was added to GifFileType, so we check for this
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# one.
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# http://giflib.sourcearchive.com/documentation/4.1.4/files.html
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IF(GIF_INCLUDE_DIR)
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INCLUDE(CMakePushCheckState)
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INCLUDE(CheckStructHasMember)
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CMAKE_PUSH_CHECK_STATE()
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SET(GIF_VERSION 3)
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SET(CMAKE_REQUIRED_INCLUDES "${GIF_INCLUDE_DIR}")
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CHECK_STRUCT_HAS_MEMBER(GifFileType UserData gif_lib.h GIF_GifFileType_UserData )
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IF(GIF_GifFileType_UserData)
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SET(GIF_VERSION 4)
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ENDIF()
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CMAKE_POP_CHECK_STATE()
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ENDIF()
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# handle the QUIETLY and REQUIRED arguments and set GIF_FOUND to TRUE if
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# all listed variables are TRUE
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INCLUDE(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
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FIND_PACKAGE_HANDLE_STANDARD_ARGS(GIF REQUIRED_VARS GIF_LIBRARY GIF_INCLUDE_DIR
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VERSION_VAR GIF_VERSION )
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MARK_AS_ADVANCED(GIF_INCLUDE_DIR GIF_LIBRARY)
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