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Diffstat (limited to 'share/cmake-3.10/Modules/FindGIF.cmake')
| -rw-r--r-- | share/cmake-3.10/Modules/FindGIF.cmake | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/share/cmake-3.10/Modules/FindGIF.cmake b/share/cmake-3.10/Modules/FindGIF.cmake new file mode 100644 index 0000000..0843d5f --- /dev/null +++ b/share/cmake-3.10/Modules/FindGIF.cmake @@ -0,0 +1,98 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +#.rst: +# FindGIF +# ------- +# +# This finds the GIF library (giflib) +# +# The module defines the following variables: +# +# ``GIF_FOUND`` +# True if giflib was found +# ``GIF_LIBRARIES`` +# Libraries to link to in order to use giflib +# ``GIF_INCLUDE_DIR`` +# where to find the headers +# ``GIF_VERSION`` +# 3, 4 or a full version string (eg 5.1.4) for versions >= 4.1.6 +# +# The minimum required version of giflib can be specified using the +# standard syntax, e.g. find_package(GIF 4) +# +# $GIF_DIR is an environment variable that would correspond to the +# ./configure --prefix=$GIF_DIR + +# Created by Eric Wing. +# Modifications by Alexander Neundorf, Ben Campbell + +find_path(GIF_INCLUDE_DIR gif_lib.h + HINTS + ENV GIF_DIR + PATH_SUFFIXES include + PATHS + ~/Library/Frameworks + /usr/freeware +) + +# the gif library can have many names :-/ +set(POTENTIAL_GIF_LIBS gif libgif ungif libungif giflib giflib4) + +find_library(GIF_LIBRARY + NAMES ${POTENTIAL_GIF_LIBS} + HINTS + ENV GIF_DIR + PATH_SUFFIXES lib + PATHS + ~/Library/Frameworks + /usr/freeware +) + +# see readme.txt +set(GIF_LIBRARIES ${GIF_LIBRARY}) + +# Very basic version detection. +# The GIF_LIB_VERSION string in gif_lib.h seems to be unreliable, since it seems +# to be always " Version 2.0, " in versions 3.x of giflib. +# In version 4 the member UserData was added to GifFileType, so we check for this +# one. +# Versions after 4.1.6 define GIFLIB_MAJOR, GIFLIB_MINOR, and GIFLIB_RELEASE +# see http://giflib.sourceforge.net/gif_lib.html#compatibility +if(GIF_INCLUDE_DIR) + include(${CMAKE_CURRENT_LIST_DIR}/CMakePushCheckState.cmake) + include(${CMAKE_CURRENT_LIST_DIR}/CheckStructHasMember.cmake) + CMAKE_PUSH_CHECK_STATE() + set(CMAKE_REQUIRED_QUIET ${GIF_FIND_QUIETLY}) + set(CMAKE_REQUIRED_INCLUDES "${GIF_INCLUDE_DIR}") + + # Check for the specific version defines (>=4.1.6 only) + file(STRINGS ${GIF_INCLUDE_DIR}/gif_lib.h _GIF_DEFS REGEX "^[ \t]*#define[ \t]+GIFLIB_(MAJOR|MINOR|RELEASE)") + if(_GIF_DEFS) + # yay - got exact version info + string(REGEX REPLACE ".*GIFLIB_MAJOR ([0-9]+).*" "\\1" _GIF_MAJ "${_GIF_DEFS}") + string(REGEX REPLACE ".*GIFLIB_MINOR ([0-9]+).*" "\\1" _GIF_MIN "${_GIF_DEFS}") + string(REGEX REPLACE ".*GIFLIB_RELEASE ([0-9]+).*" "\\1" _GIF_REL "${_GIF_DEFS}") + set(GIF_VERSION "${_GIF_MAJ}.${_GIF_MIN}.${_GIF_REL}") + else() + # use UserData field to sniff version instead + CHECK_STRUCT_HAS_MEMBER(GifFileType UserData gif_lib.h GIF_GifFileType_UserData ) + if(GIF_GifFileType_UserData) + set(GIF_VERSION 4) + else() + set(GIF_VERSION 3) + endif() + endif() + + unset(_GIF_MAJ) + unset(_GIF_MIN) + unset(_GIF_REL) + unset(_GIF_DEFS) + CMAKE_POP_CHECK_STATE() +endif() + +include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake) +FIND_PACKAGE_HANDLE_STANDARD_ARGS(GIF REQUIRED_VARS GIF_LIBRARY GIF_INCLUDE_DIR + VERSION_VAR GIF_VERSION ) + +mark_as_advanced(GIF_INCLUDE_DIR GIF_LIBRARY) |