127 lines
3.8 KiB
CMake
127 lines
3.8 KiB
CMake
# 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 Graphics Interchange Format (GIF) library (``giflib``)
|
|
|
|
Imported targets
|
|
^^^^^^^^^^^^^^^^
|
|
|
|
This module defines the following :prop_tgt:`IMPORTED` target:
|
|
|
|
``GIF::GIF``
|
|
The ``giflib`` library, if found.
|
|
|
|
Result variables
|
|
^^^^^^^^^^^^^^^^
|
|
|
|
This module will set the following variables in your project:
|
|
|
|
``GIF_FOUND``
|
|
If false, do not try to use GIF.
|
|
``GIF_INCLUDE_DIRS``
|
|
where to find gif_lib.h, etc.
|
|
``GIF_LIBRARIES``
|
|
the libraries needed to use GIF.
|
|
``GIF_VERSION``
|
|
3, 4 or a full version string (eg 5.1.4) for versions >= 4.1.6.
|
|
|
|
Cache variables
|
|
^^^^^^^^^^^^^^^
|
|
|
|
The following cache variables may also be set:
|
|
|
|
``GIF_INCLUDE_DIR``
|
|
where to find the GIF headers.
|
|
``GIF_LIBRARY``
|
|
where to find the GIF library.
|
|
|
|
Hints
|
|
^^^^^
|
|
|
|
``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
|
|
)
|
|
|
|
# the gif library can have many names :-/
|
|
set(POTENTIAL_GIF_LIBS gif libgif ungif libungif giflib giflib4)
|
|
|
|
find_library(GIF_LIBRARY
|
|
NAMES ${POTENTIAL_GIF_LIBS}
|
|
HINTS
|
|
ENV GIF_DIR
|
|
PATH_SUFFIXES lib
|
|
)
|
|
|
|
# Very basic version detection.
|
|
# The GIF_LIB_VERSION string in gif_lib.h seems to be unreliable, since it seems
|
|
# to be always " Version 2.0, " in versions 3.x of giflib.
|
|
# In version 4 the member UserData was added to GifFileType, so we check for this
|
|
# one.
|
|
# Versions after 4.1.6 define GIFLIB_MAJOR, GIFLIB_MINOR, and GIFLIB_RELEASE
|
|
# see http://giflib.sourceforge.net/gif_lib.html#compatibility
|
|
if(GIF_INCLUDE_DIR)
|
|
include(${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 )
|
|
|
|
if(GIF_FOUND)
|
|
set(GIF_INCLUDE_DIRS "${GIF_INCLUDE_DIR}")
|
|
set(GIF_LIBRARIES ${GIF_LIBRARY})
|
|
|
|
if(NOT TARGET GIF::GIF)
|
|
add_library(GIF::GIF UNKNOWN IMPORTED)
|
|
set_target_properties(GIF::GIF PROPERTIES
|
|
INTERFACE_INCLUDE_DIRECTORIES "${GIF_INCLUDE_DIRS}")
|
|
if(EXISTS "${GIF_LIBRARY}")
|
|
set_target_properties(GIF::GIF PROPERTIES
|
|
IMPORTED_LINK_INTERFACE_LANGUAGES "C"
|
|
IMPORTED_LOCATION "${GIF_LIBRARY}")
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
mark_as_advanced(GIF_INCLUDE_DIR GIF_LIBRARY)
|