blob: 9a11b88e564fa91ec7a80d8cfa958b40f26b7f9b (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
# 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``.
#]=======================================================================]
cmake_policy(PUSH)
cmake_policy(SET CMP0159 NEW) # file(STRINGS) with REGEX updates CMAKE_MATCH_<n>
# 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 ${POTENTIAL_GIF_LIBS}
NAMES_PER_DIR
HINTS
ENV GIF_DIR
PATH_SUFFIXES lib
)
# Very basic version detection.
# The GIF_LIB_VERSION string in gif_lib.h seems to be unreliable, since it seems
# to be always " Version 2.0, " in versions 3.x of giflib.
# In version 4 the member UserData was added to GifFileType, so we check for this
# one.
# Versions after 4.1.6 define GIFLIB_MAJOR, GIFLIB_MINOR, and GIFLIB_RELEASE
# see http://giflib.sourceforge.net/gif_lib.html#compatibility
if(GIF_INCLUDE_DIR)
include(${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)
cmake_policy(POP)
|
