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1 | # Copyright (c) 2010 Vladimir Prus. |
2 | # Copyright (c) 2013 Steven Watanabe | |
3 | # | |
4 | # Use, modification and distribution is subject to the Boost Software | |
5 | # License Version 1.0. (See accompanying file LICENSE_1_0.txt or | |
6 | # http://www.boost.org/LICENSE_1_0.txt) | |
7 | ||
8 | # Supports the libpng library | |
9 | # | |
10 | # After 'using libpng', the following targets are available: | |
11 | # | |
12 | # /libpng//libpng -- The libpng library | |
13 | ||
14 | import project ; | |
15 | import ac ; | |
16 | import errors ; | |
17 | import "class" : new ; | |
18 | import targets ; | |
19 | import path ; | |
20 | import modules ; | |
21 | import errors ; | |
22 | import indirect ; | |
23 | import property ; | |
24 | import property-set ; | |
25 | ||
26 | header = png.h ; | |
27 | names = png ; | |
28 | ||
29 | sources = png.c pngerror.c pngget.c pngmem.c pngpread.c pngread.c pngrio.c pngrtran.c pngrutil.c | |
30 | pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c pngwutil.c ; | |
31 | ||
32 | library-id = 0 ; | |
33 | ||
34 | if --debug-configuration in [ modules.peek : ARGV ] | |
35 | { | |
36 | .debug = true ; | |
37 | } | |
38 | ||
39 | # Initializes the libpng library. | |
40 | # | |
41 | # libpng can be configured either to use pre-existing binaries | |
42 | # or to build the library from source. | |
43 | # | |
44 | # Options for configuring a prebuilt libpng:: | |
45 | # | |
46 | # <search> | |
47 | # The directory containing the libpng binaries. | |
48 | # <name> | |
49 | # Overrides the default library name. | |
50 | # <include> | |
51 | # The directory containing the libpng headers. | |
52 | # | |
53 | # If none of these options is specified, then the environmental | |
54 | # variables LIBPNG_LIBRARY_PATH, LIBPNG_NAME, and LIBPNG_INCLUDE will | |
55 | # be used instead. | |
56 | # | |
57 | # Options for building libpng from source:: | |
58 | # | |
59 | # <source> | |
60 | # The libpng source directory. Defaults to the environmental variable | |
61 | # LIBPNG_SOURCE. | |
62 | # <tag> | |
63 | # A rule which computes the actual name of the compiled | |
64 | # libraries based on the build properties. Ignored | |
65 | # when using precompiled binaries. | |
66 | # <build-name> | |
67 | # The base name to use for the compiled library. Ignored | |
68 | # when using precompiled binaries. | |
69 | # | |
70 | # Examples:: | |
71 | # | |
72 | # # Find libpng in the default system location | |
73 | # using libpng ; | |
74 | # # Build libpng from source | |
75 | # using libpng : 1.5.4 : <source>/home/steven/libpng-1.5.4 ; | |
76 | # # Find libpng in /usr/local | |
77 | # using libpng : 1.5.4 | |
78 | # : <include>/usr/local/include <search>/usr/local/lib ; | |
79 | # # Build libpng from source for msvc and find | |
80 | # # prebuilt binaries for gcc. | |
81 | # using libpng : 1.5.4 : <source>C:/Devel/src/libpng-1.5.4 : <toolset>msvc ; | |
82 | # using libpng : 1.5.4 : : <toolset>gcc ; | |
83 | # | |
84 | rule init ( | |
85 | version ? | |
86 | # The libpng version (currently ignored) | |
87 | ||
88 | : options * | |
89 | # A list of the options to use | |
90 | ||
91 | : requirements * | |
92 | # The requirements for the libpng target | |
93 | ||
94 | : is-default ? | |
95 | # Default configurations are only used when libpng | |
96 | # has not yet been configured. | |
97 | ) | |
98 | { | |
99 | local caller = [ project.current ] ; | |
100 | ||
101 | if ! $(.initialized) | |
102 | { | |
103 | .initialized = true ; | |
104 | ||
105 | project.initialize $(__name__) ; | |
106 | .project = [ project.current ] ; | |
107 | project libpng ; | |
108 | } | |
109 | ||
110 | local library-path = [ property.select <search> : $(options) ] ; | |
111 | library-path = $(library-path:G=) ; | |
112 | local include-path = [ property.select <include> : $(options) ] ; | |
113 | include-path = $(include-path:G=) ; | |
114 | local source-path = [ property.select <source> : $(options) ] ; | |
115 | source-path = $(source-path:G=) ; | |
116 | local library-name = [ property.select <name> : $(options) ] ; | |
117 | library-name = $(library-name:G=) ; | |
118 | local tag = [ property.select <tag> : $(options) ] ; | |
119 | tag = $(tag:G=) ; | |
120 | local build-name = [ property.select <build-name> : $(options) ] ; | |
121 | build-name = $(build-name:G=) ; | |
122 | ||
123 | condition = [ property-set.create $(requirements) ] ; | |
124 | condition = [ property-set.create [ $(condition).base ] ] ; | |
125 | ||
126 | local no-build-from-source ; | |
127 | # Ignore environmental LIBPNG_SOURCE if this initialization | |
128 | # requested to search for a specific pre-built library. | |
129 | if $(library-path) || $(include-path) || $(library-name) | |
130 | { | |
131 | if $(source-path) || $(tag) || $(build-name) | |
132 | { | |
133 | errors.user-error "incompatible options for libpng:" | |
134 | [ property.select <search> <include> <name> : $(options) ] "and" | |
135 | [ property.select <source> <tag> <build-name> : $(options) ] ; | |
136 | } | |
137 | else | |
138 | { | |
139 | no-build-from-source = true ; | |
140 | } | |
141 | } | |
142 | ||
143 | source-path ?= [ modules.peek : LIBPNG_SOURCE ] ; | |
144 | ||
145 | if $(.configured.$(condition)) | |
146 | { | |
147 | if $(is-default) | |
148 | { | |
149 | if $(.debug) | |
150 | { | |
151 | ECHO "notice: [libpng] libpng is already configured" ; | |
152 | } | |
153 | } | |
154 | else | |
155 | { | |
156 | errors.user-error "libpng is already configured" ; | |
157 | } | |
158 | return ; | |
159 | } | |
160 | else if $(source-path) && ! $(no-build-from-source) | |
161 | { | |
162 | build-name ?= png ; | |
163 | library-id = [ CALC $(library-id) + 1 ] ; | |
164 | tag = [ MATCH ^@?(.*)$ : $(tag) ] ; | |
165 | if $(tag) && ! [ MATCH ^([^%]*)%([^%]+)$ : $(tag) ] | |
166 | { | |
167 | tag = [ indirect.make $(tag) : [ $(caller).project-module ] ] ; | |
168 | } | |
169 | sources = [ path.glob $(source-path) : $(sources) ] ; | |
170 | if $(.debug) | |
171 | { | |
172 | ECHO "notice: [libpng] Building libpng from source as $(build-name)" ; | |
173 | if $(condition) | |
174 | { | |
175 | ECHO "notice: [libpng] Condition" [ $(condition).raw ] ; | |
176 | } | |
177 | if $(sources) | |
178 | { | |
179 | ECHO "notice: [libpng] found libpng source in $(source-path)" ; | |
180 | } | |
181 | else | |
182 | { | |
183 | ECHO "warning: [libpng] could not find libpng source in $(source-path)" ; | |
184 | } | |
185 | } | |
186 | local target ; | |
187 | if $(sources) { | |
188 | target = [ targets.create-typed-target LIB : $(.project) | |
189 | : $(build-name).$(library-id) | |
190 | : $(sources) | |
191 | : $(requirements) | |
192 | <tag>@$(tag) | |
193 | <include>$(source-path) | |
194 | <toolset>msvc:<define>_CRT_SECURE_NO_DEPRECATE | |
195 | <toolset>msvc:<define>_SCL_SECURE_NO_DEPRECATE | |
196 | <link>shared:<define>LIBPNG_DLL | |
197 | : | |
198 | : <include>$(source-path) ] ; | |
199 | } | |
200 | ||
201 | local mt = [ new ac-library libpng : $(.project) : $(condition) ] ; | |
202 | $(mt).set-header $(header) ; | |
203 | $(mt).set-default-names $(names) ; | |
204 | if $(target) | |
205 | { | |
206 | $(mt).set-target $(target) ; | |
207 | } | |
208 | targets.main-target-alternative $(mt) ; | |
209 | } else { | |
210 | if $(.debug) | |
211 | { | |
212 | ECHO "notice: [libpng] Using pre-installed library" ; | |
213 | if $(condition) | |
214 | { | |
215 | ECHO "notice: [libpng] Condition" [ $(condition).raw ] ; | |
216 | } | |
217 | } | |
218 | ||
219 | local mt = [ new ac-library libpng : $(.project) : $(condition) : | |
220 | $(include-path) : $(library-path) : $(library-name) : $(root) ] ; | |
221 | $(mt).set-header $(header) ; | |
222 | $(mt).set-default-names $(names) ; | |
223 | targets.main-target-alternative $(mt) ; | |
224 | } | |
225 | .configured.$(condition) = true ; | |
226 | } |