| # Copyright (c) 2010 Vladimir Prus. |
| # Copyright (c) 2013 Steven Watanabe |
| # |
| # Use, modification and distribution is subject to the Boost Software |
| # License Version 1.0. (See accompanying file LICENSE_1_0.txt or |
| # http://www.boost.org/LICENSE_1_0.txt) |
| |
| # Supports the libpng library |
| # |
| # After 'using libpng', the following targets are available: |
| # |
| # /libpng//libpng -- The libpng library |
| |
| import project ; |
| import ac ; |
| import errors ; |
| import "class" : new ; |
| import targets ; |
| import path ; |
| import modules ; |
| import errors ; |
| import indirect ; |
| import property ; |
| import property-set ; |
| |
| header = png.h ; |
| names = png ; |
| |
| sources = png.c pngerror.c pngget.c pngmem.c pngpread.c pngread.c pngrio.c pngrtran.c pngrutil.c |
| pngset.c pngtrans.c pngwio.c pngwrite.c pngwtran.c pngwutil.c ; |
| |
| library-id = 0 ; |
| |
| if --debug-configuration in [ modules.peek : ARGV ] |
| { |
| .debug = true ; |
| } |
| |
| # Initializes the libpng library. |
| # |
| # libpng can be configured either to use pre-existing binaries |
| # or to build the library from source. |
| # |
| # Options for configuring a prebuilt libpng:: |
| # |
| # <search> |
| # The directory containing the libpng binaries. |
| # <name> |
| # Overrides the default library name. |
| # <include> |
| # The directory containing the libpng headers. |
| # |
| # If none of these options is specified, then the environmental |
| # variables LIBPNG_LIBRARY_PATH, LIBPNG_NAME, and LIBPNG_INCLUDE will |
| # be used instead. |
| # |
| # Options for building libpng from source:: |
| # |
| # <source> |
| # The libpng source directory. Defaults to the environmental variable |
| # LIBPNG_SOURCE. |
| # <tag> |
| # A rule which computes the actual name of the compiled |
| # libraries based on the build properties. Ignored |
| # when using precompiled binaries. |
| # <build-name> |
| # The base name to use for the compiled library. Ignored |
| # when using precompiled binaries. |
| # |
| # Examples:: |
| # |
| # # Find libpng in the default system location |
| # using libpng ; |
| # # Build libpng from source |
| # using libpng : 1.5.4 : <source>/home/steven/libpng-1.5.4 ; |
| # # Find libpng in /usr/local |
| # using libpng : 1.5.4 |
| # : <include>/usr/local/include <search>/usr/local/lib ; |
| # # Build libpng from source for msvc and find |
| # # prebuilt binaries for gcc. |
| # using libpng : 1.5.4 : <source>C:/Devel/src/libpng-1.5.4 : <toolset>msvc ; |
| # using libpng : 1.5.4 : : <toolset>gcc ; |
| # |
| rule init ( |
| version ? |
| # The libpng version (currently ignored) |
| |
| : options * |
| # A list of the options to use |
| |
| : requirements * |
| # The requirements for the libpng target |
| |
| : is-default ? |
| # Default configurations are only used when libpng |
| # has not yet been configured. |
| ) |
| { |
| local caller = [ project.current ] ; |
| |
| if ! $(.initialized) |
| { |
| .initialized = true ; |
| |
| project.initialize $(__name__) ; |
| .project = [ project.current ] ; |
| project libpng ; |
| } |
| |
| local library-path = [ property.select <search> : $(options) ] ; |
| library-path = $(library-path:G=) ; |
| local include-path = [ property.select <include> : $(options) ] ; |
| include-path = $(include-path:G=) ; |
| local source-path = [ property.select <source> : $(options) ] ; |
| source-path = $(source-path:G=) ; |
| local library-name = [ property.select <name> : $(options) ] ; |
| library-name = $(library-name:G=) ; |
| local tag = [ property.select <tag> : $(options) ] ; |
| tag = $(tag:G=) ; |
| local build-name = [ property.select <build-name> : $(options) ] ; |
| build-name = $(build-name:G=) ; |
| |
| condition = [ property-set.create $(requirements) ] ; |
| condition = [ property-set.create [ $(condition).base ] ] ; |
| |
| local no-build-from-source ; |
| # Ignore environmental LIBPNG_SOURCE if this initialization |
| # requested to search for a specific pre-built library. |
| if $(library-path) || $(include-path) || $(library-name) |
| { |
| if $(source-path) || $(tag) || $(build-name) |
| { |
| errors.user-error "incompatible options for libpng:" |
| [ property.select <search> <include> <name> : $(options) ] "and" |
| [ property.select <source> <tag> <build-name> : $(options) ] ; |
| } |
| else |
| { |
| no-build-from-source = true ; |
| } |
| } |
| |
| source-path ?= [ modules.peek : LIBPNG_SOURCE ] ; |
| |
| if $(.configured.$(condition)) |
| { |
| if $(is-default) |
| { |
| if $(.debug) |
| { |
| ECHO "notice: [libpng] libpng is already configured" ; |
| } |
| } |
| else |
| { |
| errors.user-error "libpng is already configured" ; |
| } |
| return ; |
| } |
| else if $(source-path) && ! $(no-build-from-source) |
| { |
| build-name ?= png ; |
| library-id = [ CALC $(library-id) + 1 ] ; |
| tag = [ MATCH ^@?(.*)$ : $(tag) ] ; |
| if $(tag) && ! [ MATCH ^([^%]*)%([^%]+)$ : $(tag) ] |
| { |
| tag = [ indirect.make $(tag) : [ $(caller).project-module ] ] ; |
| } |
| sources = [ path.glob $(source-path) : $(sources) ] ; |
| if $(.debug) |
| { |
| ECHO "notice: [libpng] Building libpng from source as $(build-name)" ; |
| if $(condition) |
| { |
| ECHO "notice: [libpng] Condition" [ $(condition).raw ] ; |
| } |
| if $(sources) |
| { |
| ECHO "notice: [libpng] found libpng source in $(source-path)" ; |
| } |
| else |
| { |
| ECHO "warning: [libpng] could not find libpng source in $(source-path)" ; |
| } |
| } |
| local target ; |
| if $(sources) { |
| target = [ targets.create-typed-target LIB : $(.project) |
| : $(build-name).$(library-id) |
| : $(sources) |
| : $(requirements) |
| <tag>@$(tag) |
| <include>$(source-path) |
| <toolset>msvc:<define>_CRT_SECURE_NO_DEPRECATE |
| <toolset>msvc:<define>_SCL_SECURE_NO_DEPRECATE |
| <link>shared:<define>LIBPNG_DLL |
| : |
| : <include>$(source-path) ] ; |
| } |
| |
| local mt = [ new ac-library libpng : $(.project) : $(condition) ] ; |
| $(mt).set-header $(header) ; |
| $(mt).set-default-names $(names) ; |
| if $(target) |
| { |
| $(mt).set-target $(target) ; |
| } |
| targets.main-target-alternative $(mt) ; |
| } else { |
| if $(.debug) |
| { |
| ECHO "notice: [libpng] Using pre-installed library" ; |
| if $(condition) |
| { |
| ECHO "notice: [libpng] Condition" [ $(condition).raw ] ; |
| } |
| } |
| |
| local mt = [ new ac-library libpng : $(.project) : $(condition) : |
| $(include-path) : $(library-path) : $(library-name) : $(root) ] ; |
| $(mt).set-header $(header) ; |
| $(mt).set-default-names $(names) ; |
| targets.main-target-alternative $(mt) ; |
| } |
| .configured.$(condition) = true ; |
| } |