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Diffstat (limited to 'src/boost/tools/build/src/tools/libpng.jam')
| -rw-r--r-- | src/boost/tools/build/src/tools/libpng.jam | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/src/boost/tools/build/src/tools/libpng.jam b/src/boost/tools/build/src/tools/libpng.jam new file mode 100644 index 000000000..873db8f96 --- /dev/null +++ b/src/boost/tools/build/src/tools/libpng.jam @@ -0,0 +1,229 @@ +# 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.txt or +# https://www.bfgroup.xyz/b2/LICENSE.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 feature ; +import "class" : new ; +import targets ; +import path ; +import modules ; +import indirect ; +import property ; +import property-set ; + +header = png.h ; + +# On Windows, binary distributions of libpng and package managers +# name the library differently (e.g. vcpkg installs libpng16.lib). +# Listing popular names increases chances of successful look-up. +names = libpng libpng16 png png16 ; + +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. This option is + # deprecated. A configuration will be treated + # as a default when none of <include>, <search>, + # <name>, and <source> are present. + ) +{ + local caller = [ project.current ] ; + + if ! $(.initialized) + { + .initialized = true ; + + project.initialize $(__name__) ; + .project = [ project.current ] ; + project libpng ; + } + + local library-path = [ feature.get-values <search> : $(options) ] ; + local include-path = [ feature.get-values <include> : $(options) ] ; + local source-path = [ feature.get-values <source> : $(options) ] ; + local library-name = [ feature.get-values <name> : $(options) ] ; + local tag = [ feature.get-values <tag> : $(options) ] ; + local build-name = [ feature.get-values <build-name> : $(options) ] ; + + if ! $(library-path) && ! $(include-path) && ! $(source-path) && ! $(library-name) + { + is-default = true ; + } + + condition = [ property-set.create $(requirements) ] ; + condition = [ property-set.create [ $(condition).base ] ] ; + + # 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 + { + 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) + { + build-name ?= png ; + library-id = [ CALC $(library-id) + 1 ] ; + tag = [ MATCH ^@?(.*)$ : $(tag) ] ; + if $(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 ; +} |