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authorChris Dyer <cdyer@cs.cmu.edu>2012-10-11 14:06:32 -0400
committerChris Dyer <cdyer@cs.cmu.edu>2012-10-11 14:06:32 -0400
commit07ea7b64b6f85e5798a8068453ed9fd2b97396db (patch)
tree644496a1690d84d82a396bbc1e39160788beb2cd /jam-files/boost-build/tools/zlib.jam
parent37b9e45e5cb29d708f7249dbe0b0fb27685282a0 (diff)
parenta36fcc5d55c1de84ae68c1091ebff2b1c32dc3b7 (diff)
Merge branch 'master' of https://github.com/redpony/cdec
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-# Copyright (c) 2010 Vladimir Prus.
-#
-# 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 zlib library
-#
-# After 'using zlib', the following targets are available:
-#
-# /zlib//zlib -- The zlib library
-
-
-# In addition to direct purpose of supporting zlib, this module also
-# serves as canonical example of how third-party condiguration works
-# in Boost.Build. The operation is as follows
-#
-# - For each 'using zlib : condition ... : ...' we create a target alternative
-# for zlib, with the specified condition.
-# - There's one target alternative for 'zlib' with no specific condition
-# properties.
-#
-# Two invocations of 'using zlib' with the same condition but different
-# properties are not permitted, e.g.:
-#
-# using zlib : condition <target-os>windows : include foo ;
-# using zlib : condition <target-os>windows : include bar ;
-#
-# is in error. One exception is for empty condition, 'using' without any
-# parameters is overridable. That is:
-#
-# using zlib ;
-# using zlib : include foo ;
-#
-# Is OK then the first 'using' is ignored. Likewise if the order of the statements
-# is reversed.
-#
-# When 'zlib' target is built, a target alternative is selected as usual for
-# Boost.Build. The selected alternative is a custom target class, which:
-#
-# - calls ac.find-include-path to find header path. If explicit path is provided
-# in 'using', only that path is checked, and if no header is found there, error
-# is emitted. Otherwise, we check a directory specified using ZLIB_INCLUDE
-# environment variable, and failing that, in standard directories.
-# [TODO: document sysroot handling]
-# - calls ac.find-library to find the library, in an identical fashion.
-#
-
-import project ;
-import ac ;
-import errors ;
-import "class" : new ;
-import targets ;
-
-project.initialize $(__name__) ;
-project = [ project.current ] ;
-project zlib ;
-
-header = zlib.h ;
-names = z zlib zll zdll ;
-
-.default-alternative = [ new ac-library zlib : $(project) ] ;
-$(.default-alternative).set-header $(header) ;
-$(.default-alternative).set-default-names $(names) ;
-targets.main-target-alternative $(.default-alternative) ;
-
-rule init ( * : * )
-{
- if ! $(condition)
- {
- # Special case the no-condition case so that 'using' without parameters
- # can mix with more specific 'using'.
- $(.default-alternative).reconfigure $(1) : $(2) : $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ;
- }
- else
- {
- # FIXME: consider if we should allow overriding definitions for a given
- # condition -- e.g. project-config.jam might want to override whatever is
- # in user-config.jam.
- local mt = [ new ac-library zlib : $(project)
- : $(1) : $(2) : $(3) : $(4) : $(5) : $(6) : $(7) : $(8) : $(9) ] ;
- $(mt).set-header $(header) ;
- $(mt).set-default-names $(names) ;
- targets.main-target-alternative $(mt) ;
- }
-}
-
-
-
-
-
-