| # Copyright 2003, 2004, 2006 Vladimir Prus |
| # Distributed under the Boost Software License, Version 1.0. |
| # (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt) |
| |
| # This module defines the 'alias' rule and the associated target class. |
| # |
| # Alias is just a main target which returns its source targets without any |
| # processing. For example: |
| # |
| # alias bin : hello test_hello ; |
| # alias lib : helpers xml_parser ; |
| # |
| # Another important use of 'alias' is to conveniently group source files: |
| # |
| # alias platform-src : win.cpp : <os>NT ; |
| # alias platform-src : linux.cpp : <os>LINUX ; |
| # exe main : main.cpp platform-src ; |
| # |
| # Lastly, it is possible to create a local alias for some target, with different |
| # properties: |
| # |
| # alias big_lib : : @/external_project/big_lib/<link>static ; |
| # |
| |
| import "class" : new ; |
| import project ; |
| import property-set ; |
| import targets ; |
| |
| |
| class alias-target-class : basic-target |
| { |
| rule __init__ ( name : project : sources * : requirements * |
| : default-build * : usage-requirements * ) |
| { |
| basic-target.__init__ $(name) : $(project) : $(sources) : |
| $(requirements) : $(default-build) : $(usage-requirements) ; |
| } |
| |
| rule construct ( name : source-targets * : property-set ) |
| { |
| return [ property-set.empty ] $(source-targets) ; |
| } |
| |
| rule compute-usage-requirements ( subvariant ) |
| { |
| local base = [ basic-target.compute-usage-requirements $(subvariant) ] ; |
| return [ $(base).add [ $(subvariant).sources-usage-requirements ] ] ; |
| } |
| } |
| |
| |
| # Declares the 'alias' target. It will process its sources virtual-targets by |
| # returning them unaltered as its own constructed virtual-targets. |
| # |
| rule alias ( name : sources * : requirements * : default-build * : |
| usage-requirements * ) |
| { |
| local project = [ project.current ] ; |
| |
| targets.main-target-alternative |
| [ new alias-target-class $(name) : $(project) |
| : [ targets.main-target-sources $(sources) : $(name) : no-renaming ] |
| : [ targets.main-target-requirements $(requirements) : $(project) ] |
| : [ targets.main-target-default-build $(default-build) : $(project) |
| ] |
| : [ targets.main-target-usage-requirements $(usage-requirements) : |
| $(project) ] |
| ] ; |
| } |
| |
| |
| IMPORT $(__name__) : alias : : alias ; |