ceph/src/boost/tools/build/src/tools/generators/searched-lib-generator.jam

   1 # Copyright 2002-2017 Rene Rivera
   2 # Copyright 2002-2017 Vladimir Prus
   3 # Distributed under the Boost Software License, Version 1.0.
   4 # (See accompanying file LICENSE_1_0.txt or copy at
   5 # http://www.boost.org/LICENSE_1_0.txt)
   6
   7 import "class" : new ;
   8 import generators ;
   9
  10 class searched-lib-generator : generator
  11 {
  12     import property-set ;
  13
  14     rule __init__ ( )
  15     {
  16         # The requirements cause the generators to be tried *only* when we are
  17         # building a lib target with a 'search' feature. This seems ugly --- all
  18         # we want is to make sure searched-lib-generator is not invoked deep
  19         # inside transformation search to produce intermediate targets.
  20         generator.__init__ searched-lib-generator : : SEARCHED_LIB ;
  21     }
  22
  23     rule run ( project name ? : property-set : sources * )
  24     {
  25         if $(name)
  26         {
  27             # If 'name' is empty, it means we have not been called to build a
  28             # top-level target. In this case, we just fail immediately, because
  29             # searched-lib-generator cannot be used to produce intermediate
  30             # targets.
  31
  32             local properties = [ $(property-set).raw ] ;
  33             local shared ;
  34             if <link>shared in $(properties)
  35             {
  36                 shared = true ;
  37             }
  38
  39             local search = [ feature.get-values <search> : $(properties) ] ;
  40
  41             local a = [ new null-action $(property-set) ] ;
  42             local lib-name = [ feature.get-values <name> : $(properties) ] ;
  43             lib-name ?= $(name) ;
  44             local t = [ new searched-lib-target $(lib-name) : $(project)
  45                 : $(shared) : $(search) : $(a) ] ;
  46             # We return sources for a simple reason. If there is
  47             #    lib png : z : <name>png ;
  48             # the 'z' target should be returned, so that apps linking to 'png'
  49             # will link to 'z', too.
  50             return [ property-set.create <xdll-path>$(search) ]
  51                    [ virtual-target.register $(t) ] $(sources) ;
  52         }
  53     }
  54 }
  55
  56 generators.register [ new searched-lib-generator ] ;
  57
  58 class searched-lib-target : abstract-file-target
  59 {
  60     rule __init__ ( name
  61         : project
  62         : shared ?
  63         : search *
  64         : action
  65     )
  66     {
  67         abstract-file-target.__init__ $(name) : SEARCHED_LIB : $(project)
  68           : $(action) : ;
  69
  70         self.shared = $(shared) ;
  71         self.search = $(search) ;
  72     }
  73
  74     rule shared ( )
  75     {
  76         return $(self.shared) ;
  77     }
  78
  79     rule search ( )
  80     {
  81         return $(self.search) ;
  82     }
  83
  84     rule actualize-location ( target )
  85     {
  86         NOTFILE $(target) ;
  87     }
  88
  89     rule path ( )
  90     {
  91     }
  92 }