ceph/src/boost/tools/build/src/tools/features/os-feature.jam

   1 # Copyright 2017 Rene Rivera
   2 # Distributed under the Boost Software License, Version 1.0.
   3 # (See accompanying file LICENSE_1_0.txt or copy at
   4 # http://www.boost.org/LICENSE_1_0.txt)
   5
   6 # TODO: Documentation.
   7
   8 import feature ;
   9 import modules ;
  10 import os ;
  11
  12 .os-names =
  13     aix android appletv bsd cygwin darwin freebsd haiku hpux iphone linux
  14     netbsd openbsd osf qnx qnxnto sgi solaris unix unixware windows vms vxworks
  15
  16     # Not actually an OS -- used for targeting bare metal where object
  17     # format is ELF.  This catches both -elf and -eabi gcc targets as well
  18     # as other compilers targeting ELF. It is not clear how often we need
  19     # the 'elf' key as opposed to other bare metal targets, but let us
  20     # stick with gcc naming.
  21     elf
  22     ;
  23
  24 # Feature used to determine which OS we're on. New <target-os> and <host-os>
  25 # features should be used instead.
  26 local os = [ modules.peek : OS ] ;
  27 feature.feature os : $(os) : propagated link-incompatible ;
  28
  29 # Translates from bjam current OS to the os tags used in host-os and
  30 # target-os, i.e. returns the running host-os.
  31 #
  32 local rule default-host-os ( )
  33 {
  34     local host-os ;
  35     if [ os.name ] in $(.os-names:U)
  36     {
  37         host-os = [ os.name ] ;
  38     }
  39     else
  40     {
  41         switch [ os.name ]
  42         {
  43             case NT           : host-os = windows ;
  44             case AS400        : host-os = unix    ;
  45             case MINGW        : host-os = windows ;
  46             case BSDI         : host-os = bsd     ;
  47             case COHERENT     : host-os = unix    ;
  48             case DRAGONFLYBSD : host-os = bsd     ;
  49             case IRIX         : host-os = sgi     ;
  50             case HAIKU        : host-os = haiku   ;
  51             case MACOSX       : host-os = darwin  ;
  52             case KFREEBSD     : host-os = freebsd ;
  53             case LINUX        : host-os = linux   ;
  54             case VMS          : host-os = vms     ;
  55             case SUNOS        :
  56                 ECHO
  57                     "SunOS is not a supported operating system."
  58                     "We believe last version of SunOS was released in 1992, "
  59                     "so if you get this message, something is very wrong with "
  60                     "configuration logic. Please report this as a bug. " ;
  61                 EXIT ;
  62             case *            : host-os = unix    ;
  63         }
  64     }
  65     return $(host-os:L) ;
  66 }
  67
  68
  69 # The two OS features define a known set of abstract OS names. The host-os is
  70 # the OS under which bjam is running. Even though this should really be a fixed
  71 # property we need to list all the values to prevent unknown value errors. Both
  72 # set the default value to the current OS to account for the default use case of
  73 # building on the target OS.
  74 feature.feature host-os : $(.os-names) ;
  75 feature.set-default host-os : [ default-host-os ] ;
  76
  77 feature.feature target-os : $(.os-names) : propagated link-incompatible ;
  78 feature.set-default target-os : [ default-host-os ] ;