boost-build.jam

# Copyright (C) 2002-2003 David Abrahams.
# Copyright (C) 2002-2003 Vladimir Prus.
# Copyright (C) 2003,2007 Rene Rivera.
# Use, modification and distribution are subject to the
# Boost Software License, Version 1.0. (See accompanying file
# LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#   This is the initial file loaded by Boost Jam when run from any Boost library
# folder. It allows us to choose which Boost Build installation to use for
# building Boost libraries. Unless explicitly selected using a command-line
# option, the version included with the Boost library distribution is used (as
# opposed to any other Boost Build version installed on the user's system).

local rule if-has-file ( file + : dir * )
{
    local result ;
    if $(dir)
    {
        result = [ GLOB $(dir) : $(file) ] ;
    }
    return $(result[1]:P) ;
}

local boost-src = [ if-has-file boost.css :
    [ MATCH --boost=(.*) : $(ARGV) ]
    $(BOOST)
    $(BOOST_ROOT)
    $(self:D)
] ;

BOOST = $(boost-src) ;
BOOST_ROOT = $(boost-src) ;

local boost-build-src = [ if-has-file bootstrap.jam :
    [ MATCH --boost-build=(.*) : $(ARGV) ]
    $(BOOST_BUILD_PATH)
    $(BOOST_BUILD)
    $(self:D)/kernel
    $(self:D)/tools/build/v2/kernel
    $(self:D)/tools/build/src
    /usr/local/share/boost-build/kernel
] ;

boost-build $(boost-build-src) ;