Jamroot.jam

# (C) Copyright Benedek Thaler 2015-2016.
# Distributed under 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)

# Search for a boost installation to use

# Use BOOST_ROOT if present
# To set this variable, invoke bjam like this:
#
#    $ BOOST_ROOT=/path/to/custom/install bjam
#
# A more permanent solution is to add the following
# to your ~/user-config.jam along with your compilers:
#
#    path-constant BOOST_ROOT : /path/to/custom/install ;
#
#    using gcc ;
#    using clang ;
#

local boost_root = $(BOOST_ROOT) ;

if ! $(boost_root)
{
  boost_root = [ modules.peek : BOOST_ROOT ] ;
}

if ! $(boost_root)
{
  # BOOST_ROOT not set, let's see if the project
  # is in the boost tree (under libs/project/)

  if [ glob ../../boost/version.hpp ]
  {
    boost_root = ../../ ;
  }
}

if ! $(boost_root)
{
  # Still no luck. Let's see if bjam gives us a path

  local dirs = [ modules.peek : BOOST_BUILD_PATH ] ;

  for local dir in $(dirs)
  {
    if [ glob $(dir)/boost/version.hpp ]
    {
      boost_root = $(dir) ;
    }
  }
}

if $(boost_root)
{
  ECHO "Using boost install:" $(boost_root) ;
  path-constant BOOST_ROOT : $(boost_root) ;
}
else
{
  ECHO "No custom boost install specified, will try to use system install" ;
}