# Check for Boost
set(BOOST_ROOT $ENV{BOOST_DIR} $ENV{BOOST_HOME})
if (BOOST_ROOT)
  set(Boost_NO_SYSTEM_PATHS on)
endif()

# Prevent FindBoost.cmake from looking for system Boost{foo}.cmake
# files
set(Boost_NO_BOOST_CMAKE true)

set(Boost_USE_MULTITHREADED $ENV{BOOST_USE_MULTITHREADED})
find_package(Boost 1.48 QUIET REQUIRED)

# Boost public/private libraries to link to.
# Note: These should all be private as they do not appear in the
# DOLFIN public interface , but there is a linking issues with older
# Boost or CMake. Ubuntu 16.04 requires linking DOLFIN programs with
# filesystem, whereas Ubuntu 16.10 and macOS (Homebrew) do not.
if (Boost_VERSION VERSION_LESS 106100)
  set(DOLFIN_BOOST_COMPONENTS_PUBLIC filesystem)
  set(DOLFIN_BOOST_COMPONENTS_PRIVATE program_options iostreams timer)
else()
  set(DOLFIN_BOOST_COMPONENTS_PUBLIC)
  set(DOLFIN_BOOST_COMPONENTS_PRIVATE filesystem program_options iostreams
    timer)
endif()

# Find required Boost libraries
find_package(Boost COMPONENTS
  ${DOLFIN_BOOST_COMPONENTS_PUBLIC} ${DOLFIN_BOOST_COMPONENTS_PRIVATE} REQUIRED)
set_package_properties(Boost PROPERTIES TYPE REQUIRED
  DESCRIPTION "Boost C++ libraries"
  URL "http://www.boost.org")