This allows projects which use the DUNE build system and want to use
OPM-Core to specify a dependency in their dune.module file. (i.e. they
don't have to worry about compiler and linker flags anymore.)
opm-core can still be used without having DUNE installed, though. This
means that for users which do not need/want a dependency on DUNE,
nothing changes.
v2: avoid naming conflict of the AX_BOOST_BASE macro with dune-common
by renaming it to OPM_BOOST_BASE.
v3: make the library detection work nicely
v4: Use AX_BOOST_BASE M4 macro from opm-core instead from dune-common
as base for OPM_BOOST_BASE to get rid of a few bugs, reworded
commit message. Thanks to Bård Skaflestad for the review.
