[Rdkit-devel] 2019_03_1b1: lots of undefined references to libboost_iostreams functions

[<bal...@un...>]

hello,

there seems to be a glitch in the 2019_03_1b1 build process, where a lot
of link steps fail for me with undefined references to
libboost_iostreams functions. Eg:

    ----8<----
    /usr/bin/ld: lib/libRDKitmaeparser.so.1.2019.03.1b1: undefined reference to `boost::iostreams::zlib::deflated'
    /usr/bin/ld: lib/libRDKitmaeparser.so.1.2019.03.1b1: undefined reference to `boost::iostreams::detail::zlib_base::before(char const*&, char const*, char*&, char*)'

    [...]

    /usr/bin/ld: lib/libRDKitmaeparser.so.1.2019.03.1b1: undefined reference to `boost::iostreams::zlib::default_compression'
    collect2: error: ld returned 1 exit status
    ---->8----

I can make my build complete successfully only with:
    export LDFLAGS="-lboost_iostreams"
Is this to be expected or is there a problem with the build process?
(all previous releases didn't need that)

I can add that ./External/CoordGen/CMakeLists.txt
./Code/GraphMol/FileParsers/CMakeLists.txt and
./Code/RDStreams/CMakeLists.txt do actually contain a:
   set (link_iostreams ${Boost_LIBRARIES})
definition, but apparently link_iostreams is eventually empty (but I
might not have followed correctly the logic of the cmake files)

Building on linux vs boost-1_70_0_rc1

thanks a lot
ciao
gabriele