[Haskell-cafe] Guidance on symbol error

Hi list. I'm trying to build gruff on Debian Jessie with GHC 7.6.3. I'm building gruff-0.3.3 because gruff-0.3.4 dependencies seem to be too new for Jessie. I was able to build all the dependencies of gruff-0.3.3 (after installing a ton of -dev packages). But when cabal tries to build the gruff package itself, I get this error: /usr/bin/ld: dist/build/gruff/gruff-tmp/src/compute.o: undefined reference to symbol '_ZdaPv@@GLIBCXX_3.4' //usr/lib/x86_64-linux-gnu/libstdc++.so.6: error adding symbols: DSO missing from command line It's been quite a while since I did any C++ programming... could somebody clarify for me what this means? Thank you. -- https://qlfiles.net My PGP public key ID is 0x340EA95A (pgp.mit.edu).