Dear Cafe,<div><br></div><div>I have recently run into a very annoying issue that I was not able to get around. I have a local package that makes use of the snappy compression library, which boasts bindings to C++ through a C wrapper.</div>
<div><br></div><div>Everything compiles fine with ghc --make, but cabal install hits a wall when TemplateHaskell kicks in and decides to load the entire dependency chain.</div><div><br></div><div>Here is the important bit of the error message I get after running &quot;cabal install&quot;</div>
<div><br></div><div><div>Loading package snappy-0.2.0.0 ... linking ... ghc: /home/ubuntu/.cabal/lib/snappy-0.2.0.0/ghc-7.0.3/HSsnappy-0.2.0.0.o: unknown symbol `_ZTV8BSSource&#39;</div><div>ghc: unable to load package `snappy-0.2.0.0&#39;</div>
</div><div><br></div><div>I&#39;m quite certain all the libs are in PATH. &quot;cabal install snappy&quot; installs fine when typed separately by itself and everything works fine (the program works, including compression via snappy) when I compile my local package with ghc --make.</div>
<div><br></div><div>The problem only occurs on a Ubuntu 64-bit server, and I wasn&#39;t able to replicate the issue on my local OS X box. On my local, cabal install works just fine.</div><div><br></div><div>I did find a previous note on Cafe with the exact same problem, but no solution was posted at the time:</div>
<div><br></div><div><a href="http://www.haskell.org/pipermail/haskell-cafe/2010-December/087748.html">http://www.haskell.org/pipermail/haskell-cafe/2010-December/087748.html</a></div><div><br></div><div>Any help is much appreciated.</div>
<div><br></div><div>Cheers,</div><div>Ozgun</div><div><br></div>