[Haskell-cafe] Re: BerkeleyDBXML linking problems.

[Sebastiaan Visser]

(crosspost from haskell-libraries)

Hello all, again.

Meanwhile I've been able to install this package without too much  
trouble on a Linux system. Unfortunately MacOSX is still a problem.  
Both on Linux and Mac I installed the Berkeley DB and DBXML packages  
with `--prefix=/usr' so all include files and libraries end up in a  
standard place.

Also both on Linux and Mac I installed the Haskell BerkeleyDB bindings  
just with:

   cabal install BerkeleyDB

Because the DBXML include files are installed under /usr/include/dbxml/ 
*.hpp and the BerkeleyDBXML binding accesses them without this prefix  
I did:

   cabal install BerkeleyDBXML --extra-include-dirs=/usr/include/dbxml

On both system installation is not a problem. Compiling the demo  
`adventure' included in de bindings distribution works fine on Linux  
but fails on MacOSX. The errors are the ones in my previous mail  
below. A full hpaste of it can be found here[1].

Any idea where the difference in behaviour comes from on these  
platforms and how to fix this? Unfortunately, my knowledge of the c++  
toolchain and Haskell FFI bindings using these is _very_ limited.

Thanks,
Sebastiaan

[1] http://www.hpaste.org/fastcgi/hpaste.fcgi/view?id=6389#a6389

On Jun 26, 2009, at 12:56 PM, Sebastiaan Visser wrote:
> Hello all,
>
> After manually specifying where to find the appropriate include and  
> library directories for the dbxml distribution, I succeeded to  
> install both the BerkeleyDB and the BerkeleyDBXML Haskell bindings.  
> They both nicely show up in `ghc-pkg list'.
>
> But when I try to compile my own test or the demo program included  
> in the BerkeleyDBXML package it will kindly present me a dozen or so  
> pages of linking errors. The top lines are:
>
>  Undefined symbols:
>    "std::basic_string<char, std::char_traits<char>,  
> std::allocator<char> >::_Rep::_M_destroy(std::allocator<char>  
> const&)", referenced from:
>        __xmlDocument_setContent in  
> libHSBerkeleyDBXML-0.6.2.a(dbxml_helper.o)
>        ...
>
> Do I have to tell GHC where to find the original dbxml libraries  
> when compiling my BerkeleyDBXML aware Haskell programs?
>
> Small system overview:
>  - Mac OS X 10.5.7
>  - GHC 6.10.3
>  - BerkeleyDB 0.7.1
>  - BerkeleyDBXML 0.6.2
>  - gcc/g++ 4.0.1
>
> Any clue on how to fix this?
>
> Thanks,
>
> --
> Sebastiaan Visser