Hi Phil,

I hope your Haskell journey so far has been enjoyable. I'm rather new myself, but I'm pretty sure the answer to your question is:

By default, ghc doesn't try to include all the libraries that you import when you compile with "ghc test.hs". You can either specify these manually: "ghc test.hs -package hmatrix" or tell ghc to try and intelligently track down all the relevant packages with: "ghc --make test.hs".

I hope that helps!
--
Jason M. Knight
Ph.D. Electrical Engineering '13
Texas A&M University
Cell: 512-814-8101


On Sun, Dec 19, 2010 at 2:32 PM, gutti <philipp.guttenberg@gmx.net> wrote:

Hi,

I'm very new to Haskell and this Forum, just doing my first steps ... -- Try
to use the hmatrix package for vector and matrix calculations.

The haskell compilation works (no problem in GHCi mode), the gcc however
compilation fails with messages like:
EFA.o: In function `r1bo_info':
(.text+0x48): undefined reference to
`hmatrixzm0zi10zi0zi0_NumericziVector_zdfNumVector1_closure'
EFA.o: In function `r1bs_info':
(.text+0x10a): undefined reference to
`hmatrixzm0zi10zi0zi0_NumericziVector_zdfFractionalVector_closure'

Obviously gcc doesn't know where the according libraries are installed. Same
problem with other packages.

I installed the haskell base system over debian (debian squeeze), gcc
version 4.4.5. - Hmatrix and other packages are installed and build over
cabel into local folder ~/.cabal/lib

Do I need to set a system path, or change cabal options or .. ?

Thanks in advance, Phil



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