On Fri, Apr 27, 2007 at 11:01:49AM +0100, Simon Marlow wrote:
Frederik Eaton wrote:
Hello, I am wondering how to link a package with some dynamic libraries in a way that works with ghci. If I run the command LD_PRELOAD=/lib/libgcc_s.so.1:/usr/lib/libstdc++.so.6 ghci -package mypackage then it is successful; I am able to use package mypackage in ghci. But if I omit the LD_PRELOAD=... part then ghci complains about missing symbols. How do I configure my package so that the LD_PRELOAD=... part of the command is not necessary?
I believe you should be able to use extra-libraries in the .cabal file to get these libraries loaded.
Cheers, Simon
Hello, I have been doing that, $ ghc-pkg describe vectro ... extra-libraries: gsl cblas atlas lapack stdc++ ... I think the problem is that there is a /usr/lib/libstdc++.so.5 and a /usr/lib/libstdc++.so.6 but no /usr/lib/libstdc++.so; when I created the latter, linking to the libstdc++.so.6 link, I was able to use ghci with my package. I wish I knew why /usr/lib/libstdc++.so is missing, but it is missing on 4 out of 4 of the computers I just now checked so I think it is normal for it to be missing, and the problem probably lies with ghci? (by the way, in contrast to stdc++, the links /usr/lib/lib{gsl,cblas,atlas,lapack}.so all exist) Thanks, Frederik -- http://ofb.net/~frederik/