Re: [wxhaskell-users] Problems building wxHaskell 0.9.4-1 on Debian unstable with GHC 6.2.2

[Daan L. <da...@cs...>]

Hi Martin,

 > wxHello,
 >
 > today I built wxHaskell from source and want to share my experience,
 > so that the build process can (hopefully) be fixed.


Thanks for trying wxHaskell on Gentoo.

 > * The first problem is that the permissions on the package.conf file
 >   (located at /usr/lib/ghc-6.2.2 in my setup) are set incorrectly.
 >   I don't know whether that is a GHC or wxHaskell problem, but it
 >   leads to problems when building an example after installing, because
 >   the package.conf file is not world-readable.


The configure script of wxHaskell can take a "--package-conf=<file>"
flag where you can point to a local package configuration file. Read
the docs for "ghc-pkg" on how to create this.

 > * Second, but unfortunately not reproducible, I sometimes got linking
 >   errors about not finding symbols from the Parsec library.  This is
 >   possibly related, because maybe the package.conf file is in a broken
 >   state while GHC searches for the Parsec binaries.  Since I recompiled
 >   wxHaskell a dozen times, with manual chmod and/or removal of the
 >   package.conf file, I have not been able to reproduce the setup for
 >   which this problem occurs.  Maybe someone else has had a similar
 >   experience?


Never heard about this -- maybe it is related to the package conf file.

 > * It is not as easy as implied by the building instructions to install
 >   wxHaskell to another directory, because then the runtime loader will
 >   not find the libraries.  You either have to install in some standard
 >   place (/usr, /usr/local, if that's in your ld.so.conf) or to modify
 >   /etc/ld.so.conf -- not a nice alternative.  I know that this is a general
 >   problem, but maybe it could be mentioned on the installation page.



yeah, I will add a section about this. Actually, you can use the
"--shared-prefix" flag to configure to give a fixed path location such that
the runtime loader will find it. The only reason really to have a dynamic
library is to make the interaction between C and C++ possible -- for all
purposes it should be statically linked. That is why I give it such a specific
version name such that one can always use different installations of wxHaskell
next to each other.

 >
 > Now I'm glad that I got it running, and I want to than the developer(s)
 > for the effort put into wxHaskell.  Keep up the good work and thank you.


Thanks for you feedback,
-- Daan.

 >
 > Best wishes,
 >   Martin
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