[Haskell-cafe] HaXml and ghci unresolved symbol

Andrea Rossato mailing_list at istitutocolli.org
Sun Sep 10 06:14:18 EDT 2006

Il Sun, Sep 10, 2006 at 11:41:45AM +0200, Lemmih ebbe a scrivere:
> It looks a bit like 'HaXml' has been updated after 'hxml' was built.
> Try rebuilding 'hxml' against the 'HaXml' you've got installed.

No, I installed the together, HaXml first and then hxml

In hxml there where a couple of bugs, and no cabal file - AFAIK hxml is not
maintained anymore - last release was done in 2002.
I put everything in order and compiled it. Works fine in Hugs.
Who knows, it could be just me.

But! Look at this code, only pure HaXml. 
The output should be "a" and works with Hugs:

module Main where
import Text.XML.HaXml

xml = "<a>prova</a>"
doc = xmlParse "tmp" xml
elemName (Document prolog _ (Elem name _ content) _) = name
name = elemName doc

main = putStrLn name

And now:

[12:03:27][andrea at laptop:~/devel/haskell/xml]$ ghc --make xml1.hs -package HaXml -o prova
Chasing modules from: xml1.hs
Compiling Main             ( xml1.hs, xml1.o )
Linking ...
[12:03:42][andrea at laptop:~/devel/haskell/xml]$ ./prova 
[12:03:45][andrea at laptop:~/devel/haskell/xml]$ ghci -package HaXml xml1.hs
Loading package base-1.0 ... linking ... done.
Loading package haskell98-1.0 ... linking ... done.
Loading package HaXml-1.13.1 ... linking ... done.
Skipping  Main             ( xml1.hs, xml1.o )
Ok, modules loaded: Main.
Prelude Main> main
<interactive>: xml1.o: unknown symbol `TextziXMLziHaXmlziParse_xmlParse_closure'

Prelude Main> :quit
Leaving GHCi.

This is just amazing for a Haskell newbie!


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