[Haskell-cafe] Problem building HXT

[gwern0 at gmail.com]

On 2008.04.07 20:17:06 +0200, ln <gusnieslu at student.gu.se> scribbled 1.1K characters:
> Hi,
>
> I would like to try HXT, but I can't manage to build it. I resolved all
> the dependencies, but I get the following error:
>
> > > ln at igemyvuci:~/Desktop/hxt$ make all
> > > make -C src      all VERSION=7.5
> > > make[1]: Entering directory `/home/ln/Desktop/hxt/src'
> > > make install_local_hxt
> > > make[2]: Entering directory `/home/ln/Desktop/hxt/src'
> > > ghc -Wall -O2 -fglasgow-exts -ignore-package hxt -package-name hxt-7.5
> > > -package parsec -package HTTP -package tagsoup --make HXT.hs
> > > [  1 of 143] Compiling Text.XML.HXT.Validator.RE (
> > > Text/XML/HXT/Validator/RE.hs, Text/XML/HXT/Validator/RE.o )
> > > (.....)
> > > [100 of 143] Compiling Text.XML.HXT.Parser.TagSoup (
> > > Text/XML/HXT/Parser/TagSoup.hs, Text/XML/HXT/Parser/TagSoup.o )
>
> > > Text/XML/HXT/Parser/TagSoup.hs:305:21: Not in scope: `options'
> > > make[2]: *** [libHShxt.a] Error 1
>
> The alternative installation method with cabal leads to the same result.
>
> Using Ubuntu 8.04 Beta and GHC6.8. Maybe there are incompabilities with
> newer versions of the dependencies?
>
> Would appreciate any help.
>
> Regards
> Lukas

You got it right. The issue is that in TagSoup.hs there is a line like 'parseTagsOptions (options { foo =...}'. That's invalid syntax AFAIK; more importantly, it's using functions from ndm's TagSoup library. TagSoup, with version 0.5, renamed the Options type to ParseOptions (we know the '(options {...' stuff is intended to be ParseOptions because parseTagsOptions handily comes with an explicit type signature).

So if you simply edit the file such that 'options' -> 'ParseOptions', you should find it working for you.

(I did this against the Darcs repo of HXT, and things compiled for me then on. I'm sending patches.)

--
gwern
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