IOExts problem

[Jim Burton]

IOExts seems to be unavailable on my system, whereas I'm guessing it should be since the file /usr/lib/ghc-6.4.1/hslibs-imports/lang/IOExts.hi exists...(wrong guess?) Within ghci I get

Prelude> :m IOExts
Could not find module `IOExts':
  it is not a module in the current program, or in any known package.
Prelude>

I am trying to build the latest version of haskore with ghc 6.4.1 and have edited the Makefile to put in references to the location of IOExts.hi:

HC_OPTS = -cpp -i/usr/lib/ghc-6.4.1/hslibs-imports/lang/IOExts.hi

IOExtensions.o : /usr/lib/ghc-6.4.1/hslibs-imports/lang/IOExts.hi

Now make gives the error:

jim@unicorn:~/haskore/Src$ make
ghc -c IOExtensions.hs -cpp -i/usr/lib/ghc-6.4.1/hslibs-imports/lang/IOExts.hi

IOExtensions.hs:20:0:
    Failed to load interface for `IOExts':
        Could not find module `IOExts': use -v to see a list of the files searched for
make: *** [IOExtensions.o] Error 1

Is IOExts installed as standard with GHC or do I have to tell it the path to the hi file somehow?

[Simon Marlow-5]

jim burton wrote:
> IOExts seems to be unavailable on my system, whereas I'm guessing it should
> be since the file /usr/lib/ghc-6.4.1/hslibs-imports/lang/IOExts.hi
> exists...(wrong guess?) Within ghci I get
>
> Prelude> :m IOExts
> Could not find module `IOExts':
>   it is not a module in the current program, or in any known package.
> Prelude>

IOExts is (was) in the 'lang' package, which is hidden by default, so you need
to say '-package lang' to get it.  Bear in mind that lang has been deprecated
for a long time, and is gone completely in GHC 6.6, though.

Cheers,
        Simon
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