Here's take two at sorting out encoding for GHC 7.6.

I've given up on using GHC's built-in encoding functionality for now,
because of a couple of problems:

- badly encoded strings can cause segfaults:
http://hackage.haskell.org/trac/ghc/ticket/7522

 - the set of Windows codepages known by GHC isn't very
comprehensive - e.g. the ISO-8859-15 equivalent, 28605,
is missing.

I still hope to switch over at some point in the future
once these problems are solved, but for now I've extracted
the encoding-related code from haskeline and put it
directly in darcs.

6 patches for repository darcs-unstable@darcs.net:screened:

Tue Jan 15 18:10:40 GMT 2013  Ganesh Sittampalam <ganesh@earth.li>
  * import encoding code from haskeline: Setup.lhs changes

Fri Jan 18 07:35:57 GMT 2013  Ganesh Sittampalam <ganesh@earth.li>
  * import encoding code from haskeline: cabal changes

Fri Jan 18 22:59:47 GMT 2013  Ganesh Sittampalam <ganesh@earth.li>
  * import encoding code from haskeline: source files

Fri Jan 18 23:01:19 GMT 2013  Ganesh Sittampalam <ganesh@earth.li>
  * import encoding code from haskeline: switch over

Fri Jan 18 23:02:38 GMT 2013  Ganesh Sittampalam <ganesh@earth.li>
  * import encoding code from haskeline: move source into Darcs.Util

Sat Jan 19 16:36:10 GMT 2013  Ganesh Sittampalam <ganesh@earth.li>
  * add copyright notices for the imported haskeline code
  licence/copyright taken from haskeline 0.6.4.7:
  BSD3, copyright Judah Jacobson

Attachments

• import-encoding-code-from-haskeline_-setup_lhs-changes.dpatch
• patch-preview.txt
• unnamed

The slightly convoluted setup code for iconv seems to go wrong in some 
circumstances:

http://irclog.perlgeek.de/darcs/2013-02-13#i_6446470

Makes darcs compile with GHC 7.6.

Just adding a note for reference as I was just tracking down the 
history: "take two" was needed because of the problems  with the 
previous attempt - see patch987 and issue2286.