patch applied (packages/regex-base): Make setup script compileagain after recent Cabal changes

[Claus Reinke]

[subject taken from cvs-libraries@; discussion directed to libraries@]

does anyone else feel that there is something wrong in haskell library
land? i'm picking on cabal here as one of  "the usual suspects", but it 
seems to have become the rule that otherwise stable code has to be 
fixed every so often, to accomodate new compiler versions, new 
library dependency versions, new cabal versions, new xyz versions,..

it is almost as if everything feels free these days to evolve in non-
backwards-compatible ways, following the motto "what do i care 
for my apis of yesterday?". 

with the ongoing trend towards separately evolving libraries rather 
than prepackaged kitchen-sink releases, this means that useful 
libraries die quickly, and have to be revived continuously, or they 
will be left behind. one symptom is "get the latest from hackage" 
replacing useful extra libraries kept in sync with each other (never 
mind that the hackage versions are no more likely to work without 
fixes than the in-repository versions).

it is often small things ("that function/option has been renamed", 
"you now need to import x instead of y", "you can work around 
this by using 2 cabal files, then removing one depending on 
context", etc.), but as all dependencies keep eroding in this way, 
haskell projects are now built on sand rather than firm foundations, 
requiring constant attention just to avoid falling behind - attention 
that would better be focussed on development than maintenance.

just a thought,
claus

ps. perhaps i've misunderstood, and there is in fact a haskell
    cabal trying to introduce as many version incompatibilities
    as possible, to ensure a market demand for cabal.. ?-)