patch applied (cabal): Adjust cpp options passed to cpp, c2hs and hsc2hs

[Duncan Coutts]

Sun Apr 11 12:42:13 PDT 2010  Duncan Coutts <duncan at haskell.org>
  * Adjust cpp options passed to cpp, c2hs and hsc2hs
   * Not changed for cpp, just code refactored.
   * For c2hs add cpp-options and the sysdefines (-D${os}_BUILD_OS etc)
   * For hsc2hs add the sysdefines

    M ./Distribution/Simple/PreProcess.hs -6 +14

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=cabal;a=darcs_commitdiff;h=20100411194213-adfee-e808516cf23db667333aa62327170a7a7b925f78.gz