patch applied (cabal): Various minor improvements to c2hs support

Tue Apr 13 01:32:52 PDT 2010 Duncan Coutts * Various minor improvements to c2hs support - ticket #327: require c2hs version 0.15 as minimum - ticket #536: pass c2hs include dirs of dependent packages - ticket #537: pass c2hs location of gcc -E M ./Distribution/Simple/PreProcess.hs -12 +32 View patch online: http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=cabal;a=darcs_commitdiff;h=2...