* Don't strip debug info on Darwin, otherwise links by libtool fail

("/usr/bin/ld: can't use -s with -r (resulting file would not be
  relocatable)").
* Since stdenv/generic had to be modified for this, I forked it in
  situ.  This should be merged later.

svn path=/nixpkgs/trunk/; revision=1121

pkgs/stdenv/darwin/prehook.sh

@@ -2,3 +2,4 @@ export NIX_ENFORCE_PURITY=
 export NIX_DONT_SET_RPATH=1
 export NIX_NO_SELF_RPATH=1
 dontFixLibtool=1
+NIX_STRIP_DEBUG=0