make gcc 4.1 compile

svn path=/nixpkgs/trunk/; revision=28124

pkgs/development/compilers/gcc-4.1/default.nix

@@ -38,6 +38,8 @@ stdenv.mkDerivation {
 
   buildInputs = [gmp mpfr texinfo];
 
+  enableParallelBuilding = true;
+  
   configureFlags = "
     --disable-multilib
     --disable-libstdcxx-pch

pkgs/top-level/all-packages.nix

@@ -1660,7 +1660,8 @@ let
   });
 
   gcc41 = wrapGCC (makeOverridable (import ../development/compilers/gcc-4.1) {
-    inherit fetchurl stdenv noSysDirs;
+    inherit fetchurl noSysDirs gmp mpfr;
+    stdenv = overrideGCC stdenv gcc42;
     texinfo = texinfo49;
     profiledCompiler = false;
   });