gcc: Get rid of crossAttrs

Only a little bit was left

pkgs/development/compilers/gcc/4.9/default.nix

@@ -25,7 +25,8 @@
 , libcCross ? null
 , crossStageStatic ? false
 , libpthread ? null, libpthreadCross ? null  # required for GNU/Hurd
-, stripped ? true
+, # Strip kills static libs of other archs (hence no cross)
+  stripped ? hostPlatform == buildPlatform && targetPlatform == hostPlatform
 , gnused ? null
 , darwin ? null
 , buildPlatform, hostPlatform, targetPlatform
@@ -393,21 +394,17 @@ stdenv.mkDerivation ({
 
   targetConfig = if targetPlatform != hostPlatform then targetPlatform.config else null;
 
-  buildFlags = if bootstrap then
-    (if profiledCompiler then "profiledbootstrap" else "bootstrap")
-    else "";
+  buildFlags = optional
+    (bootstrap && hostPlatform == buildPlatform)
+    (if profiledCompiler then "profiledbootstrap" else "bootstrap");
+
+  dontStrip = !stripped;
 
   installTargets =
     if stripped
     then "install-strip"
     else "install";
 
-  /* For cross-built gcc (build != host == target) */
-  crossAttrs = {
-    dontStrip = true;
-    buildFlags = "";
-  };
-
   # http://gcc.gnu.org/install/specific.html#x86-64-x-solaris210
   ${if hostPlatform.system == "x86_64-solaris" then "CC" else null} = "gcc -m64";
 
@@ -505,9 +502,6 @@ stdenv.mkDerivation ({
   installTargets = "install-gcc install-target-libgcc";
 }
 
-# Strip kills static libs of other archs (hence targetPlatform != hostPlatform)
-// optionalAttrs (!stripped || targetPlatform != hostPlatform) { dontStrip = true; }
-
 // optionalAttrs (enableMultilib) { dontMoveLib64 = true; }
 
 // optionalAttrs (langJava) {