From a4c35d03933b514f1946d78048e144fdc2819fb5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Llu=C3=ADs=20Batlle=20i=20Rossell?=
 <viric@vicerveza.homeunix.net>
Date: Sat, 21 Jan 2012 11:22:13 +0000
Subject: [PATCH] I made the use of ccacheWrapper somewhat easier.

svn path=/nixpkgs/trunk/; revision=31756
---
 pkgs/top-level/all-packages.nix | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f51000ee628..c9385adcd74 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -2895,12 +2895,21 @@ let
 
   # Wrapper that works as gcc or g++
   # It can be used by setting in nixpkgs config like this, for example:
-  #    replaceStdenv = { pkgs }: pkgs.ccacheStdenv "exports CCACHE_DIR=/var/ccache";
+  #    replaceStdenv = { pkgs }: pkgs.ccacheStdenv;
   # But if you build in chroot, you should have that path in chroot
   # If instantiated directly, it will use the HOME/.ccache as cache directory.
-  ccacheWrapper = { extraConfig ? "" }: wrapGCC (ccache.links extraConfig);
-  ccacheStdenv = extraConfig: overrideGCC stdenv
-    (ccacheWrapper { inherit extraConfig; } );
+  # You can use an override in packageOverrides to set extraConfig:
+  #    packageOverrides = pkgs: {
+  #     ccacheWrapper = pkgs.ccacheWrapper.override {
+  #       extraConfig = ''
+  #         CCACHE_COMPRESS=1
+  #         CCACHE_DIR=/bin/.ccache
+  #       '';
+  #     };
+  #
+  ccacheWrapper = makeOverridable ({ extraConfig ? "" }:
+     wrapGCC (ccache.links extraConfig)) {};
+  ccacheStdenv = overrideGCC stdenv ccacheWrapper;
 
   complexity = callPackage ../development/tools/misc/complexity { };