From 3694b0f892867a7b5d714eb7efa6532683a4bdc4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Llu=C3=ADs=20Batlle=20i=20Rossell?= <viric@viric.name>
Date: Sun, 19 Aug 2012 13:22:54 +0200
Subject: [PATCH] glibc: setting --enable-kernel=2.6.35

It was taking 2.4.0 as default, therefore, not using syscalls over 2.4.0
We may see performance improvements (openat, ...)
---
 pkgs/development/libraries/glibc/2.13/common.nix  | 2 ++
 pkgs/os-specific/linux/kernel-headers/default.nix | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/pkgs/development/libraries/glibc/2.13/common.nix b/pkgs/development/libraries/glibc/2.13/common.nix
index 535fb373e04..5db9e08e3f9 100644
--- a/pkgs/development/libraries/glibc/2.13/common.nix
+++ b/pkgs/development/libraries/glibc/2.13/common.nix
@@ -110,6 +110,8 @@ stdenv.mkDerivation ({
     (if profilingLibraries
      then "--enable-profile"
      else "--disable-profile")
+  ] ++ stdenv.lib.optionals (cross == null) [
+    "--enable-kernel=${kernelHeaders.versionForGlibc}"
   ] ++ stdenv.lib.optionals (cross != null) [
     (if cross.withTLS then "--with-tls" else "--without-tls")
     (if cross.float == "soft" then "--without-fp" else "--with-fp")
diff --git a/pkgs/os-specific/linux/kernel-headers/default.nix b/pkgs/os-specific/linux/kernel-headers/default.nix
index 3fb5ef8ef2d..f6004ccb151 100644
--- a/pkgs/os-specific/linux/kernel-headers/default.nix
+++ b/pkgs/os-specific/linux/kernel-headers/default.nix
@@ -59,4 +59,8 @@ stdenv.mkDerivation {
       ln -s asm $out/include/asm-x86
     fi
   '';
+
+  passthru = {
+    versionForGlibc = "2.6.35";
+  };
 }