From ca92853163eca46b480fd0f6f6a38f4891fc33fd Mon Sep 17 00:00:00 2001
From: Michael Raskin <7c6f434c@mail.ru>
Date: Fri, 4 Nov 2011 21:31:07 +0000
Subject: [PATCH] Make cross-buildable

svn path=/nixpkgs/trunk/; revision=30238
---
 pkgs/development/tools/parsing/flex/flex-2.5.35.nix | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/pkgs/development/tools/parsing/flex/flex-2.5.35.nix b/pkgs/development/tools/parsing/flex/flex-2.5.35.nix
index ae68bb65d7b2..66ece227c924 100644
--- a/pkgs/development/tools/parsing/flex/flex-2.5.35.nix
+++ b/pkgs/development/tools/parsing/flex/flex-2.5.35.nix
@@ -13,6 +13,13 @@ stdenv.mkDerivation {
   buildInputs = [yacc];
   propagatedBuildNativeInputs = [m4];
 
+  crossAttrs = {
+    preConfigure = ''
+      export ac_cv_func_malloc_0_nonnull=yes
+      export ac_cv_func_realloc_0_nonnull=yes
+    '';
+  };
+
   meta = {
     description = "A fast lexical analyser generator";
   };